Bosch uses the Vehicle Dynamics Management System (VDM) to network the Electronic Stability Program (ESP) with other active vehicle systems that affect vehicle driving performance. This innovative network system enables ESP, active steering, active chassis and power systems to communicate with each other. This kind of mutual communication between different systems can provide better help for the driver, further improve the stability, safety and power of the driving, and make the driving pleasure to the extreme.
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VDM system improves driving stability and safety
VDM system integrates ESP, active steering system, active chassis system and power system to further improve driving stability, safety and power
The VDM system utilizes existing sensors, control units, actuators, and centralized coordinated actions to properly implement new accessibility functions based on different conditions. Mr. Herbert Heming, vice president of sales for Bosch Chassis Control Systems, said: "With VDM systems integrating different systems, we can fully utilize the enormous potential of advanced driving dynamics systems for the first time."
Always maintain good tracking by coordinating braking and steering
Two steering support systems developed by Bosch with VDM systems have served the market – Dynamic Steering Angle Control (DSA) and Dynamic Steering Torque Control (DST). The DSA is able to actively control the steering angle of the wheel, while the DST is used for electric power steering vehicles.
The DSA can independently increase or decrease the angle of the front wheel steering of the vehicle. For example, when the driver makes a tail change condition in a fast lane change vehicle, the DSA automatically reduces the steering angle of the front wheel, thereby avoiding the vehicle side slip at an early stage. Often, such rapid, minimal adjustments occur without the driver grasping the steering wheel, but it ensures that the vehicle is moving in the correct direction of travel. If the slippage continues to increase, the ESP will brake the appropriate wheels individually to ensure complete vehicle stability. This optimized coordinated steering and braking function greatly enhances vehicle stability and flexibility. For example, in order to remain stable during the avoidance operation, the ESP must reduce the speed to a lower level than the current solution.
DST is also connected to the ESP system. Unlike the automatic correction of the steering angle by the front wheels, this function helps the driver to control the vehicle with optimal driving steering in critical driving situations. This feature helps the driver instinctively find the best steering angle by increasing or decreasing the role of the electronic power steering system.
The DSA and DST functions further reduce the braking distance, and their unique value and function can be fully demonstrated in dangerous situations, such as when braking is required. This division of labor provides additional benefits, especially when the tires on both sides of the vehicle are on dry and slippery surfaces. While the steering system prevents the vehicle from slipping, the brake system can be fully used for vehicle deceleration and can achieve greater braking force. It can reduce the braking distance by 10% compared to ESP-equipped vehicles.
Dynamic driving style: brake system, chassis system and power system work together
Bosch has also developed VDM system functions based on ESP connections for chassis systems and power systems. At present, the semi-active damper can be used to reduce the front and rear and left and right swings during full braking and improve the braking distance by equalizing the wheel load. In the future, when the vehicle makes a sharp turn, people will be able to use the active anti-rollover stability system to use the information stored in the ESP to achieve the vehicle's autonomous steering. Since the vehicle will be able to respond more appropriately to the driver's actions, the VDM function will increase the stability of the vehicle and ensure the dynamic performance of the vehicle during driving.
In order to improve the driving dynamics of the vehicle in the curve, ESP data has been used to adjust the steering torque. The dynamic wheel torque control (DWT) function in the VDM can reduce the torque of the inner wheel while increasing the torque of the outer wheel, which enables the vehicle The steering is more sensitive and the turning radius is smaller, which not only increases the flexibility of driving, but also enhances the driving pleasure. To this end, Bosch has developed two technical solutions. One of them is based on the activation of a special distribution gear, which can arbitrarily distribute the driving torque of the car, so that the vehicle has better acceleration on the ground with different friction coefficient, such as on a dry, half-smooth ground. Now, with Bosch launching the newly developed ESP Extreme Edition, a technically simpler, more economical version of DWT has emerged. The right engine control program has been linked to the new and current state-of-the-art ESP version, providing flexible and convenient brake pressure control, enabling the vehicle to achieve similar flexibility without the need to install active distribution gears.
Floating Ball Level Controller
The floating ball liquid level controller is composed of floating ball, plug rod, etc. It is installed on the top of the container through the connecting flange, and the floating ball floats on the liquid level according to the principle of equal volume of liquid. When the liquid level of the container changes, the floating ball also moves up and down. Due to the magnetic effect, the dry spring of the floating ball liquid level controller is magnetically attracted to change the liquid level position into an electrical signal, and the actual position of the liquid is digitally displayed through the display instrument, Floating ball liquid level controller to achieve remote detection and control of liquid level.
The floating ball liquid level controller is designed according to Archimedes' buoyancy principle. When the liquid level of the container changes, the floating ball also moves up and down. Due to the magnetic effect, the dry reed of the floating ball liquid level controller is magnetically attracted, so that the resistance in the sensor changes linearly, and then the converter converts the change of the resistance value into 4mA ~ 20mA standard DC signal output, Realize the remote detection and control of liquid level.
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Taizhou Jiabo Instrument Technology Co., Ltd. , https://www.taizhoujiabo.com