发明名称 |
METHOD OF DETECTING MISFIRE BY UTILIZING VARIATION OF ROTATION OF CRANKSHAFT |
摘要 |
A misfire detecting method capable of detecting the occurrence of misfire accurately without involving a misfire detection error ascribable to the vibratory increase and decrease, which occurs after misfire has happened, of the variation rate of rotation of a crankshaft, and, moreover, requiring no special hardware for this purpose. The angular accelerations D omega n-2, D omega n-1, D omega n and D omega n+1 in the crank angle regions corresponding to the preceding cylinder, two cylinders to be subjected to the detection of misfire and the succeding cylinder are calculated sequentially by a processor to which pulse outputs are inputted from a crank angle sensor. When the values D omega n-1 and D omega n decrease considerably as compared with values D omega n-2 and D omega n-1, a tentative judgement that misfire occurs in the two object cylinders to be detected is made. When the value D omega n+1 then increases appreciably as compared with the value D omega n, the restoration to normal combustion condition is ascertained, and the occurrence of misfire in these two object cylinders to be detected is definitely determined. |
申请公布号 |
WO9325811(A1) |
申请公布日期 |
1993.12.23 |
申请号 |
WO1993JP00766 |
申请日期 |
1993.06.08 |
申请人 |
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA |
发明人 |
MATSUMOTO, TAKUYA;HASHIMOTO, TORU;MIYAKE, MITSUHIRO;YOSHIDA, YASUHISA;YANAGISAWA, MITSUHIKO;NAKAJIMA, HIROYUKI |
分类号 |
F02D41/14;G01M15/11;(IPC1-7):F02D45/00;F02P17/00 |
主分类号 |
F02D41/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|