机电一体化设计外文翻译--特种车辆制动系统改进设计(编辑修改稿)

机电一体化设计外文翻译--特种车辆制动系统改进设计(编辑修改稿)内容摘要：

system through its paces on the slick ice of Lake Hornavan near Arjeplog, Sweden. Work is currently under way to adapt the technology to buses and large trucks, to avoid jackknifing, for example. Stability control systems will first appear in mid1995 on some European SClass models and will reach the . market during the 1996 model year (November 1995 introduction). It will be available as a $750 option on Mercedes models with V8 engines, and the following year it will be a $2400 option on sixcylinder $1650 of the latter price is for the traction control system, a prerequisite for stability control. Bosch is not alone in developing such a safety system. ITT Automotive of Auburn Hills, Mich., introduced its Automotive Stability Management System (ASMS) in January at the 1995 North American International Auto Show in Detroit. ASMS is a quantum leap in the evolution of antilock brake systems, bining the best attributes of ABS and traction control into a total vehicle dynamics management system, said Timothy D. Leuliette, ITT Automotive39。 s president and chief executive officer. ASMS monitors what the vehicle controls indicate should be happening, pares that to what is actually happening, then works to pensate for the difference, said Johannes Graber, ASMS program manager at ITT Automotive Europe. ITT39。 s system should begin appearing on vehicles worldwide near the end of the decade, according to Tom Mathues, director of 7 engineering of Brake amp。 Chassis Systems at ITT Automotive North America. Company engineers are now adapting the system to specific car models from six original equipment manufacturers. A lesssophisticated and lesseffective Bosch stability control system already appears on the 1995 750iL and 850Ci V12 models from Munichbased BMW AG. The BMW Dynamic Stability Control (DSC) system uses the same wheelspeed sensors as traction control and standard antilock brake (ABS) systems to recognize conditions that can destabilize a vehicle in curves and corners. To detect such potentially dangerous cornering situations, DSC measures differences in rotational speed between the two front wheels. The DSC system also adds a sensor for steering angle, Utilizes an existing one for vehicle velocity, and introduces its own software control elements in the over allantilockbrake/tractioncontrol/stabilitycontrol system. The new Bosch and ITT Automotive stability control systems benefit from advanced technology developed for the aerospace industry. Just as in a supersonic fighter, the automotive stability control units use a sensorbased puter system to mediate between the human controller and the environment in this case, the interface between tire and road. In addition, the system is built around a gyroscopelike sensor design used for missile guidance. BEYOND ABS AND TRACTION CONTROL Stability control is the logical extension of ABS and traction control, according to a Society of Automotive Engineers paper written by van Zanten and Bosch colleagues Rainer Erhardt and Georg Pfaff. Whereas ABS intervenes when wheel lock is imminent during braking, and traction control prevents wheel slippage when accelerating, stability control operates independently of the driver39。 s actions even when the car is freerolling. Depending on the particular driving situation, the system may activate an individual wheel brake or any bination of the four and adjust engine torque, stabilizing the car and severely reducing the danger of an uncontrolled skid. The new systems control the motion not only during full braking but also during partial braking, coasting, acceleration, and engine drag on the driven wheels, circumstances well beyond what ABS and traction control can handle. The idea behind the three active safety systems is the same: One wheel locking or slipping significantly decreases directional stability or makes steering a vehicle more difficult. If a car must brake on a lowfriction surface, locking its wheels should be avoided to maintain stability and steerability. 8 Whereas ABS and traction control prevent undesired longitudinal slip, stability control reduces loss of lateral stabili。