Evaporative fuel-processing system for internal combustion engin

Details Evaporative fuel-processing system for internal combustion engin Evaporative fuel-processing system for internal combustion engin

1996-03-01

1997-10-21

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

F02M 3704

Patent

active

056785232

ABSTRACT:
An evaporative fuel-processing system for an internal combustion engine has an evaporative emission control system and a pressure sensor. An ECU carries out negative pressurization of the interior of the evaporative emission control system, by opening a purge control valve and closing a vent shut valve. The purge control valve is closed over a predetermined time period after the interior of the evaporative emission control system is brought into the predetermined negatively pressurized state, and a rate of decrease in negative pressure within the evaporative emission control system is detected. Then, it is determined whether or not there is leakage from the evaporative emission control system, based on the detected rate of decrease in the negative pressure, and at least one detected pressure value at at least one predetermined time point within the predetermined time period over which the purge control valve is closed.

REFERENCES:
patent: 5396873 (1995-03-01), Yamanaka et al.
patent: 5460141 (1995-10-01), Denz et al.
patent: 5460143 (1995-10-01), Narita
patent: 5463998 (1995-11-01), Denz et al.
patent: 5474047 (1995-12-01), Cochard et al.
patent: 5476083 (1995-12-01), Blumenstock
patent: 5499613 (1996-03-01), Bayerle et al.
patent: 5542397 (1996-08-01), Takahata et al.

Affiliated with

Also associated with

Rating

Evaporative fuel-processing system for internal combustion engin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Evaporative fuel-processing system for internal combustion engin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evaporative fuel-processing system for internal combustion engin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-998874