US3866584A - Switching device and circuit - Google Patents

Switching device and circuit Download PDF

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US3866584A
US3866584A US309556A US30955672A US3866584A US 3866584 A US3866584 A US 3866584A US 309556 A US309556 A US 309556A US 30955672 A US30955672 A US 30955672A US 3866584 A US3866584 A US 3866584A
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fuel
engine
rpm
supply
controlling
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US309556A
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Erhard Bigalke
Dieter Pundt
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Volkswagen AG
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Volkswagen AG
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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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/19—Degassers

Definitions

  • ABSTRACT In an electronic fuel control support for supplying fuel to a combustion engine, fuel supply is cut off when the engine r.p.m. during deceleration reaches a predetermined value and is re-supplied to the engine when the engine r.p.m. exceeds a second pre-determined value which exceeds the first pre-determined value.
  • the control circuitry includes an integration network which integrates a signal related to the rpm. of the engine for re-establishing the fuel supply.
  • the invention relates to circuitry for controlling the deceleration fuel cut-off in combustion engines, preferably for engines with electronic fuel injection and more particularly, to circuitry dependent on the rpm. in such a way that during deceleration fuel delivery above and below different predetermined engine speeds is prevented.
  • a deceleration fuel cut-off above a certain engine rpm. is provided in order to prevent, at least in the range above that r.p.m. during coasting, relatively high portions of harmful gases in the exhaust.
  • the portion of harmful gas on the one hand, is inconsequential while, on the other hand, the fuel cut-off may have a very adverse effect on the operation of the motor.
  • a slight acceleration of the engine may lead to a stalling of the motor and to backfiring thereof.
  • an object of the invention to provide an improvement of the known switching circuitry for deceleration fuel out-off wherein the fuel control circuit permits the feeding of fuel above a certain predetermined r.p.m. of the motor which is higher than a first predetermined r.p.m. at which fuel cut-off was initi ated.
  • the switching circuit according to the invention therefore, as in the case of the known fuel injection circuit, produces a deceleration fuel cut-off as soon as the rpm. exceeds a first predetermined value.
  • the fuel cut-off is removed again whenever the rpm. exceeds a second predetermined value which is greater than the first mentioned r.p.m.
  • This second r.p.m. value lies outside the area which is critical in regard to the portion of harmful gases in the exhaust gas, but is low enough so that the method of operation of the engine will not yet be influenced detrimentally by the fuel cutoff.
  • a significant feature of the inventive switching system is the use of an integration circuit which includes a capacitor, a discharge resistor lying in parallel thereto, as well as a charging resistor which is fed a signal dependent on the rpm. whereby a control electrode of a fuel supply transistor is regulated to achieve the desired results.
  • the transistor 1 controls the fuel cut-off during deceleration or releases the supply of fuel by means of load elements, not shown, respectively in accordance with its non-conductance or conductance, and consti tutes an essential component of the electronic fuel injection circuit.
  • the transistor 1 is nonconductive and, consequently, the deceleration fuel cut-off is effective whenever, with throttle valve 2 closed, its base potential is lowered. This is accomplished by means of diodes 3 and 4, which are connected with rpm. controlling network 5 in such a way that diodes 3 and 4 are made conductive at respective r.p.m. values which define a desired r.p.m. range for fuel cut-off.
  • transistor 1 is made conductive by means of resistors 6 and 7 or, insofar as no negative potential is connected to diodes 3 and 4, by the regenerative coupling network 8.
  • the control of transistor 1 by regenerative coupling network 8 and resistors 6 and 7 is well known to those skilled in electronic controlled fuel injection systems and forms no part of the present invention.
  • R.P.M. controlling network 5 generates control signals to actuate diodes 3 and 4 at respectively different engine r.p.m. values to define the desired rpm. range during which deceleration fuel cut-off takes place.
  • diode 3 may be forward biassed by r.p.m. controlling network 5 between 1. 800 and 3000 rpm. when the rpm. go up and between 3000 and i000 r.p.m. when the engine speed decreases. This is established in the network 5 by differentiating and integrating circuits for the fuel injection control impulses in a manner known in the art.
  • Diode 4 is connected to an element which is sensitive for the temperature of the engine in order to vary said r.p.m. ranges with temperature.
  • the closing of switch 2 provides a bias to the base of transistor 1 which is determined by resistors 6 and 7.
  • the base of transistor 1 is driven sufficiently negative to render it non-conductive cutting off supply of fuel to the engine.
  • the potential at junction A is the controlling factor as diode 12 can be back-biassed if the potential at junction A is sufficiently positive.
  • the potential at junction A is controlled by an integration circuit so that diode 12 is b ack-biassed at an elevated r.p.m. whereby transistor 1 is no longer controlled by diodes 3 and 4 and is again rendered conductive by the bias provided via switch 2 and resistors 6 and 7. In such a case the conduction of transistor 1 reestablishes supply of fuel to the engine.
  • the integration circuit comprises capacitor 9 and resistor 11 which is connected to a source that generates a signal dependent on the engine r.p.m. Resistor l acts as a discharge resistance for capacitor 9. The signal fed to resistor 11 and capacitor 9 are selected so that diode 12 is back biassed at a desired engine r.p.m. such as, for example, 3000 r.p.m.
  • the supply of fuel is restored at 3000 r.p.m. after having been cut-off at engine r.p.ms exceeding 1800 r.p.m. and is also restored when the engine speed again goes down below 1000 r.p.m. by the operation of r.p.m. controlling network and diodes 3 and 4.
  • An electronic fuel control circuit for controlling the supply of fuel to a combustion engine comprising:
  • throttle switch means for controlling the fuel supply
  • means for deceleration fuel cut-off additionally controlling the fuel supply in accordance with the rpm of the engine whereby the fuel supply is cut off at a predetermined rpm of said engine with said throttle switch means closed;
  • An electronic fuel injection control circuit as in claim 1 wherein said additional means for controlling comprises an integration network including a capacitor and a parallelly connected discharge resistor and a charging resistor connected to said capacitor and discharge resistor and fed responsive to the r.p.m. of said engine.
  • An electronic fuel injection control circuit as in claim 2 further comprising for use in controlling the supply of fuel a transistor for blocking and unblocking the supply of fuel.

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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)

Abstract

In an electronic fuel control support for supplying fuel to a combustion engine, fuel supply is cut off when the engine r.p.m. during deceleration reaches a predetermined value and is resupplied to the engine when the engine r.p.m. exceeds a second pre-determined value which exceeds the first pre-determined value. The control circuitry includes an integration network which integrates a signal related to the r.p.m. of the engine for re-establishing the fuel supply.

Description

limited States Patent Bigallte et a1.
1 1 Feb. 18, 1975 SWITCHING DEVICE AND CIRCUIT Inventors: Erhard Bigalke, Wolfsburg; Dieter Pundt, Morse, both of Germany Volkswagenwerk Akt., Wolfsburg, Germany Filed: Nov. 24, 1972 Appl. No.: 309,556
Related 1.1.8. Application Data Continuation-impart of Ser. No. 86,539, Nov. 3. 1970, abandoned.
Assignee:
US. Cl. 123/97 B, 123/32 EA lnt. Cl. F02b 3/00, FOZd 31/00 Field of Search 123/32 EA, 97 B References Cited UNITED STATES PATENTS 3/1969 Glockler 123/32 EA 8/1969 Reichardt 123/32 EA 3,503,594 3/1971) Golo ..l23/97B 3,533,386 10/1970 Masaki 3,630,180 12/1971 Bouteleux 123/978 Primary liramitzer-C J. Husar Assistant I:I\' tminerL. J. Casaregola Attorney, Agent, or Firm-Watson, Cole, Grindle & Watson [57] ABSTRACT In an electronic fuel control support for supplying fuel to a combustion engine, fuel supply is cut off when the engine r.p.m. during deceleration reaches a predetermined value and is re-supplied to the engine when the engine r.p.m. exceeds a second pre-determined value which exceeds the first pre-determined value. The control circuitry includes an integration network which integrates a signal related to the rpm. of the engine for re-establishing the fuel supply.
3 Claims, 1 Drawing Figure PATENTEDFEB] 81915 f 3,866,584
INVENTOR EHIarcZ 1 5M223 BY Diets/- Pun t I SWITCHING DEVICE AND CIRCUIT This application is a Continuation-in-Part of Bigalke et al application Ser. No. 86,539, filed Nov. 3, 1970 and now abandoned.
The invention relates to circuitry for controlling the deceleration fuel cut-off in combustion engines, preferably for engines with electronic fuel injection and more particularly, to circuitry dependent on the rpm. in such a way that during deceleration fuel delivery above and below different predetermined engine speeds is prevented.
In modern electronic fuel injection systems, a deceleration fuel cut-off above a certain engine rpm. is provided in order to prevent, at least in the range above that r.p.m. during coasting, relatively high portions of harmful gases in the exhaust. However, for a certain r.p.m. range lying above the rpm. fuel cut-off value the portion of harmful gas, on the one hand, is inconsequential while, on the other hand, the fuel cut-off may have a very adverse effect on the operation of the motor. For example, where the fuel is cut-off above a certain rpm. range, a slight acceleration of the engine may lead to a stalling of the motor and to backfiring thereof. Especially, in the case of critical passing maneuvers, this can considerably impede driving safety. A further disadvantage of the fuel cut-off even in the case of high r.p.m. resides in the fact that in the case of prolonged down-hill travel, the cylinder head will cool off considerably and thereby a resistance with negative temperature coefficient built into the cylinder head as an essential component of the circuit for the electronic fuel injection will assume such values, that in a subsequent idling of the engine, the injection time will be considerably prolonged, that is to say the rpm. of the motor drops, possibly resulting in engine cut-off.
It is, therefore, an object of the invention to provide an improvement of the known switching circuitry for deceleration fuel out-off wherein the fuel control circuit permits the feeding of fuel above a certain predetermined r.p.m. of the motor which is higher than a first predetermined r.p.m. at which fuel cut-off was initi ated.
The switching circuit according to the invention, therefore, as in the case of the known fuel injection circuit, produces a deceleration fuel cut-off as soon as the rpm. exceeds a first predetermined value. However, in contradistinction to the known circuit arrangements, the fuel cut-off is removed again whenever the rpm. exceeds a second predetermined value which is greater than the first mentioned r.p.m. This second r.p.m. value lies outside the area which is critical in regard to the portion of harmful gases in the exhaust gas, but is low enough so that the method of operation of the engine will not yet be influenced detrimentally by the fuel cutoff.
A significant feature of the inventive switching system is the use of an integration circuit which includes a capacitor, a discharge resistor lying in parallel thereto, as well as a charging resistor which is fed a signal dependent on the rpm. whereby a control electrode of a fuel supply transistor is regulated to achieve the desired results.
While the operation of the switching circuit of the present invention provides for a different type of operation than previously utilized in the operation of fuel injection engines, in constructing the switching circuit for carrying out such operations, standard circuits which are readily available in the existing technology would be utilized for such construction. In this regard, attention is directed towards the U5. Patent to W. Reichardt et al, Pat. No. 3,463,130, which illustrates various circuit arrangements capable of being utilized in the construction of the switching circuit of the present invention for carrying out the desired operation. With respect to this reference, it is noted that while the moments at which the fuel is cut off during deceleration of the engine is different from that provided in accordance with the present invention, the circuit arrangement for carrying out such control procedures would be substantially similar.
The above and other objects and advantages of the invention will be apparent from the following description when considered in connection with the accompanying drawing in which an exemplary embodiment is illustrated.
The transistor 1 controls the fuel cut-off during deceleration or releases the supply of fuel by means of load elements, not shown, respectively in accordance with its non-conductance or conductance, and consti tutes an essential component of the electronic fuel injection circuit. The transistor 1 is nonconductive and, consequently, the deceleration fuel cut-off is effective whenever, with throttle valve 2 closed, its base potential is lowered. This is accomplished by means of diodes 3 and 4, which are connected with rpm. controlling network 5 in such a way that diodes 3 and 4 are made conductive at respective r.p.m. values which define a desired r.p.m. range for fuel cut-off. If, however, throttle valve switch 2 is opened, then transistor 1 is made conductive by means of resistors 6 and 7 or, insofar as no negative potential is connected to diodes 3 and 4, by the regenerative coupling network 8. The control of transistor 1 by regenerative coupling network 8 and resistors 6 and 7 is well known to those skilled in electronic controlled fuel injection systems and forms no part of the present invention.
R.P.M. controlling network 5 generates control signals to actuate diodes 3 and 4 at respectively different engine r.p.m. values to define the desired rpm. range during which deceleration fuel cut-off takes place. For example, diode 3 may be forward biassed by r.p.m. controlling network 5 between 1. 800 and 3000 rpm. when the rpm. go up and between 3000 and i000 r.p.m. when the engine speed decreases. This is established in the network 5 by differentiating and integrating circuits for the fuel injection control impulses in a manner known in the art. Diode 4 is connected to an element which is sensitive for the temperature of the engine in order to vary said r.p.m. ranges with temperature. This, of course, does not constitute part of the invention. As is evident from the circuit illustrated in the FIGURE, the closing of switch 2 provides a bias to the base of transistor 1 which is determined by resistors 6 and 7. When either diode 3 or 4 is energized, the base of transistor 1 is driven sufficiently negative to render it non-conductive cutting off supply of fuel to the engine.
As is apparent from a consideration of the circuit, the potential at junction A is the controlling factor as diode 12 can be back-biassed if the potential at junction A is sufficiently positive. In accordance with the invention the potential at junction A is controlled by an integration circuit so that diode 12 is b ack-biassed at an elevated r.p.m. whereby transistor 1 is no longer controlled by diodes 3 and 4 and is again rendered conductive by the bias provided via switch 2 and resistors 6 and 7. In such a case the conduction of transistor 1 reestablishes supply of fuel to the engine. The integration circuit comprises capacitor 9 and resistor 11 which is connected to a source that generates a signal dependent on the engine r.p.m. Resistor l acts as a discharge resistance for capacitor 9. The signal fed to resistor 11 and capacitor 9 are selected so that diode 12 is back biassed at a desired engine r.p.m. such as, for example, 3000 r.p.m.
Thus, the supply of fuel is restored at 3000 r.p.m. after having been cut-off at engine r.p.ms exceeding 1800 r.p.m. and is also restored when the engine speed again goes down below 1000 r.p.m. by the operation of r.p.m. controlling network and diodes 3 and 4.
What is claimed is:
1. An electronic fuel control circuit for controlling the supply of fuel to a combustion engine, comprising:
throttle switch means for controlling the fuel supply;
means for deceleration fuel cut-off additionally controlling the fuel supply in accordance with the rpm of the engine whereby the fuel supply is cut off at a predetermined rpm of said engine with said throttle switch means closed; and
additional means for further controlling the fuel supply in response to the rpm of said engine whereby fuel is supplied to said engine when the engine rpm exceeds a second predetermined value greater than said predetermined rpm.
2. An electronic fuel injection control circuit as in claim 1 wherein said additional means for controlling comprises an integration network including a capacitor and a parallelly connected discharge resistor and a charging resistor connected to said capacitor and discharge resistor and fed responsive to the r.p.m. of said engine.
3. An electronic fuel injection control circuit as in claim 2 further comprising for use in controlling the supply of fuel a transistor for blocking and unblocking the supply of fuel.

Claims (3)

1. An electronic fuel control circuit for controlling the supply of fuel to a combustion engine, comprising: throttle switch means for controlling the fuel supply; means for deceleration fuel cut-off additionally controlling the fuel supply in accordance with the rpm of the engine whereby the fuel supply is cut off at a predetermined rpm of said engine with said throttle switch means closed; and additional means for further controlling the fuel supply in response to the rpm of said engine whereby fuel is supplied to said engine when the engine rpm exceeds a second predetermined value greater than said predetermined rpm.
2. An electronic fuel injection control circuit as in claim 1 wherein said additional means for controlling comprises an integration network including a capacitor and a parallelly connected discharge resistor and a charging resistor connected to said capacitor and discharge resistor and fed responsive to the r.p.m. of said engine.
3. An electronic fuel injection control circuit as in claim 2 further comprising for use in controlling the supply of fuel a transistor for blocking and unblocking the supply of fuel.
US309556A 1970-11-03 1972-11-24 Switching device and circuit Expired - Lifetime US3866584A (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064844A (en) * 1975-09-17 1977-12-27 Nissan Motor Co., Ltd. Apparatus and method for successively inactivating the cylinders of an electronically fuel-injected internal combustion engine in response to sensed engine load
US4075988A (en) * 1976-07-22 1978-02-28 Toyota Jidosha Kogyo Kabushiki Kaisha Apparatus for controlling supply of fuel to internal combustion engine
US4080947A (en) * 1975-12-08 1978-03-28 Nissan Motor Company, Limited Apparatus and method for controlling ignition of multi-cylinder internal combustion engines with a passageway that bypasses throttle valve
FR2414629A1 (en) * 1978-01-17 1979-08-10 Bosch Gmbh Robert METHOD AND DEVICE FOR CONTROLLING THE FUEL SUPPLY OF AN INTERNAL COMBUSTION ENGINE
US4173953A (en) * 1977-02-02 1979-11-13 Robert Bosch Gmbh Fuel injection pulse suppressor apparatus
US4174682A (en) * 1976-11-09 1979-11-20 Robert Bosch Gmbh Auxiliary fuel injection control circuit
US4214307A (en) * 1978-06-22 1980-07-22 The Bendix Corporation Deceleration lean out feature for electronic fuel management systems
US4284051A (en) * 1978-09-15 1981-08-18 Robert Bosch Gmbh Switching control apparatus for electromagnetic control units
EP0036396A2 (en) * 1980-03-17 1981-09-23 FIAT AUTO S.p.A. Device for controlling the fuel feed for Otto-cycle internal combustion engines for motor vehicles
US4434110A (en) 1981-03-23 1984-02-28 Fuel Systems Management Carburetor, control apparatus and method for internal combustion engines
US4510899A (en) * 1979-09-17 1985-04-16 Muncie Power Product Inc. Electronic overspeed switch
FR2556415A1 (en) * 1983-12-07 1985-06-14 Renault IGNITION ADVANCE COMPUTER WITH FUEL SUPPLY BREAKING FUNCTION FOR MOTOR VEHICLE
US4580465A (en) * 1984-02-24 1986-04-08 Aisin Seiki Kabushiki Kaisha Microprocessor controlled system and method for reducing the fuel flow to the prime mover of a power delivery system having a continuously variable ratio transmission upon a commanded decrease in power delivery
USRE32955E (en) * 1979-09-17 1989-06-20 Muncie Power Products, Inc. Electronic overspeed switch
US4977876A (en) * 1988-03-08 1990-12-18 Nissan Motor Company, Ltd. Fuel injection control system for internal combustion engine with fuel cut-off control at high engine speed range suppressive of recovery shock upon fuels resumption
US6474297B1 (en) * 2001-05-31 2002-11-05 Lai Ming De Fuel breaking/saving device for cars during coasting
US20110098907A1 (en) * 2008-06-23 2011-04-28 Nissan Motor Co., Ltd. Engine control device
DE102011010068A1 (en) * 2011-02-01 2012-08-02 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Method for controlling combustion engine of motor car during coasting of combustion engine, involves selecting deceleration fuel cut off rotation speed to terminate thrust shutdown of engine based on currently expected dragging torque

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3463130A (en) * 1966-11-03 1969-08-26 Bosch Gmbh Robert Fuel injection control system
US3503594A (en) * 1967-08-28 1970-03-31 Toyota Motor Co Ltd Fuel system
US3533386A (en) * 1968-03-30 1970-10-13 Nissan Motor Apparatus for reducing hydrocarbon content of engine exhaust gases during deceleration of automobile
US3630180A (en) * 1969-06-02 1971-12-28 Rene Bouteleux Device for balanced homogenization of air and liquid fuel mixtures in internal combustion engines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3463130A (en) * 1966-11-03 1969-08-26 Bosch Gmbh Robert Fuel injection control system
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3503594A (en) * 1967-08-28 1970-03-31 Toyota Motor Co Ltd Fuel system
US3533386A (en) * 1968-03-30 1970-10-13 Nissan Motor Apparatus for reducing hydrocarbon content of engine exhaust gases during deceleration of automobile
US3630180A (en) * 1969-06-02 1971-12-28 Rene Bouteleux Device for balanced homogenization of air and liquid fuel mixtures in internal combustion engines

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064844A (en) * 1975-09-17 1977-12-27 Nissan Motor Co., Ltd. Apparatus and method for successively inactivating the cylinders of an electronically fuel-injected internal combustion engine in response to sensed engine load
US4080947A (en) * 1975-12-08 1978-03-28 Nissan Motor Company, Limited Apparatus and method for controlling ignition of multi-cylinder internal combustion engines with a passageway that bypasses throttle valve
US4075988A (en) * 1976-07-22 1978-02-28 Toyota Jidosha Kogyo Kabushiki Kaisha Apparatus for controlling supply of fuel to internal combustion engine
US4174682A (en) * 1976-11-09 1979-11-20 Robert Bosch Gmbh Auxiliary fuel injection control circuit
US4173953A (en) * 1977-02-02 1979-11-13 Robert Bosch Gmbh Fuel injection pulse suppressor apparatus
FR2414629A1 (en) * 1978-01-17 1979-08-10 Bosch Gmbh Robert METHOD AND DEVICE FOR CONTROLLING THE FUEL SUPPLY OF AN INTERNAL COMBUSTION ENGINE
US4214307A (en) * 1978-06-22 1980-07-22 The Bendix Corporation Deceleration lean out feature for electronic fuel management systems
US4284051A (en) * 1978-09-15 1981-08-18 Robert Bosch Gmbh Switching control apparatus for electromagnetic control units
USRE32955E (en) * 1979-09-17 1989-06-20 Muncie Power Products, Inc. Electronic overspeed switch
US4510899A (en) * 1979-09-17 1985-04-16 Muncie Power Product Inc. Electronic overspeed switch
EP0036396A3 (en) * 1980-03-17 1982-05-05 Fiat Auto S.P.A. Device for controlling the fuel feed for otto-cycle internal combustion engines for motor vehicles
EP0036396A2 (en) * 1980-03-17 1981-09-23 FIAT AUTO S.p.A. Device for controlling the fuel feed for Otto-cycle internal combustion engines for motor vehicles
US4434110A (en) 1981-03-23 1984-02-28 Fuel Systems Management Carburetor, control apparatus and method for internal combustion engines
FR2556415A1 (en) * 1983-12-07 1985-06-14 Renault IGNITION ADVANCE COMPUTER WITH FUEL SUPPLY BREAKING FUNCTION FOR MOTOR VEHICLE
EP0155425A1 (en) * 1983-12-07 1985-09-25 Regie Nationale Des Usines Renault Fuel cut-off and resetting device in the deceleration phases of an internal-combustion engine
US4580465A (en) * 1984-02-24 1986-04-08 Aisin Seiki Kabushiki Kaisha Microprocessor controlled system and method for reducing the fuel flow to the prime mover of a power delivery system having a continuously variable ratio transmission upon a commanded decrease in power delivery
US4977876A (en) * 1988-03-08 1990-12-18 Nissan Motor Company, Ltd. Fuel injection control system for internal combustion engine with fuel cut-off control at high engine speed range suppressive of recovery shock upon fuels resumption
US6474297B1 (en) * 2001-05-31 2002-11-05 Lai Ming De Fuel breaking/saving device for cars during coasting
US20110098907A1 (en) * 2008-06-23 2011-04-28 Nissan Motor Co., Ltd. Engine control device
US8851049B2 (en) * 2008-06-23 2014-10-07 Nissan Motor Co., Ltd. Engine control device
DE102011010068A1 (en) * 2011-02-01 2012-08-02 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Method for controlling combustion engine of motor car during coasting of combustion engine, involves selecting deceleration fuel cut off rotation speed to terminate thrust shutdown of engine based on currently expected dragging torque

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