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Title: Fuel injection system for internal combustion engines

Abstract

A fuel injection system is described for an internal combustion engine, comprising: (a) a fuel injection pump driven by the engine for fuel injection thereto and including a plunger reciprocably movable at a non-uniform speed and a control sleeve slidably fitted on the plunger; (b) first drive means operatively connected with the plunger for rotating the latter to thereby adjust the effective stroke of the plunger; (c) second drive means operatively connected with the control sleeve for displacing the latter in an axial direction to thereby adjust the pre-stroke of the control sleeve; (d) an operation sensor for detecting operating conditions of the engine; (e) a position sensor for detecting a position of the control sleeve; (f) first arithmetic means responsive to the engine operating conditions detected by the operation sensor, for computing an object injection quantity; (g) second arithmetic means responsive to the position of the control sleeve detected by the position sensor, for computing an object pre-stroke of the plunger; (h) third arithmetic means responsive to the engine operating conditions detected and the position of the control sleeve detected, for computing a correction amount; (i) first control means responsive to the correction amount computed by the third arithmeticmore » means, for correcting the object injection quantity and for delivering a control signal to the first drive means; and (j) second control means responsive to the object injection quantity computed by the second arithmetic means, for delivering a control signal to the second drive means.« less

Inventors:
Publication Date:
OSTI Identifier:
7142787
Patent Number(s):
US 4619233
Assignee:
Diesel Kiki Co., Ltd., Tokyo NOV; NOV-85-031058; EDB-87-002314
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 18 Jun 1985
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; FUEL INJECTION SYSTEMS; DESIGN; OPERATION; INTERNAL COMBUSTION ENGINES; COMPUTERIZED CONTROL SYSTEMS; DATA TRANSMISSION SYSTEMS; DISPLACEMENT GAGES; POSITIONING; PUMPS; ROTATION; SIGNALS; CONTROL SYSTEMS; ENGINES; FUEL SYSTEMS; HEAT ENGINES; MEASURING INSTRUMENTS; MOTION; 330100* - Internal Combustion Engines

Citation Formats

Yamaguchi, S. Fuel injection system for internal combustion engines. United States: N. p., 1986. Web.
Yamaguchi, S. Fuel injection system for internal combustion engines. United States.
Yamaguchi, S. Tue . "Fuel injection system for internal combustion engines". United States. doi:.
@article{osti_7142787,
title = {Fuel injection system for internal combustion engines},
author = {Yamaguchi, S.},
abstractNote = {A fuel injection system is described for an internal combustion engine, comprising: (a) a fuel injection pump driven by the engine for fuel injection thereto and including a plunger reciprocably movable at a non-uniform speed and a control sleeve slidably fitted on the plunger; (b) first drive means operatively connected with the plunger for rotating the latter to thereby adjust the effective stroke of the plunger; (c) second drive means operatively connected with the control sleeve for displacing the latter in an axial direction to thereby adjust the pre-stroke of the control sleeve; (d) an operation sensor for detecting operating conditions of the engine; (e) a position sensor for detecting a position of the control sleeve; (f) first arithmetic means responsive to the engine operating conditions detected by the operation sensor, for computing an object injection quantity; (g) second arithmetic means responsive to the position of the control sleeve detected by the position sensor, for computing an object pre-stroke of the plunger; (h) third arithmetic means responsive to the engine operating conditions detected and the position of the control sleeve detected, for computing a correction amount; (i) first control means responsive to the correction amount computed by the third arithmetic means, for correcting the object injection quantity and for delivering a control signal to the first drive means; and (j) second control means responsive to the object injection quantity computed by the second arithmetic means, for delivering a control signal to the second drive means.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 28 00:00:00 EST 1986},
month = {Tue Oct 28 00:00:00 EST 1986}
}
  • 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 system for an internal combustion engine is described, which provides for independent, flexible control of timing as well as quantity of fuel injected. The system is programmable for torque shaping and adaptable to a wide range of engine sizes. It uses piezoelectric valves for controlling injection timing, a shuttle, fuel meter, and a gas driven high pressure pump for injecting the fuel into the cylinders.
  • A fuel injection system is described for use with an internal combustion engine have cylinders, comprising: fuel injections valves mounted, respectively, in the cylinders; fuel pressurizing means; fuel passages each connecting a corresponding one of the fuel pressurizing means with a corresponding one of the fuel injection valves; delivery valves arrange, respectively, across the fuel passages; a communication passage connecting at both ends thereof a first one of the fuel passages corresponding to one of the cylinders which is to be fired earlier, to a second one of the fuel passages corresponding to another one of the cylinders which ismore » to be fired later. Each is at a location between one of the fuel injection valves and a corresponding one of the delivery valves associated with the first and second fuel passages; the delivery valves each having an outlet port, the communication passage being connected at both ends thereof to the first and second fuel passages each at a location in the vicinity of the outlet port of a corresponding one of the delivery valves; and a selector valve arranged between the first fuel passage and the communication passage for selectively connecting one of the delivery valves across the first one fuel passage with the communication passage in a predetermined low load and low speed region of the engine.« less
  • A fuel injection system is described for an engine having combustion chamber means and intake passage means leading to the combustion chamber means. The fuel injection system consists of first and second fuel injection valve means located in the intake passage means so that one of the fuel injection valve means is closer to the combustion chamber means than the other, control means for producing first synchronized fuel injection pulses which are produced at timings synchronized with engine rotation throughout an engine operating range including light load engine operation and heavy load engine operation and adapted to be applied tomore » the first fuel injection valve means to actuate the same. It is also for producing second synchronized fuel injection pulses which are produced at timing synchronized with the engine rotation only during heavy load engine operation and adapted to be applied to the second fuel injection valve means to actuate the same.« less