pellet Split n小球 honeycomb[" hAnikoumn蜂房,蜂巢 platinum' platinum]n白金,铂 palladium [pa'leidiam] n tU catalyst " kaetalist!n催化剂 render I' renda致使,表演,实施
pellet ['pelit] n.小球 honeycomb ['hʌnikoum] n.蜂房，蜂巢 platinum ['plætinəm] n.白金, 铂 palladium [pə'leidiəm] n.钯 catalyst ['kætəlist] n.催化剂 render ['rendə] v.致使，表演，实施
PHRASES AND EXPRESSIONS at worst 在最坏的情况下 throttle opening 节气门开度 EGR valve 废气再循环阀 wide-open throttle大节气门开度(简写为WoT) back pressure 背压 bleed port 通气孔 tapered tip 锥形端 EGR valve position EGR阀位置(EvP)传感器 (EVP)sensor pulse width 脉宽调制 modulation
PHRASES AND EXPRESSIONS pulse width 脉宽调制 modulation EGR valve position EGR阀位置（EVP）传感器 (EVP) sensor tapered tip 锥形端 bleed port 通气孔 back pressure 背压 wide-open throttle 大节气门开度（简写为WOT） EGR valve 废气再循环阀 throttle opening 节气门开度 at worst 在最坏的情况下
charcoal canister 活性炭罐 along with 与.一道(同时),以及,除.之 外(还) purge valve 清污阀 diverter valve 分流阀 air pump 空气泵 catalytic converter催化转换器 air injection 空气喷射
air injection 空气喷射 catalytic converter 催化转换器 air pump 空气泵 diverter valve 分流阀 purge valve 清污阀 与…一道（同时），以及，除…之 外（还） along with charcoal canister 活性炭罐
Overview of Emission Control Systems To minimize pollution of the atmosphere from incompletely burned and evaporating gases and to maintain good driveability and fuel economy, a number of emission control systems are used on all vehicles. They include positive crankcase ventilation(PCV) system, evaporative emission control(EVAP) system, exhaust gas recirculation(EGR system, air injection(AIR) system and three-way catalytic converter(Twc) system PCV System The purpose of the positive crankcase ventilation(PCv system is to take the vapors produced in the crankcase and piston blow-by, and redirect them into the air/fuel intake system to be burned during combustion. These vapors dilute the air/fuel mixture, they have to be carefully controlled and metered so as not to affect the performance of the engine. This is the job of the positive crankcase ventilation(PCv) valve
Overview of Emission Control Systems To minimize pollution of the atmosphere from incompletely burned and evaporating gases and to maintain good driveability and fuel economy, a number of emission control systems are used on all vehicles. They include positive crankcase ventilation (PCV) system，evaporative emission control (EVAP) system，exhaust gas recirculation (EGR) system，air injection (AIR) system and three-way catalytic converter (TWC) system. PCV System The purpose of the positive crankcase ventilation (PCV) system is to take the vapors produced in the crankcase and piston blow-by, and redirect them into the air/fuel intake system to be burned during combustion. These vapors dilute the air/fuel mixture, they have to be carefully controlled and metered so as not to affect the performance of the engine. This is the job of the positive crankcase ventilation (PCV) valve
At idle, when the air/fuel mixture is very critical, just a little of the vapors are allowed in to the intake system at high speed when the mixture is less critical and the pressures in the engine are greater, more of the vapors are allowed in to the intake system [1]. When the valve or the system is clogged, vapors will back up into the air filter housing or at worst, the excess pressure will push past seals and create engine oil leaks [2]. If the wrong valve is used or the system has air leaks, the engine will idle rough, or at worst engine oil will be sucked out of the engine EGR System Exhaust gas recirculation(EGR) systems reduce the amount of oxides of nitrogen produced during the combustion process. The EGR system dilutes the air/fuel mixture with controlled amounts of exhaust gas. Since exhaust gas does not burn, this reduces the peak combustion temperatures
At idle, when the air/fuel mixture is very critical, just a little of the vapors are allowed in to the intake system. At high speed when the mixture is less critical and the pressures in the engine are greater, more of the vapors are allowed in to the intake system [1]. When the valve or the system is clogged, vapors will back up into the air filter housing or at worst, the excess pressure will push past seals and create engine oil leaks [2]. If the wrong valve is used or the system has air leaks, the engine will idle rough, or at worst engine oil will be sucked out of the engine. EGR System Exhaust gas recirculation (EGR) systems reduce the amount of oxides of nitrogen produced during the combustion process. The EGR system dilutes the air/fuel mixture with controlled amounts of exhaust gas. Since exhaust gas does not burn, this reduces the peak combustion temperatures