US3910245A - Fuel compensating device for a supercharged type diesel engine - Google Patents

Fuel compensating device for a supercharged type diesel engine Download PDF

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Publication number
US3910245A
US3910245A US514245A US51424574A US3910245A US 3910245 A US3910245 A US 3910245A US 514245 A US514245 A US 514245A US 51424574 A US51424574 A US 51424574A US 3910245 A US3910245 A US 3910245A
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US
United States
Prior art keywords
pressure receiving
fuel
receiving member
compensating device
connecting member
Prior art date
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
Application number
US514245A
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English (en)
Inventor
Rikuo Okura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Corp
Original Assignee
Diesel Kiki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Diesel Kiki Co Ltd filed Critical Diesel Kiki Co Ltd
Application granted granted Critical
Publication of US3910245A publication Critical patent/US3910245A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/06—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid
    • F02D1/065—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid of intake of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D23/00—Controlling engines characterised by their being supercharged
    • F02D23/02—Controlling engines characterised by their being supercharged the engines being of fuel-injection type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a fuel compensating device which is attached to a fuel injection pump and compensates, in response to supercharging air pressure, fuel supplying to a supercharged type diesel engine.
  • An object of the present invention is to provide a fuel compensating device which eliminates these defects and can effect supercharging in response to the requirements of an engine at low speed supercharging and engine starting.
  • Other objects of the present invention is to provide a fuel compensating device which is simple in construction and may be constructed as a unit so that it can be used in combination with an injection pump and a governor without disturbrance of shape of the injection pump and kind and shape of the governor.
  • FIG. 1 is a vertical sectional view of an embodiment of the present invention and FIG. 2 shows characteristic curves at idling of the engine and of the device shown in FIG. 1.
  • a case 2 to a side surface of fuel injection pump 1 (to the other side surface of which is normally fixed a governor) is fixed a case 2 by bolts 3.
  • the case comprises three stepped chambers, a large diameter chamber 4, an intermediate diameter chamber 5 and a small diameter chamber 6.
  • a high pressure receiving member or a piston 7 To the large diameter chamber 4 is fitted a high pressure receiving member or a piston 7 which is movable stroke S.
  • the outer portion of the small diameter chamber 6 and the inner portion integral with the intermediate diameter chamber 5 are partitioned by a low pressure receiving member or a diaphragm 8.
  • the piston 7 and the diaphragm 8 are connected by a connecting member or a bolt 9.
  • spring receiving washers 10 which are movable distance L in the direction of the piston 7 are engaged with the stepped portion by a compression spring 11.
  • a compression spring 12 which urges the piston 7 to the right in FIG. 1.
  • a boss 13 of the piston 7 abuts on the spring receiving washers 10 after the washers move distance L, forming a stopper against the action of the bolts 9 and thus the diaphragm 8.
  • a lever 14 is swingably combinated at one end with the bolt 9 by a pin 15 and supported on a pin 16 provided on the case 2 as a fulcrum and at the other end engages a fuel control rack 17 of an injection pump, forming a stopper against movement of the control rack 17 in the fuel increasing direction.
  • Conducts l8 and 19 respectively are adapted to introduce engine supercharging pressure to the small diameter chamber 6 and the large diameter chamber 4.
  • the engine supercharging pressure is introduced through the conduits 18 and 19 to the large diameter chamber 4 and the small diameter chamber 6 and then the piston 7 compresses the spring 12 by the force responsive to area difference between the piston 7 and the diaphragm 8, moves the diaphragm 8 and the bolt 9 together stroke S to the left in FIG. 1 and is stopped abutting on the stepped portion of the large diameter chamber 4.
  • the spring 11 keeps distance L without compression due to set load so that the stroke S of the piston 7 is transmitted through the bolt 9 to the lever 14 which is swung anticlockwise and thus a stop position of the control rack 17 is determined accordingly. This is indicated on a line b in FIG. 2 in which abscissa is control rack position R and ordinate is engine rotation speed N.
  • the spring 12 and a governor idling spring are adapted to have characteristic comfirming to the requirement of the engine.
  • a heavy set load of the spring 12 makes a characteristic the line a.
  • the line a shows fuel increase at the low speed and starting, the line b shows smoke limit at nonsupercharging, the line c shows fuel supercharge at high speed, line d shows smoke limits and line e shows upper limits of rotation in the control characteristic curve.
  • a fuel compensating device for a supercharged type diesel engine comprising three stepped chambers forming a case, a large pressure receiving member and a small pressure receiving member reciprocable in the chambers by supercharging air pressure of the engine and spring forces, a connecting member connecting the pressure receiving members coaxially and provided with springs therebetween and a lever serving as a stopper in the fuel increasing direction for a fuel control rack in a fuel injection pump and being connected with the connecting member so that in low supercharging pressure the small pressure receiving member and the connecting member are movable by movement of the large pressure receiving member and in high supercharging pressure the connecting member alone is movable by the small pressure receiving member.
  • a fuel compensating device according to claim 1 wherein a spring is provided between the large pressure receiving member and a stepped portion of the intermediate chamber.
  • a fuel compensating device according to claim 1 wherein an another spring is provided between the large pressure receiving member and a stpped portion of the connecting member.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
US514245A 1973-10-17 1974-10-11 Fuel compensating device for a supercharged type diesel engine Expired - Lifetime US3910245A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11573973A JPS5316851B2 (enrdf_load_stackoverflow) 1973-10-17 1973-10-17

Publications (1)

Publication Number Publication Date
US3910245A true US3910245A (en) 1975-10-07

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ID=14669864

Family Applications (1)

Application Number Title Priority Date Filing Date
US514245A Expired - Lifetime US3910245A (en) 1973-10-17 1974-10-11 Fuel compensating device for a supercharged type diesel engine

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US (1) US3910245A (enrdf_load_stackoverflow)
JP (1) JPS5316851B2 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068642A (en) * 1975-11-14 1978-01-17 Caterpillar Tractor Co. Fuel ratio control with manually operated air override
US4086898A (en) * 1975-07-05 1978-05-02 Lucas Industries Limited Fuel pumping apparatus
US4099506A (en) * 1975-11-28 1978-07-11 Daimler-Benz Aktiengesellschaft Idling abutment for the governor of an injection pump of an air-compressing internal combustion engine
US4421076A (en) * 1980-05-23 1983-12-20 Nissan Motor Co., Ltd. Starting auxiliary device for internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577969A (en) * 1969-06-23 1971-05-11 Caterpillar Tractor Co Variable governor limiting mechanism
US3707144A (en) * 1971-07-01 1972-12-26 Ambac Ind Fuel control device for fuel injection pump governors
US3795233A (en) * 1972-05-19 1974-03-05 Caterpillar Tractor Co Fuel-air ratio control for supercharged engines
US3814072A (en) * 1972-06-06 1974-06-04 Woodward Governor Co Manifold pressure controller fuel limiter
US3818883A (en) * 1969-07-28 1974-06-25 Caterpillar Tractor Co Isochronous governor
US3820519A (en) * 1972-10-02 1974-06-28 Nippon Denso Co Pneumatic rpm regulator for fuel injection pumps

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577969A (en) * 1969-06-23 1971-05-11 Caterpillar Tractor Co Variable governor limiting mechanism
US3818883A (en) * 1969-07-28 1974-06-25 Caterpillar Tractor Co Isochronous governor
US3707144A (en) * 1971-07-01 1972-12-26 Ambac Ind Fuel control device for fuel injection pump governors
US3795233A (en) * 1972-05-19 1974-03-05 Caterpillar Tractor Co Fuel-air ratio control for supercharged engines
US3814072A (en) * 1972-06-06 1974-06-04 Woodward Governor Co Manifold pressure controller fuel limiter
US3820519A (en) * 1972-10-02 1974-06-28 Nippon Denso Co Pneumatic rpm regulator for fuel injection pumps

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086898A (en) * 1975-07-05 1978-05-02 Lucas Industries Limited Fuel pumping apparatus
US4068642A (en) * 1975-11-14 1978-01-17 Caterpillar Tractor Co. Fuel ratio control with manually operated air override
US4099506A (en) * 1975-11-28 1978-07-11 Daimler-Benz Aktiengesellschaft Idling abutment for the governor of an injection pump of an air-compressing internal combustion engine
US4421076A (en) * 1980-05-23 1983-12-20 Nissan Motor Co., Ltd. Starting auxiliary device for internal combustion engine

Also Published As

Publication number Publication date
JPS5076435A (enrdf_load_stackoverflow) 1975-06-23
JPS5316851B2 (enrdf_load_stackoverflow) 1978-06-03

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