US3722487A - Apparatus for compensation of the operation of a fuel injection device for an internal combustion engine - Google Patents

Apparatus for compensation of the operation of a fuel injection device for an internal combustion engine Download PDF

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Publication number
US3722487A
US3722487A US00195181A US3722487DA US3722487A US 3722487 A US3722487 A US 3722487A US 00195181 A US00195181 A US 00195181A US 3722487D A US3722487D A US 3722487DA US 3722487 A US3722487 A US 3722487A
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US
United States
Prior art keywords
fuel injection
injection device
engine
suction
atmospheric pressure
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00195181A
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English (en)
Inventor
Y Ohama
H Kogure
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
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Publication of US3722487A publication Critical patent/US3722487A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/02—Controlling by changing the air or fuel supply
    • F02D2700/0217—Controlling by changing the air or fuel supply for mixture compressing engines using liquid fuel
    • F02D2700/0261—Control of the fuel supply
    • F02D2700/0266—Control of the fuel supply for engines with fuel injection

Definitions

  • the suction chamber has front and rear diaphragm walls against which the second spring unit permanently bears, whereas the first spring unit is fixedly supported at its back end while its front end bears against the front wall when the suction pressure is high during low engine load and loses contact therewith when the suction pressure is low during high engine load.
  • a further chamber acting on the rear diaphragm wall and selectively connected by a changeover valve to the atmosphere or to the suction inlet depending on atmospheric pressure.
  • SHEET 10F 2 'NV'TINTORS PATENTEUHARZYIHH 87 SHEET 2 BF 2 INVENTOR 0% @Ma BY h (hm/L kw;
  • the invention relates to the control of a fuel injection device for an internal combustion engine and more particularly to the control of a fuel injection device which is operated by the negative pressure in a suction inlet to the engine.
  • the fuel injection apparatus 6 comprises a plunger type injection pump 9 connected to a fuel tank 7 through a pump 8.
  • a plunger 10 of the injection pump 9 is forced to reciprocate by a rotating cam 12 which is mounted on a rotating shaft 11 driven by the engine 1 so as to be rotatable therewith but slidable relatively thereto.
  • the cam 12 is so formed that the cam height thereof is gradually increased from its front end to its rear end, so that by a slidable movement of the cam 12,
  • the invention specifically relates to apparatus for controlling such fuel injection device to compensate for changes in atmospheric pressure.
  • An object of this invention is to provide an apparatus wherein the atmospheric pressure compensation is effected when the engine is in high load operation but substantially not effected when the engine is in low load operation.
  • two spring units one for low load and the other for high load for controlling the injection amount of fuel in accordance with the negative pressure in the suction inlet to the internal combustion engine, the arrangement being such that during high engine load, the spring unit for low load becomes inoperative and the spring unit for high load undergoes changes in its resilient force in response to change of atmospheric pressure.
  • FIG. 1 is a diagrammatic sectional side view of the apparatus according to the invention.
  • FIG. 2 is a sectional side view of a portion of the apparatus in another condition of operation.
  • numeral 1 denotes an internal combustion engine
  • numeral 2 denotes a suc-
  • the slide movement of the cam 12 is effected by the negative pressure of the engine 1.
  • a diaphragm 14 carries a push rod 13 projecting forwardly therefrom for pushing the cam 12 from behind, and at the rear side of the diaphragm 14 there is formed a negative pressure chamber 15 connected to the suction pressure opening 4.
  • the diaphragm 14 is urged forward by a spring 16 for high load and two springs 17 for low load.
  • the diaphragm 14 is advanced by the pushing action of the springs l6, l7 and accordingly the cam 12 is advanced by push rod 13 so that the plunger 10 is increased in stroke and the injection amount is increased. If, however, the negative pressure is increased, the diaphragm 14 is retracted against the action of the springs 16, 17 and the cam 12 is retracted, so that the stroke of plunger 10 is decreased and the injection amount is decreased.
  • Numeral I8 denotes a spring urging the cam 12 rearward.
  • the rear wall of the negative pressure chamber 15 is formed as a diaphragm 20 urged forward by a spring 19, and at the rear side of diaphragm 20 there is formed a second negative pressure chamber 21.
  • the interior of chamber 21 is selectively connected through a changeover valve 22 to the ambient atmosphere or the suction pressure opening 4.
  • the valve 22 is so arranged that in ordinary condition it is located at one side position to connect the interior of the chamber 21 to the atmosphere but it is moved to the other side position upon actuation of a detecting device 23 by a change in atmospheric pressure, for example,
  • a contact 24 is closed and a solenoid 25 is energized and thereby the valve 22 is moved to its changeover operation.
  • each spring 17 for high load is interposed between the diaphragms 14, 20 so that it will always be in an operative condition, but each spring 17 for low load is held at its base end by a respective stationary receiving seat 26 and each spring 17 has a comparatively short free length, so that if the diaphragm 14 is advanced beyond a predetermined distance, each spring 17 is left in a position separated from the diaphragm 14 as illustrated in FIG. 2.
  • the negative pressure is comparatively small and the diaphragm 14 is advanced such that only the spring 16 is operative as illustrated in FIG. 2.
  • the detecting device 23 is operated by a change of atmospheric pressure and the suction pressure is introduced into the chamber 21, the diaphragm 20 is retracted and the action of spring 16 is decreased, whereby there is caused a change in the operation characteristic feature of the diaphragm l4, and correspondingly in the characteristic feature of the control operation of the injection amount.
  • atmospheric pressure compensation is effected.
  • the apparatus of the invention which broadly contemplates means responsive to the negative pressure in the inlet and acting on the fuel injection device to regulate the amount of fuel injection to the engine, and means responsive to atmospheric pressure and coupled to the first said means to control the action thereof on the fuel injection device, the first said means comprising first and second spring assemblies applying resilient action to the fuel injection device and subjected to negative pressure in the engine such that the first spring assembly is rendered inoperative when the engine is under high load, said second spring assembly being acted on by the second said means to undergo variation in its resilient action on the fuel injection device upon variation in atmospheric pressure whereby under high load only the second spring assembly acts on the fuel injection device and variation in atmospheric pressure has pronounced effect on the fuel injection device whereas under low load both spring assemblies act on the fuel injection device and the effect of the variation in atmospheric pressure is minimized.
  • Apparatus for the compensation of the ope-ration of a fuel injection device for an internal combustion engine comprising means responsive to the negative pressure in the inlet and acting on the fuel injection device to regulate the amount of fuel in injection to the engine, and means responsive to atmospheric pressure and coupled to the first said means to control the action thereof on the fuel injection device, the first said means comprising first and second spring assemblies applying resilient action to the fuel injection device and subjected to negative pressure in the engine such that the first spring assembly is rendered inoperative when the engine is under high load, said second spring assembly being acted on by the second said means to undergo variation in its resilient action on the fuel injection device upon variation in atmospheric pressure whereby under high load only the second spring assembly acts on the fuel injection device and variation in atmospheric pressure has pronounced effect on the fuel injection device whereas under low load both spring assemblies act on the fuel injection device and the effect of the variation in atmospheric pressure is minimized.
  • the first said means comprises a suction chamber connected to the suction inlet to the engine, said suction chamber including a front diaphragm wall coupled to the fuel injection device, said first and second spring assemblies being in said suction chamber, said first spring assembly engaging said diaphragm wall when the suction pressure in the inlet is high during low engine load and being disengaged from said wall when the suction pressure in the inlet is low during high engine load, said second spring assembly being in permanent engagement with said wall.
  • suction chamber includes a rear diaphragm wall against which the second spring assembly is engaged.
  • Apparatus as claimed in claim 4 wherein said means responsive to atmospheric pressure to control the action of the first means on the fuel injection device comprises a second suction chamber behind said rear diaphragm wall, and means responsive to atmospheric pressure for selectively supplying atmospheric pressure or the suction pressure at the engine inlet to said second suction chamber.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
US00195181A 1970-11-30 1971-11-03 Apparatus for compensation of the operation of a fuel injection device for an internal combustion engine Expired - Lifetime US3722487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10487970 1970-11-30

Publications (1)

Publication Number Publication Date
US3722487A true US3722487A (en) 1973-03-27

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ID=14392469

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US00195181A Expired - Lifetime US3722487A (en) 1970-11-30 1971-11-03 Apparatus for compensation of the operation of a fuel injection device for an internal combustion engine

Country Status (7)

Country Link
US (1) US3722487A (de)
AU (1) AU457071B2 (de)
CA (1) CA945854A (de)
DE (1) DE2155115C3 (de)
FR (1) FR2116010A5 (de)
GB (1) GB1357809A (de)
IT (1) IT944831B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916861A (en) * 1972-10-06 1975-11-04 Nippon Denso Co Pneumatic governor system for fuel injection pump
US4388825A (en) * 1977-05-17 1983-06-21 The Bendix Corporation Integral manifold absolute pressure and ambient absolute pressure sensor and associated electronics
US4616615A (en) * 1983-01-18 1986-10-14 Nissan Motor Company, Limited Method and system for controlling idling speed for a Diesel engine
US4864993A (en) * 1988-01-08 1989-09-12 Diesel Kiki Co., Ltd. Boost compensator
US4872437A (en) * 1987-06-29 1989-10-10 Mitsubishi Denki Kabushiki Kaisha Fuel pressure regulator for internal combustion engine
US5785023A (en) * 1996-10-31 1998-07-28 Paxton Products Inc. Supercharged supply fuel control apparatus
US5816217A (en) * 1996-11-25 1998-10-06 Wong; Ping Lun Diesel engine air/fuel ratio controller for black smoke reduction
US11808230B2 (en) 2020-10-09 2023-11-07 Vitesco Technologies GmbH Method for estimating the pressure in an intake manifold

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916861A (en) * 1972-10-06 1975-11-04 Nippon Denso Co Pneumatic governor system for fuel injection pump
US4388825A (en) * 1977-05-17 1983-06-21 The Bendix Corporation Integral manifold absolute pressure and ambient absolute pressure sensor and associated electronics
US4616615A (en) * 1983-01-18 1986-10-14 Nissan Motor Company, Limited Method and system for controlling idling speed for a Diesel engine
US4872437A (en) * 1987-06-29 1989-10-10 Mitsubishi Denki Kabushiki Kaisha Fuel pressure regulator for internal combustion engine
US4864993A (en) * 1988-01-08 1989-09-12 Diesel Kiki Co., Ltd. Boost compensator
US5785023A (en) * 1996-10-31 1998-07-28 Paxton Products Inc. Supercharged supply fuel control apparatus
US5816217A (en) * 1996-11-25 1998-10-06 Wong; Ping Lun Diesel engine air/fuel ratio controller for black smoke reduction
US11808230B2 (en) 2020-10-09 2023-11-07 Vitesco Technologies GmbH Method for estimating the pressure in an intake manifold

Also Published As

Publication number Publication date
AU457071B2 (en) 1975-01-16
IT944831B (it) 1973-04-20
DE2155115A1 (de) 1972-06-15
DE2155115C3 (de) 1974-03-21
GB1357809A (en) 1974-06-26
AU3498071A (en) 1973-05-03
DE2155115B2 (de) 1973-08-23
CA945854A (en) 1974-04-23
FR2116010A5 (de) 1972-07-07

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