Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1997-02-12
1999-09-28
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123198D, F02M 3704
Patent
active
059571152
ABSTRACT:
A system and method for an engine-powered automotive vehicle evaporative emission control system having an evaporative emission space for containing volatile fuel vapors, and a leak detection system for detecting leakage from the evaporative emission space. At the beginning of a test, an initial test pressure that differs sufficiently from atmospheric pressure to allow a leak to be detected is created in the evaporative emission space. After attainment of the initial test pressure in the evaporative emission space, the initial test pressure is restored whenever the pressure changes by a predetermined amount due to a leak. The test includes measuring at least one of: a time interval required for pressure in the evaporative emission space to change from the initial test pressure by the predetermined amount; and b) a time interval required to restore the initial test pressure in the evaporative emission space.
REFERENCES:
patent: 5069188 (1991-12-01), Cook
patent: 5143035 (1992-09-01), Kayanuma
patent: 5146902 (1992-09-01), Cook et al.
patent: 5193512 (1993-03-01), Steinbrenner et al.
patent: 5205263 (1993-04-01), Blumenstock et al.
patent: 5267470 (1993-12-01), Cook
patent: 5299545 (1994-04-01), Kuroda
patent: 5327873 (1994-07-01), Ohuchi
patent: 5353771 (1994-10-01), Blumenstock et al.
patent: 5383437 (1995-01-01), Cook et al.
patent: 5396873 (1995-03-01), Yamanaka
patent: 5398661 (1995-03-01), Denz et al.
patent: 5398662 (1995-03-01), Igarashi
patent: 5411004 (1995-05-01), Busato et al.
patent: 5460142 (1995-10-01), Denz et al.
patent: 5460143 (1995-10-01), Narita
patent: 5476083 (1995-12-01), Blumenstock
patent: 5505182 (1996-04-01), Denz et al.
patent: 5666925 (1997-09-01), Denz et al.
Busato Murray F.
Cook John E.
Perry Paul D.
Miller Carl S.
Siemens Canada Limited
LandOfFree
Pulse interval leak detection system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pulse interval leak detection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse interval leak detection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-692432