US3763974A - Manifold vacuum control for power brakes - Google Patents

Manifold vacuum control for power brakes Download PDF

Info

Publication number
US3763974A
US3763974A US00251387A US3763974DA US3763974A US 3763974 A US3763974 A US 3763974A US 00251387 A US00251387 A US 00251387A US 3763974D A US3763974D A US 3763974DA US 3763974 A US3763974 A US 3763974A
Authority
US
United States
Prior art keywords
intake manifold
brake pedal
valve
depression
servo
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
US00251387A
Other languages
English (en)
Inventor
E Neal
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.)
CONVENTRY CLIMAX ENG Ltd
Original Assignee
CONVENTRY CLIMAX ENG 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 CONVENTRY CLIMAX ENG Ltd filed Critical CONVENTRY CLIMAX ENG Ltd
Application granted granted Critical
Publication of US3763974A publication Critical patent/US3763974A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/103—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • ABSTRACT A vehicle having a diesel engine with a fuel supply controlled other than in dependence upon thepressure in the air intake manifold, and a servo assisted braking system the servo unit of which is connected directly to the intake manifold and is activated for application of the brakes by pressure reduction in the intake manifold upon actuation of :a choke valve which throttles the air entering the intake manifold. Depression of a brake pedal will close the valve, the depression of an accelerator pedal will force the valve open regardless of the brake pedal position.
  • a vehicle has a diesel engine with a fuel supply controlled other than in dependence upon the pressure in the air intake manifold, and a servo assisted braking system the servo unit of which is connected directly to the intake manifold and is activated for application of the brakes by a depression in the intake manifold upon actuation of a choke valve which throttles the air entering the intake manifold.
  • the choke valve may be a butterfly valve and may be actuated, for example, by movement or loading of the brake foot pedal or linkage, or through a linkage with the accelerator controls.
  • FIG. I shows a choke valve operated by a vehicle accelerator pedal
  • FIG. 2 shows a choke valve operated by a vehicle brake pedal
  • FIG. 3 shows the operation of a brake pedal operated choke having an accelerator override
  • FIGS. 3a, 3b and 3c show the operation of the choke of FIG. 3 with the two pedals at different positions.
  • FIG. 1 shows a vehicle diesel engine 1 having an airintake 2 in which a butterfly valve 3 is positioned.
  • the valve 3 is operated to restrict the air-intake by an accelerator pedal 4, to which the valve is attached by a rigid linkage 5,5.
  • the linkage 5,5 is such that the valve 3 is closed," that is in its maximum throttling position, when the accelerator pedal 4 is in the idle" position, that is when the engine isjust idling.
  • a brake servo unit 6 is connected directly through a conduit 7 into the airintake manifoldbetween the valve 3 and the engine 1.
  • Closure of the valve 3 upon release of the accelerator pedal reduces the pressure by up to 27 inches of mercury on the engine side of the valve and thus provides to the unit 6 the vacuum necessary for the servo operation of the brakes of the vehicle, under the control of a separate brake pedal (not shown).
  • FIG. 2 shows a system in which a brake pedal 8 is connected via a rigid linkage 9,5 so that depression of the brake pedal 8 to applythe brakes closes the valve 3 thus simultaneously activating the brake servo 6.
  • FIG. 3 a system is shown which is similar to that in FIG. 2, but it also has an accelerator override.
  • the rigid brake pedal linkage 9 is attached at one end to the lever 5' which operates the valve 3, and at the other end is attached by a spring connection 10 to the brake pedal 8.
  • the rigid accelerator linkage 5 is attached at one end to the accelerator pedal 4 and at the other end to a slotted link 11 which is slidable on link pin 12 on the lever 5'.
  • the configuration shown in FIG. 3 is the case in which neither the brake pedal 8 nor accelerator pedal 4 are in use, the valve 3 is therefore open and thus the servo 6 is only activated under a low vacuum.
  • FIG. 3a shows the footbrake 8 in use, the linkage 9 causing the valve 3 to be closed thereby fully activating the servo.
  • the engine is just idling, the accelerator 4 being unused.
  • FIG. 3b the accelerator 4 is in operation, the engine thereby being at speed, and the footbrake 8 is not in use.
  • the valve 3 remains open and there is unrestricted air-flow to the engine.
  • FIG. 30 shows the accelerator override in operation.
  • the footbrake 8 is in use, but power is required of the engine, for example to drive a subsidiary function such as a load lifting mechanism, and so the accelerator 4 is also in use.
  • the use of the accelerator 4 maintains the valve 3 open or partially open and thus the spring 10 is compressed by movement of the linkage 9.
  • the vacuum applied to the brake servo 6 will be small but still sufficient to hold the vehicle stationary on the footbrake.
  • a servo unit of said braking system is connected directly to said air intake manifold and activated for application of the brakes by a depression in said intake manifold,
  • said brake pedal and accelerator control are connected to said choke valve by linkages such that, while actuation of said brake pedal will close said choke valve to create a depression in said manifold when said accelerator control is in its'idle position, the actuation of said accelerator control will open said choke valve,

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US00251387A 1971-05-12 1972-05-08 Manifold vacuum control for power brakes Expired - Lifetime US3763974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1449171A GB1388671A (en) 1971-05-12 1971-05-12 Vehicle controls

Publications (1)

Publication Number Publication Date
US3763974A true US3763974A (en) 1973-10-09

Family

ID=10042162

Family Applications (1)

Application Number Title Priority Date Filing Date
US00251387A Expired - Lifetime US3763974A (en) 1971-05-12 1972-05-08 Manifold vacuum control for power brakes

Country Status (4)

Country Link
US (1) US3763974A (OSRAM)
DE (1) DE2223168A1 (OSRAM)
FR (1) FR2137707B1 (OSRAM)
GB (1) GB1388671A (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899708A (en) * 1987-11-25 1990-02-13 Alfred Teves Gmbh Vacuum-generating device
US6223716B1 (en) 1998-04-16 2001-05-01 Mitsubishi Denki Kabushiki Kaisha Fuel control system for cylinder injection type internal combustion engine
US20110183812A1 (en) * 2010-08-24 2011-07-28 Ford Global Technologies, Llc Method and system for controlling engine air

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19647092B4 (de) * 1996-11-14 2016-02-25 Robert Bosch Gmbh Verbrennungsmotorsteuerungsverfahren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899708A (en) * 1987-11-25 1990-02-13 Alfred Teves Gmbh Vacuum-generating device
US6223716B1 (en) 1998-04-16 2001-05-01 Mitsubishi Denki Kabushiki Kaisha Fuel control system for cylinder injection type internal combustion engine
US20110183812A1 (en) * 2010-08-24 2011-07-28 Ford Global Technologies, Llc Method and system for controlling engine air
US8343011B2 (en) * 2010-08-24 2013-01-01 Ford Global Technologies, Llc Method and system for controlling engine air
US8821349B2 (en) 2010-08-24 2014-09-02 Ford Global Technologies, Llc Method and system for controlling engine air

Also Published As

Publication number Publication date
GB1388671A (en) 1975-03-26
DE2223168A1 (de) 1972-11-30
FR2137707A1 (OSRAM) 1972-12-29
FR2137707B1 (OSRAM) 1976-08-06

Similar Documents

Publication Publication Date Title
US5259349A (en) Device for the adjustment of a throttle valve
US4077370A (en) Internal combustion engine fuel economy improvement system
EP0147740A2 (en) Vacuum-boosting device
US3763974A (en) Manifold vacuum control for power brakes
US2721629A (en) Vacuum means for braking vehicles equipped with a diesel engine
US3794004A (en) Throttle pedal controlled throttle override system
US9115677B2 (en) Proportional flow venturi vacuum system for an internal combustion engine
US3744470A (en) Engine anti-diesel control
US3022849A (en) Throttle actuator
US3891071A (en) Transient brake application upon accelerator release
US6719116B2 (en) Air assisted vehicle clutch linkage
US4211312A (en) Emergency brake system for vehicles
US3792761A (en) Throttle override controlled by a vacuum boosted power brake system
US2871999A (en) Brake control system
JPS5830415A (ja) 内燃機関の過給装置
US3104741A (en) Vehicle control mechanism
US2877880A (en) Automatic automobile brake
US3757913A (en) Brake actuated throttle closure system
US2522835A (en) Brake holding device
US2767697A (en) Engine as a brake
US2966565A (en) Control device for brake-holding mechanism
US2902013A (en) Internal combustion engine control systems
JPS6042205Y2 (ja) 減速時の空燃比制御装置
US4117811A (en) Throttle valve positioner
JPS6143642Y2 (OSRAM)