Apparatus for detecting malfunction in evaporated fuel purge sys

Details Apparatus for detecting malfunction in evaporated fuel purge sys Apparatus for detecting malfunction in evaporated fuel purge sys

1991-10-10

1992-09-01

Miller, Carl S.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123520, F02M 3302, F02D 7700

Patent

active

051430355

ABSTRACT:
A malfunction detection apparatus for detecting a malfunction in an evaporated fuel purge system for use in an internal combustion engine. The apparatus includes a vapor passage connecting a fuel tank to a canister for feeding fuel vapor from the fuel tank into the canister, a purge passage connecting the canister to an intake passage of the engine for feeding the fuel vapor adsorbed in an adsorbent in the canister into the intake passage, a purge control valve provided for controlling a flow of the adsorbed fuel vapor in the canister being fed into the intake passage, a pressure sensor provided for outputting a signal indicative of pressure in the vapor passage, and a malfunction detection part responsive to the signal outputted by the pressure sensor for detecting a malfunction in the evaporated fuel purge system.

REFERENCES:
patent: 4641623 (1987-02-01), Hamburg
patent: 4867126 (1989-09-01), Yonekawa
patent: 4962744 (1990-10-01), Uranishi
patent: 5085194 (1992-02-01), Kuroda
patent: 5085197 (1992-02-01), Mader

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