US3707892A - Transmission controlled throttle for internal combustion engine - Google Patents

Transmission controlled throttle for internal combustion engine Download PDF

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Publication number
US3707892A
US3707892A US00063197A US3707892DA US3707892A US 3707892 A US3707892 A US 3707892A US 00063197 A US00063197 A US 00063197A US 3707892D A US3707892D A US 3707892DA US 3707892 A US3707892 A US 3707892A
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US
United States
Prior art keywords
throttle valve
automatic transmission
engine
internal combustion
neutral
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
US00063197A
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English (en)
Inventor
T Kuroda
Y Tatsutomi
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.)
Mazda Motor Corp
Original Assignee
Toyo Kogyo 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 Toyo Kogyo Co Ltd filed Critical Toyo Kogyo Co Ltd
Application granted granted Critical
Publication of US3707892A publication Critical patent/US3707892A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • 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
    • F02D2700/0225—Control of air or mixture supply
    • F02D2700/0228—Engines without compressor
    • F02D2700/023—Engines without compressor by means of one throttle device
    • F02D2700/0241—Engines without compressor by means of one throttle device depending on another parameter
    • 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
    • F02D2700/07—Automatic control systems according to one of the preceding groups in combination with control of the mechanism receiving the engine power

Definitions

  • a throttle 52 U.S. c1 ..74/873, 74/860 valve control Slightly Opens or closes the throttle valve 51 1111.01.
  • the quantity of the air discharge from the pump decreases so that it cannot supply sufficient secondary air to the exhaust system and further the unburned detrimental components contained in the exhaust gas increase.
  • the idling speed of the engine in transmission drive position is raised, the idling speed of the engine in transmission neutral position becomes very high accordingly so that the fuel consumption of the engine becomes very high, which is not preferable.
  • the shock in case that the transmission is shifted from neutral to drive position, or the shock raised due to the abrupt completion of the power train from the rotating engine to the wheels becomes extremely large.
  • an object of the present invention to eliminate the aforementioned disadvantages of'the conventional system and to provide a novel and improved fuel supply system for an internal combustion engine in combination with an automatic transmission, having a throttle valve control means for opening the throttle valve of a carburetor in the drive position of the transmission to a greater extent than that in the neutral position thereof when the gear train is shifted from neutral to drive position, which may always hold the idling engine speed in neutral and drive positions to a predetermined value.
  • FIGURE is a schematic view of one embodiment of a fuel supply system for an internal combustion engine according to this invention.
  • Reference numeral 1 designates a throttle valve disposed in an air intake passage 2 of a carburetor for supplying an air-fuel mixture to an internal combustion engine 16.
  • a lever 3 is fixed to a rotary shaft of the throttle valve 1, and spring 3d urges the throttle valve 1 to close position.
  • a solenoid valve means 4 is connected to the intake passage 2 of the carburetor through a vacuum conduit 5 to a diaphragm device 6 through a vacuum passage 7.
  • a diaphragm 8 is carried in diaphragm device 6 and a spring 9 is disposed within a vacuum chamber 10 for urging the diaphragm 8 outwardly.
  • a rod 11 fixed to the diaphragm 8 urges the lever 3 clockwise.
  • the vacuum conduit 5 and vacuum passage 7 constitute a conduit for introducing the vacuum within the air intake passage 2 to the vacuum chamber 10 of the diaphragm device 6.
  • the opening position (designated by a solid line in the drawing) of the throttle valve 1 during idling speed of the engine when the vacuum is not applied to the vacuum chamber 10 of the diaphragm device 6, is so provided, that the throttle valve opening becomes larger by a predetermined amount over that (shown by a dotted line in the drawing) for the throttle valve 1 during the idling operation of the engine when the vacuum within the vacuum chamber 10 is applied.
  • the solenoid valve means 4 includes a solenoid coil 12 and a valve 15 driven by the solenoid.
  • the solenoid coil 12 is connected to a source of electric power 14 through a switch 13.
  • the switch 13 is opened or closed by a signal from a sensing means 18.
  • the sensing means 18 is connected to the automatic transmission 17 for generating a first signal when the automatic transmission 17 is in a drive position and the second signal when the automatic transmission 17 is in a neutral position;
  • the solenoid 12 When the solenoid 12 is energized, the passage consisting of the vacuum conduit 5 and vacuum passage 7 is opened by the valve 15 of the solenoid valve means 4.
  • the solenoid 12 is deenergized, the valve 15 closes the passage defined by the vacuum conduit 5 and vacuum passage 7.
  • the switch 13 is so provided that it closes in the neutral position of the transmission while it opens in the drive position thereof.
  • the switch 13 is closed by the second signal from the sensing means 18 with the result that the solenoid 12 is energized. Accordingly, since the valve 15 of the sole noid valve means 4 opens the passage formed by the vacuum conduit 5 and the vacuum passage 7, vacuum is applied to the vacuum chamber of the diaphragm device 6. As a result, the rod 11 moves together with the diaphragm 8, so that the opening of the throttle valve 1 decreases as seen by the dotted lines in the drawing via spring 3d, with the result that in engine idling operation and in the neutral position of the gear train, the engine speed may be lowered as much as possible in order to remove the unburned detrimental component of the exhaust gas.
  • rod 11 is urged downwardly by spring 9 acting against spring 3a, so that the lever 3 rotates clockwise to open the throttle valve 1 to the solid line position in the drawing. If follows that the opening of the throttle valve in idling operation of the engine is larger by a predetermined amount than that in idling operation during neutral position of the transmission.
  • the lever 3 for rotating the throttle valve 1 is controlled by the diaphragm device 6 connected through the conduit to the air intake passage 2 of the carburetor.
  • the switch 13 opening or closing in response to the shift in the gear train between neutral and drive positions is connected to the solenoid valve means 4 opening or closing the conduit with the result that the opening of the throttle valve upon idling operation of the internal combustion engine in the drive position of the transmission becomes larger by a predetermined amount over that of the throttle valve upon idling operation of the internal combustion engine in the neutral position of the transmission.
  • the shifting shock becomes very small since the idling speed in the neutral position of the transmission is decreased as much as possible when the gear train is shifted from the neutral position to drive position, the shifting shock becomes very small.
  • this system may decrease the content of the unburned detrimental components contained in the exhaust gas upon idling operation of the engine in the drive position of the transmission.
  • t oilftlfi'd s riliefii sg filf 'iilil means that the switch 13 is OFF in the neutral position so that the valve 15 of the solenoid valve means 4 opens the conduit, while the switch 13 becomes ON to close the valve 15.
  • t oilftlfi'd s riliefii sg filf 'iilil means that the switch 13 is OFF in the neutral position so that the valve 15 of the solenoid valve means 4 opens the conduit, while the switch 13 becomes ON to close the valve 15.
  • the diaphragm device may be omitted so that the lever 3 is directly pushed by rod 15 moved by means of solenoid 12. Further, it should be also understood that shifting between the neutral and drive position of the gear train may directly control the throttle valve through the linkage mechanism. Further, it should be understood that the signal oil pressure shifting the gear train between the neutral and drive position may directly control the throttle valve.
  • a fuel supply system for an internal combustion engine having an automatic transmission comprising:
  • an air and fuel supply means for supplying a combustion mixture to the internal combustion engine including an inlet passage to the engine and a throttle valve therein;
  • sensing means operatively connected to the automatic transmission for generating a first signal when the automatic transmission is in a neutral position and a second signal when the automatic transmission is in a drive position;
  • throttle valve control means operatively connected to said sensing means and responsive to the signals of the sensing means for positioning the throttle valve in the inlet passage in a relatively open position when the automatic transmission is in the drive position in response to said second signal and in a relatively closed position when the automatic transmission is in a neutral position in response to said first signal whereby the engine speed will be maintained when the engine is placed under the drive load by the automatic transmission.
  • the sensing means includes a two-position switch which opens upon shifting the automatic transmission from the neutral position to the drive position
  • the throttle valve control means including a diaphragm device having a conduit communicating with the inlet passage and a solenoid valve means connected in said conduit and being operatively connected to said switch for opening the conduit by closing the two-position switch, whereby the diaphragm device operates to close the throttle valve to maintain the idling speed of the engine to a predetermined value when the automatic transmission moves to the neutral position, and further including biasing means opposing said vacuum operated diaphragm means to move said throttle valve control means to a predetermined open position to open the throttle valve so as to prevent the engine speed from lowering due to the transmission load when the automatic transmission is shifted from neutral to a drive position, said conduit being blocked by said solenoid valvemeans.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US00063197A 1969-08-11 1970-08-11 Transmission controlled throttle for internal combustion engine Expired - Lifetime US3707892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1969076467U JPS4942491Y1 (enrdf_load_stackoverflow) 1969-08-11 1969-08-11

Publications (1)

Publication Number Publication Date
US3707892A true US3707892A (en) 1973-01-02

Family

ID=33242730

Family Applications (1)

Application Number Title Priority Date Filing Date
US00063197A Expired - Lifetime US3707892A (en) 1969-08-11 1970-08-11 Transmission controlled throttle for internal combustion engine

Country Status (4)

Country Link
US (1) US3707892A (enrdf_load_stackoverflow)
JP (1) JPS4942491Y1 (enrdf_load_stackoverflow)
DE (1) DE2039456A1 (enrdf_load_stackoverflow)
FR (1) FR2056813A5 (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765273A (en) * 1972-11-28 1973-10-16 Re Kase Inc Vacuum modulator control for automatic automobile transmission
JPS517619A (ja) * 1974-07-12 1976-01-22 Honda Motor Co Ltd Jidohensokukitsukisharyoniokeru enjinno sadoseigyosochi
US4026168A (en) * 1974-01-28 1977-05-31 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas purification system
US4164157A (en) * 1976-10-29 1979-08-14 Shigetaka Hada Device for adjusting ignition timing in a motor-cycle provided with fluid coupling
US4290323A (en) * 1976-04-22 1981-09-22 Reinhard Gospodar Apparatus for controlling the closing limit of a carburetor throttle valve
US4312310A (en) * 1978-04-24 1982-01-26 Snamprogetti, S.P.A. Pollution-preventing and driving device for internal combustion engines
DE3422370A1 (de) * 1983-06-16 1984-12-20 Honda Giken Kogyo K.K., Tokio/Tokyo Verfahren zur regelung der einer verbrennungskraftmaschine zugefuehrten ansaugluftmenge
US4513638A (en) * 1981-04-04 1985-04-30 Honda Giken Kogyo Kabushiki Kaisha Control mechanism for selective creep of an automatic transmission
US4760823A (en) * 1985-06-24 1988-08-02 Honda Giken Kogyo Kabushiki Kaisha Method for control of idle rotations of internal combustion engine
US4803898A (en) * 1986-01-13 1989-02-14 Honda Giken Kogyo Kabushiki Kaisha Apparatus for detecting a neutral state of a transmission gear of a vehicle engine system
US4848189A (en) * 1988-07-25 1989-07-18 General Motors Corporation Engine throttle stop control system
US20190323444A1 (en) * 2017-01-24 2019-10-24 Nissan Motor Co., Ltd. Vehicle control method and vehicle control apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790219A (en) * 1980-11-27 1982-06-04 Fuji Heavy Ind Ltd Neutral detecting method for automatic vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251516A (en) * 1937-04-03 1941-08-05 Dorner Ernst Control device for carburetors on motor vehicles
US2762235A (en) * 1953-09-10 1956-09-11 Gen Motors Corp Apparatus for controlling engine idling speed
US2822701A (en) * 1954-06-15 1958-02-11 Gen Motors Corp Apparatus for controlling engine idling speed
US2913921A (en) * 1956-03-05 1959-11-24 Acf Ind Inc Carburetor throttle control
US3253773A (en) * 1964-12-28 1966-05-31 Gen Motors Corp Refrigerating apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251516A (en) * 1937-04-03 1941-08-05 Dorner Ernst Control device for carburetors on motor vehicles
US2762235A (en) * 1953-09-10 1956-09-11 Gen Motors Corp Apparatus for controlling engine idling speed
US2822701A (en) * 1954-06-15 1958-02-11 Gen Motors Corp Apparatus for controlling engine idling speed
US2913921A (en) * 1956-03-05 1959-11-24 Acf Ind Inc Carburetor throttle control
US3253773A (en) * 1964-12-28 1966-05-31 Gen Motors Corp Refrigerating apparatus

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765273A (en) * 1972-11-28 1973-10-16 Re Kase Inc Vacuum modulator control for automatic automobile transmission
US4026168A (en) * 1974-01-28 1977-05-31 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas purification system
JPS517619A (ja) * 1974-07-12 1976-01-22 Honda Motor Co Ltd Jidohensokukitsukisharyoniokeru enjinno sadoseigyosochi
US4290323A (en) * 1976-04-22 1981-09-22 Reinhard Gospodar Apparatus for controlling the closing limit of a carburetor throttle valve
US4164157A (en) * 1976-10-29 1979-08-14 Shigetaka Hada Device for adjusting ignition timing in a motor-cycle provided with fluid coupling
US4312310A (en) * 1978-04-24 1982-01-26 Snamprogetti, S.P.A. Pollution-preventing and driving device for internal combustion engines
US4513638A (en) * 1981-04-04 1985-04-30 Honda Giken Kogyo Kabushiki Kaisha Control mechanism for selective creep of an automatic transmission
DE3422370A1 (de) * 1983-06-16 1984-12-20 Honda Giken Kogyo K.K., Tokio/Tokyo Verfahren zur regelung der einer verbrennungskraftmaschine zugefuehrten ansaugluftmenge
US4760823A (en) * 1985-06-24 1988-08-02 Honda Giken Kogyo Kabushiki Kaisha Method for control of idle rotations of internal combustion engine
US4803898A (en) * 1986-01-13 1989-02-14 Honda Giken Kogyo Kabushiki Kaisha Apparatus for detecting a neutral state of a transmission gear of a vehicle engine system
US4848189A (en) * 1988-07-25 1989-07-18 General Motors Corporation Engine throttle stop control system
US20190323444A1 (en) * 2017-01-24 2019-10-24 Nissan Motor Co., Ltd. Vehicle control method and vehicle control apparatus
US11840973B2 (en) * 2017-01-24 2023-12-12 Nissan Motor Co., Ltd. Vehicle control method and vehicle control apparatus

Also Published As

Publication number Publication date
JPS4942491Y1 (enrdf_load_stackoverflow) 1974-11-20
DE2039456A1 (de) 1971-06-16
FR2056813A5 (enrdf_load_stackoverflow) 1971-05-14

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