Title:
【発明の名称】蒸発燃料制御装置
Document Type and Number:
Japanese Patent JP2825399
Kind Code:
B2
Abstract:
A fuel vapor purge system for an internal combustion engine comprises a fuel tank, a purge pipe for introducing fuel vapor generated in the fuel tank into an intake passage of the engine, a purge valve installed in the piping, an engine control unit for opening the purge valve in dependence on the state in which the engine operates, a pressure sensor for detecting a pressure within the fuel tank, and an alarm being operative under the control of the engine control unit. The engine control unit opens the purge valve for a first predetermined period when the engine operation is in a steady state, makes decision as to occurrence of an abnormality in the purge system on the basis of a magnitude of change in the internal pressure of the fuel tank over a second predetermined period covering the first predetermined period, and activates the alarm when occurrence of an abnormality is determined.
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Inventors:
ISHIDA YASUHIKO
Application Number:
JP22280792A
Publication Date:
November 18, 1998
Filing Date:
August 21, 1992
Export Citation:
Assignee:
MITSUBISHI DENKI KK
International Classes:
F02D41/00; F02B77/08; F02M25/08; (IPC1-7): F02M25/08
Domestic Patent References:
| JP5240117A | ||||
| JP579408A |
Attorney, Agent or Firm:
Soga Doteru (6 people outside)