Internal combustion engine

Details Internal combustion engine Internal combustion engine

1991-11-13

1993-05-04

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

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

60286, 60294, 60300, 60303, F01N 336

Patent

active

052070581

ABSTRACT:
An internal combustion engine includes fuel injectors which directly inject high pressure fuel into combustion chambers of the engine. Spark plugs are provided in the combustion chambers, a catalytic converter is provided in the middle of the exhaust pipe for purifying the exhaust, and a temperature sensor is provided for detecting the temperature of a catalyst of the catalytic converter. A control unit which receives as input the engine rotational speed, load, and the detection value of the catalyst temperature sensor controls the engine such that, when the temperature of the catalyst is lower than a predetermined target temperature, the fuel injectors inject additional fuel into the combustion chambers during at least one of the expansion stroke and the exhaust stroke to mix the fuel with the exhaust. Thereafter, the exhaust having the additional fuel mixed in is reignited upstream of the catalytic converter to heat the catalyst to the target temperature.

REFERENCES:
patent: 3058298 (1962-10-01), Morris
patent: 3451213 (1969-06-01), Lang
patent: 3460916 (1969-08-01), Aronsohn
patent: 3590579 (1971-07-01), Takahashi
patent: 3779015 (1973-12-01), Maruoka
patent: 4955339 (1990-09-01), Sasaki

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