Hydraulic injection-adjusting device for high pressure injection

Internal-combustion engines – Charge forming device – With fuel pump

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Details

123500, 123357, 464 3, 464 5, F16D 500, F02M 5920

Patent

active

044508182

ABSTRACT:
A hydraulic injection-adjusting device for high pressure injection installations in auto-igniting internal combustion engines. Oil is supplied to operating chambers of the injection-adjusting device by means of a pressure supply pump with an electrically actuatable regulating valve being provided for controlling the flow of oil to inlet of the operating chambers. An electronic control unit is supplied on an input side which signals corresponding to current engine operating parameters with the control unit yielding on an output side thereof a desired value for the regulating valve to apply pressure in a controlled fashion to the injection-adjusting device. An arrangement is provided for measuring the actual value of the adjustment angle at the injection-adjusting device by constant answer-back line provides a feed of the actual value to the control unit. A control unit, depending on whether the desired value is larger with respect to the actual value or whether the actual value is larger than the desired value, yields a first and second signal of a defined magnitude. A regulating valve is constructed as an electromagnetically operated three-way or three-position valve for regulation of pressure supply, and pressure relief, with the regulating valve being capable of providing a control function when the valve is in a closed position.

REFERENCES:
patent: 3665907 (1972-05-01), Laufer
patent: 3774411 (1973-11-01), Phillips
patent: 4019478 (1977-04-01), Hobo
patent: 4132202 (1979-02-01), Nakayama

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