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

Fuel compensating device for a supercharged type diesel engine Download PDF

Info

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
Authority
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
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

Links

Images

Classifications

    • 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.

Abstract

A fuel compensating device for a supercharged type diesel engine comprising large and small pressure receiving members in chambers, a connecting member connecting the pressure receiving members, a lever connected with the connecting member whereby a stopped position of the control rack is displaced at positions corresponding to smoke limit at non-supercharging and high supercharging of the control rack and increased quantity position at starting.

Description

United States Patent [191 Okura Oct. 7, 1975 FUEL COMPENSATING DEVICE FOR A SUPERCHARGED TYPE DIESEL ENGINE [75] Inventor: Rikuo Okura, Kawagoe, Japan [73] Assignee: Diesel Kiki Kabushiki Kaisha,
Tokyo, Japan 22 Filed: Oct. 11, 1974 21 Appl. No.: 514,245
[30] Foreign Application Priority Data Oct. 17, 1973 Japan 48-115739 [52] US. Cl. 123/140 MP,123/140 MC,
123/139 ST, 123/179 L [51] Int. C1. .....F02D 1/04; F02D 1/06; F02B H10 [58] Field of Search 60/597, 601, 603; 123/139 ST, 179 L, 179 G, 140 J, 140 MP [56] References Cited UNITED STATES PATENTS 3,577,969 5/1971 Morton 123/140 MP 3,707,144 12/1972 Galis et a1. 123/179 L 3,795,233 3/1974 Crews et al. 123/140 MP 3,814,072 6/1974 Gillespie 123/139 ST 3,818,883 6/1974 Glassey 123/140 MP 3,820,519 6/1974 Suda et a1. 123/140 MP Primary ExaminerWendell E. Burns Assistant Examiner-James W. Cranson, Jr. Attorney, Agent, or FirmHenry R. Lerner 57] ABSTRACT 3 Claims, 2 Drawing Figures US. Patent Oct. 7,1975 3,910,245
FUEL COMPENSATING DEVICE FOR A SUPERCHARGED TYPE DIESEL ENGINE 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.
In a supercharged type diesel engine various devices for compensating fuel in response to variation of amount of supercharging air were already proposed. As these devices are exclusively directed to the compensating of heavy load and high speed, the compensating of low speed is not sufficient and particularly increase of fuel at starting is not effected automatically.
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.
In order that the present invention may be more readily understood, reference will now be made to the accompanying drawing in which:
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.
Referring now to FIG. 1, 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. 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. To a stepped portion at the intermediate portion of the bolt 9 is attached 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. Between a stepped portion of the intermediate diameter chamber 5 and the piston 7 is mounted 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 operation of this device is as follows:
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. In this time 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. As supercharging pressure is further increased, the pressure in the small diameter chamber 6 acting on the deaphragm 8 over comes a set force of the spring 11 and moves the bolt 9 distance L to the right in FIG. 1, this being indicated on a line C in FIG. 2, so as to swing the lever 14 clockwise. Therefore the stop position of the control rack 17 is moved in the arrow direction (fuel increasing direction) in FIG. 1, this being indicated by a line (1 in FIG. 2. If supercharging pressure lowers from a state of the line b, the piston 7 acts stroke S to the right by the force of the spring 12 so that the stop position of the rack 17 moves in the arrow direction by the clockwise rotation of the lever 14. This is indicated by a line a or a in FIG. 2. The spring 12 and a governor idling spring are adapted to have characteristic comfirming to the requirement of the engine. For example 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.
I claim:
1. 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.
2. 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.
3. 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.

Claims (3)

1. 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.
2. 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.
3. 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.
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 (en) 1973-10-17 1973-10-17

Publications (1)

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

Family

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

Country Status (2)

Country Link
US (1) US3910245A (en)
JP (1) JPS5316851B2 (en)

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
JPS5316851B2 (en) 1978-06-03
JPS5076435A (en) 1975-06-23

Similar Documents

Publication Publication Date Title
US4038958A (en) Fuel injection pump governor
US2708921A (en) Control device for combustion engines
US3020776A (en) Vacuum refrence control for pressure compensation
US4015573A (en) Supercharged diesel engine fuel injection pump governor assembly
US2559859A (en) Supercharged engine control
US3910245A (en) Fuel compensating device for a supercharged type diesel engine
US2470366A (en) Automatic spark advance mechanism
US4364369A (en) Method and apparatus for recirculating exhaust gases in diesel engine
GB1254394A (en) Improvements in speed governors
US4054112A (en) Fuel injection governor
US3659570A (en) Centrifugal governor for injection internal combustion engines
US2988074A (en) Engine device for reducing unburned hydrocarbons
US3139079A (en) Centrifugal distributor with integral governor control valve
US3353524A (en) Method of operating an automotive engine
US2517501A (en) Overspeed prevention device for internal-combustion engines
US3788291A (en) Unitized distributor vacuum spark advance control valve with regulator
US4120275A (en) Engine fuel injection pump governor
US3895619A (en) Governors for fuel pumps
GB2107779A (en) Charging-pressure-dependent control device for turbo charged injection-type internal combustion engines
FR2451463A1 (en) FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES WITH A HYDRAULIC ROTATION SPEED REGULATOR
US2884919A (en) Fuel injection pumps for internal combustion engines
US2927570A (en) Fuel injection system
US3623383A (en) Hydraulic linkage system
US4458647A (en) Mixture compressing internal-combustion engine including an anti-knocking device
US4736721A (en) Boost compensator for use with internal combustion engine with supercharger