Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1991-10-10
1992-10-27
Miller, Carl S.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
123520, F02M 3302, F02B 7700
Patent
active
051580543
ABSTRACT:
An 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, an air inlet passage connecting an air inlet port of the canister to the atmosphere, a first control valve provided for controlling a flow of the adsorbed fuel vapor from the canister to the intake passage, a pressure sensor provided for outputting a signal indicative of a pressure in the air inlet passage, a second control valve for controlling a flow of external air fed into the vapor passage from the air inlet port of the canister, 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: 3680318 (1972-08-01), Nakajima
patent: 4467769 (1984-08-01), Matsumura
patent: 4641623 (1987-02-01), Hamburg
patent: 4867126 (1989-09-01), Yonekawa
patent: 4949695 (1990-08-01), Uranishi et al.
patent: 4962744 (1990-10-01), Uranishi
patent: 5085194 (1992-02-01), Kuroda
Miller Carl S.
Toyota Jidosha & Kabushiki Kaisha
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