In-engine deposit detection apparatus for engine control system

Details In-engine deposit detection apparatus for engine control system In-engine deposit detection apparatus for engine control system

1988-07-28

1989-09-26

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, 123480, F02D 4114

Patent

active

048692247

ABSTRACT:
An in-engine deposit detection apparatus for an engine control system is disclosed, comprising a sensor for detecting the output air-fuel ratio of the exhaust gas, a device for controlling the fuel supply amount according to the output air-fuel ratio from the sensor, acceleration detector for detecting a time point when an acceleration command is given the engine, a device for measuring a value based on the time length from a command time point detected by the acceleration detector to a time point that the sensor detects the shift of the output air-fuel ratio to rich side, a device for giving a reference value defining a limit of a normal range of the measurement obtained on the basis of the time length from the command time point detected by the acceleration detection means to the time point when the sensor detects that the output air-fuel ratio has shifted to rich side, and a device for comparing the measurement from the measuring means with a reference and deciding that there exists a deposit having an adverse effect on the engine control when the measurement deviates from the normal range defined by the reference value.

REFERENCES:
patent: 4796590 (1989-01-01), Degobart et al.

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