Control for operating mixture in internal combustion engines

Details Control for operating mixture in internal combustion engines Control for operating mixture in internal combustion engines

1980-09-19

1982-05-04

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

123452, 123454, F02M 2506

Patent

active

043276997

ABSTRACT:
An apparatus is proposed for the open-loop control of the composition of the operating mixture to be introduced into the combustion chambers of an internal combustion engine. In this apparatus, the dispensing of the aspirated air quantity is effected by means of an aspirated air throttle device, whose displacement complementarily adjusts the cross section of an exhaust gas recirculation line which discharges into the intake system downstream from this throttle device. The opening of the aspirated air throttle device in order to increase the quantity of aspirated air is effected by means of a control pressure delivered to a servomotor, counter to the force of a restoring spring. The control pressure is obtained from the comparison of the actual quantity of aspirated air with the fuel injection quantity. The initial pressure for establishing the control pressure is the supply pressure of a supply pump supplying the fuel metering device. In order to prevent the throttle device for aspirated air from being moved into the closed position during starting of the engine, an additional adjusting device, also actuated by fuel supply pressure, is provided. When supply pressure is absent, this adjusting device moves the aspirated air throttle device into the opening direction counter to the restoring force. At the same time, the outlet opening of the exhaust recirculation line is closed as a result.

REFERENCES:
patent: 4031873 (1977-06-01), Banzhaf et al.
patent: 4196708 (1980-04-01), May et al.
patent: 4205645 (1980-06-01), Eheim
patent: 4228773 (1980-10-01), Stumpp et al.
patent: 4230080 (1980-10-01), Stumpp et al.

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