Patent ID: 6532931
Filing Date: 2003-03-18
Classification: F01M,F02B,F02M,F16L,H01R,Y02T

Abstract:
A disengagement detection system for a joint portion wherein a feedback path for feeding back blowby gas to an intake path of an engine is formed by coupling a plurality of cavities, whereinsaid joint portions provided at each of a pair of said cavities and mutually coupled are provided with a pair of connector portions which are engaged/disengaged in accordance with engagement/disengagement of said joint portions, respectively, a detection means is provided for detecting a non-conductive state between terminal metal members provided at said connector portions, said detection means outputs a disengagement detection signal when a state between said terminal metal members is non-conductive, plural pairs of said connector portions are provided, said detection means includes a switch circuit which is closed only when all said connector portions are coupled to partner-side connector portions, respectively, and all said terminal metal members are conductively coupled mutually, and said detection means detects that a state between said terminal metal members having been mutually coupled at one of said connector portions becomes non-conductive when said switch circuit is opened.