Title:
FAILURE DIAGNOSING DEVICE OF EVAPORATION PURGE SYSTEM
Document Type and Number:
Japanese Patent JP3198865
Kind Code:
B2
Abstract:
PURPOSE: To correctly diagnose whether an evaporation purge system is at fault or not.
CONSTITUTION: A canister 10 absorbing evaporation fuel from an engine fuel tank 11 and a purge passage 14 connecting the canister 10 to an engine intake passage 2 through a purge control valve 15 are provided. In a control circuit 20, pressure in the canister 10 in a condition in which the purge control valve 15 is closed and pressure in the canister 10 is stabilized is detected by a pressure sensor 30. In the case where a deviation between pressure and atmospheric pressure is a prescribed value or more, it is judged that abnormal state such as leakage is not generated in the canister 10.
Inventors:
Susumu Shinohara
Shinsuke Kiyomiya
Shinsuke Kiyomiya
Application Number:
JP6085895A
Publication Date:
August 13, 2001
Filing Date:
March 20, 1995
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02M25/08; (IPC1-7): F02M25/08
Domestic Patent References:
| JP712015A | ||||
| JP681728A | ||||
| JP6147031A |
Attorney, Agent or Firm:
Takashi Ishida (3 others)