Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1991-07-05
1992-02-18
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123520, 123494, 55270, F02M 3302
Patent
active
050884662
ABSTRACT:
An evaporated fuel gas purging system comprises a chamber having a case and a cap, the chamber being divided into a plurality of sub-chambers by partitioning plates each having through holes; a pair of electrodes provided in one of the sub-chambers, the one of sub-chambers being filled with an adsorbent and communicating with the other sub-chambers having an inlet port, an outlet port and a purge port, respectively; and a control circuit for detecting changes in electrical characteristics between the electrodes so that the amount of a fuel gas adsorbed by the adsorbent is detected. An evaporated fuel gas purging system further comprises a purging unit for purging the adsorbed gas, a control unit for controlling the purging unit, and a display unit operating in response to quantitative changes in the amount of the adsorbed gas. The display unit is operated in case a preserved difference does not occur in the amount of the adsorbed gas found by comparing the amount of the adsorbed gas detected at the time when the purging unit is not in operation and the amount of the adsorbed gas detected after the elapse of a prescribed duration of time after the control unit operated to put the purging unit into its operation.
REFERENCES:
patent: 4116184 (1978-09-01), Tomita
patent: 4338905 (1982-07-01), Urich
patent: 4748959 (1988-06-01), Cook et al.
patent: 4915713 (1990-04-01), Buzza et al.
patent: 4949695 (1990-08-01), Uranishi et al.
Cross E. Rollins
Mitsubishi Denki K.K.
Moulis Thomas N.
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