Bmw 1 series
Born on UKL platform, the layout was changed to precursor, the front suspension was McPherson independent suspension, and the rear suspension was multi-link independent suspension, with the minimum ground clearance of 140mm.
Driving experience
BMW, which has always emphasized the rear drive, now uses the front drive in the 1 series. Whether the driving experience will get worse is a concern of many people. In fact, the front drive of BMW 1 series does not feel any obvious difference from the previous rear drive, and the steering accuracy and directional directivity are very good.
Front suspension
Domestic BMW 1 series adopts a very standard McPherson-style front suspension, the claw is made of aluminum alloy, and the lower arm is made of double-layer stamped steel plate, so the strength is not much problem. In contrast, the imported 1 series adopts aluminum alloy double ball suspension, which has better adjustability. Of course, domestic production is to save costs, and it is understandable.
subframe
The 1 series subframe is a semi-frame structure, which is also commonly known as an ingot beam, and is made of double-layer stamped steel plates. But the two ends of the subframe are also connected with an aluminum alloy by screws, which extends to the front water tank frame, so this is actually a full-frame subframe.
The full-frame subframe can increase the strength of the front of the car and disperse the impact force to the chassis in case of collision, thus ensuring the integrity of the passenger compartment. In order to reduce the weight, the front frame is made of aluminum alloy.
Rear suspension
The rear suspension of BMW 1 series adopts multi-link rear suspension, and its structure is not complicated, and it is made of steel instead of aluminum alloy. Multi-link suspension can ensure vehicle comfort and improve vehicle handling.
Chassis whole
Looking at the whole chassis of BMW 1 series, there is a large area of fender covering, and the lower fender of the engine is steel plate, which can play a better protection role. The fender of the chassis is soft glass fiber, and there is a layer of sound insulation cotton on the inside of the fender, so the NVH level of BMW 1 series will be better. The entire exhaust pipe is covered with a complete heat insulation tile, which can effectively prevent heat from entering the car.
Bmw 1 series anti-collision beam
The front anti-collision beam is made of aluminum alloy with pedestrian protection foam on it, and the energy-absorbing box is also made of aluminum alloy, but there are no holes and folds; The rear impact beam is a single-layer stamped steel plate. Although it is a detachable structure, there is no energy-absorbing box.
Front collision beam
The front bumper of BMW 1 series is millimeter thick, with both sides extending below the headlights, covering more than 80%, which can cope with frontal collision experiments at various angles. However, there is no energy absorption mechanism on both sides of the anti-collision beam, and the yield strength of aluminum alloy should be intentionally used instead of energy absorption.
There is a thin aluminum alloy beam under the anti-collision beam, which is used to place pedestrians trapped under the car. With so many aluminum alloy materials, it can be seen that BMW 1 series has done a lot of weight loss in these front parts after being changed into a predecessor.
Rear impact beam
The rear bumper of BMW 1 series is much simpler than the front bumper. It is a thermoformed steel plate with a thickness of only a few millimeters. There are no energy-absorbing boxes at both ends, which is a bit suspicious of cutting corners.
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