Periscope front suspension mechanism has inherent disadvantages.
Disadvantages of 0 1 periscope type
When it comes to improvement, we have to start with shortcomings. The commonly used periscope shock absorber absorbs the ups and downs from the road surface through the up-and-down telescopic operation when the vehicle is running, and achieves the effect of stabilizing the shock absorption of the vehicle body, but at the same time it needs to bear the lateral and longitudinal forces generated when the vehicle turns or brakes. Although the inverted fork can provide better rigidity here, it will actually cause different degrees of resistance to the smooth operation of the front fork.
Periscope suspension also needs to bear the lateral and longitudinal forces generated when the vehicle turns or brakes.
The front fork has to bear many forces.
02 Hozak? Front suspension system
The Scottish inventor Norman was the first to attack? Norman Hozak, who is good at creativity? Hoska I like to break away from convention and find new ways to solve problems. In the1970s, I published the HOSSACK front suspension system, which consists of two groups of A-arms, a single shock absorber and an inverted Y-arm. This seemingly complicated mechanism can improve the shortcomings of periscope suspension system. BMW's patented Duelever front suspension is one of HOSSACK front suspensions.
Norman? Hossack
In fact, the structure of the front suspension system of HOSSACK is similar to the double A-arms of a car. Its main function is to make the operation of the shock absorber simple and not affected by other forces that are not parallel to its operation direction. At the same time, the functions of "steering" and "damping" are separated. When the vehicle brakes due to inertia, the frame will drive the double A-arms to press down together, and the shock absorber will be compressed by the lower A-arms. When the brake is released, the shock absorber will rebound and drive the A-arm to lift the car body.
Hozak suspension structure.
When the vehicle turns, the steering link is pushed by the handle, and then the inverted Y arm connected with the steering link is driven. Of course, in the process of turning, we will not exert any force and influence on the double A-arms, and skillfully operate "steering" and "damping" independently. The appearance of HOSSACK front suspension mechanism can be said to have a great influence on the development of locomotive front suspension system later. The suspension system of some of its cars is also derived from HOSSACK.
Hoska The front suspension system can independently operate the two functions of "steering" and "damping".
03 lifting rod? Front suspension system
BMW? Madard? Similarly, in order to improve the inherent problems of periscope suspension, the suspension will not change the angle with the frame when the vehicle is in shock absorption operation, thus achieving an ideal suspension setting. Telelever (remote control lever front rocker arm system) was developed by 1993 for its R series horizontal engine. This front suspension system is connected to the front wheel by a shock absorber through a connecting rod to drive the front wheel to rotate. It is not responsible for the damping operation itself. Its main purpose is not only to reduce the unsprung weight, but also to eliminate the change of traction force of the front fork during braking, thus improving the comfort and stability of the vehicle.
Remote control suspension mechanism.
BMW? R 1200GS adopts telescopic front suspension system.
Double-lever front suspension system
With the support of suspension technology of BMW Automobile Factory, BMW? Motorrad further modified the Telelever suspension system, and found that the double-bar suspension system was completely separated from the steering system, which not only maintained the original comfort, but also increased the torsion resistance of the suspension, and at the same time transferred the extrusion force generated during braking to the frame to share. In contrast, the double lever suspension system can provide more road feeling feedback for the knight. However, these replaceable suspension systems were inspired by Hozak.
Double lever suspension mechanism
The connecting rod connects the handle and the aluminum alloy arm.
05Tesi suspension system
Tesi suspension system is also designed to improve the instability of the vehicle, because the front fork of the traditional periscope needs to bear a force that is not parallel to the shock absorption stroke when braking, and the front inclination angle and front wheel drag distance are reduced due to the compression of the front fork. The front fork is changed to rocker arm design, and the wheel hub steering is adopted. The steering of the faucet is connected to the front wheel hub through the connecting rod, and the front wheel hub will be much larger than the ordinary car in order to put the steering mechanism. In fact, when the Tesi suspension system is braked, although the front of the vehicle will sink, the rake angle and front wheel drag will increase, making the vehicle more stable when cornering.
Tesi suspension structure
Through the wheel hub steering, the front wheel hub will be much larger than the average car.
The vehicle steering is connected to the front hub through a connecting rod via a faucet.
Honda Golden Wing Double Beam Front Suspension System
Honda 20 18 gold wing adopts double-beam front suspension (also called double A-arm suspension). If you want to explain the advantages of double-beam suspension system in one sentence, it is that the suspension mechanism and shock absorber are separated. The traditional front fork will affect the operation when it is stressed. When the Golden Wing decelerates, the front fork will bear the weight of the whole vehicle, further affecting the performance of the front fork.
The suspension of double wishbone mechanism is one of the most attractive highlights of the new generation of Golden Wing.
The double-beam front suspension system separates the suspension mechanism from the shock absorber, and the setting characteristics of the shock absorber will not change because of the force on the mechanism. When riding the golden wing, from the knight's point of view, we can see that the suspension mechanism keeps running because of the road conditions, and the car body walks smoothly because of the fierce swing of the suspension. In the case of severe deceleration, the double-beam suspension can also provide better dive prevention characteristics, and will not feel the common large-area nodding phenomenon of the traditional front fork. On the contrary, there is a sense of stability that the car body sinks synchronously, which is reassuring.
As can be seen from the figure, the front wheel plays a role when using the new front suspension and the traditional front suspension for braking. When the new front suspension brakes, the front wheels are directly upward (red), and the traditional front suspension is retracted (green), which leads to obvious changes in the wheelbase.
07RADD suspension system
Of course, there is a suspension mechanism of front rocker arm, and naturally there will be a suspension system of "front single rocker arm". This system, called RADD, was developed by American engineer James? Parker's invention has developed to the third generation, which first appeared in Yamaha in 1993. GTS 1000, the third generation will be in 2006? In 2008, GSX-R 1000 was revised. Compared with Tesi system, the design is much simpler, and the front wheel does not need special size, which can reduce the unsprung weight. When matched with carbon fiber fuel tank, it can reduce the vehicle weight 10kg and make the vehicle center of gravity more concentrated. The heavier you brake, the lower the car body will fall, which is more conducive to the stability of the car body and replaces the periscope to hang the heavy brake.
GTS 1000？ Adopt RADD? Front single rocker suspension system.
Samuel? Kao refit factory JSK refitted GTS 1000 in America.
After the fairing is removed, the system structure of RADD can be seen more clearly.
Will it be in 2006? GSX-R 1000？ Go to RADD instead? Front suspension system.
RADD？ The system can effectively reduce the unsprung weight, make the center of gravity more concentrated, and is beneficial to the knight's angle of attack.
08 aircraft front wheel single gun suspension system
However, when it comes to "front single rocker arm", the most famous one is VESPA's "aircraft front wheel single gun suspension system". VESPA from Italy is not only pleasing in appearance, but also has some ink marks on handling and driving comfort, which originated from TLAD(Trailing? Link? & amp？ Anti? Diving? Anti-dive technology is the core of single rocker arm in front of VESPA. Having said so many jargon, the ultimate goal is actually to reduce the situation that the vehicle nods when braking heavily.
The single rocker front suspension design, which can give consideration to both appearance and driving comfort, is a unique trademark of VESPA.
No matter what kind of suspension system has a leader, it also brings a different driving experience to the knight. Of course, apart from knowing that different suspension mechanisms, whether they are first-class suspension or top suspension, still need to be adjusted to maximize the benefits, otherwise it will be just a decoration at best.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.