US3783847A - Engine spark control and exhaust gas recirculation vacuum signal selector - Google Patents

Engine spark control and exhaust gas recirculation vacuum signal selector Download PDF

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Publication number
US3783847A
US3783847A US00312445A US3783847DA US3783847A US 3783847 A US3783847 A US 3783847A US 00312445 A US00312445 A US 00312445A US 3783847D A US3783847D A US 3783847DA US 3783847 A US3783847 A US 3783847A
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United States
Prior art keywords
servo
port
valve
spark
egr
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Expired - Lifetime
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US00312445A
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English (en)
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D Kolody
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Ford Motor Co
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Ford Motor Co
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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
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/009—EGR combined with means to change air/fuel ratio, ignition timing, charge swirl in the cylinder

Definitions

  • An engine missio control system includes exhaust gas recirculating and engine spark timing devices each normally connected respectively to axially [52] Cl 123/119 123/117 gfiy d spaced EGR and spark ports in the carburetor induction passage above the closed positionof the throttle Fozm E a? valve.
  • Valving is provided under the control of tem- 1e 0 192/ 74/866 perature changes and changes in the operation of the vehicle transmission to at times switch the connections to the exhaust recirculating device from EGR port to [56] References C'ted spark port operation and vice versa, to at times im- UNITED STATES PATENTS prove emissions while maintaining a constant vehicle 2,457,717 7/1949 Ostling 123/117 A drive quality, and at other times improve vehicle drive 2,532,069 11/1950 Mallory 123/117 A quality while maintaining a constant emission level.
  • EGR exhaust gas recirculation
  • the invention is directed to a mechanism for at times controlling EGR flow as a function of spark port vacuum signal while at other times as a function of EGR port vacuum signal, the two ports being axially spaced along the carburetor induction passage above the closed position of the throttle valve, the switching of signal sources from one port to the other being made as a function of temperature and other operating conditions.
  • FIG. 1 is a schematic illustration of an internal combustion engine emission and spark timing control embodying the invention
  • FIG. 2 is a cross-sectional view taken on a plane indicated by and viewed in the direction of the arrows 2-2 of FIG. 1;
  • FIG. 3 is a modification of the FIG. 1 showing.
  • FIG. 1 illustrates a portion 10 of one-half of a fourbarrel carburetor of a known downdraft type. It has an air horn section 12, a main body portion 14, and a throttle body 16, joined by suitable means not shown.
  • the carburetor has the usual air/fuel induction passages 18 open at their upper ends 20 to fresh air from the conventional air cleaner, not shown.
  • the passages 18 have the usual fixed area venturies 22 cooperating with booster venturies 24 through which the main supply of fuel is induced, by means not shown.
  • Flow of air and fuel through induction passages 18 is controlled by a pair of throttle valve plates 26 each fixed on a shaft 28 rotatably mounted in the side walls of the carburetor body.
  • the throttle body 16 is flanged as indicated for bolting to the top of the engine intake manifold 30, with a spacer element 32 located between.
  • Manifold 30 has a number of vertical risers or bores 34 that are aligned for cooperation with the discharge end of the carburetor induction passages 18.
  • the risers 34 extend at right angles at their lower ends 36 for passage of the mixture out of the plane of the figure to the intake valves of the engine.
  • the exhaust manifolding part of the engine cylinder head is indicated partially at 38, and includes an exhaust gas crossover passage 40.
  • the gases pass from the exhaust manifold, not shown, on one side of the engine to the opposite side beneath the manifold trunks 36 to provide the usual hot spot beneath the carburetor to better vaporize the air/fuel mixture.
  • the spacer 32 is provided with a worm-like recess 42 that is connected directly to crossover passage 40 in FIG. 1 by a bore 44. Also connected to recess 42 is a passage 46 alternately blocked or connected to a central bore or'passage 48 communicating with the risers 34 through a pair of ports 50. Mounted to one side of the spacer is a cup shaped boss 52 forming a chamber 54 through which passages 46 70. Chamber 68 is connected to atmospheric pressure through a vent 72, while chamber 70 is connected to a vacuum signal force through a line 74. Line 74 is con nected to the carburetor induction passage, in a manner to be described later.
  • valve 56 The stem 75 of valve 56 is fixed to a pair of retainers 76 that are secured to diaphragm 66 and serve as a seat for a compression spring 77 normally biasing the valve to its closed position.
  • the stem slidably and sealingly projects through a plate 78 closing chamber 54.
  • a spark port 80 is tapped into the induction passage at a point just above or aligned with the idle position of throttle valve 26, to be traversed by the edge of the throttle valve during its opening part throttle movements. This will change the vacuum level in spark port 28 as a function of the rotative position of the throttle valve, the spark port reflecting essentially atmospheric pressure in the air inlet upon closure of the throttle valve.
  • a second EGR port 82 is located above the spark port so that the latter port sees vacuum later than the spark port because it is uncovered later, for a purpose that will become clear later.
  • FlG. 1 also shows schematically an engine distributor 84 that includes a breaker plate 86 pivotably mounted at 88 on a stationary portion of the distributor and movable with respect to a cam 90.
  • the latter has a number of peaks corresponding to the number of engine cylinders. Each peak cooperates with the follower 92 of a breaker point set 94 to make and break the spark connection in a known manner for each onesixth, in this case, rotation of cam 90.
  • Pivotal movement of breaker plate 86 in a counterclockwise spark retard setting direction, or in a clockwise spark advance setting is provided by an actuator 96 slidably extending from a vacuum servo 98.
  • Servo 98 may be of a conventional construction. lt has a hollow housing 100 whose interior is divided into an atmospheric pressure chamber 102 and a vacuum chamber 104 by an annular flexible diaphragm 106.
  • the diaphragm is fixedly secured to actuator 96, and is biased in a rightward retard direction by a compression spring 108.
  • Chamber 102 has an atmospheric or ambient pressure vent, not shown, while chamber 104 is connected to a vacuum signal line 110.
  • Line 110 is also connected to the carburetor induction passage in a manner that will become clear later.
  • spark port and EGR port vacuum to the EGR servo S8 and to the spark timing control servo 98 is controlled in FIG. 1 by a conventional one-way check valve 112 and a three port electrically controlled selector valve 114.
  • the check valve 112 is located in a line 116 connecting the EGR port 82 to the EGR servo line 74.
  • Selector valve 114 includes a valve body having an inlet port 118 and two outlet ports 120 and 122, connected respectively by lines 124, 126 and 128 to spark port 80, EGR line 74, and distributor line 110.
  • Valve 114 includes a two position slide valve 130 biased by a spring 132 to an upper position shown. In this position, it connects spark port vacuum in line 124 through an angled passage 134 to distributor line 110, while blocking outlet 120.
  • a solenoid 136 when energized, pulls the valve 130 downwardly to its second position. In this position, a through passage 138 connects the spark port vacuum line 124 through port and line 126 to EGR line 74, while blocking port 122.
  • the check valve prevents bleed of lower pressures in line 74 back through the EGR port 82.
  • Solenoid 136 is connected electrically to ground through a connection 140, and through a line 142 to a battery or other suitable power source 144.
  • a pair of switches 146 and 148 located in the line control the energization of solenoid 136.
  • Switch 146 in this case is an ambient temperature sensitive thermostatic switch that is closed above, say 58F to complete the circuit, and opens when the temperature drops below that level.
  • Switch 148 on the other hand, in this case, is a vehicle transmission gear ratio condition responsive switch. That is, when the transmission associated with the engine is conditioned for high gear operation, the switch 148 is open breaking the circuit to the solenoid 136 even though switch 146 may be closed. Moving the transmission gear ratio to low or intermediate gears closes the switch 148 to complete the circuit, energize solenoid 136 (if switch 146 is closed) and move valve downwardly. This will switch spark port vacuum from distributor line 110 to EGR lines 126 and 74, close check valve 112, and cause EGR flow to be scheduled as a function of spark port vacuum changes, with the distributor being conditioned for a maximum retarded setting.
  • solenoid 136 will be energized to move valve 130 to connect spark port vacuum to the EGR valve servo, while blocking the EGR line 116 and spark timing advance line 110. Moving the transmission to high gear again breaks the circuit to the solenoid 136, and connects EGR port vacuum to the EGR servo 98 and spark port vacuum to the servo 98.
  • the spark port as a vacuum source for controlling EGR flow in low and intermediate gears
  • the EGR valve will open sooner and more often than were it connected at all times to the EGR port. Opening the EGR valve in this manner makes it possible to use a smaller EGR orifice (at the opening to the passage 46) or a distributor with more spark advance while maintaining the same emission level.
  • the EGR valve vacuum source to the EGR port provides, above 58F, the switching to a less active signal and consequently less EGR flows. Therefore, drive quality is better.
  • FIG. 3 shows a modified construction in which two single acting valves 150 and 152 are used instead of the three port, two position valve 130 of FIG. 1.
  • valve 150 is a normally closed valve opened upon energization of solenoid 154.
  • Valve 152 is a normally open valve closed upon energization of solenoid 156.
  • Valve 150 controls the connection of spark port vacuum in line 124' to EGR line 126', while valve 152 controls spark port vacuum flow to the distributor servo line 110.
  • the energizations of the solenoids 154 and 156 are controlled by the same temperature and transmission switches 146 and 148 as in FIG. 1.
  • switch 150 closes and 152 opens, routing spark port vacuum to the EGR valve line 126 while blocking vacuum fiow to spark timing servo line 110.
  • Conditioning the transmission for high gear, or the temperature rising above 58F. opens the circuit to the solenoids and connects the spark and EGR ports as shown.
  • a carburetor controlled servo system comprising in combination, a vacuum servo having a force movable member variably movable by vacuum applied thereto, a carburetor having an induction passage open at one end to ambient air at essentially atmospheric pressure and connected at its opposite end to engine intake manifold vacuum so as to subject the passage to varying engine pressure depressions, a throttle valve rotatably movable across the passage between essentially closed and wide open throttle positions, a number of pressure sensing ports in the induction passage axially spaced from each other along the induction passage and located above the closed position of the throttle valve in a position to be traversed progressively by the edge of the throttle valve as it moves from a closed position towards the wide open throttle position, means connecting the servo to one of the ports for actuating the force transmitting member, and further means for switching the connection of the servo from the one port to another of the remaining number of ports for varying the movement of the force transmitting member for the same movement of the throttle valve.
  • a servo system as in claim 1 the further means including temperature sensitive means responsive to the attainment of a predetermined temperature for switching the connection of the servo from the one port to the another port.
  • a servo system as in claim 1, the force movable member comprising a valve movable to control the recirculation of engine exhaust gases from the exhaust system to the induction system as a function of movement of the servo, the another port constituting a spark port and being located below the one port closer to the closed position of the throttle valve.
  • the further means including ambient temperature sensitive means responsive to the attainment of a predetermined engine temperature to connect the spark port to the first mentioned servo above the predetermined temperature level to increase exhaust gas recirculation flow for the same throttle valve setting as when the one port is connected to the first mentioned servo.
  • the further means including a second valve movable between first and second positions respectively blocking a connection between or connecting the spark port and the servo and a check valve in the connection between the one port and the servo operable to prevent communication of the higher pressure in the one port to the servo when the second valve is in the second position while permitting communication of the higher pressure in the one port to the servo when the second valve is in the first position.
  • the further means including an ambient temperature sensitive means responsive to the attainment of a predetermined ambient temperature level for moving the second valve from its first position to its second position.
  • the further means including additional means operable in response to the attainment of a predetermined condition of operation of a transmission associated with the engine for moving the second valve from its first position to its second position.
  • control system as in claim 9, the further means including ambient temperature sensitive means responsive to the attainment of a predetermined engine temperature level for also moving the second valve from its first position to its second position.
  • a control system as in claim 7, the second valve having three ports the first of which is connected to the spark port while a second port is connected to the first mentioned servo and the third is connected to the second servo, this first position being an at rest position and interconnecting the first and third ports, the second position interconnecting the first and second ports.
  • An engine spark timing and exhaust gas recirculation control comprising in combination, a carburetor induction passage having a throttle valve rotatably mounted therein and movable between closed and fully open positions, a spark port in the induction passage located above the closed position of the throttle valve, an exhaust gas recirculation (EGR) port located in the induction passage above and axially spaced from the spark port, an (EGR) servo having an (EGR) valve connected thereto spring biased in a closed direction and movable to an open position by vacuum applied to the servo, the (EGR) valve controlling flow of exhaust gases back into the engine induction system, first conduit means connecting the (EGR) port to the (EGR)- servo, a second servo having a force transmitting member connected thereto spring biased in one direction and connected to the movable spark adjusting member of an engine distributor and movable in opposite directions to advance or retard the spark, second conduit means connecting the spark port to the second servo, valve means interconnecting the first and second conduit
  • the further means including an ambient temperature responsive means operable above a predetermined temperature level to effect movement of the valve means from its first to its second position to provide more vacuum acting on the (EGR) servo for the same throttle opening.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US00312445A 1972-12-06 1972-12-06 Engine spark control and exhaust gas recirculation vacuum signal selector Expired - Lifetime US3783847A (en)

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US31244572A 1972-12-06 1972-12-06

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US (1) US3783847A (de)
JP (1) JPS549256B2 (de)
AU (1) AU451679B2 (de)
CA (1) CA984248A (de)
DE (1) DE2359809C2 (de)
GB (1) GB1410847A (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882740A (en) * 1971-06-30 1975-05-13 Daimler Benz Ag Process for controlling the working oil pressure as a function of engine torque for shifting elements of automatically shifted transmissions, especially for motor vehicles
US3885537A (en) * 1973-11-05 1975-05-27 Ford Motor Co Road load modulated exhaust gas recirculation system
US3893435A (en) * 1973-01-24 1975-07-08 Toyota Motor Co Ltd Exhaust gas recirculation system for automobile engines
US3901202A (en) * 1973-05-25 1975-08-26 Gen Motors Corp Vacuum bias regulator assembly
US3915133A (en) * 1973-05-07 1975-10-28 Toyota Motor Co Ltd Device for controlling the recycle of exhaust gas in an internal combustion engine
US3915035A (en) * 1974-07-29 1975-10-28 Gen Motors Corp Vacuum signal controller for transmission controlled emission device
US3930475A (en) * 1973-08-24 1976-01-06 Ford Motor Company Engine exhaust gas recirculating control
US3972472A (en) * 1973-10-12 1976-08-03 Aisin Seiki Kabushiki Kaisha Thermostatically responsive valve
US4008697A (en) * 1974-07-19 1977-02-22 Nissan Motor Co., Ltd. Internal combustion engine
US4048966A (en) * 1974-07-29 1977-09-20 Nissan Motor Company Vacuum advance control system
US4073202A (en) * 1975-05-19 1978-02-14 Nissan Motor Company, Limited System to feed exhaust gas into the intake manifold
US4100891A (en) * 1974-08-07 1978-07-18 Rockwell International Corporation Electronic fuel injection control system
US4142496A (en) * 1976-04-05 1979-03-06 Nissan Motor Company, Limited Exhaust gas recirculation system
FR2412718A1 (fr) * 1977-12-26 1979-07-20 Yamaha Motor Co Ltd Commande de moteur pour vehicule
US4174027A (en) * 1976-11-05 1979-11-13 Toyo Kogyo Co., Ltd. Exhaust gas recirculation apparatus controlled by clutch, throttle and timer
US4563998A (en) * 1983-03-09 1986-01-14 Daimler-Benz Aktiengesellschaft Control arrangement for an internal combustion engine
US5295416A (en) * 1990-09-17 1994-03-22 Honda Giken Kogyo Kabushiki Kaisha Air-fuel ratio control method for internal combustion engines

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51137036A (en) * 1975-05-22 1976-11-26 Nissan Motor Co Ltd An ignition control apparatus for a multi ignition internal combustion ngine
JPS52151418A (en) * 1976-06-11 1977-12-15 Nissan Motor Co Ltd Control system
JPS53342A (en) * 1976-06-24 1978-01-05 Nissan Motor Co Ltd Exhaust gas cleaner of internal combustion engine
JPS5321222U (de) * 1976-08-03 1978-02-22
JPS5847234Y2 (ja) * 1976-08-03 1983-10-28 いすゞ自動車株式会社 排気還流装置
JPS5381733U (de) * 1976-12-08 1978-07-06
DE2818469A1 (de) * 1978-04-27 1979-11-08 Porsche Ag Vorrichtung zur verstellung des zuendzeitpunktes fuer brennkraftmaschinen
DE3240318A1 (de) * 1982-10-30 1984-05-03 Fichtel & Sachs Ag, 8720 Schweinfurt Reibungskupplung mit zentrierter membran- bzw. tellerfeder

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457717A (en) * 1946-02-15 1948-12-28 Harnischfeger Corp Engine cooling, cylinder, jacket, and head construction
US2532069A (en) * 1948-06-04 1950-11-28 Mallory Res Co Ignition timing control for internal-combustion engines
US2659353A (en) * 1951-07-16 1953-11-17 Mallory Marion Ignition timing control means for internal-combustion engines
US3157168A (en) * 1961-01-18 1964-11-17 Holley Carburetor Co Spark control valve for ignition distributors
US3486595A (en) * 1967-05-18 1969-12-30 Rootes Motors Ltd Internal combustion engines
US3581852A (en) * 1969-10-17 1971-06-01 Gen Motors Corp Engine and parking brake controlled by transmission ratio and engine temperature
US3643526A (en) * 1970-09-28 1972-02-22 Gen Motors Corp Ignition timing and throttle position control

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444846A (en) * 1967-04-24 1969-05-20 Chrysler Corp Engine exhaust recirculation
US3605709A (en) * 1969-03-19 1971-09-20 Nissan Motor Vehicular air-pollution preventive system
FR2088638A5 (de) * 1970-04-20 1972-01-07 Brev Etudes Sibe
US3884200A (en) * 1971-08-03 1975-05-20 Ranco Inc Exhaust gas recirculation control system for internal combustion engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457717A (en) * 1946-02-15 1948-12-28 Harnischfeger Corp Engine cooling, cylinder, jacket, and head construction
US2532069A (en) * 1948-06-04 1950-11-28 Mallory Res Co Ignition timing control for internal-combustion engines
US2659353A (en) * 1951-07-16 1953-11-17 Mallory Marion Ignition timing control means for internal-combustion engines
US3157168A (en) * 1961-01-18 1964-11-17 Holley Carburetor Co Spark control valve for ignition distributors
US3486595A (en) * 1967-05-18 1969-12-30 Rootes Motors Ltd Internal combustion engines
US3581852A (en) * 1969-10-17 1971-06-01 Gen Motors Corp Engine and parking brake controlled by transmission ratio and engine temperature
US3643526A (en) * 1970-09-28 1972-02-22 Gen Motors Corp Ignition timing and throttle position control

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882740A (en) * 1971-06-30 1975-05-13 Daimler Benz Ag Process for controlling the working oil pressure as a function of engine torque for shifting elements of automatically shifted transmissions, especially for motor vehicles
US3893435A (en) * 1973-01-24 1975-07-08 Toyota Motor Co Ltd Exhaust gas recirculation system for automobile engines
US3915133A (en) * 1973-05-07 1975-10-28 Toyota Motor Co Ltd Device for controlling the recycle of exhaust gas in an internal combustion engine
US3901202A (en) * 1973-05-25 1975-08-26 Gen Motors Corp Vacuum bias regulator assembly
US3930475A (en) * 1973-08-24 1976-01-06 Ford Motor Company Engine exhaust gas recirculating control
US3972472A (en) * 1973-10-12 1976-08-03 Aisin Seiki Kabushiki Kaisha Thermostatically responsive valve
US3885537A (en) * 1973-11-05 1975-05-27 Ford Motor Co Road load modulated exhaust gas recirculation system
US4008697A (en) * 1974-07-19 1977-02-22 Nissan Motor Co., Ltd. Internal combustion engine
US3915035A (en) * 1974-07-29 1975-10-28 Gen Motors Corp Vacuum signal controller for transmission controlled emission device
US4048966A (en) * 1974-07-29 1977-09-20 Nissan Motor Company Vacuum advance control system
US4100891A (en) * 1974-08-07 1978-07-18 Rockwell International Corporation Electronic fuel injection control system
US4073202A (en) * 1975-05-19 1978-02-14 Nissan Motor Company, Limited System to feed exhaust gas into the intake manifold
US4142496A (en) * 1976-04-05 1979-03-06 Nissan Motor Company, Limited Exhaust gas recirculation system
US4174027A (en) * 1976-11-05 1979-11-13 Toyo Kogyo Co., Ltd. Exhaust gas recirculation apparatus controlled by clutch, throttle and timer
FR2412718A1 (fr) * 1977-12-26 1979-07-20 Yamaha Motor Co Ltd Commande de moteur pour vehicule
US4563998A (en) * 1983-03-09 1986-01-14 Daimler-Benz Aktiengesellschaft Control arrangement for an internal combustion engine
US5295416A (en) * 1990-09-17 1994-03-22 Honda Giken Kogyo Kabushiki Kaisha Air-fuel ratio control method for internal combustion engines

Also Published As

Publication number Publication date
AU5937373A (en) 1974-08-15
GB1410847A (en) 1975-10-22
DE2359809C2 (de) 1982-09-16
DE2359809A1 (de) 1974-06-12
JPS49100420A (de) 1974-09-24
CA984248A (en) 1976-02-24
JPS549256B2 (de) 1979-04-23
AU451679B2 (en) 1974-08-15

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