Title:
蒸発燃料処理装置の診断装置
Document Type and Number:
Japanese Patent JP4022982
Kind Code:
B2
Abstract:
There is provided an apparatus for detecting a leak in an evaporative emission control system for an internal combustion engine including a fuel tank, a canister for collecting fuel vapors from the fuel tank, and a purge control valve disposed between the canister and the intake pipe for allowing flow of the fuel vapors from the canister to the intake pipe such that a fuel vapor flow passage is provided which extends from the fuel tank to the purge control valve by way of the canister. The apparatus comprises a vent control valve for selectively opening and closing an atmospheric vent of a canister, an actuating device for actuating the purge control valve and the vent control valve to fully close immediately after the engine starts and thereby closing the fuel vapor flow passage in a way as to prevent communication between an inside and outside of the fuel vapor flow passage, a pressure sensor for detecting a pressure in the fuel vapor flow passage, and a diagnostic device for detecting a leak on the basis of the pressure in the fuel vapor flow passage which reduces with increase of consumption of fuel in the fuel tank after the fuel vapor flow passage is closed.
Inventors:
Katsuhiko Kawamura
Akihiro Kono
Akihiro Kono
Application Number:
JP10939598A
Publication Date:
December 19, 2007
Filing Date:
April 20, 1998
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02M25/08; F02D41/02; F02D45/00
Domestic Patent References:
| JP6081728A | ||||
| JP8270480A |
Attorney, Agent or Firm:
Masaki Goto
Yoshio Matsuda
Yoshio Matsuda