US3911872A - Fuel supply systems for internal combustion engines - Google Patents
Fuel supply systems for internal combustion engines Download PDFInfo
- Publication number
- US3911872A US3911872A US356128A US35612873A US3911872A US 3911872 A US3911872 A US 3911872A US 356128 A US356128 A US 356128A US 35612873 A US35612873 A US 35612873A US 3911872 A US3911872 A US 3911872A
- Authority
- US
- United States
- Prior art keywords
- fuel
- spindle
- digital
- arm
- contacts
- 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
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Classifications
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/281—Interface circuits between sensors and control unit
- F02D2041/283—Interface circuits between sensors and control unit the sensor directly giving at least one digital reading
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
-
- 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
- Y10S261/74—Valve actuation; electrical
Definitions
- a fuel supply system in accordance with the invention includes a throttle valve for controlling the admission of combustion air to an engine and having an angularly movable spindle, a digital encoder for said throttle valve for producing a digital output corresponding to the angular position of the spindle, and a digital electronic fuel control unit responsive to the output of the digital encoder for controlling the rate at which fuel is supplied to the engine in accordance with the output of the digital encoder.
- the system shown in FIG. 1 includes a digital electronic fuel control device which controls the supply of fuel, pressurised by a pump 11, to injection nozzles 12 in an air intake manifold 13 of the engine.
- the digital control device 10 has inputs from a speed sensing device 14 and from a digital encoder 15 associated with a throttle 16 which controls admission of combustion air to the manifold 13 under the control of a pedal 17.
- the timing of the injections is controlled by a timing device 18.
- the quantity injected in each cycle is controlled by the device 10.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (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)
- Fuel-Injection Apparatus (AREA)
Abstract
A fuel supply system for an internal combustion engine comprises a pump feeding fuel to one or more injector nozzles. A digital electronic fuel control unit controls the flow of fuel to the nozzles in response to signals from a digital encoder whose output is dependent upon the angle of a vane controlling the admission of combustion air into the engine. The digital encoder includes an arm mounted on a spindle carrying the vane. The arm has a series of contacts thereon which move relative to fixed contact areas as the vane pivots with the spindle so that a digital output is obtained in accordance with the angle of the vane.
Description
United States Patent Hughes Oct. 14, 1975 FUEL SUPPLY SYSTEMS FOR INTERNAL 3,720,193 3/1973 Monpetit 123/32 EA COMBUSTION ENGINES 3,752,139 8/1973 Asplund 123/117 R 3,780,711 12/1973 Lindberg 123/32 EA [75] Inventor: Ronald W1lliam Hughes,
Birmingham, England OTHER PUBLICATIONS 73 Assignee; The Lucas Electrical Company Electronic Fuel Injection Reduces Automotive Pollu- Limited, Birmingham, England tion, M. Williams, Electronics, Sept. 11, 1972, pp.
121-125. [22] Filed: May 1, 1973 [21] Appl. No.2 356,128 Primary Examiner-Charles J. Myhre Assistant Examiner-Joseph Cangelosi Foreign Application Priority Data Attorney, Agent, or Firm-Holman & Stern May 13, 1972 United Kingdom 22781/72 [57] ABSTRACT [52] 123/32 EA; 123/32 AE; 123/117 R; A fuel supply system for an internal combustion en- 2 123/1 19 R; 123/139 E gine comprises a pump feeding fuel to one or more in- [51] Int. Cl. F021) 5/02 jector noZz]S A digital electronic fuel control unit [58] held of Search 123/32 32 139 controls the flow of fuel to the nozzles in response to 123/119 signals from a digital encoder whose output is dependent upon the angle of a vane controlling the admis- [56] References C'ted sion of combustion air into the engine. The digital en- UNITED STATES PATENTS coder includes an arm mounted on a spindle carrying 3,592,178 7/1971 Schiff 123/148 1-: the vane The arm has a Series Of Contacts thereon 3,593,692 7/1971 Scholl 123/32 EA which move relative to fixed contact areas as the vane 3,612,008 10/1971 Beishirw 123/32 EA pivots with the spindle so that a digital output is ob- 3,616,780 1 1 H8 6 123/32 EA tained in accordance with the angle of the vane. 3,669,081 6/1972 Mon Petit 1. 123/139 E 3,689,753 9/1972 Lucas 123/32 EA 6 Claims, 4 Drawing Figures 1 /l 1 9 DIGITAL DIGITAL FUEL CONTROLLER u THROTTLE 16 B/ AIR INTAKE MANIFOLD VALVE I PU P ENGINE I! I7 TI HER SPEED SENSOR A '8 US. Patent Oct.14,1975 Sheet 1 of2 3,911,872 I IO q' DIGITAL DIGITAL FUEL CONTROLLER |5 IZflL 2 k2 I2 U L] u u 13/ AIR INTAKE MANIFOLD SKEJE H H H ENGINE vg fi /ZQ DIGITAL DIGITAL CONTROL ENCODER AS 5 SPRAY NOZZLE TIIIRAOLTVTELE I6 I I II II I II UT ENGINE Z i SSPEED PUMP ZZ L F G I SP QE IE T OR I U.S. Patent Oct. 14, 1975 Sheet 2 of2 3,911,872
FUEL SUPPLY SYSTEMS FOR INTERNAL COMBUSTION ENGINES This invention relates to fuel supply systems for internal combustion engines.
A fuel supply system in accordance with the invention includes a throttle valve for controlling the admission of combustion air to an engine and having an angularly movable spindle, a digital encoder for said throttle valve for producing a digital output corresponding to the angular position of the spindle, and a digital electronic fuel control unit responsive to the output of the digital encoder for controlling the rate at which fuel is supplied to the engine in accordance with the output of the digital encoder.
In the accompanying drawings FIGS. 1 and 2 are diagrammatic representations of two examples of fuel supply systems in accordance with the invention, for an internal combustion engine, and
FIGS. 3 and 4 are mutually perpendicular sections through a throttle valve which can be employed in either system.
The system shown in FIG. 1 includes a digital electronic fuel control device which controls the supply of fuel, pressurised by a pump 11, to injection nozzles 12 in an air intake manifold 13 of the engine. The digital control device 10 has inputs from a speed sensing device 14 and from a digital encoder 15 associated with a throttle 16 which controls admission of combustion air to the manifold 13 under the control of a pedal 17. The timing of the injections is controlled by a timing device 18. The quantity injected in each cycle is controlled by the device 10.
In the system shown in FIG. 2, a single spray nozzle 19 is used which sprays fuel into air intake downstream of the throttle. In this case, digital control device 20 is used to drive a variable speed electric motor 21 which drives a pump 22 supplying the nozzle 19. The rate of injection is controlled by the device 20.
In each case, the throttle valve 16 has a spindle 23 which is turned to move a vane 24 within a passage through the throttle valve body. An electrically insulating arm 25 is mounted on the spindle 23 and a row of contacts 26 on this arm 25 engage a printed circuit board 27 mounted on the body. One of these contacts is permanently in contact with an arcuate conductive area 27a on this board. The remaining contacts 26 run over arcuate rows of alternately conductive and nonconductive areas on the board 27, the conductive areas of each arcuate row being connected together and thereby to an associated one of a plurality of terminals 27b on the board. Thus, for any position of the spindle a predetermined number of the terminals 27b are connected to the area 27a and the remainder are isolated from the area 27a. Preferably the conductive areas on the board are arranged to give a Gray, coded digital output, as is already known in shaft encoders, so that only one output changes at any time as the spindle is turned.
The encoder 15 provides a digital input into the digital control device 10 or 20, which, taken in combination with the signal from the speed sensing device 14 determines the output of the device 10 to control the rate of fuel input.
Details concerning the digital fuel control circuits l0 and 20, speed centers 14, and timing device 18 may be found, for example, in US. Pat. No. 3,689,753, issued Sept. 5, 1972, to Williams et al and assigned to the same assignee as the present application, said patent being expressly incorporated herein by reference.
I claim:
1. A fuel supply system including a throttle valve for controlling the admissions of combustion air to an engine and having an angularly movable spindle, a digital encoder for said throttle valve for producing a digital output signal corresponding to the angular position of the spindle, and a digital electronic fuel control unit responsive to said output signal of the digital encoder for controlling the rate at which fuel is supplied to an engine in accordance with said output signal of the digital encoder, said encoder including an arm mounted for angular movement with the spindle, a plurality of contacts mounted on said arm, the number of said contacts corresponding to the number of bits of said digital output signal, and a plurality of fixed digitally coded contact paths equal in number to and arranged in a one-to-one contacting relationship with said contacts on said arm and relative to which the contacts on the arm are movable upon angular movement of the spindle so as to generate a plurality of different digitally coded output signals.
2. A fuel supply system as claimed in claim 1, including at least one fuel injector nozzle for supplying fuel to the engine, and wherein the fuel control unit is arranged to control the flow of fuel to the said at least one nozzle.
3. A fuel supply system as claimed in claim 2, wherein a pump is arranged to supply fuel to the control unit which controls flow of fuel therefrom to the said at least one nozzle.
4. A fuel supply system as claimed in claim 2, wherein a pump is provided for supplying fuel, and a variable speed motor controlled by the fuel control unit drives the pump.
5. A fuel supply system as claimed in claim 1, wherein one of the contacts on the arm is permanently in contact with an arcuate conductive area and other contacts on the arm are movable over arcuate rows of alternately conductive and non-conductive areas, the conductive areas of each arcuate row being connected to a terminal so that for any position of the spindle a predetermined number of the terminals are connected to the said arcuate conductive area and the remainder are isolated from the said arcuate conductive area.
6. A fuel supply system as claimed in claim 5, wherein the conductive areas are arranged so that only one output changes at any time as the spindle is turned. i
Claims (6)
1. A fuel supply system including a throttle valve for controlling the admissions of combustion air to an engine and having an angularly movable spindle, a digital encoder for said throttle valve for producing a digital output signal corresponding to the angular position of the spindle, and a digital electronic fuel control unit responsive to said output signal of the digital encoder for controlling the rate at which fuel is supplied to an engine in accordance with said output signal of the digital encoder, said encoder including an arm mounted for angular movement with the spindle, a plurality of contacts mounted on said arm, the number of said contacts corresponding to the number of bits of said digital output signal, and a plurality of fixed digitally coded contact paths equal in number to and arranged in a one-to-one contacting relationship with said contacts on said arm and relative to which the contacts on the arm are movable upon angular movement of the spindle so as to generate a plurality of different digitally coded output signals.
2. A fuel supply system as claimed in claim 1, including at least one fuel injector nozzle for supplying fuel to the engine, and wherein the fuel control unit is arranged to control the flow of fuel to the said at least one nozzle.
3. A fuel supply system as claimed in claim 2, wherein a pump is arranged to supply fuel to the control unit which controls flow of fuel therefrom to the said at least one nozzle.
4. A fuel supply system as claimed in claim 2, wherein a pump is provided for supplying fuel, and a variable speed motor controlled by the fuel control unit drives the pump.
5. A fuel supply system as claimed in claim 1, wherein one of the contacts on the arm is permanently in contact with an arcuate conductive area and other contacts on the arm are movable over arcuate rows of alternately conductive and non-conductive areas, the conductive areas of each arcuate row being connected to a terminal so that for any position of the spindle a predetermined number of the terminals are connected to the said arcuate conductive area and the remainder are isolated from the said arcuate conductive area.
6. A fuel supply system as claimed in claim 5, wherein the conductive areas are arranged so that only one output changes at any time as the spindle is turned.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2278172A GB1435098A (en) | 1972-05-13 | 1972-05-13 | Fuel supply systems for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
US3911872A true US3911872A (en) | 1975-10-14 |
Family
ID=10184990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US356128A Expired - Lifetime US3911872A (en) | 1972-05-13 | 1973-05-01 | Fuel supply systems for internal combustion engines |
Country Status (7)
Country | Link |
---|---|
US (1) | US3911872A (en) |
JP (1) | JPS5647372B2 (en) |
AU (1) | AU470436B2 (en) |
DE (1) | DE2324115C2 (en) |
FR (1) | FR2184745B1 (en) |
GB (1) | GB1435098A (en) |
IT (1) | IT985021B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3983851A (en) * | 1974-03-18 | 1976-10-05 | Hitachi, Ltd. | Electronic fuel injection apparatus |
US4098252A (en) * | 1976-03-23 | 1978-07-04 | Daimler-Benz Aktiengesellschaft | Method and apparatus for carrying out the method to control a multi-cylinder internal combustion engine |
US4116177A (en) * | 1977-01-21 | 1978-09-26 | Whatley Jr Norman | Pre-volatilizing electronically controlled carburetor |
US4143622A (en) * | 1975-11-18 | 1979-03-13 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
US4144847A (en) * | 1975-12-27 | 1979-03-20 | Nissan Motor Company, Limited | Emission control apparatus for internal engines with means for generating step function voltage compensating signals |
US4172433A (en) * | 1974-12-05 | 1979-10-30 | Robert Bosch Gmbh | Process and apparatus for fuel-mixture preparation |
US4356803A (en) * | 1980-03-07 | 1982-11-02 | Toyota Jidosha Kogyo Kabushiki Kaisha | Method and apparatus for controlling the fuel feeding rate of an internal combustion engine |
US4450815A (en) * | 1981-05-06 | 1984-05-29 | Hitachi, Ltd. | Internal combustion engine control apparatus |
US4452202A (en) * | 1981-12-24 | 1984-06-05 | Acf Industries, Inc. | Vacuum pressure transducer |
US5415144A (en) * | 1994-01-14 | 1995-05-16 | Robertshaw Controls Company | Throttle position validation method and apparatus |
WO2003023802A1 (en) * | 2001-09-11 | 2003-03-20 | Marquardt Gmbh | Electric switch |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5819844B2 (en) * | 1978-07-13 | 1983-04-20 | 三菱自動車工業株式会社 | Engine fuel supply system |
JPS586050B2 (en) * | 1978-07-13 | 1983-02-02 | 三菱自動車工業株式会社 | Engine fuel supply system |
JPS6390646A (en) * | 1986-10-03 | 1988-04-21 | Japan Electronic Control Syst Co Ltd | Throttle valve opening detector |
DE3705969A1 (en) * | 1987-02-25 | 1988-09-08 | Pierburg Gmbh | ROTARY OR SLIDE SWITCH |
GB2223898B (en) * | 1988-09-20 | 1992-11-18 | C & K Switches Limited | Position switches |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3592178A (en) * | 1969-10-15 | 1971-07-13 | Peter Schiff | Electronic ignition timing circuit |
US3593692A (en) * | 1968-05-11 | 1971-07-20 | Bosch Gmbh Robert | Electrical fuel injection arrangement for internal combustion engines |
US3612008A (en) * | 1970-02-16 | 1971-10-12 | Acf Ind Inc | Vacuum-responsive voltage generator for a fuel injection system |
US3616780A (en) * | 1968-09-28 | 1971-11-02 | Bosch Gmbh Robert | Electrically controlled fuel injection arrangement for internal combustion engines |
US3669081A (en) * | 1969-05-23 | 1972-06-13 | Sopromi Soc Proc Modern Inject | Electronically controlled injecting arrangements feeding fuel under constant pressure into internal combustion engines |
US3689753A (en) * | 1969-09-23 | 1972-09-05 | Lucas Industries Ltd | Engine control systems |
US3720193A (en) * | 1967-11-27 | 1973-03-13 | Sopromi Soc Proc Modern Inject | Method and apparatus for coding and reading data governing the duration of energization of fuel injection in an internal combustion engine |
US3752139A (en) * | 1971-11-23 | 1973-08-14 | Gte Sylvania Inc | Electronic ignition timing system for internal combustion engines |
US3780711A (en) * | 1971-12-16 | 1973-12-25 | Acf Ind Inc | Electronic fuel injection system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1311479A (en) * | 1969-09-17 | 1973-03-28 | Lucas Industries Ltd | Petrol injection systems for internal combustion engines |
GB1321989A (en) * | 1969-09-23 | 1973-07-04 | Lucas Industries Ltd | Engine control systems |
-
1972
- 1972-05-13 GB GB2278172A patent/GB1435098A/en not_active Expired
-
1973
- 1973-05-01 US US356128A patent/US3911872A/en not_active Expired - Lifetime
- 1973-05-03 AU AU55224/73A patent/AU470436B2/en not_active Expired
- 1973-05-11 JP JP5174673A patent/JPS5647372B2/ja not_active Expired
- 1973-05-11 IT IT49906/73A patent/IT985021B/en active
- 1973-05-11 FR FR7317171A patent/FR2184745B1/fr not_active Expired
- 1973-05-12 DE DE2324115A patent/DE2324115C2/en not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3720193A (en) * | 1967-11-27 | 1973-03-13 | Sopromi Soc Proc Modern Inject | Method and apparatus for coding and reading data governing the duration of energization of fuel injection in an internal combustion engine |
US3593692A (en) * | 1968-05-11 | 1971-07-20 | Bosch Gmbh Robert | Electrical fuel injection arrangement for internal combustion engines |
US3616780A (en) * | 1968-09-28 | 1971-11-02 | Bosch Gmbh Robert | Electrically controlled fuel injection arrangement for internal combustion engines |
US3669081A (en) * | 1969-05-23 | 1972-06-13 | Sopromi Soc Proc Modern Inject | Electronically controlled injecting arrangements feeding fuel under constant pressure into internal combustion engines |
US3689753A (en) * | 1969-09-23 | 1972-09-05 | Lucas Industries Ltd | Engine control systems |
US3592178A (en) * | 1969-10-15 | 1971-07-13 | Peter Schiff | Electronic ignition timing circuit |
US3612008A (en) * | 1970-02-16 | 1971-10-12 | Acf Ind Inc | Vacuum-responsive voltage generator for a fuel injection system |
US3752139A (en) * | 1971-11-23 | 1973-08-14 | Gte Sylvania Inc | Electronic ignition timing system for internal combustion engines |
US3780711A (en) * | 1971-12-16 | 1973-12-25 | Acf Ind Inc | Electronic fuel injection system |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3983851A (en) * | 1974-03-18 | 1976-10-05 | Hitachi, Ltd. | Electronic fuel injection apparatus |
US4172433A (en) * | 1974-12-05 | 1979-10-30 | Robert Bosch Gmbh | Process and apparatus for fuel-mixture preparation |
US4143622A (en) * | 1975-11-18 | 1979-03-13 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
US4144847A (en) * | 1975-12-27 | 1979-03-20 | Nissan Motor Company, Limited | Emission control apparatus for internal engines with means for generating step function voltage compensating signals |
US4098252A (en) * | 1976-03-23 | 1978-07-04 | Daimler-Benz Aktiengesellschaft | Method and apparatus for carrying out the method to control a multi-cylinder internal combustion engine |
US4116177A (en) * | 1977-01-21 | 1978-09-26 | Whatley Jr Norman | Pre-volatilizing electronically controlled carburetor |
US4356803A (en) * | 1980-03-07 | 1982-11-02 | Toyota Jidosha Kogyo Kabushiki Kaisha | Method and apparatus for controlling the fuel feeding rate of an internal combustion engine |
US4450815A (en) * | 1981-05-06 | 1984-05-29 | Hitachi, Ltd. | Internal combustion engine control apparatus |
US4452202A (en) * | 1981-12-24 | 1984-06-05 | Acf Industries, Inc. | Vacuum pressure transducer |
US5415144A (en) * | 1994-01-14 | 1995-05-16 | Robertshaw Controls Company | Throttle position validation method and apparatus |
WO2003023802A1 (en) * | 2001-09-11 | 2003-03-20 | Marquardt Gmbh | Electric switch |
Also Published As
Publication number | Publication date |
---|---|
GB1435098A (en) | 1976-05-12 |
IT985021B (en) | 1974-11-30 |
DE2324115A1 (en) | 1973-11-22 |
FR2184745A1 (en) | 1973-12-28 |
AU5522473A (en) | 1974-11-07 |
AU470436B2 (en) | 1976-03-18 |
DE2324115C2 (en) | 1983-12-01 |
FR2184745B1 (en) | 1976-05-28 |
JPS4961519A (en) | 1974-06-14 |
JPS5647372B2 (en) | 1981-11-09 |
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