发明名称 |
Diagnosing system for engine |
摘要 |
A diagnosing system for an engine diagnoses malfunctions that occur in a direct-injection engine in which fuel is injected into combustion chambers or a lean-burn engine. The present invention provides a diagnosing system for an engine capable of diagnosing malfunctions in an intake air flow intensifying component and a fuel supply component and of specifying a malfunctioning part without being affected by the difference between different engines, the difference in quality between parts and aging. The diagnosing system for an engine comprises: a selecting component for selecting either a first air-fuel mixture control component or a second air-fuel mixture control component according to operating condition of an engine; a combustion condition detecting component for detecting combustion condition of the engine; and decision component for deciding a malfunction on the basis of a first combustion condition detected by the combustion condition detecting component in a state where the first air-fuel mixture control component is selected by the selecting component, and a second combustion condition detected by the combustion condition detecting component in a state where the second air-fuel mixture control component is selected by the selecting component.
|
申请公布号 |
US6430495(B2) |
申请公布日期 |
2002.08.06 |
申请号 |
US20010902606 |
申请日期 |
2001.07.12 |
申请人 |
HITACHI, LTD. |
发明人 |
TAKAKU YUTAKA;ISHII TOSHIO;NOGI TOSHIHARU |
分类号 |
F02D45/00;F02D41/02;F02D41/04;F02D41/22;F02D41/34;(IPC1-7):G06F19/00;F02B17/00 |
主分类号 |
F02D45/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|