Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-01-30
1982-11-09
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123340, 123358, F02M 5920, F02P 508, F02M 5106
Patent
active
043579205
ABSTRACT:
A device is proposed for the adjustment of a quantity-metering member of a fuel injection pump in an internal combustion engine with self-ignition, comprising an electric circuit arrangement for a control signal dependent on operating parameters, this signal inffluencing the position of the quantity-metering member via an electromagnetic servo unit wherein the electric circuit arrangement includes at least one series circuit made up of a minimum value selection stage, a maximum value selection stage, and a servo unit controller for the quantity-metering member and the output signals of at least two set-point stages for, in particular, the speed, the smoke limit, equalization, and exhaust gas temperature can be fed to the minimum value selection stage with the maximum value selection stage additionally coupled to a start control stage. In addition to the use of the device as a total controller, i.e., the electric circuit arrangement alone determines the position of the quantity-metering member and no mechanical controller is additionally provided, the device can also be utilized where only a regulated stop for the quantity-metering member, for example a control rod, is present as the control member ("signal mixing"). The purpose of the proposed device is to furnish an electronic speed regulation for idling and for intermediate speeds, beyond the quantity-limiting functions of equalization (limitation of the injection only in dependence on the speed), smoke limit, and exhaust gas temperature limit, in case of a total controller as well as in case of signal mixing with the aid of a controlled servo unit, so that the speed is maintained constant at the preset and/or desired value even in an unstable condition during varying loads, for example, due to the additional connection of auxiliary units.
REFERENCES:
patent: 3888220 (1975-06-01), Bigalke et al.
patent: 4174694 (1979-11-01), Wessel et al.
patent: 4223654 (1980-09-01), Wessel et al.
Flaig Ulrich
Piwonka Fridolin
Stumpp Gerhard
Walz Ludwig
Wessel Wolf
Greigg Edwin E.
Nelli Raymond A.
Robert & Bosch GmbH
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