Mercedes-Benz SLR McLaren: the cutting-edge technology of 2 1 century high-performance sports car
460 kW /626 HP high torque V8 supercharged engine
The acceleration time from 0 to 100 km/h is only 3.8 seconds.
The world's first production car with carbon fiber frontal collision buffer components.
High performance brake disc made of fiber reinforced ceramics
In the mid-1950s, Mercedes-Benz SLR set a new standard in the field of high-performance sports cars, which made its name SLR legendary. SLR has created a classic legend with its extraordinary modeling, innovative technology, excellent performance and maneuverability.
Mercedes-Benz and McLaren have successfully created the extraordinary quality of Mercedes-Benz SLR McLaren. Just like the predecessor of the legendary version 1955, the new SLR, which went on sale in autumn of 2003, incorporates the new achievements of epoch-making technological development, such as Mercedes -AMG V8 engine. The engine has a displacement of 5.5 liters and adopts a screw compressor. The maximum output power is 460 kW /626 HP and the maximum torque is 780 Newton? M (3250 rpm), the torque can be kept constant when the engine speed reaches 5000 rpm. The engine makes the performance of the new SLR reach the highest level of its kind: the acceleration time of this high-performance sports car from 0 to 100 km/h is only 3.8 seconds, and it can exceed 200 km/h after 10.6 seconds, and it takes only 28.8 seconds to start from a static state to 300 km/h. The top speed of this two-seater sports car is 334 km/h (tentative).
In order to achieve the best weight distribution, the best dynamic handling and excellent braking stability, Mercedes-Benz SLR McLaren adopts the design of engine center front drive. The V8 engine is fixed on a solid aluminum frame in a low installation position.
This powerful engine has reached the Euro IV emission standard which will be implemented in 2005. Its features also include pressurized air cooling, three valves per cylinder, dry oil pan lubrication and four metal carrier catalytic converters.
Fast-moving three-step shift program
The standard of the new SLR is equipped with a 5-speed automatic transmission, which also has the characteristics of high performance, allowing the driver to choose from three-level shift procedures, so as to determine his own shift speed. When "Manual" is selected, you can use the button on the steering wheel or the trigger function of the gear lever to switch between five gears. In the manual mode, the driver can choose the three-level shift program of "sports car", "super sports car" and "racing car", thus greatly shortening the shift time and further increasing the sports driving experience.
High-tech materials create excellent safety and rigidity.
The body shell of high-performance sports car also fully shows the high-tech characteristics. The body shell, front and rear components, passenger compartment, gull wing door and hood are all made of carbon fiber composite materials. This lightweight and high-strength material originated from the aerospace industry, and its advantages have also been proved in today's F 1 racing car. This high-tech material is about 50% lighter than steel.
In addition, the energy absorption performance of carbon fiber in collision is 4-5 times higher than that of steel or aluminum. In order to make full use of these characteristics, Mercedes-Benz has embedded two 620 mm carbon fiber longitudinal beams in the front structure of the new SLR, so as to absorb all the collision energy in the frontal collision, and at the same time, the deceleration will not exceed the passenger's tolerance. During the collision, the fibers of these components are torn from front to back under the accurately calculated deformation state, thus ensuring constant deceleration.
Therefore, SLR is the world's first production car with laminated carbon fiber collision buffer components. The weight of each carbon fiber longitudinal beam is only 3.4 kg.
The passenger compartment of a high-performance sports car is also made entirely of this high-tech material, which can provide passengers with a very reliable safe space in the event of a frontal, side or tail collision. There are two laminated carbon fiber longitudinal beams and a solid cross beam at the rear of a high-performance sports car, which can effectively absorb energy in the event of collision, thus ensuring that the passenger compartment structure is basically unaffected.
The passenger protection system of the new SLR includes adaptive front passenger airbag, newly developed side airbag, seat belt tensioner and seat belt force limiter. Adaptive front passenger airbags can be deployed in two stages according to the severity of the accident, and side airbags are used for head protection.
Ceramic brake disc and electronic induction braking system (SBC? ) Create excellent braking safety.
The brake disc of gull-wing high-performance sports car also adopts the highest standard of high-tech materials. Mercedes-Benz uses carbon fiber reinforced ceramics to manufacture brake discs, thus achieving excellent performance, heat resistance and durability. Because this material is extremely strong, the maximum deceleration of the large brake disc of SLR can reach 1.3 g, which is also the highest level in production cars. In addition, the total brake pad area of the front axle alone reached 440 square centimeters.
Other functions of the new SLR include electronic induction braking system (electro-hydraulic braking system) and electronically controlled vehicle stable driving system (ESP? ), automatic tire pressure monitor, 18 inch wheel hub, aluminum suspension with the signature of racing construction experts. These characteristics create the necessary standards for perfect dynamic handling and excellent driving safety.
Engine and transmission: V8 engine from automobile race.
A high-tech engine with a torque of 780 Newton meters.
The low emission of metal carrier catalytic converter reaches Euro IV standard.
The side exhaust pipe reproduces the elegance of SLR sports cars in the 1950 s.
The 5-speed automatic transmission has a 3-stage manual shift program.
The surging power and high-tech features in the field of automobile sports are the iconic features of V8 engine carried by Mercedes-Benz SLR McLaren. This means that the 8-cylinder engine independently developed by Mercedes -AMG perfectly matches the high-performance concept of the new SLR.
In the process of developing the engine, AMG engineers applied their professional knowledge accumulated in the field of automobile sports for 30 years and the strict standards of Mercedes-Benz brand. After a detailed conceptual stage, they decided to adopt an 8-cylinder design with a displacement of 5.5 liters and a cylinder angle of 90 degrees. They adopted a screw compressor and the crankshaft was supported by five bearings.
This design has achieved remarkable results: when the speed is 1500 rpm, the torque of the SLR engine reaches more than 600 Newton meters, and when the speed rises to 2000 rpm, the torque is 700 Newton meters. When the speed reaches 3250 rpm, the maximum torque is 780 Newton meters, and when the speed gradually rises to 5000 rpm, the torque remains unchanged. The extraordinary torque curve and agile response ability of sports engine create powerful power. The maximum output power of the engine is 460 kW /626 HP (6500 rpm), and the engine speed reaches a very high level in the same displacement engine. As can be seen from the following data, among the mass-produced road sports cars, the new SLR adopts one of the most powerful engines at present.
V8 cylinder arrangement
Cylinder angle 90 degrees
Number of valves per cylinder 3
The displacement is 5439 ml.
Cylinder diameter/stroke 97.0/92.0mm.
The cylinder spacing is106mm.
The compression ratio is 8.8: 1
The output power is 460kW/626HP (6500rpm).
The maximum torque is 780 Nm (3250-5000 rpm).
The engine mass is 232kg.
The power/mass ratio is 1.9 kW/kg.
With its extraordinary power, Mercedes-Benz SLR McLaren has achieved unparalleled performance in its class:
0–100 km/h 3.8 seconds *
0 to 200 km/h 10.6 second *
0 to 300 km/h 28.8 seconds *
The maximum speed is 334 km/h *
* Represents a provisional value.
The fuel consumption per 100 kilometers is 14.8 liters (NEDC comprehensive fuel consumption, tentative value).
Power of screw compressor
In order to ensure sufficient cylinder inflation, the engine adopts a mechanical compressor with two spiral aluminum rotors. In order to reduce friction loss, the rotor is covered with PTFE coating. The supercharger is so compact that the engine expert can install it between the two cylinder banks of the V8 engine. Despite the space-saving design, the new technology still makes the intake pressure significantly higher than that of the traditional supercharger, because the maximum speed of the two rotors reaches 23,000 rpm, which makes the air enter the intake hole of the 5.5-liter engine with the maximum pressure of 0.9 bar. This means that they can compress about 65,438+0,850 kilograms of air into eight combustion chambers per hour, which is 30% higher than the competitor's supercharging system.
In order to ensure the efficiency as much as possible, AMG engineers have created an intelligent engine management system, which adjusts the operation of the screw compressor according to the engine speed and load, which means that the supercharger only works when necessary. However, once the driver gives an instruction by stepping on the accelerator pedal, the system can ensure that the maximum output power is generated immediately. In this case, the electronic equipment of the engine management system triggers electromagnetic coupling, thus immediately activating the compressor, which is driven by a separate polyethylene V-belt. Because the supercharger can work in a few tenths of a second, even the most sensitive driver cannot notice this state without the support of the supercharger. The circulating damper of the supercharger system opens at part load, which helps to reduce fuel consumption.
Two supercharged intercoolers with independent water circulation.
In addition to the compressor, electronic equipment also monitors all other variables related to the engine, including powertrain management depending on pedal driving characteristics, and electronically controlled vehicle stable driving system (ESP? ) interference or natural transmission. The electronic equipment also ensures the best controlled water circulation of the supercharged intercooling system, because effective charging air cooling is of great significance for powerful output power. This is because cold air is denser than hot air and contains more oxygen for combustion. In the V8 engine of Mercedes-Benz SLR McLaren, two independent supercharged intercoolers are responsible for this key task (one for each cylinder), thus ensuring very low pressure loss.
A very efficient engine supercharged intercooler runs along the pipeline of the air/water heat exchanger: the air compressed and heated by the compressor is cooled by a separate water circulation, so that the process is independent of the external temperature. This means that an 8-cylinder engine can naturally provide its maximum output power and torque at any time. The high performance index of the new SLR8 cylinder engine not only requires good cooling effect of combustion air, but also improves the overall requirements of engine cooling. To this end, engineers adopted wide cooling air inlets and outlets and an 850-watt exhaust fan.
Crankcase dry oil pan lubrication
In other details of SLR engines, Mercedes -AMG engineers also used their rich experience in the field of automobile sports and their experience in designing high-performance engines. For example, the whole engine cylinder block and the lower part of the closed crankcase are made of aluminum, and each crankshaft after precise balance is supported by five bearings made of wear-resistant plastic, so it can transmit the strong power of the supercharged engine for a long time.
Piston is forged, so it can only be produced in small quantities. Like the forged light connecting rod, the piston is accurately measured and weighed and distributed to each engine, thus achieving the minimum balance tolerance. The piston moves in the extremely solid cylinder wall, which has optimized wear resistance and friction. The cylinder wall is made of special components, and other aspects are only used in the field of automobile sports. The dual fuel injection system effectively cools the piston.
The design of oil cooling system is also based on the experience in the field of automobile sports: dry oil pan lubrication system, oil volume of about 1 1 liter, five-stage oil suction pump and two-stage oil pressure pump to ensure reliable lubrication under various road conditions. There is another important side effect of this technology. Because racing cars are usually lubricated by dry oil pan, the engine is short and can be installed in a lower position, thus making the center of gravity lower and helping to improve dynamic maneuverability.
According to the practice of Mercedes -AMG, each SLR engine is hand-made. In order to achieve higher quality, Mercedes -AMG has implemented the principle of "one person, one machine". This means that each engine is in the charge of an AMG engineer, who is responsible for the whole engine assembly process, including installing the crankshaft of the engine block, assembling the camshaft and compressor, and laying cables.
High-pressure fuel pump in fuel tank
SLR's high-performance engine draws fuel from two interconnected aluminum fuel tanks. Two fuel tanks are installed at relatively low positions on the left and right sides of the rear axle to keep the center of gravity as low as possible and further improve the dynamic maneuverability. The volume of the fuel tank is 97.6 liters, of which the standby fuel is 12 liters. The two fuel tanks are equipped with two integrated high-pressure fuel pumps, which are controlled by the engine management system to ensure that the oil supply matches the engine speed and load. In addition, the fuel tank also adopts a very effective solution specially developed for SLR: one fuel pump runs continuously and the other is started when necessary.
Four metal carrier catalytic converters effectively control emissions.
On the engine side, secondary air injection and dual ignition are necessary standards for low emissions. The complex exhaust system improves these standards: the double-sided staged double-headed system consists of a catalytic converter mounted on a diaphragm and a main catalytic converter covered with a special precious metal coating, both of which are located in the same housing. Precise metal design makes the wall thickness very thin, thus achieving very low exhaust back pressure. Due to the application of cutting-edge technology in engine management and emission control system, the 8-cylinder engine of the new SLR has reached the harsh limit of Euro IV standard and the current limit of the United States.
On both sides of the vehicle, the catalytic converter shell leads to the rear muffler behind the front wheel, and then to the stainless steel exhaust pipe with a diameter of 60 mm These side exhaust pipes further reflect the style of SLR racing cars in the 1950s, making the bottom surface of the vehicle smooth, which plays an important role in the first-class aerodynamic characteristics of the new SLR. The muffler was folded several times in the accurately calculated acoustic part, resulting in the shocking engine sound of the new SLR. The capacity of each muffler is 19.6 liters.
Manual transmission program reaches the match shift time.
High-performance sports cars also use the 5-speed automatic gearbox developed by Mercedes-Benz, which has been successfully applied to several extremely powerful models. After special optimization, the transmission can provide extremely high torque and allow the driver to choose different shift characteristics. The gearbox transmits the output power of the engine to the differential and the rear axle through a fine-tuned aluminum and steel drive train.
In order to highlight the sports driving experience, the transmission system developed by Mercedes -AMG can provide more functions for SLR. For example, the driver can decide whether to choose automatic transmission shift or manual shift. The driver can also select the shift speed, so as to determine the degree of motion characteristics of each gear. The rotary switch on the center console provides three setting options: manual, comfortable and sports. After the program is started, the letters "M", "C" or "S" will be displayed on the dashboard display.
"Comfort" and "Sport" are automatic shifting programs, and as the name implies, they focus on the comfortable or more sporty driving experience respectively. Exceptionally, in the "manual" mode, the driver can choose between five gears through the buttons on the steering wheel or the trigger function of the gear lever. After selecting "Manual", the driver can also choose a three-level shift program to further increase the sports driving experience.
Class I = "sports car"
Class II = "super sports car"
Class III = "Racing"
In addition, the response, reaction and closing time of automatic transmission coupling are getting shorter and shorter, thus greatly shortening the shift time.
Car body and safety: high-tech materials create excellent passenger safety protection performance.
Carbon fiber body and ceramic brake disc
Unparalleled rigidity and collision safety.
The successful crystallization of several years of material research.
Adaptive front passenger airbag and newly developed side airbag.
In terms of body and safety technology, the new Mercedes-Benz SLR McLaren once again embodies the innovative power in today's high-performance sports car field. High-tech materials in the field of aviation technology will be applied to production cars for the first time: the body made of carbon fiber has reached the low weight and extraordinary stiffness and strength that only F 1 racing cars had before; In addition, this new material also improves the level of collision safety.
In recent years, carbon fiber has played an important role in aviation industry. The rudder, vertical rudder, landing flap and other parts of most large passenger planes are made of this material. In the development and continuous application of this material, scientists from Daimler-Chrysler Research Center have made important contributions. Now, their professional knowledge and rich experience of Mercedes-Benz and McLaren experts in the field of racing design will be reflected in the production car for the first time: the body shell, door and hood of SLR are made of corrosion-resistant carbon fiber composite materials.
Carbon fiber members have the same strength as similar steel or aluminum members, but their weight is 50% lower than steel members and 30% lower than aluminum members. Therefore, carbon fiber composites are selected when manufacturing high-performance cars, because lower weight not only means lower fuel consumption, but also better converts power into speed. When accelerating and braking, the lower the weight, the more agile. Compared with the traditional steel structure of similar vehicles with front engine, the weight of the main structure of Mercedes-Benz SLR McLaren is reduced by about 30%, which is actually attributed to the wide application of carbon fiber composites.
Carbon fiber composites significantly improve energy absorption capacity.
In addition, the cutting-edge lightweight materials also have excellent energy absorption capacity. The energy absorption coefficient of carbon fiber composites is about 4-5 times higher than that of metal materials. For several years, F 1 Team has been making use of this feature to manufacture the collision buffer parts of its racing cars with carbon fiber composite materials, thus greatly reducing the serious injury accidents in this top-class automobile sport.
The single shell structure (also called passenger compartment) of the new Mercedes-Benz SLR McLaren is also made entirely of this high-tech material, which can provide passengers with a very reliable safety space in the event of a frontal, side or tail collision.
Carbon fiber collision buffer member in front-end structure
The new fiber composite material has safety advantages, especially in the front end structure of SLR fuselage shell. The two tapered carbon fiber members here are enough to absorb all the energy generated by the defined frontal collision, and the deceleration will not exceed the passenger's tolerance. Each tapered carbon fiber member is about 620 mm long and weighs only 3.4 kg. The carbon fiber composite beam is fixed on the aluminum structure suspended by the engine through bolts, and its front end is connected with the rest of the body shell structure through the carbon fiber composite beam and the horizontal sandwich plate. This makes SLR the world's first production car with a front-end impact bumper made of carbon fiber.
When a collision occurs, the fibers of the carbon fiber composite parts tear from front to back, absorbing the collision energy at a constant deceleration. Because carbon fiber has stable deformation characteristics, the energy absorption of carbon fiber longitudinal beam can be adjusted to meet specific requirements. For example, engineers set the continuously changing cross-sectional area of components for this purpose. This subtle adjustment means that the deceleration value not only produces predictable energy absorption characteristics, but also has a weight advantage, because this design only uses the actual amount of materials needed.
Development of carbon fiber composite longitudinal beam for 4 years
The two tapered longitudinal beams consist of a main body and an inner net. This basic structure is the most successful crystallization of this SLR module in four years' research and development. The senior design department of Mercedes-Benz Technology Center in Schindler-Fingen and the engineers of Daimler-Chrysler not only aim to develop unprecedented passive safety, extraordinary rigidity, strength and the lightest longitudinal beam as possible, but also formulate a highly automated manufacturing concept, so as to realize mass production. In this way, the experts entered the unknown field of science and technology.
In the early development stage, they successfully applied a specially formulated algorithm to calculate the dynamic collision of carbon fiber composites for the first time. When optimizing the design of the longitudinal beam of the front-end collision buffer structure, it is of great significance to carry out computer simulation.
At the same time, the material experts let the model accept the precisely defined pressure in the impact test to check the calculation results in practical application. In this process, material experts gradually determined that the carbon fiber composite longitudinal beam in the new SLR front-end structure has excellent deceleration and deformation characteristics.
The first automatic production of carbon fiber composite parts
Up to now, carbon fiber composite parts in racing and aerospace industries have been manufactured by hand, which is time-consuming. For Mercedes engineers, the challenge is to use their experience in this field to develop mass production automation methods. To this end, they divided the manufacturing process into different stages, first producing prefabricated parts, and then filling and curing them with resin.
In order to achieve a high degree of automation in the production process of preforms (preforms are also made of carbon fibers), Mercedes' material experts learn from and adopt the traditional methods of textile industry to process high-performance carbon fibers, such as sewing, knitting, weaving and knitting.
For example, the grid of SLR longitudinal beam is made of several layers of carbon fiber overlapping each other and sewn by machine. After the net is cut and shaped and the ends are folded to form a double T-shape, the net blank is embedded in the polystyrene braided core. Then, the woven core was put into a special knitting machine, and 25,000 extremely fine carbon wires were woven into a longitudinal beam, which was unwound from 48 reels at the same time. This technology enables fiber materials to be woven around the braided core at an accurately calculated angle, thus forming the required contour. According to the required thickness, several layers overlap each other smoothly in specific areas. At the same time, an innovative method was developed for this process.
In the further manufacturing process, the computer-controlled tufting machine connects the inner net to the fabric of the longitudinal beam. Remove the braided core and cut the preform of the longitudinal beam to the appropriate size. Then, the preform is filled with resin. Several patented solutions must be developed and tested to ensure the short cycle and high repeatability of the manufacturing process, which is the key feature of mass production. It takes only 12 minutes to manufacture the complex fiber structure of the longitudinal beam by knitting machine, which shows some potential of this new manufacturing technology.
New method of manufacturing rear window sill
In the process of carbon fiber processing, the rear window sill of the new SLR is another example of Mercedes-Benz adopting new production technology. The shape of the back window sill plate is very complicated, with several holes, which must be automatically processed into a single piece. For this reason, Mercedes-Benz and its partners have created "Advanced SMC" on the basis of SMC method. Its advantage is that carbon fiber winding is no longer made by hand, but by machine.
The "advanced SMC" method uses an operating system to determine the position of each carbon fiber composite layer corresponding to the shape of the main body of the part at a pre-calculated angle and at a pre-set position, thereby manufacturing a blank. Then, the blank is heated and pressed to form the accurately calculated shape of the back sill. So there is no need for subsequent repetitive work. In the new SLR, Mercedes-Benz took the lead in applying the parts manufactured by the "advanced SMC" method.
British McLaren Composite Materials Company has also manufactured more than 50 kinds of carbon fiber and glass fiber components for high-performance sports cars, and also adopted and improved the common technological processes in the aviation industry. The manufacturing of body shell is highly integrated, for example, the whole floor assembly including all supporting parts and locking parts is connected into a whole. Before resin spraying, the cavity of carbon fiber composite roof skeleton structure (also integral) is automatically filled with foam, which constitutes a sandwich structure with special collision resistance. The high-strength welding and riveting process ensures the reliable connection between the chassis and the carbon fiber components on the body shell. The aluminum engine bracket is bolted to the carbon fiber composite partition. The carbon fiber structure includes the integral metal connection point of aluminum and steel rear axle.
The restraint system includes adaptive airbag, side airbag and knee airbag.
The cutting-edge restraint system includes six airbags, seat belt tightener and seat belt force limiter, which constitutes the precise safety concept of the new SLR.
When a frontal collision occurs to a certain extent, the electronic control module first triggers the high-performance seat belt tensioner, and tightens the slack seat belt by 15cm in a few tenths of a second, thus reducing the forward displacement of passengers caused by the collision. Mercedes-Benz SLR McLaren is also equipped with knee airbags, which cooperate with two-stage front airbags to provide a wide protective air cushion for drivers and front passengers, thus strengthening the role of seat belts and seat belt tensioners.
The front sensor quickly deploys the airbag.
When a rollover is detected, the seat belt pretensioner will also be activated. The rollover sensor located in the middle passage of the passenger compartment can reliably identify this accident and quickly provide its data to the central control module of the suppression system.
The cutting-edge sensor can also adaptively control the front airbag, so that the airbag can be deployed according to the severity of the accident. When the sensor indicates a slight frontal collision, only one air cavity of the two-stage gas generator is triggered, and the internal pressure of the 64-liter driver airbag and the 125-liter front passenger airbag is low. If the sensor indicates a serious accident, the electronic system will also trigger the second gas chamber of the gas generator, at which time the pressure of the airbag is higher. Two front-end sensors are located on the radiator beam, which also helps to restrain the adaptive deployment of the system. These sensors are installed in the exposed position of the front-end structure, which can detect the severity of the collision more timely and accurately. The airbag deployment algorithm uses the signal from the front sensor and the signal from the frontal collision sensor in the middle passage of the passenger compartment.
When passengers are safely trapped in airbags, the seat belt tension limiter will reduce the tension of the upper body seat belt, thus further reducing the risk of minor injuries to the chest and shoulders.
Side airbags provide extra protection for the head.
In the event of a side collision, the integrated side airbag in the door optimizes the protection function. These airbags can protect the head and chest, so they are sometimes called "head/chest airbags". In the case of a side collision, this special side airbag can be deployed at the tear above the armrest and inflated into an asymmetric airbag within a few milliseconds, and its upper end is higher than that of the ordinary airbag after inflation. This design means that the airbag can reduce the risk of head hitting the side window or intruder, and at the same time, it can block glass fragments or other objects that may enter the car.
The automatic identification device for children's seats developed by Mercedes-Benz is also one of the standard devices of SLR. When the front passenger seat is equipped with a special child seat approved by Mercedes-Benz, the automatic child seat identification device can passivate the front passenger airbag. These children's seats are equipped with transponders, which can receive and respond to signals from two antennas in the seat cover. After data exchange, the airbag electronic system can recognize that the child seat is installed on the front passenger seat and passivate the airbag on the front passenger seat, because it is not necessary to deploy the airbag in these cases. At this time, the seat belt pretensioner and side airbag can still be activated, providing extra protection for small passengers in the event of an accident.
Gull wing door with door opening angle
The new high-performance sports car draws lessons from and adopts the gull-wing door, the most remarkable feature of Uhlenhaut coupe (1955 sports car version of SLR legendary racing car). However, the door of the new SLR is attached to the front pillar of the roof, not hinged on the roof, and can be rotated forward and upward 107 degrees. This new concept ensures higher safety, eye-catching appearance, and the angle of the door hole allows the driver and front passengers to enter and exit comfortably.
The luggage capacity of high-performance sports cars is also noticeable. The suitcase is made of leather and velvet, with a total capacity of 272 liters (measured by VDA). Through the trap door below, you can easily access the scrubber, brake fluid storage tank, battery and tools in the cargo hold. In order to realize the weight distribution of the sports car and the low center of gravity close to the center of the vehicle, the designer chose this unique layout.
Suspension: Excellent performance on track and road.
Aluminum double wishbone suspension and 18 inch wheels.
High performance brake disc made of carbon fiber reinforced ceramics
Electronic induction braking system (SBC? ) and electronically controlled vehicle stable driving system (ESP? )
Adaptive air resistance disc brake for trunk lid
Mercedes-Benz SLR McLaren combines cutting-edge racing technology, high-performance control system and the most advanced materials, and has made unparalleled achievements in agility, active safety and comfort, setting a new standard for the dynamic performance of sports cars. SLR suspension can meet the requirements of smart drivers for Mercedes-Benz high-performance sports cars.
The axle of SLR is marked with the signature of racing development experts, and the front and rear axles are suspended by double wishbones. Because the position of the strut is relatively low, when the spring compresses and turns at high speed, the wheel can produce negative camber, thus ensuring the maximum contact area between the tire and the road surface under any circumstances. At the same time, the vehicle-bridge technology can prevent the front end from diving when the vehicle brakes suddenly and the rear end from diving when accelerating.
Aluminum is the key material for suspension developers of the new Mercedes-Benz SLR McLaren. The fork rod is made of forged aluminum, and the wheel bracket is made of cast aluminum. Compared with the traditional steel design, aluminum material not only has many advantages, but also its lightweight characteristics significantly improve the response speed and agility of suspension.
The relatively long wheelbase (2700 mm) also helps to improve the excellent handling of the SLR and greatly improve the directional stability. At the same time, the large tread and low center of gravity make the turning speed higher. The spring/damping device combination of the front and rear axles and the front stabilizer bar further improve the suspension structure. The stabilizer bar is located on the front axle and is controlled by the rocker arm like the F 1 racing car. This means that it will not occupy any installation space, thus avoiding damaging the smooth lines on the underbody. This is the key factor of excellent aerodynamic characteristics of sports cars.
The rack-and-pinion speed-sensitive power steering system also conforms to the concept of intelligent lightweight. Compared with other steering systems, this design greatly reduces the weight. Because the steering system is installed at a low position in front of the engine, and the speed ratio is 12.6, the steering system can directly respond to the driver's instructions and execute it very accurately. ......