Purge system flow monitor and method

Details Purge system flow monitor and method Purge system flow monitor and method

1995-12-11

1997-07-29

Miller, Carl S.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123198D, F02M 3302

Patent

active

056513496

ABSTRACT:
A system and method of monitoring the purge flow in an evaporative emission control purge system of a motor vehicle. Signals indicative of engine speed, fuel control and automatic idle speed position are measured and used to determine whether the purge flow system is operating properly. With purge flow activated, the amount of purge flow is increased in accordance with a ramping rate and the measured signals are monitored to determine whether or not a change occurs in any one of the engine speed, fuel control and AIS position signals.

REFERENCES:
patent: 4949695 (1990-08-01), Uranishi
patent: 5085194 (1992-02-01), Kuroda
patent: 5105789 (1992-04-01), Aramaki
patent: 5230319 (1993-07-01), Otsuka
patent: 5245973 (1993-09-01), Otsuka
patent: 5297527 (1994-03-01), Suzuki
patent: 5488936 (1996-02-01), Rychlick

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