US3750636A - Apparatus for the control of fuel injection for an internal combustion engine - Google Patents

Apparatus for the control of fuel injection for an internal combustion engine Download PDF

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Publication number
US3750636A
US3750636A US00213267A US3750636DA US3750636A US 3750636 A US3750636 A US 3750636A US 00213267 A US00213267 A US 00213267A US 3750636D A US3750636D A US 3750636DA US 3750636 A US3750636 A US 3750636A
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US
United States
Prior art keywords
negative pressure
pressure chamber
fuel injection
engine
throttle valve
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
US00213267A
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English (en)
Inventor
T 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.)
Honda KK
Original Assignee
Honda KK
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 Honda KK filed Critical Honda KK
Application granted granted Critical
Publication of US3750636A publication Critical patent/US3750636A/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
    • 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

  • An object of the invention is toprov ide control apparatus for a fuel injection type internal combustion engine by whichthe amount of fuel injection can be made dependent on engine speed after the throttle has been opened wide.
  • the second governor is connected to the suction inlet of the engine via a passageway containing a valve which is opened when the throttle valve is opened wide. Thereupon, the second governor can override the action of the first governor on the fuel injection pump so that the amount of fuel delivered to the engine will be made responsive to engine speed.
  • FIGURE of the drawing is a longitudinal sectional view through apparatus according to this invention.
  • a control casing I is divided at one side into first and second negative pressure chambers 4, 5 by diaphragms 2. 3, and the first negative pressure chamber 4 is in communication through a boost pipe 6 with the interior of a suction pipe 7 of an internal combustion engine E. Hence, the interior of the first negative pressure chamber 4 is subjected to the negative pressure produced behind a throttle valve 8 in suction pipe 7.
  • a branch pipe 9 diverges from the middle portion of the boost pipe 6 and is in communication with the second negative pressure chamber 5.
  • the branch pipe 9 is provided with a valve 10 for opening and closing the branch pipe 9.
  • a valve body 12 of valve 10 is positioned to be operated by a cam 13, mounted on a shaft coaxial with and rigidly coupled to a rotating shaft 8' integral with the throttle valve 8', so that the valve 10 is opened at the timeof full opening of the throttle valve 8.
  • the interior of the valve 10 is in communica tion with atmospheric air through a throttle 11.
  • a first governor spring 14 is mounted under stress within the first negative pressure chamber 4, so that this first governor spring 14 serves to urge the diaphragm 2 to the right in the drawing against the action of the suction negative pressure force which is produced within the first negative pressure chamber 4.
  • a second governor spring 14 is mounted under stress within the second negative pressure chamber 15, so
  • a shaft l6,rotated by the operation of the engine E, is supported by the casing I, and a control cam 17 for operating a fuel injection pump P is mounted on the periphery of rotating shaft 16 so as to slidable in the axial direction.
  • the control cam 17 is coupled with a pin 19 passing through slits 18 in the rotating shaft 16, so that the cam 17 can be rotated togetherwith the rotating shaft 16 within the range of the length of vthe slits 18.
  • a sliding member 21 is coupled with the pin 19' and is mounted within a hollow portion 20 of the rotating shaft 16.
  • the outer end of sliding member 21' faces an end surface of a first actuator or governor shaft 22 connected to the diaphragm 2 and it also faces an end portion of a second actuator or governor shaft 23 connected to the diaphragm and mounted slidably on the first governorshaft 22.
  • a spring 24 is mounted in the hollow portion 20 to urge the control cam 17 to the left, that is, in a direction to decrease-the amount of fuel injected.
  • a plunger 25 of the fuel injection pump P is mounted in the control casing I so as to be movable up and down, and the lower end of plunger 25 is in pressure contact with the cam surface of the control cam 17 by the action of a return spring 26.
  • the inlet side of the fuel injection pump P is connected to a feed pump 28 connected to afuel tank 27, and the outlet side of the fuel injection pump 'P is connected to a fuel injection nozzle 29 projecting into the suction pipe 7.
  • the amount of fuel injection after the throttle valve has been opened wide can be controlled in accordance with engine speed.
  • the cam 13 is rotated therewith and opens the valve whereby the interior of the second negative pressure chamber 5 is placed into communication with the interior of the suction pipe 7.
  • a fuel injection type internal combustion engine having a fuel injection pump with control means regulating the fuel delivery thereof to the engine in response to suction pressure in a first negative pressure chamber connected to a suction inlet leading to the engine and provided with a throttle valve
  • governor means coupled to the control means to operate the fuel pump to increase fuel delivery upon increase of engine speed when the throttle valve is wide open, said governor means comprising a second negative pressure chamber coupled to said control means, a passageway connecting the second negative pressure chamber and the suction inlet, and valve means in said passageway for being opened when the throttle valve is wide open, and means connected to the valve means and the throttle valve to open said valve means when the throttle valve is wide open.
  • control means comprises a displaceable control member, a first actuator coupled to the first negative pressure chamber and facing said control member to displace the same in accordance with the suction pressure in the first negative pressure chamber, and a second actuator facing said control member to displace the same in accordance with the suction pressure in the second negative pressure chamber.
  • An improvement as claimed in claim 3 comprising displaceable diaphragms bounding each negative pressure chamber, the actuators being connected to respective diaphragms.
  • An improvement as claimed in claim 5 comprising a stressed spring in each negative pressure chamber acting-on the respective diaphragms, the spring in the first chamber acting-on the associated diaphragm to displace the first actuator and the control memberin a direction to increase the amount of fuel delivery to the engine, the spring in the second chamber acting on the associated diaphragmto displace the second actuator and th e control member in a direction to decrease the amount of fuel delivery to the engine.

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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)
US00213267A 1970-12-31 1971-12-29 Apparatus for the control of fuel injection for an internal combustion engine Expired - Lifetime US3750636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45123276A JPS5014688B1 (enrdf_load_stackoverflow) 1970-12-31 1970-12-31

Publications (1)

Publication Number Publication Date
US3750636A true US3750636A (en) 1973-08-07

Family

ID=14856547

Family Applications (1)

Application Number Title Priority Date Filing Date
US00213267A Expired - Lifetime US3750636A (en) 1970-12-31 1971-12-29 Apparatus for the control of fuel injection for an internal combustion engine

Country Status (4)

Country Link
US (1) US3750636A (enrdf_load_stackoverflow)
JP (1) JPS5014688B1 (enrdf_load_stackoverflow)
AU (1) AU463571B2 (enrdf_load_stackoverflow)
CA (1) CA945853A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090487A (en) * 1975-10-07 1978-05-23 Robert Bosch Gmbh Fuel injection system
US4165348A (en) * 1976-08-26 1979-08-21 Chiyoda Chemical Engineering And Construction Company Ltd. Apparatus for fuel supply to spark ignition type internal combustion engine
US4534329A (en) * 1982-11-11 1985-08-13 Fiat Auto S.P.A. Supply system for super charged diesel engines
US20030111062A1 (en) * 2001-12-13 2003-06-19 Brandenburg Billy J. Pressure actuated fuel vent closure and fuel shutoff apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6118947U (ja) * 1984-07-10 1986-02-03 章宏 上田 携帯用発電機
JPS61104239U (enrdf_load_stackoverflow) * 1984-12-14 1986-07-02

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562656A (en) * 1946-03-26 1951-07-31 Max L Blakeslee Fuel system for internal-combustion engines
US2569664A (en) * 1947-11-05 1951-10-02 American Bosch Corp Combined mechanical and pneumatic governor
US3077873A (en) * 1961-08-04 1963-02-19 Caterpillar Tractor Co Pressure actuated fuel control for supercharged engines
US3435813A (en) * 1967-10-09 1969-04-01 Caterpillar Tractor Co Engine safety controls
US3494337A (en) * 1968-06-24 1970-02-10 Borg Warner Intake manifold pressure responsive fuel injection system
US3670710A (en) * 1970-05-21 1972-06-20 Honda Motor Co Ltd Apparatus and methods for controlling the amount of fuel injected into an internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562656A (en) * 1946-03-26 1951-07-31 Max L Blakeslee Fuel system for internal-combustion engines
US2569664A (en) * 1947-11-05 1951-10-02 American Bosch Corp Combined mechanical and pneumatic governor
US3077873A (en) * 1961-08-04 1963-02-19 Caterpillar Tractor Co Pressure actuated fuel control for supercharged engines
US3435813A (en) * 1967-10-09 1969-04-01 Caterpillar Tractor Co Engine safety controls
US3494337A (en) * 1968-06-24 1970-02-10 Borg Warner Intake manifold pressure responsive fuel injection system
US3670710A (en) * 1970-05-21 1972-06-20 Honda Motor Co Ltd Apparatus and methods for controlling the amount of fuel injected into an internal combustion engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090487A (en) * 1975-10-07 1978-05-23 Robert Bosch Gmbh Fuel injection system
US4165348A (en) * 1976-08-26 1979-08-21 Chiyoda Chemical Engineering And Construction Company Ltd. Apparatus for fuel supply to spark ignition type internal combustion engine
US4534329A (en) * 1982-11-11 1985-08-13 Fiat Auto S.P.A. Supply system for super charged diesel engines
US20030111062A1 (en) * 2001-12-13 2003-06-19 Brandenburg Billy J. Pressure actuated fuel vent closure and fuel shutoff apparatus
US7069915B2 (en) * 2001-12-13 2006-07-04 Briggs & Stratton Corporation Pressure actuated fuel vent closure and fuel shutoff apparatus

Also Published As

Publication number Publication date
JPS5014688B1 (enrdf_load_stackoverflow) 1975-05-29
CA945853A (en) 1974-04-23
AU463571B2 (en) 1975-07-31
AU3678971A (en) 1973-06-14

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