Evaporative emission control system for internal combustion engi

Details Evaporative emission control system for internal combustion engi Evaporative emission control system for internal combustion engi

1992-09-03

1993-08-31

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60290, 60293, 123520, F01N 330, F02M 3302

Patent

active

052398242

ABSTRACT:
An evaporative emission control system for an internal combustion engine having an exhaust passage, an exhaust secondary air supply system connected to the exhaust passage for supplying secondary air thereto, has an ECU which detects an amount of evaporative fuel generated in a fuel tank, e.g., from an output from a tank internal pressure sensor which detects pressure within the fuel tank. An evaporative fuel passage connects between the fuel tank and the secondary air supply means. A control valve is arranged across the evaporative fuel passage for controlling an amount of the evaporative fuel flowing the evaporative fuel passage. The ECU is responsive to an output from the tank internal pressure sensor for causing the control valve to open when the amount of the evaporative fuel exceeds a predetermined value.

REFERENCES:
patent: 3618314 (1971-11-01), Krebs
patent: 4467769 (1984-08-01), Matsumura
patent: 5176123 (1993-01-01), Hosoda

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