PROFESSIONAL ENGLISH UNIT1O BRAKING SYSTEMS TEXT B Traction Control System (TRAC) and Electronic Stability Control (EsC)
UNIT10 BRAKING SYSTEMS TEXT B Traction Control System (TRAC) and Electronic Stability Control (ESC) PROFESSIONAL ENGLISH
本次课学习内容 UNIT 3 BRAKING SYSTEMS TEXT B Traction Control System(TRAC) and Electronic Stability Control (ESC) Traction Control System (TRAc) Components TRAC Operation Intake Electronic Stability Control (ESC What Is Electronic Stability Control? How esC Works Many Names
UNIT 3 BRAKING SYSTEMS TEXT B Traction Control System (TRAC) and Electronic Stability Control (ESC) • Traction Control System (TRAC) Components TRAC Operation • Intake Electronic Stability Control (ESC) What Is Electronic Stability Control? How ESC Works Many Names 本次课学习内容
本次课学习目标 ●掌握TRAC和ESC系统的有关属术语 ●掌握TRAC和ESC系统的组成和原理 ●提高翻译技巧与阅读能力
本次课学习目标 ⚫ 掌握 TRAC和ESC系统的有关属术语 ⚫ 掌握TRAC和ESC系统的组成和原理 ⚫ 提高翻译技巧与阅读能力
NEW WORDS coefficient [ keaui'ft∫nt]n系数 gravel ['graeval] n砂砾,砂砾层 console [kn's。u n控制台 deactivate [di: aektiveit]v解除,使无效,使不活动 slIppage I'slipid I n滑动滑移 alleviate [ali:viet v减轻 headline [hedlain] n大字标题 rollover 'r。 album]n倾翻 intervene [inta'vi:n] v干涉,干预插入,介入 oversteer(ing)[' augest(ri)]n过度转向 understeer(ing)['^ nastia(rin)]n不足转向 Cheil] v.&n招呼欢呼,高呼 yaw-rate [j。:'reit] n横摆速率 default Idif: It n.&k默认〔值)
NEW WORDS coefficient [kəui'fi∫ənt] n.系数 gravel ['græ vəl] n.砂砾, 砂砾层 console [kən'səul] n.控制台 deactivate [di:'æ ktiveit] v.解除, 使无效, 使不活动 slippage ['slipid ] n.滑动, 滑移 alleviate [ə'li:vieit] v.减轻 headline ['hedlain] n.大字标题 rollover ['rəul ֽ əuvə] n.倾翻 intervene [ֽ intə'vi:n] v.干涉, 干预, 插入, 介入 oversteer(ing) ['əuvəstiə(riŋ)] n. 过度转向 understeer(ing) ['ʌndəstiə(riŋ)] n. 不足转向 hail [heil] v. & n.招呼,欢呼, 高呼 yaw-rate ['jɔ:'reit] n.横摆速率 default [di'fɔ:lt] n. & v.默认(值)
PHRASES AND EXPRESSIONS traction control 牵引控制系统(Tcs) system(TCs) sub- throttle plate副节气门 center console 中央控制台 TRAC brake actuator TRAC制动执行器 master cylinder cut主缸切断电磁阀,主缸隔离电磁阀 solenoid valve pressure regulator调压电磁阀 valve electronic stability电子稳定性控制(EsC) control (Esc) make the headlines成为头条新闻 make a difference发生影响,起作用,区别对待 active safety system主动安全系统
PHRASES AND EXPRESSIONS traction control system(TCS) 牵引控制系统（TCS） sub-throttle plate 副节气门 center console 中央控制台 TRAC brake actuator TRAC制动执行器 master cylinder cut solenoid valve 主缸切断电磁阀，主缸隔离电磁阀 pressure regulator valve 调压电磁阀 electronic stability control (ESC) 电子稳定性控制（ESC） make the headlines 成为头条新闻 make a difference 发生影响，起作用，区别对待 active safety system 主动安全系统
Traction Control System (TRAC) and Electronic Stability Control (ESC) Traction Control System (TRAc) The purpose of the traction control system (tcs, or TRAC) (Fig. 10-3)is to prevent wheel spin from occurring due to acceleration the maximum torque that can be transmitted to the wheels is determined by the coefficient of friction generated between the road and the tires. If torque exceeds that level, the wheels are likely to spin. Conditions for TRAC operation may include: loose gravel, slippery road surfaces, acceleration while cornering and hard acceleration [1] Once activated the trac system reduces engine torque and rear wheel speed as necessary to bring the vehicle under control. The abs ecu, tRac ecu and ecm all work together to provide traction control aBs speed sensors are monitored by the tRaC eCU which in turn controls a sub-throttle plate and applies the rear brakes. the ECM also retards engine timing while the abs modulates pressure at the rear brakes
Traction Control System (TRAC) and Electronic Stability Control (ESC) Traction Control System (TRAC) The purpose of the traction control system (TCS, or TRAC) (Fig.10-3) is to prevent wheel spin from occurring due to acceleration. The maximum torque that can be transmitted to the wheels is determined by the coefficient of friction generated between the road and the tires. If torque exceeds that level, the wheels are likely to spin. Conditions for TRAC operation may include: loose gravel, slippery road surfaces, acceleration while cornering and hard acceleration [1]. Once activated, the TRAC System reduces engine torque and rear wheel speed as necessary to bring the vehicle under control. The ABS ECU, TRAC ECU and ECM all work together to provide traction control. ABS speed sensors are monitored by the TRAC ECU which in turn controls a sub-throttle plate and applies the rear brakes. The ECM also retards engine timing while the ABS modulates pressure at the rear brakes
Main Throttle Position Sensor TRAC ECU ECM' [Engine ECU] ABS Actuator ABS ECU TRAC Motor Rela TRAC OFF Switch Brake Fluid Lovel Warning Switch TRAC Solenoid Relay TRAC OFF Indicator Light Sub-Throttle Position Sensor Sub-Throttle Valve Motor Rear Speed Sensors TRAC Indicator Light Front speed Sensors TRAC Brake Actuator TRAC Pump Fig. 10-3 TRAC system components
Fig. 10-3 TRAC system components
Components The TRAC oFF switch is located on the instrument panel above the center console it allows the driver to activate or deactivate the trac system when the switch is depressed the system defaults to on when the ignition switch is cycled The TRAC OFF indicator light goes on when anyone of the following occur the trac system is deactivated by the trac oFF switch a tRac related problem is detected with the engine an abs related problem is detected The tRac indicator light indicates when the system is operating a malfunction occurs in the system(it remains illuminated to warn the driver) the diagnostic mode is set within the TRAC ECU (the light blinks the trouble code)
Components The TRAC OFF switch is located on the instrument panel above the center console. It allows the driver to activate or deactivate the TRAC system when the switch is depressed. The system defaults to ON when the ignition switch is cycled. The TRAC OFF indicator light goes on when anyone of the following occur: ·the TRAC system is deactivated by the TRAC OFF switch. ·a TRAC related problem is detected with the engine. ·an ABS related problem is detected. The TRAC indicator light indicates when: ·the system is operating. ·a malfunction occurs in the system (it remains illuminated to warn the driver). ·the diagnostic mode is set within the TRAC ECU (the light blinks the trouble code)
Sub-Throttle valve Motor The sub -throttle actuator uses a step motor located between the main throttle valve and air cleaner it is fitted on the throttle body and controls the position of the sub-throttle valve based on commands made by the trac ecu thus controlling the engine output. By controlling the sub-throttle plate engine management controls engine torque reducing wheel spin Sub-Throttle Position Sensor This sensor is fitted to the sub -throttle valve shaft it converts the sub-throttle valve opening angle to a voltage signal and sends this signal to the TRAC ECU via the ECM(Engine ECU). The sensor operates in the same way as the main throttle position sensor. TRAC Pump The function of the TRaC Pump is to generate brake fluid pressure necessary for applying the rear disc brakes when the TRAC system is operating. It draws brake fluid from the master linder reservoir, pressurizes and directs it to the tRac brake actuator
Sub-Throttle Valve Motor The sub-throttle actuator uses a step motor located between the main throttle valve and air cleaner. It is fitted on the throttle body and controls the position of the sub-throttle valve based on commands made by the TRAC ECU thus controlling the engine output. By controlling the sub-throttle plate, engine management controls engine torque reducing wheel spin. Sub-Throttle Position Sensor This sensor is fitted to the sub-throttle valve shaft. It converts the sub-throttle valve opening angle to a voltage signal and sends this signal to the TRAC ECU via the ECM (Engine ECU). The sensor operates in the same way as the main throttle position sensor. TRAC Pump The function of the TRAC Pump is to generate brake fluid pressure necessary for applying the rear disc brakes when the TRAC system is operating. It draws brake fluid from the master cylinder reservoir, pressurizes and directs it to the TRAC brake actuator
Main Throttle valve Sub-Throttle Valve Cam Gear Pinion Gear Sub-Throttle Valve Motor Fig 10-4 Sub-throttle valve motor
Fig.10-4 Sub-throttle valve motor