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Title: Fuel injection system

Abstract

This patent describes a fuel injection system for a diesel engine comprising: condition detection means for detecting operating conditions of the diesel engine including a rotational position thereof; low pressure fuel supply means for supplying fuel at a low pressure at an output port thereof; high pressure fuel pump means, having a pump chamber communicating with the output port of the low pressure fuel supply means, and plunger means reciprocable within the pump chamber for introducing fuel from the output port of the low pressure fuel supply means into the pump chamber during a movement in a predetermined direction of the plunger means and for pressurizing the introduced fuel during a movement of the plunger means in the opposite direction so that pressurized fuel is delivered from the high pressure fuel pump means at an output port thereof; common rail fuel storage means, connected to the output port of the high pressure fuel pump means, for storing pressurized fuel delivered from the high pressure pump therein at a substantially continuous pressure.

Inventors:
; ;
Publication Date:
OSTI Identifier:
6526079
Patent Number(s):
US 4777921
Assignee:
Nippondenso Co., Ltd., Kariya NOV; NOV-89-034483; EDB-89-026390
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 1 May 1987
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; DIESEL ENGINES; FUEL INJECTION SYSTEMS; VALVES; CONTROL EQUIPMENT; DESIGN; DETECTION; DIESEL FUELS; ELECTRICAL EQUIPMENT; HYDRAULICS; METERS; OPERATION; PRESSURIZING; PUMPS; STORAGE; ENGINES; EQUIPMENT; FLOW REGULATORS; FLUID MECHANICS; FUEL SYSTEMS; HEAT ENGINES; INTERNAL COMBUSTION ENGINES; MEASURING INSTRUMENTS; MECHANICS; PETROLEUM PRODUCTS; 330102* - Internal Combustion Engines- Diesel

Citation Formats

Miyaki, M., Iwanaga, T., and Fujisawa, H. Fuel injection system. United States: N. p., 1988. Web.
Miyaki, M., Iwanaga, T., & Fujisawa, H. Fuel injection system. United States.
Miyaki, M., Iwanaga, T., and Fujisawa, H. Tue . "Fuel injection system". United States. doi:.
@article{osti_6526079,
title = {Fuel injection system},
author = {Miyaki, M. and Iwanaga, T. and Fujisawa, H.},
abstractNote = {This patent describes a fuel injection system for a diesel engine comprising: condition detection means for detecting operating conditions of the diesel engine including a rotational position thereof; low pressure fuel supply means for supplying fuel at a low pressure at an output port thereof; high pressure fuel pump means, having a pump chamber communicating with the output port of the low pressure fuel supply means, and plunger means reciprocable within the pump chamber for introducing fuel from the output port of the low pressure fuel supply means into the pump chamber during a movement in a predetermined direction of the plunger means and for pressurizing the introduced fuel during a movement of the plunger means in the opposite direction so that pressurized fuel is delivered from the high pressure fuel pump means at an output port thereof; common rail fuel storage means, connected to the output port of the high pressure fuel pump means, for storing pressurized fuel delivered from the high pressure pump therein at a substantially continuous pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 18 00:00:00 EDT 1988},
month = {Tue Oct 18 00:00:00 EDT 1988}
}
  • 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
  • The invention discloses an electronic system for fuel injection in internal combustion engines of the fuel injection type including a system which modifies the pulse length of the fuel injection control pulses by integration of an on-off signal delivered from an air/fuel ratio sensor wherein the integration time constant is varied in accordance with the frequency of the on-off signal from the air/fuel ratio sensor so tha the rate of increasing the injection quantity of fuel is increased in accordance with an increase in the engine intake air flow.
  • A fuel injection control system for an internal combustion engine comprising: a plurality of fuel injection valves for injecting fuel to respectively engine cylinders; a first sensor means for monitoring engine load to produce a first sensor signal indicative thereof; a second sensor means for monitoring crank shaft angular position for producing a second sensor signal; a third means for monitoring engine speed to produce an engine speed indicative data; and a control unit for controlling operation of each of the fuel injection valves to perform controlled amount of fuel injection at first and second injection timings in one enginemore » revolution cycle.« less
  • An electronic fuel injection control system adapted for combination with a fuel injection valve, which comprises means for regulating the valve opening pressure of the injection nozzle of the fuel injection valve, means for regulating the injection timing of the injection nozzle, means for detecting the operating condition of an engine associated with the fuel injection valve, and means responsive to the output of the detecting means for electronically controlling the valve opening pressure regulating means and the injection timing regulating means. The electronic control means is adapted to control the valve opening pressure regulating means and the injection timingmore » regulating means so as to obtain an injection rate, an injection timing and an injection period appropriate for the operating condition of the engine. The electronic fuel injection control system according to the invention may further include means for regulating the injection pressure of the injection nozzle, which is arranged to be controlled by the electronic control means so as to obtain an injection rate appropriate for the operating condition of the engine in cooperation with the valve opening pressure regulating means.« less
  • A spark ignition fuel injection reciprocatory internal combustion engine with dual induction system has within a cylinder head a primary intake passage to direct air fuel mixture charge into a cylinder to swirl therein and a secondary intake passage to direct air charge into the cylinder in such a direction as to impede the swirling motion of the air fuel mixture charge, thereby to maintain the volumetric efficiency of the engine at a sufficiently high level. A fuel injector is so positioned as to discharge fuel into the primary intake passage. An air flow sensor is provided upstream of primarymore » and secondary throttle valves to detect the total of flow of induction air fed to the engine so that fuel is discharged at a rate proportional to the total induction air flow. Under engine operating conditions when only the primary throttle valve opens, air fuel mixture charge will swirl at a sufficiently high rate as to enhance evaporation and dispersion of fuel droplets. Under engine operating conditions when both the primary and secondary throttle valves open, the air fuel mixture charge issuing from the primary intake passage is enriched and air charge from the secondary intake passage impedes swirling motion of enriched air fuel mixture charge from the primary intake passage to enhance evaporation and dispersion of fuel droplets.« less