Method of and apparatus for detecting fuel system leak

Details Method of and apparatus for detecting fuel system leak Method of and apparatus for detecting fuel system leak

1994-02-14

1995-11-21

Williams, Hezron E.

Measuring and testing

With fluid pressure

Motor part or auxiliary

73 492, 73 405R, 340605, G01M 332

Patent

active

054676410

ABSTRACT:
The existence of an unacceptable vapor leak can be determined by monitoring the pressure within a fuel system of an internal combustion engine. Once the engine is switched off, a period is timed to allow pressure variations due to movement of the fuel to subside to an acceptable level. The fuel system is closed and a first rate of pressure increase is determined by measuring a first time taken for the pressure to rise by a predetermined amount. A leak of a predetermined size is then introduced and a second rate of pressure increase is determined by measuring a second time taken for the pressure to rise by a predetermined amount. The first and second times are then compared to detect whether or not an unacceptable leak exists.

REFERENCES:
patent: 4608857 (1986-09-01), Mertens et al.
patent: 4625545 (1986-12-01), Holm et al.
patent: 4837707 (1989-06-01), Giometti et al.
patent: 4876530 (1989-10-01), Hill et al.
patent: 5267470 (1993-12-01), Cook
patent: 5361622 (1994-11-01), Wall
patent: 5369984 (1994-12-01), Rodgers et al.

Affiliated with

Also associated with

Rating

Method of and apparatus for detecting fuel system leak does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of and apparatus for detecting fuel system leak, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for detecting fuel system leak will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1129797