Method for Controlling Injection Amount of Fuel of Burner and Aftertreating Device of Exhaust Gas

Abstract

Disclosed is a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, and more particularly, to a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, in which the burner is controlled in consideration of exothermic effect due to a catalytic filter, thereby stably reducing exhaust gas.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, and more particularly, to a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, in which the burner is controlled in consideration of exothermic effect due to a catalytic filter, thereby stably reducing exhaust gas.BACKGROUND ART[0002]In general, since a diesel engine has higher power and lower fuel expenses than a gasoline engine, it is widely applied to vehicles, construction equipments, ships and the like.[0003]However, the diesel engine is a four-stroke engine in which fuel is injected into the engine and then burnt in a compression ignition method, and in a self-ignition process of the fuel, incomplete combustion occurs due to non-uniformity of a fuel-air ratio, and thus noxious particle (exhaust gas) is generated.[0004]Particularly, the noxious particle mainly co...

AI Technical Summary

Benefits of technology

[0027]According to the method for controlling the injection amount of fuel of the burner and the aftertreating device of exhaust gas according to the present invention as described above, there is provided a sensor for controlling the fuel injection amount of the burner in consideration of the exothermic effect occurred when the fuel injected from the burner passes through the catalytic filter or the pro-catalyst, thereby efficiently reducing the emissions of exhaust gas without deterioration in the durability.

[0028]Further, the present invention appropriately operates the burner according to a vehicle condition and a driving state and prevents the problems occurred by the non-reacted fuel injected from the burner.

Problems solved by technology

But the temperature of the exhaust gas after passing through the catalytic filter or the pro-catalyst may be 900° C. between the catalytic filter and the pro-catalyst or at the rear end of the catalytic filter, because an excessive and non-reacted hydrocarbon compound generates the heat by catalytic combustion while passing through the catalyst.

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