内燃机的控制装置制造方法及图纸

本发明专利技术提供一种在进气压力变得比排气压力高的高进气压力条件下，能够良好地判定EGR阀的关闭故障的内燃机的控制装置。配备有向进气口（12a）喷射燃料的进气口燃料喷射阀（36）。配备有连接进气通路（12）和排气通路（14）的EGR通路（50）。配备有负责EGR通路（50）的开闭的EGR阀（58），配备有检测从内燃机（10）的气缸内排出的排气的实际空燃比的主空燃比传感器（46）。在关闭EGR阀（58）的关闭指令时，高进气压力条件及过渡条件成立的情况下，在由主空燃比传感器（46）检测出的排气的空燃比的实测值是比排气的空燃比的目标值稀规定的稀判定值以上的值的情况下，判定为发生EGR阀（58）的关闭故障。

Control device for internal combustion engine

The invention provides a control device of an internal combustion engine, which can be used to judge the closing fault of a EGR valve under the condition that the inlet pressure becomes higher than the exhaust pressure. Intake port fuel injection valve () equipped with intake air (12a) jet fuel. A EGR path (50) is provided with an air intake passage (12) and an exhaust passage (). An open and close EGR valve (58) equipped with a EGR path (50) is provided with a main air fuel ratio sensor (46) for detecting the actual air-fuel ratio of the exhaust gas discharged from the cylinder of an internal combustion engine (10). In the closed EGR valve (58) close commands, high inlet pressure conditions and the transition condition, in by the main air-fuel ratio sensor (46) detects the exhaust air-fuel ratio of the measured value is the ratio of the air-fuel ratio of the exhaust gas of the specified target value to determine the value of dilute dilute above the value of the case, judge for the EGR valve (58) close fault.

【技术实现步骤摘要】
【国外来华专利技术】

【技术保护点】

【技术特征摘要】
【国外来华专利技术】

【专利技术属性】
技术研发人员：井上政广，
申请(专利权)人：丰田自动车株式会社，
类型：
国别省市：