What is the automobile suspension system?

The suspension system is located between the wheels and the vehicle body, with the wheels connected at the bottom and the vehicle body connected at the top, playing the role of connecting the upper and lower parts and absorbing shock and buffering. The suspension system between the wheels and the vehicle body will automatically compress and straighten to help buffer and prevent rebound, so that the vehicle body can be kept as horizontal as possible, which can greatly improve driving comfort. Common suspension systems on the market are divided into independent suspension, non-independent suspension and semi-independent suspension. The left and right wheels are installed on the same rigid crossbeam, forming a whole. When the right wheel encounters an obstacle and jumps, the left wheel will also jump. This is a non-independent suspension. This type of suspension is simple, reliable and low in cost, but because the two wheels are fixed together, when one wheel is impacted by the road surface, the other wheel will also be affected, so the comfort of the non-independent suspension is poor. It is now mainly used in trucks, buses and some SUV models.

Independent suspension, the two wheels are connected to the body through movable control arms, they can move independently without interfering with each other, so when one wheel is impacted and bounced by the road, it will not affect the other wheel, so the stability of the independent suspension system will be better, and it can absorb the vibration and impact of the road, so its driving comfort will be higher, and at the same time, because the independent suspension system removes the middle rigid axle, it frees up more space, so its cabin space will be larger. At present, the McPherson suspension system is widely used on the market.

The semi-independent suspension system improves the middle rigid beam on the basis of the non-independent suspension system, so that the original rigid beam becomes a torsion beam with a certain elasticity. The torsion beam can withstand a certain degree of deformation. When the right wheel is impacted and bounced, part of the impact force will be consumed by the deformation of the torsion beam, so the left wheel will be affected less, which plays a role in lateral stability. This semi-independent suspension system is what we often call the torsion beam suspension system. Its stability and comfort are generally used in the rear suspension of mid-range cars.

Why can AT transmission shift automatically?

The core logic of AT transmission automatic shifting is that it has a transmission control module. AT transmission consists of three parts: torque converter, transmission control module and speed change mechanism. The torque converter is a power component, which is responsible for flexibly transmitting the power of the engine to the transmission. Since it relies on the hydraulic oil filled inside to transmit power, when the brake wheel stops rotating, the drag force will not be fed back to the engine, and the engine will not be stalled.

The transmission control module is the core of the AT transmission, which can automatically identify and automatically send shift instructions. The controller control module is located at the bottom of the gearbox. It consists of a large number of integrated circuits and oil channels. When it collects engine speed information, the opening information of the driver’s accelerator pedal and the current vehicle speed information, it can identify the driver’s operating intention to decide whether to shift up or down, and then control the locking of the clutch plate in the speed change mechanism by adjusting the pressure of the oil in the oil channel in the shift valve body, and finally realize the shifting and speed change through the planetary gear. Among them, each of the densely packed oil channels has its specific function. For example, the clutch plate can be pressed to close by the pressure of the oil in the oil channel. By locking and releasing these clutches, different combinations of planetary gears can be realized and different speeds can be output, thus realizing the automatic switching of different gears.

The speed change mechanism in the transmission is commonly known as the planetary gear and multi-plate clutch plate. The planetary gear set is responsible for completing the conversion of different transmission ratios. The multi-plate clutch plate is responsible for locking and releasing the engagement of different mechanisms in the planetary gear set. The gear combinations of different planetary sets are also different, and the speeds obtained are also different. The speed change mechanism is a specific command executor. They are only responsible for switching the corresponding gear and outputting the corresponding speed. They do not have their own thinking and consciousness and do not have automatic control capabilities.

Why do we need Brake Pad Wear Sensor?

1. Improved safety: By monitoring the wear degree of the brake pad in real time, the Brake Pad Wear Sensor can ensure that enough braking force is provided at critical moments, thus improving the safety of driving.
2. Prevent accidents: If the driver fails to detect the condition of the brake pad is too thin in time, it may lead to the loss of control of the vehicle or the increase of braking distance, and then cause traffic accidents. With the warning function of the Brake Pad Wear Sensor, this kind of risk can be greatly reduced.
3. Extended service life of the brake system: timely replacement of the brake pad not only ensures the safety of driving, but also helps to extend the overall service life of the brake system and save maintenance costs.

What is the Brake Pad Wear Sensor?

The Pad Wear Sensor is a device used to monitor the wear degree of brake pads. When the thickness of the brake pad is lower than a preset value, the sensor will send a signal to the vehicle’s electronic control system to remind the driver to replace the brake pad in time, so as to avoid the safety hazards caused.