Power train and emission control: allocation procedure by OBD-II system for automotive technology

[摘要] OBD-II, systems were designed to maintain low emissions of in use vehicles, including light and medium duty vehicles. In 1989, the California code of Regulations (CCR) known as OBD - II was adopted by the California Air Resource Board (CARB) and the objective to reduce hydrocarbon (HC) emission caused by malfunction of the vehicles emission control systems. OBD-II provides additional information to engineer for diagnosis and repair of emissions related problems. OBD-II, standardizes on the amount of memory (Freeze Frame) it uses to store the readings of the vehicle sensor when it logs on emission related Intermittent Trouble code (IT). The intent of OBD-II, systems is to detect most vehicle malfunctions when performance of a power train component or system deteriorates to the point that the vehicle's HC emission exceed standard. The vehicle operator is notified at the time when the vehicle begins to marginally exceed emission standards, by illuminating the Malfunctions Indicator Light (MIL).

[发布机构] Automobile Engineering Department, Vocational Education (+2), M R S Higher Secondary School, Govt. of India, Titabor, Jorhat, Assam, India^1

[效力级别] 机械制造 [学科分类] 航空航天科学

[关键词] Automotive technology;California Air Resource Board;Duty vehicles;Emission standard;HC emissions;Powertrain components;Vehicle operators;Vehicle sensors