Evaporative fuel-purging control system for internal combustion

Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system

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123198D, F02M 3302, F02B 7700

Patent

active

052634612

ABSTRACT:
An evaporative fuel-purging control system for an internal combustion engine incorporates a flowmeter arranged across a purging passage for outputting an output value indicative of the flow rate of a mixture of evaporative fuel and air being purged through the purging passage. Abnormality of the flowmeter is determined, based on a value of the output value therefrom assumed when the purging of the gaseous mixture is stopped. Alternatively or in combination, abnormality of the flowmeter is determined, based on a value of the output value therefrom assumed when the purging of the gaseous mixture is resumed after stoppage thereof.

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patent: 5143035 (1992-09-01), Kayanuma
patent: 5176123 (1993-01-01), Hosoda et al.
patent: 5178117 (1993-01-01), Fujimoto et al.

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