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Title: Fuel injection pumps

Abstract

A fuel injection pump of the rotary distributor type includes a cam actuated plunger housing in a bore and an adjustable fuel control member which varies the amount of fuel supplied to the bore. The pump also includes a timing piston connected to the cam, the piston being biased by a spring against the action of fuel under pressure. In order to vary the timing under certain conditions a control piston serves as an abutment for the spring and the application of pressure to the control piston is controlled by a valve which has a valve element coupled to a throttle member of the pump the valve having a housing which is secured on the exterior of the pump.

Inventors:
Publication Date:
OSTI Identifier:
5386556
Patent Number(s):
US 4508489
Assignee:
Lucas Industries Public Limited Co. (United Kingdom) EDB-85-147705
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 20 Dec 1983, United Kingdom of Great Britain and Northern Ireland (UK); Other Information: PAT-APPL-563377
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; FUEL INJECTION SYSTEMS; PUMPS; INTERNAL COMBUSTION ENGINES; PISTONS; SPRINGS; VALVES; CONTROL EQUIPMENT; ENGINES; EQUIPMENT; FLOW REGULATORS; FUEL SYSTEMS; HEAT ENGINES; MACHINE PARTS; 330603* - Vehicle Design Factors- Engine System; 330100 - Internal Combustion Engines

Citation Formats

Howes, P. Fuel injection pumps. United States: N. p., 1985. Web.
Howes, P. Fuel injection pumps. United States.
Howes, P. Tue . "Fuel injection pumps". United States. doi:.
@article{osti_5386556,
title = {Fuel injection pumps},
author = {Howes, P.},
abstractNote = {A fuel injection pump of the rotary distributor type includes a cam actuated plunger housing in a bore and an adjustable fuel control member which varies the amount of fuel supplied to the bore. The pump also includes a timing piston connected to the cam, the piston being biased by a spring against the action of fuel under pressure. In order to vary the timing under certain conditions a control piston serves as an abutment for the spring and the application of pressure to the control piston is controlled by a valve which has a valve element coupled to a throttle member of the pump the valve having a housing which is secured on the exterior of the pump.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 02 00:00:00 EST 1985},
month = {Tue Apr 02 00:00:00 EST 1985}
}
  • This patent describes an injection timing control device for combination with a fuel injection pump for an internal combustion engine, the pump being of the type having a suction space filled with fuel under pressure variable as a function of the rotational speed of the engine, a pumping and distributing plunger, and a roller holder carrying rollers circumferentially arranged and disposed in camming engagement with the plunger the injection timing control device comprising: a cylinder; a timer piston slidably received within the cylinder. The timer piston is coupled to the roller holder such that displacement thereof causes a corresponding changemore » in the cicumferential position of the roller holder,; a first chamber defined at one end of the timer piston; a second chamber defined at one end of the timer piston; a second chamber defined at an opposite end of the timer piston.« less
  • This patent describes a fuel injection control system for an internal combustion engine comprising: a first sensor producing a first sensor signal representative of the angular position of the crank shaft; a second sensor producing a second sensor signal representative of preselected engine operating parameters; a third sensor detecting whether engine operating conditions satisfy a predetermined fuel cut-off condition and if so, producing a third sensor signal; fourth means for deriving a fuel injection amount on the basis of a value of the second sensor signal and producing a fuel injection control signal having a value indicative of the derivedmore » fuel injection amount; fifth means for disabling the fourth means in the presence of the third sensor signal and for resumption operation of the fourth means after the third sensor signal ends, sixth means for deriving fuel injection timing and producing an injection timing control signal, wherein the first sensor signal includes a first pulse train representative of predetermined angular positions of the crank shaft and a second pulse train representative of predetermined units of rotation of the crank shaft. The sixth means counts the pulses of the first and second pulse trains, produces the injection timing signal when the first pulses and second pulses reach given values and presets the first and second counter values to the first and second value in response to the third sensor signal.« less
  • In a control equipment for adjusting the moment of fuel injection and/or the amount of fuel accumulator is provided between an adjusting member for the begin of fuel supply and/or for the amount of fuel supplied and an electrical servomotor, said energy accumulator comprising two mutually movable spring collars between which is accomodated a pre-stressed compression spring and the maximum distance of which one from the other is limited by abutments of a housing surrounding the spring collars.
  • An apparatus is described for controlling the timing of injection of fuel supplied to an internal combustion engine from a fuel injection pump having a member for adjusting the timing of injection of fuel, the apparatus comprising: means for operating the member; a first means for generating a first signal relating to the actual timing of injection of fuel supplied from the fuel injection pump; a second means for generating a second signal relating to the target timing of injection of fuel determined by the condition of operation of the internal combustion engine; means responsive to the first and secondmore » signals for generating an actuating signal for driving the operating means so as to make the actual timing of injection coincident with the target timing of injection by closed loop control; a third means for producing a third signal for driving the operating means, the third signal being representative of a normal operating condition of the engine but unrelated to the actual timing of injection; means for detecting whether or not the internal combustion engine is being operated in a predetermined low engine speed range; and means responsive to the detected result of the detecting means for selectively applying the actuating signal or the third signal to the operating means so as to select the third signal when the engine speed is within the predetermined low engine speed range and the actuating signal when the engine is not within the predetermined low engine speed range.« less
  • An apparatus is described for controlling a fuel injection advance angle of a fuel injection pump having a hydraulic type timer with a solenoid valve connected with an injection advance angle adjusting member of the fuel injection pump. The apparatus consists of: a first means for generating a first signal showing a target injection advance angle for closed-loop control for the condition of operation of an internal combustion engine associated with the fuel injection pump; a second means for generating a feedback signal related to the actual injection advance angle; a third means responsive to the first signal and themore » feedback signal for producing a first control signal for controlling the solenoid valve so as to be in one state of opening or closing when the actual injection advance angle is substantially coincident with the desired target injection advance angle, and to be in the other state of opening or closing when they are not substantially coincident; means for generating a second signal showing the target injection advance angle for open-loop control according to the condition of operation of the internal combustion engine; means responsive to the second signal for generating a second control signal, which is a pulse signal having a duty cycle determined in accordance with the second signal, for controlling the average opening of the solenoid valve so as to obtain the optimum injection advance angle; a detecting means for detecting whether or not the feedback signal is in normal condition; and a signal changeover means which is responsive to the result detected by the detecting means and supplies the first control signal to the solenoid valve when the feedback signal is in normal condition and supplies the second control signal to the solenoid valve when the feedback signal is not in the normal condition.« less