Method and apparatus for controlling the amount of exhaust gas r

Details Method and apparatus for controlling the amount of exhaust gas r Method and apparatus for controlling the amount of exhaust gas r

1993-11-23

1995-01-10

Okonsky, David A.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

F02M 2507

Patent

active

053797442

ABSTRACT:
An apparatus for controlling the amount of exhaust gas recycled has a pneumatic valve 7, coupled to a pressure chamber 12 which is connected, on the one hand, over a pipeline 14 with the intake manifold 2 of the internal combustion engine and, on the other, for changing the exhaust gas recycling rate, with the atmosphere over a pipeline 16, through an electromagnetic valve 17. The duty cycle of the cycle valve 17 is varied by electronic control equipment 20 in accordance with the desired rate of recycled exhaust gas. An elevation correction is attained for the recycling rate because the atmospheric pressure is determined from the relationship between the aspirated air mass, determined by an air-mass meter 4 and the throttle valve angle, determined by a sensor 21. The duty cycle of the valve 17 is changed so that the recycling rate for the exhaust gas, which also depends on the load and the rotational speed of the engine remains essentially constant.

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patent: 5205260 (1993-04-01), Takahashi et al.

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