畢業(yè)設(shè)計(jì)外文翻譯---汽車的轉(zhuǎn)向控制-汽車設(shè)計(jì)-文庫吧資料
2025-01-27 04:17本頁面
【正文】 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. Whereas ABS and traction control prevent undesired longitudinal slip, stability control reduces loss of lateral stability. If the lateral forces of a moving vehicle are no longer adequate at one or more wheels, the vehicle may lose stability, particularly in curves. What the drive?逾 ?半 ?? ?? ??? fishtailing is primarily a turning or spinning around the vehicle39。s system should begin appearing on vehicles worldwide near the end of the decade, according to Tom Mathues, director of engineering of Brake amp。s group and a team of engineers from MercedesBenz, led by project manager Armin Muller, developed the first fully effective stability control system, which regulates engine torque and wheel brake pressures using traction control ponents to minimize the difference between the desired and actual motion. Automotive safety experts believe that stability control systems will reduce the number of accidents, or at least the severity of damage. Safety statistics say that most of the deadly accidents in which a single car spins out (accounting for four percent of all deadly collisions) could be avoided using the new technology. The additional cost of the new systems are on the order of the increasingly popular antilock brake/traction control units now available for cars. The debut of stability control technology took place in Europe on the MercedesBenz S600 coupe this spring. Developed jointly during the past few years by Robert Bosch GmbH and MercedesBenz AG, both of Stuttgart, Germany, Vehicle Dynamics Control (VDC). in Bosch terminology, or the Electronic Stability Program (ESP), as Mercedes calls it, maintains vehicle stability in most driving situations. Bosch developed the system, and MercedesBenz integrated it into the vehicle. Mercedes engineers used the stateoftheart DaimlerBenz virtualreality driving simulator in Berlin to evaluate the system under extreme conditions, such as strong crosswinds. They then put the 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 鉣 俕 嶏 ?? ? ?$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 desired motion from the steering angle, the accelerator pedal position, and the brake pressure while determining the vehicle39。 附件： Spin control for cars Stability control systems are the latest in a string of technologies focusing on improved diriving safety. Such systems detect the initial phases of a skid and restore directional control in 40 milliseconds, seven times faster than the reaction time of the average human. They correct vehicle paths by adjusting
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