US3889647A - Speed governor for an engine having an electronic fuel injection system - Google Patents

Speed governor for an engine having an electronic fuel injection system Download PDF

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Publication number
US3889647A
US3889647A US375580A US37558073A US3889647A US 3889647 A US3889647 A US 3889647A US 375580 A US375580 A US 375580A US 37558073 A US37558073 A US 37558073A US 3889647 A US3889647 A US 3889647A
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United States
Prior art keywords
engine
fuel
signal
responsive
set point
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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
Application number
US375580A
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English (en)
Inventor
Todd L Rachel
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.)
Siemens Bendix Automotive Electronics Ltd
Bendix Engine Components Ltd
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Bendix Corp
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Application filed by Bendix Corp filed Critical Bendix Corp
Priority to US375580A priority Critical patent/US3889647A/en
Priority to DE2428300A priority patent/DE2428300C3/de
Priority to GB2856874A priority patent/GB1454330A/en
Priority to FR7422960A priority patent/FR2236091B1/fr
Priority to JP49075062A priority patent/JPS5069431A/ja
Application granted granted Critical
Publication of US3889647A publication Critical patent/US3889647A/en
Assigned to BENDIX ENGINE COMPONENTS LIMITED reassignment BENDIX ENGINE COMPONENTS LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE 10-01-85 Assignors: CANADIAN FRAM LIMITED
Assigned to SIEMENS-BENDIX AUTOMOTIVE ELECTRONICS LIMITED reassignment SIEMENS-BENDIX AUTOMOTIVE ELECTRONICS LIMITED MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: OCT. 1, 1988 Assignors: 67393 ONTARIO LIMITED, BENDIX ELECTRONICS LIMITED, SBAE CANADA HOLDINGS LIMITED
Assigned to BENDIX ELECTRONICS LIMITED reassignment BENDIX ELECTRONICS LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: 06/02/86 Assignors: BENDIX ENGINE COMPONENTS LIMITED
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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/0205—Circuit arrangements for generating control signals using an auxiliary engine speed control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/006—Electric control of rotation speed controlling air supply for maximum speed control

Definitions

  • This invention relates generally to the field of electronic fuel injection (EFI) systems and particularly to EFI systems for automotive type internal combustion engines. More particularly, an improved engine speed governor is provided which uses EFI system fuel pressure to govern engine speed to a predetermined set point.
  • EFI electronic fuel injection
  • This invention contemplates an engine speed governor for use with an electronic fuel injection system wherein, in one embodiment of the invention, engine speed is sensed and converted to a dc. signal.
  • a comparator compares the dc signal to a dc. signal corresponding to a predetermined speed set point and develops an error signal which is amplified and operates a proportional solenoid for regulating fuel flow to an engine throttle actuator in order to close the throttle plates when engine speed reaches the set point.
  • engine speed actuates a flip-flop in the electronic control unit (ECU) of the EFI system, which provides pulses at a frequency commensurate with engine speed.
  • ECU electronice control unit
  • This frequency is compared to a frequency corresponding to the predetermined speed set point and the error frequency actuates an intermittent fuel flow regulating valve for sufficient time in each engine cycle to power and hold the engine throttle to the desired position to maintain the set point speed.
  • the invention operates in open loop configuration.
  • the first mentioned embodiment provides analog or continuous control while the second embodiment provides digital or intermittent control.
  • FIG. 1 is a diagrammatic representation of an electronic fuel injection system for an internal combustion engine with which the engine speed governor of the present invention may be used.
  • FIG. 2 is a diagrammatic representation of an engine throttle mechanism associated with the engine speed governor of the invention.
  • FIG. 3 is a schematic representation of one embodiment of the engine speed governor according to the invention.
  • FIG. 4 is a schematic representation of another embodiment of the speed governor according to the invention.
  • FIG. 5 is a graphical representation showing pulse waveforms provided by the embodiment of the invention according to FIG. 4.
  • FIG. 1 an electronic fuel injection system is shown with which the present invention may be utilized.
  • the system is comprised of an electronic control unit 10 which receives signals from a timing pick-up 12, a temperature sensor 14 and various parameter sensors 16 associated with a throttle body 20.
  • Timing pick-up 12 provide signals indicative of engine speed. These signals may be derived from any source indicative of engine crank angle but are preferably from the engine ignition distributor. Parameter sensors 16 are attached to throttle body 20 which controls the flow of air into an engine 27. Throttle body 20 has a pair of air passages passing therethrough indicated as 22 and the effective cross-sectional area of passages 22 is controlled by throttle plates 24. Throttle plates 24 are mounted on a shaft 26 for controlled rotation there with. The angular position of shaft 26 and hence of throttle plates 24 is controlled by throttle control means comprised of a linkage 18 and a pedal 28 connected thereto through suitable connecting means 30.
  • Electronic control unit 10 is energized by a battery 32 which may be the vehicle battery and which also energizes those of the various sensors which require external energization.
  • the output of electronic control unit 10 controls the energization of an injector valve means 34 which is mounted in the intake manifold 36 of engine 27 and which is adapted to introduce an airfuel mixture for intake through intake valve 38, shown in open position, into the combustion cylinder 40 of the engine.
  • Pressurized fuel is provided to injector valve 34 from fuel tank 42 by means of a pump 44 and suitable fuel supply and return lines 46.
  • computing means 10 may control an injector valve means comprised of one or more injector valve members 34 arranged to be actuated singly or in groups of varying numbers in sequential fashion as well as simultaneously.
  • Throttle linkage 18 which may be of the type shown for purposes of illustration in FIG. 2, includes a housing member 60, lost motion link 62, resilient biasing means 64, position control means 66, and closing means 70.
  • Lost motion link 62 is fixedly attached to throttle plate shaft 26 to control rotation thereof.
  • Lost motion link 62 includes a travel slot 72 and position control means 66 includes a pin member 74 mounted for movement in travel slot 72.
  • Resilient means 64 is operative to urge pin member 74 to an extreme end of slot 72 while position control means 66 is operative to urge the pin towards the other extreme end of slot 72.
  • Closing means 70 is operative to urge the lost motion link and, hence, throttle plates 24, counterclockwise relative to the drawing of FIG. 2 to effect closing movement thereof upon release of tension in control means 66.
  • timing pick-up 12 provides alternating signals at a frequency corresponding to the speed of engine 27.
  • the signals are applied to a conventional frequency to d.c. converter 80 which provides a corresponding d.c. signal.
  • a d.c. signal source 82 which may be a battery, provides a d.c. signal corresponding to a predetermined desired set point speed.
  • the signals from d.c. signal source 82 and frequency to d.c. converter 80 are compared by a comparator amplifier 84 which provides an error signal V corresponding to the difference between the compared signals.
  • Signal V. from comparator 84 is applied to function generator 86 which provides a signal V related to signal V in accordance with the graphical illustration designated a in FIG. 3.
  • Signal V is amplified by an amplifier 88 and applied therefrom to a proportional solenoid 90.
  • Solenoid 90 actuates a flow modulator 92, which may be of the flexible diaphragm type, to regulate the pressurized fuel flow through supply and return lines 46A to a throttle actuator 45 which may be a conventional servo type device.
  • the fuel pressure provided by the regulated fuel flow is applied by actuator 45 as an actuating force to close throttle plates 24 (FIGS. 1 and 2) until the engine speed reaches the predetermined set point, thereby removing speed control from the driver of the vehicle as provided through foot pedal 28.
  • the signals from timing pick-up l2 actuate a flip-flop 100 in electronic control unit for providing a pulse V having a waveform as shown in FIG. 5.
  • Pulse V,- has a width T and has equally spaced transitions at a given engine speed.
  • Pulse V,- is applied to a conventional type frequency comparator 102 where the frequency thereof is compared with the frequency of a pulse V, from a pulse source 104 which may be a conventional type oscillator.
  • Pulse V,- has a waveform as shown in FIG. 5, with transitions corresponding to the desired set point speed.
  • Pulse V has a pulse width T and is synchronized with pulse V,- as shown in the figure.
  • the output of frequency comparator 102 is a pulse V having a width T which is the difference between pulse widths T, and T when T, is, for example, less than T as shown in the figure.
  • Pulse V is modulated by a pulse width modulator 106 and the modulator pulse is applied to an intermittent on-off valve 108 which regulates the pressurized fuel flow through supply and return lines 46A to throttle actuator 45 for a sufficient time in each engine cycle to power and hold throttle plates 24 (FIG. 1) to the desired position for maintaining the predetermined set point engine speed.
  • the speed may be governed in a continuous or analog fashion as described with reference to FIG. 3 or in an intermittent or digital fashion as described with reference to FIG. 4.
  • the invention has been described for use with an engine having an electronic fuel control system so as to utilize engine parameter sensors included therein, and specifically to use regulated fuel flow pressure as an actuating force to provide the speed governing characteristic. It will be understood, however, .that the speed governor described may be used with a conventional internal combustion engine as well.
  • the invention is especially cost effective when used with an EFI system since the necessary parameters are already sensed and provided in an electronic format, and the EFI system employs a pressurized fuel supply which may be used as a throttle actuating force as described. Alternatively, air pressure or oil pressure may be used as well.
  • a fuel control system of the type having sensor means including means for generating an ac. signal at a frequency corresponding to engine speed, responsive to engine conditions operative to provide signals indicative of engine generating parameters, means responsive to the sensor means signals operative to provide a fuel delivery command signal indicative of the engine fuel requirements, fuel supply means responsive to the fuel delivery command signal operative to supply the engine with pressurized fuel in relation to the fuel delivery command signal and means for controlling mixture of fuel and air to the engine, the improvement comprising:
  • a converter connected to the a.c. signal generating means for converting the engine speed signal therefrom to a d.c. signal
  • actuator means connected to the fuel regulating means and to the mixture control means and responsive to said force for actuating the mixture control means to control the mixture of air and fuel to the engine to maintain the predetermined set point speed.
  • regulating means including on-off flow valve means connected to the fluid supply and to the pulse width modulator and responsive to the modulated pulse for permitting pressurized fluid from the supply for a sufficient time to provide a force; and
  • actuator means connected to the regulating means and to the mixture control means and responsive to said force for actuating the mixture control means to control the mixture of air and fuel to the engine to maintain the predetermined set point speed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Controls For Constant Speed Travelling (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
US375580A 1973-07-02 1973-07-02 Speed governor for an engine having an electronic fuel injection system Expired - Lifetime US3889647A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US375580A US3889647A (en) 1973-07-02 1973-07-02 Speed governor for an engine having an electronic fuel injection system
DE2428300A DE2428300C3 (de) 1973-07-02 1974-06-12 Elektronischer Drehzahlregler für eine Brennkraftmaschine
GB2856874A GB1454330A (en) 1973-07-02 1974-06-27 Speed governor for an internal combustion engine
JP49075062A JPS5069431A (enrdf_load_stackoverflow) 1973-07-02 1974-07-02
FR7422960A FR2236091B1 (enrdf_load_stackoverflow) 1973-07-02 1974-07-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US375580A US3889647A (en) 1973-07-02 1973-07-02 Speed governor for an engine having an electronic fuel injection system

Publications (1)

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US3889647A true US3889647A (en) 1975-06-17

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US375580A Expired - Lifetime US3889647A (en) 1973-07-02 1973-07-02 Speed governor for an engine having an electronic fuel injection system

Country Status (5)

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US (1) US3889647A (enrdf_load_stackoverflow)
JP (1) JPS5069431A (enrdf_load_stackoverflow)
DE (1) DE2428300C3 (enrdf_load_stackoverflow)
FR (1) FR2236091B1 (enrdf_load_stackoverflow)
GB (1) GB1454330A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2701567A1 (de) * 1977-01-15 1978-07-20 Bosch Gmbh Robert Geschwindigkeitssteuereinrichtung fuer fahrzeuge
FR2379703A1 (fr) * 1977-02-02 1978-09-01 Bendix Corp Appareil de coupure d'injection de combustible et de protection contre les surtemperatures du systeme de traitement des gaz d'echappement d'un moteur a combustion interne
US4155419A (en) * 1976-09-16 1979-05-22 Vdo Adolf Schindling Ag Apparatus for controlling the traveling speed of a motor vehicle
US4181103A (en) * 1977-05-06 1980-01-01 Sturdy Truck Equipment, Inc. Governor for engine and load speeds
US4188921A (en) * 1977-08-06 1980-02-19 Robert Bosch Gmbh Method and apparatus for defining duration of fuel injection control pulses
US4203395A (en) * 1977-09-16 1980-05-20 The Bendix Corporation Closed-loop idle speed control system for fuel-injected engines using pulse width modulation
US4207845A (en) * 1976-02-12 1980-06-17 Franz Semmler Apparatus for controlling fuel supply to an engine
US4297978A (en) * 1979-01-18 1981-11-03 Nissan Motor Company, Limited Idling rotational speed control system for a diesel engine
US4359124A (en) * 1979-10-16 1982-11-16 Nippondenso Co., Ltd. Constant running speed control system for automobile
WO2004042214A1 (de) * 2002-11-02 2004-05-21 Deutsche Montan Technologie Gmbh Elektromechanischer antrieb zum steuern und regeln einer als durchflussmodulator fungierenden drosselklappe in einem rohr
US20070213920A1 (en) * 2003-11-18 2007-09-13 Hajime Igarashi Fuel-saving management system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS598655B2 (ja) * 1976-08-02 1984-02-25 株式会社小松製作所 燃料制御装置
DE2800433A1 (de) * 1978-01-05 1979-07-19 Bosch Gmbh Robert Einrichtung zur drehzahlbegrenzung einer brennkraftmaschine
DE3536835A1 (de) * 1985-10-16 1987-04-16 Iveco Magirus Vorrichtung zum regeln der kraftstoffzufuhr einer brennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099330A (en) * 1962-01-22 1963-07-30 Rheem Mfg Co Electrically operated speed control device
US3601103A (en) * 1969-10-13 1971-08-24 Ladell Ray Swiden Engine-condition-responsive cutoff apparatus
US3648798A (en) * 1970-06-02 1972-03-14 Zbigniew J Jania Speed control system for an automotive vehicle
US3651460A (en) * 1970-05-21 1972-03-21 Chandler Evans Inc Fixed rate integral controller
US3702603A (en) * 1969-11-21 1972-11-14 Brica Eng Ltd Internal combustion engines
US3745982A (en) * 1970-07-01 1973-07-17 Nippon Denso Co Fuel control means for an internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR892779A (fr) * 1942-03-26 1944-05-19 Bosch Gmbh Robert Installation d'injection pour les moteurs à allumage séparé et à grande gamme de vitesse, en particulier les moteurs de véhicules

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099330A (en) * 1962-01-22 1963-07-30 Rheem Mfg Co Electrically operated speed control device
US3601103A (en) * 1969-10-13 1971-08-24 Ladell Ray Swiden Engine-condition-responsive cutoff apparatus
US3702603A (en) * 1969-11-21 1972-11-14 Brica Eng Ltd Internal combustion engines
US3651460A (en) * 1970-05-21 1972-03-21 Chandler Evans Inc Fixed rate integral controller
US3648798A (en) * 1970-06-02 1972-03-14 Zbigniew J Jania Speed control system for an automotive vehicle
US3745982A (en) * 1970-07-01 1973-07-17 Nippon Denso Co Fuel control means for an internal combustion engine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207845A (en) * 1976-02-12 1980-06-17 Franz Semmler Apparatus for controlling fuel supply to an engine
US4155419A (en) * 1976-09-16 1979-05-22 Vdo Adolf Schindling Ag Apparatus for controlling the traveling speed of a motor vehicle
US4169437A (en) * 1977-01-15 1979-10-02 Robert Bosch Gmbh Speed control system for a vehicle
DE2701567A1 (de) * 1977-01-15 1978-07-20 Bosch Gmbh Robert Geschwindigkeitssteuereinrichtung fuer fahrzeuge
FR2379703A1 (fr) * 1977-02-02 1978-09-01 Bendix Corp Appareil de coupure d'injection de combustible et de protection contre les surtemperatures du systeme de traitement des gaz d'echappement d'un moteur a combustion interne
US4117807A (en) * 1977-02-02 1978-10-03 The Bendix Corporation Fuel injection cut off means for over temperature protection of exhaust treatment device
US4181103A (en) * 1977-05-06 1980-01-01 Sturdy Truck Equipment, Inc. Governor for engine and load speeds
US4188921A (en) * 1977-08-06 1980-02-19 Robert Bosch Gmbh Method and apparatus for defining duration of fuel injection control pulses
US4203395A (en) * 1977-09-16 1980-05-20 The Bendix Corporation Closed-loop idle speed control system for fuel-injected engines using pulse width modulation
US4297978A (en) * 1979-01-18 1981-11-03 Nissan Motor Company, Limited Idling rotational speed control system for a diesel engine
US4359124A (en) * 1979-10-16 1982-11-16 Nippondenso Co., Ltd. Constant running speed control system for automobile
WO2004042214A1 (de) * 2002-11-02 2004-05-21 Deutsche Montan Technologie Gmbh Elektromechanischer antrieb zum steuern und regeln einer als durchflussmodulator fungierenden drosselklappe in einem rohr
US20070213920A1 (en) * 2003-11-18 2007-09-13 Hajime Igarashi Fuel-saving management system
US8478481B2 (en) * 2003-11-18 2013-07-02 Hino Motors, Ltd. Fuel-saving management system

Also Published As

Publication number Publication date
DE2428300C3 (de) 1981-01-29
FR2236091A1 (enrdf_load_stackoverflow) 1975-01-31
GB1454330A (en) 1976-11-03
FR2236091B1 (enrdf_load_stackoverflow) 1979-07-27
DE2428300A1 (de) 1975-01-23
JPS5069431A (enrdf_load_stackoverflow) 1975-06-10
DE2428300B2 (de) 1980-03-20

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