US3850154A - Fuel control for externally ignited internal combustion engines - Google Patents

Fuel control for externally ignited internal combustion engines Download PDF

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Publication number
US3850154A
US3850154A US00370058A US37005873A US3850154A US 3850154 A US3850154 A US 3850154A US 00370058 A US00370058 A US 00370058A US 37005873 A US37005873 A US 37005873A US 3850154 A US3850154 A US 3850154A
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United States
Prior art keywords
cam
spatial
fuel control
fuel
throttle valve
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
US00370058A
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English (en)
Inventor
A Chattopadhayay
H Muller
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.)
Deutsche Vergaser GmbH and Co KG
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Deutsche Vergaser GmbH and Co KG
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Publication date
Application filed by Deutsche Vergaser GmbH and Co KG filed Critical Deutsche Vergaser GmbH and Co KG
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Publication of US3850154A publication Critical patent/US3850154A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/36—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages
    • F02M69/40—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using variably controlled air pressure, e.g. by modifying the intake air vacuum signal acting on the fuel metering device
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/32—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein

Definitions

  • ABSTRACT A fuel control for externally ignited internal combustion engines, including a movable spatial ballistic cam dependent, in a first instance, on engine rotational speed, movements of which being adapted to be transmitted to a fuel calibrating installation,'and with the spatial ballistic cam being displaceable along its longitudinal axis.
  • the spatial ballistic cam is displaceable, in second dependence, pursuant to the difference of the operative pressure of the engine combustion air present in the zones upstream and downstream of the throttle valve, so as to rotate the spatial ballistic cam about its longitudinal axis.
  • the present invention relates to a fuel control for externally ignited internal combustion engines, including a movable spatial ballistic cam dependent, in a first instance, on engine rotational speed, movements of which being adapted to be transmitted to a fuel calibrating installation, and with the spatial ballistic cam being displaceable along its longitudinal axis.
  • the prior art fuel controls possess the disadvantage that they are not suited to be manufactured in mass production, since minor differences in the throttle valve position under one and the same load condition are experienced from engine to engine, in view of which the fuel calibration or dosage cannot be correlated in the best possible or optimum mixture relationship with respect to the input or dosage of air. Furthermore, a long-term use sedimentation deposits on the throttle valve cause cummulative detrimental changes in the fuel-air mixture relationship. Additionally, it is not readily possible to compensate for the various manufacturing tolerances, which also adversely affect the fuel-air mixture relationship.
  • this task is inventively solved in that the spatial ballistic cam is displaceable, in second dependence, pursuant to the difference of the operative pressure of the engine combustion air present in the zones upstream and downstream of the throttle valve, so as to rotate the spatial ballistic cam about its longitudinal axis.
  • the pressure differential may be directly regulated by means of a valve which is dependent upon the machine temperature so as tocontrol a bypass channel circumventing the throttle valve. In that manner, temperature compensation is obtained for the running-up of the internal combustion engine.
  • the pressure difierential by means of a suitable conduit, is operatively effective on a pneumatic servomotor which has movable elements in an operative connection with the spatial ballistic cam.
  • a pneumatic servomotor which has movable elements in an operative connection with the spatial ballistic cam.
  • an adjustable throttling component having the purpose of providing a transition corrector for-the engine load changes.
  • the advantage of the invention lies particularly in that the manufacturing tolerances of the throttle valve itself, its internal components and mechanical transmission elements do not exert any effect on the fuel calibration or dosage. Also, aged or long-term sedimentation deposits on the throttle valve no longer affect the fuel dosage. According to the invention, the fuel calibration or dosage is now advantageously only dependent on the pressure differential and thereby on the volumetric flow of the engine combustion air. A further advantage lies in the ready correctability of the fuel calibration or dosage during load changes and temperature variations.
  • FIGURE of the drawing showing a preferred illustrative embodiment of a fuel control according to the present invention.
  • an air inlet passageway 1 of an internal combustion engine has combustion air flowing therethrough in the direction of the illustrated arrow.
  • An air filter 2 is located at the inlet end of the air inlet passageway.
  • a throttle valve 3 which may be actuated, as required, by means of an actuating lever 4.
  • a bypass channel 5 which circumvents throttle valve 3.
  • the free flow cross-section of the bypass channel 5 may be regulated by a thermostatic regulating valve 6, through which flows the cooling medium for the internal combustion engine, in the direction of the illustrated arrows.
  • a conduit 7 leads from a chamber 13, located downstream of throttle valve 3 in the passageway 1, through an adjustable valve element 8 into a first control pressure chamber 9 of a pneumatic servomotor 10.
  • a second control. pressure chamber 11 of the servomotor 10 communicates with the atmosphere.
  • the second control pressure chamber 11 may also be connected, as shown by chain-dotted circuit 12, with a chamber 14 in the air inlet passageway 1 which is located upstream of the throttle valve 3.
  • a spatial ballistic cam 20 is mounted on the shaft 18
  • the shaft 18 is supported in a manner so as to be rotatable and axially displaceable.
  • the supports for the shaft 18 are not illustrated.
  • a sensing lever 21 which has a sensing or contact roller 22 mounted on one thereof, is biased toward the surface of the spatial ballistic cam 20 by the action of a suitable spring (not shown), so as to maintain the contact roller 22 in constant contact with the surface of the spatial ballistic cam.
  • the sensing lever 21 is operatively connected with a rotary slide valve 23, the latter of which regulates the flow of fuel to the internal combustion engine.
  • the fuel enters the rotary slide valve 23 under constant pressure through a conduit 24. Subse- 3. quently, the fuel exits from the rotary slide valve through a dosing or calibrating conduit 25.
  • the piston 15 is displaced from its at rest position in conformance with the extent of the pressure differential. Thereby, due to its operative connection, the spatial ballistic cam 20 is rotated about its longitudinal axis. If, upon laod variation, there occurs a sudden change in the differential pressure, the damping of the throttling element 8 becomes effective so as to compensate for fuel dosing errors and control oscillations.
  • bypass passageway is increasingly throttled the lower the machine or engine temperature.
  • the bypass passageway is increasingly throttled the lower the machine or engine temperature.
  • Fuel control for externally ignited internal combustion engines comprising; a movable spatial ballistic cam responsive,in a first instance, to engine rotational speed; fuel dosage means adapted to have movements of said cam communicated thereto, said cam being displaceable along its longitudinal axis; a throttle valve; means for rotating said cam about its longitudinal axis, in a second instance, dependent upon a differential pressure of the combustion air for said engines upstream and downstream of said throttle valve; a bypass passageway circumventing said throttle valve; and valve means in said passageway for directly regulating the pressure differential in dependence upon the tem perature of said engine.
  • Fuel control as claimed in claim 1 comprising a pneumatic servomotor; and conduit means communicating said pressure differential to said servomotor, said servomotor having movable portions operatively connected to said spatial ballistic cam so as to actuate the latter in response to said pressure differentialv 3.
  • Fuel control as claimed in claim 2, comprising an adjustable valve element being positioned in said conduit means.

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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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
US00370058A 1972-06-19 1973-06-14 Fuel control for externally ignited internal combustion engines Expired - Lifetime US3850154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2229619 1972-06-19

Publications (1)

Publication Number Publication Date
US3850154A true US3850154A (en) 1974-11-26

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ID=5848014

Family Applications (1)

Application Number Title Priority Date Filing Date
US00370058A Expired - Lifetime US3850154A (en) 1972-06-19 1973-06-14 Fuel control for externally ignited internal combustion engines

Country Status (4)

Country Link
US (1) US3850154A (enrdf_load_stackoverflow)
FR (1) FR2189634B1 (enrdf_load_stackoverflow)
GB (1) GB1418543A (enrdf_load_stackoverflow)
IT (1) IT985679B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970065A (en) * 1973-06-29 1976-07-20 Diesel Kiki Co., Ltd. Fuel injection pump control system
US4084565A (en) * 1975-09-02 1978-04-18 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Combustion air supply apparatus for an internal combustion engine
US5038809A (en) * 1990-05-31 1991-08-13 Rodgers Finishing Tools, Inc. High pressure solventless mask washer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1030121A (zh) * 1987-04-16 1989-01-04 根纳·奥尔森 内燃机的喷射及控制系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE16309C (de) * 1880-08-20 1881-12-06 P Manhes Verfahren zur Gewinnung von Edelmetallen aus Kupfererzen im Bessemer-Converter
US2870759A (en) * 1955-10-31 1959-01-27 Seth E Aldridge Fuel injection system
FR1202171A (fr) * 1958-02-12 1960-01-08 Perfectionnements apportés au dosage du combustible notamment de l'essence, à injecter dans des moteurs à explosion
US2922630A (en) * 1958-05-19 1960-01-26 Gen Motors Corp Fuel injection cranking signal modifying device
US3064636A (en) * 1960-12-22 1962-11-20 Borg Warner Fuel injection idle enrichment control mechanism
US3757796A (en) * 1971-06-17 1973-09-11 Peugeot & Renault Device for regulating the flow of fuel injected into an internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596461A (en) * 1948-08-11 1952-05-13 Carter Carburetor Corp Speed presponsive valve for fuelfeeding systems
US2841129A (en) * 1954-08-04 1958-07-01 Reggio Ferdinando Carlo Engine control system
US2949102A (en) * 1957-04-29 1960-08-16 Gen Motors Corp Cold enrichment device
AU2841871A (en) * 1970-05-22 1972-11-09 Joseph Lucas (Industries) Limited Fuel injection systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE16309C (de) * 1880-08-20 1881-12-06 P Manhes Verfahren zur Gewinnung von Edelmetallen aus Kupfererzen im Bessemer-Converter
US2870759A (en) * 1955-10-31 1959-01-27 Seth E Aldridge Fuel injection system
FR1202171A (fr) * 1958-02-12 1960-01-08 Perfectionnements apportés au dosage du combustible notamment de l'essence, à injecter dans des moteurs à explosion
US2922630A (en) * 1958-05-19 1960-01-26 Gen Motors Corp Fuel injection cranking signal modifying device
US3064636A (en) * 1960-12-22 1962-11-20 Borg Warner Fuel injection idle enrichment control mechanism
US3757796A (en) * 1971-06-17 1973-09-11 Peugeot & Renault Device for regulating the flow of fuel injected into an internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970065A (en) * 1973-06-29 1976-07-20 Diesel Kiki Co., Ltd. Fuel injection pump control system
US4084565A (en) * 1975-09-02 1978-04-18 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Combustion air supply apparatus for an internal combustion engine
US5038809A (en) * 1990-05-31 1991-08-13 Rodgers Finishing Tools, Inc. High pressure solventless mask washer

Also Published As

Publication number Publication date
IT985679B (it) 1974-12-10
FR2189634A1 (enrdf_load_stackoverflow) 1974-01-25
GB1418543A (en) 1975-12-24
FR2189634B1 (enrdf_load_stackoverflow) 1976-05-07

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