CDC full name of the Continuous Damping Control, which means continuous damping control systems, Buick called full-time active hydraulic damping system stability, but this technology is not universal chassis developed its own technology, but from Germany the well-known manufacturer ZF Sachs, the company is the well-known wholly owned subsidiary of ZF driveline and chassis technology companies in Germany, the new BMW 7 Series uses 8-speed automatic transmission comes from ZF. ZF Sachs and ZF’s also been a century of history (since 1895), the main production powertrain, the clutch and shock absorber products, it set up a branch in Shanghai, China and set up three wholly owned and joint ventures, production the torque converter, the shock absorber parts, clutches, and other products.
1.CDC the noun
CDC full name Continuous Damping Control, meaning a continuous damping control system, referred to as full-time Buick hydraulic damping active stabilization system, but this technology is not universal chassis developed its own technology, but well-known manufacturers from Germany’s ZF Sachs, this company is well-known wholly owned subsidiary of ZF driveline and chassis technology companies in Germany, the new BMW 7 Series uses 8-speed automatic transmission comes from ZF. ZF Sachs and ZF’s also been a century of history (since 1895), the main production powertrain, the clutch and shock absorber products, it set up a branch in Shanghai, China and set up three wholly owned and joint ventures, production the torque converter, the shock absorber parts, clutches, and other products.
2.CDC system consisting of
CDC core component system by the central control unit, CDC shock absorbers, vehicle body acceleration sensor, an acceleration sensor and a wheel CDC control valve. Working Principle
3.CDC system
is based on the traditional liquid damperThe force damper structure, marked with the damper fluid, both internal and external chambers, the oil can flow through the pores of the link between the two chambers in the wheel bumps, the piston in the damper will moves up and down, its cavity under the action of the oil will reciprocate piston reciprocating flow between the two chambers within the sleeve. Fluid friction between the hole wall and the friction between the oil molecules resistance to movement of the piston, the vibration kinetic energy into heat, which is released into the air through the damper housing, thus achieving the damper the “shock absorption” process, the system is an issue in the CDC, “pores”, between the two chambers through the valve electronically controlled to vary the cross sectional area of the communication portion, when a certain flow rate, the fluid resistance is the size of the cross-sectional area inversely, thus changing the resistance between the fluid chamber reciprocates, thereby affecting a change to the shock absorber damping.
CDC system of an acceleration sensor according to the vehicle body on the vehicle, data determining the vehicle sensor wheel acceleration sensor, and a lateral acceleration sensor, a running state, the unit ECU by the central control calculates, and then issue the appropriate command to the ECU on the CDC damper control valve, the control valve opening adapted to provide a damping current state.
In actual driving, CDC in the face bumpy roads can greatly weaken the rebound from the shock and spring road, so that the body remains stable, from theory speaking state, the CDC can do severe jitter up and down in the wheel when the vehicle body only as sea sailing ships up and down. In the intense driving time and can improve the suspension damping to provide adequate support, and more responsive chassis to improve handling of the vehicle. ZF Sachs is also mentioned in the introduction of the CDC, the CDC using the system of the vehicle than the vehicle without the system has a shorter braking distance. The CDC’s application is not limited to cars, ZF Sachs has CDC system products for large passenger cars, trucks and other commercial vehicles, for passenger comfort and safety of goods have provided better protection.
Statistics show that, for the CDC system ZF Sachs car reading the data in the traveling vehicle can be 1 millisecond, and complete the adjustment of the shock absorber in the same short time. That is, in theory, the operating frequency of the systemUp to 1000 times per second.