Function diagnosis apparatus for evaporative emission control sy

Details Function diagnosis apparatus for evaporative emission control sy Function diagnosis apparatus for evaporative emission control sy

1996-07-12

1998-06-16

Dombroske, George M.

Measuring and testing

Simulating operating condition

Marine

123520, G01M 1500

Patent

active

057673950

ABSTRACT:
A function diagnosing apparatus of an evaporative emission control system for an automotive vehicle executes a diagnosis when a diagnosis starting condition is satisfied. First, a purge cut valve and a vent cut valve are closed, and a bypass valve for a one way valve disposed between a fuel tank and a canister is opened. When a pressure in a purging line is not raised up by these valve operations, it is decided that the system goes wrong due to one of of the bypass valve in a cold condition, fuel vapor leakage, of the vent cut valve in an open condition, and/or no vapor existence. Upon opening the vent cut valve, it is decided as to whether the purge line pressure is dropped or not. When the purge line pressure is dropped, it is decided that the vent cut valve is normal. When the purge line pressure is not dropped, it is decided that vent cut valve is sticking closed.

REFERENCES:
patent: 5150689 (1992-09-01), Yano et al.
patent: 5197442 (1993-03-01), Blumenstock et al.
patent: 5251477 (1993-10-01), Nakashima et al.
patent: 5275144 (1994-01-01), Gross
patent: 5284050 (1994-02-01), Iida et al.
patent: 5363828 (1994-11-01), Yamashita et al.
patent: 5427075 (1995-06-01), Yamanaka et al.
patent: 5441031 (1995-08-01), Kiyomiya et al.
patent: 5448980 (1995-09-01), Kawamura et al.
patent: 5450834 (1995-09-01), Yamanaka et al.
patent: 5479905 (1996-01-01), Ito
patent: 5494021 (1996-02-01), Yoneyama
patent: 5495842 (1996-03-01), Yamanaka et al.
patent: 5497754 (1996-03-01), Ito
patent: 5501199 (1996-03-01), Yoneyama
patent: 5560243 (1996-10-01), Wild
patent: 5614665 (1997-03-01), Curran et al.

Affiliated with

Also associated with

Rating

Function diagnosis apparatus for evaporative emission control sy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Function diagnosis apparatus for evaporative emission control sy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Function diagnosis apparatus for evaporative emission control sy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1727788