Warming up control device for a catalytic converter for an inter

Details Warming up control device for a catalytic converter for an inter Warming up control device for a catalytic converter for an inter

1995-02-08

1997-03-25

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60285, F01N 320

Patent

active

056133600

ABSTRACT:
The warming up control device according to the present invention determines precisely whether the temperature of the catalytic converter of the internal combustion engine has reached the activating temperature of the catalyst after the engine starts, The device estimates the heat amount transferred from the exhaust gas the catalytic converter based on the amount of the fuel supplied to the engine, and calculates the total heat amount transferred to the catalytic converter after the engine starts. The device determines that the temperature of the catalytic converter reaches the activating temperature of the catalyst when the calculated total heat amount reaches a predetermined value. Since the completion of the warming up of the catalytic converter is precisely determined, the warming up operation of the catalyst, such as the ignition timing retardation, can be terminated at a proper time, thus an unnecessary increase in fuel consumption and a deterioration in the engine performance can be avoided.

REFERENCES:
patent: 4656829 (1987-04-01), Creps
patent: 5303168 (1994-04-01), Cullen

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