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EP0326553A1 - Systeme pour le dosage regule d'air de combustion dans un moteur a combustion interne. - Google Patents

Systeme pour le dosage regule d'air de combustion dans un moteur a combustion interne.

Info

Publication number
EP0326553A1
EP0326553A1 EP87905601A EP87905601A EP0326553A1 EP 0326553 A1 EP0326553 A1 EP 0326553A1 EP 87905601 A EP87905601 A EP 87905601A EP 87905601 A EP87905601 A EP 87905601A EP 0326553 A1 EP0326553 A1 EP 0326553A1
Authority
EP
European Patent Office
Prior art keywords
throttle valve
spring
actuating shaft
return spring
torque
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.)
Granted
Application number
EP87905601A
Other languages
German (de)
English (en)
Other versions
EP0326553B1 (fr
EP0326553B2 (fr
Inventor
Peter Cornelius
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6309579&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0326553(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0326553A1 publication Critical patent/EP0326553A1/fr
Publication of EP0326553B1 publication Critical patent/EP0326553B1/fr
Application granted granted Critical
Publication of EP0326553B2 publication Critical patent/EP0326553B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/12—External control gear, e.g. having dash-pots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/107—Safety-related aspects

Definitions

  • the invention relates to a device according to the preamble of the main claim.
  • a device for adjusting the throttle valve of an internal combustion engine in a motor vehicle is known from German patent specification 1023 268.
  • This device comprises a slotted-lever mechanism, with the aid of which the straight guidance of an accelerator pedal linkage is replaced by a more easily lubricated rocker guidance.
  • a spring preloaded between two fixed stops and a rocking lever stop an increased restoring force is generated as soon as the actuating lever is brought into a position between a certain limit position I and the maximum position II.
  • a pressure point is therefore provided which indicates to the vehicle driver that a certain opening of the throttle valve has been reached (kick-down threshold).
  • a first advantage of the invention is that the problem of freezing of the throttle valve is overcome by the freezing of the throttle valve no longer being able to occur when the vehicle is parked, because the throttle valve does not assume a rest position in this state in such a way that it could freeze flat. In this way, the provision of appropriate peak drive power to tear away a flat frozen throttle valve is completely eliminated, which leads to a cost-effective design of the required control output stage in an electronic control unit.
  • Another advantage of the invention is that in the event of failure of the electronic control unit, or its power supply, or the control output stage for the throttle valve contained in this control unit, the latter assumes such a rest position due to recirculation by a spring that sufficient combustion air is still available to maintain emergency operation in the internal combustion engine can get.
  • Another advantage of the invention is that when the on-board electrical system voltage drops during start-up attempts at a low ambient temperature, no additional electrical energy has to be provided, only to provide sufficient combustion air for the internal combustion engine. to get the engine. This improves the voltage level of the vehicle electrical system, especially when the starter battery is under high stress.
  • FIG. 1 shows a schematic functional diagram of the device according to the invention for the electrically controlled metering of combustion air into an internal combustion engine
  • FIG. 2 shows a diagram of the basic course of the torque of a throttle valve rotary actuator over the position angle ⁇ of the throttle valve
  • FIG. 3 shows a schematic illustration of a practical implementation the device according to the invention.
  • the device according to the invention for the electrically controlled metering of combustion air into an internal combustion engine comprises a channel 10 for guiding combustion air 28 through which a rotatably mounted actuating shaft 12 projects, which in turn carries a throttle valve 11 which is fastened to it and thereby pivotable.
  • the adjusting shaft 12 is driven or positioned by an electromotive actuator 13; the necessary control signals are fed to the turntable via connecting lines 14.
  • the actuating shaft 12 carries a driver 18 which serves as a movable abutment for a first end 17 of a return spring 15.
  • the second end 16 this water return spring 15 is fixed in a suitable manner spatially fixed.
  • the return spring 15 generates a certain restoring torque, which the throttle valve 11 seeks to return to the closed position.
  • the lines 26a and 26b represent that surface line of the combustion air duct 10 against which the throttle valve 11 rests in the completely closed state, ie along which the throttle valve could freeze "flat" along its entire circumference.
  • the actuating shaft 12 also carries a further driver 19- A second counter-spring 21 is clamped with its one end 22 fixed in space; the second end 23 rests on an abutment 25 which is adjustable tangentially to the actuating shaft 12, so that the spring is under a certain rest tension.
  • the driver 19 connected in a rotationally fixed manner to the actuating shaft 12 has an abutment 20 which is guided by the return spring 15 and by the restoring torque transmitted via the driver 18 to the actuating shaft 12 against the resting end 23 of the counter spring 21 as a rest bearing.
  • the throttle valve 11 does not close completely and that the electromotive actuator 13 has to generate a changing torque in order to adjust the throttle valve from the maximum opening into the completely closed position, so that its bordering on the mentioned surface lines 26a and 26b abuts.
  • the throttle valve 11 thus has a certain rest opening angle ⁇ r , which can be adjusted precisely by adjusting the adjustable stop element 25.
  • FIG. 2 illustrates the course of the normalized torque Mc to be applied by the electromotive actuator 13 over the position angle ⁇ of the throttle valve 11; at the rest angle ⁇ r of the throttle valve, the directional reversal of the actuating torque occurs, so that the electromotive actuator 13, in order to bring the throttle valve 11 into the completely closed position, must generate an actuating torque with the opposite sign.
  • the slope of the torque line in the range 0 ⁇ ⁇ r is obtained by superimposing the torque characteristic for the spring 15 and for the counter spring 21.
  • the scope of the invention is not left by a different design of the springs 15 and 21, for example in the form of spiral springs or curved strip springs; the elements described can also be arranged either distributed on one side or on both sides of the throttle valve.
  • the driver 18 can also be designed as an abutment for the return spring 15 and the driver 19 with the abutment 20 for the counter spring 21 as a single body, in that both springs act on a single, rotationally fixedly connected to the actuating shaft 12 driver element, as this is illustrated in Figure 3 for completeness.

Landscapes

  • 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)

Abstract

Le système décrit autorise, en cas de défaillance de l'actuateur électrique (13) sur l'étrangleur (11) ou de la commande ou encore de l'alimentation en courant dudit actuateur, un fonctionnement en régime de secours et empêche de manière fiable un blocage de l'étrangleur (11) dans une position de repos. Il est prévu un ressort de rappel (15) à engrènement permanent avec l'arbre (12) de l'étrangleur et un ressort antagoniste (21) précontraint à engrènement partiel avec ledit arbre (12), lesquels ressorts coopèrent avec un actuateur (13) électromoteur.
EP87905601A 1986-09-13 1987-09-04 Systeme pour le dosage regule d'air de combustion dans un moteur a combustion interne Expired - Lifetime EP0326553B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3631283A DE3631283C2 (de) 1986-09-13 1986-09-13 Einrichtung zur gesteuerten Zumessung von Verbrennungsluft in eine Brennkraftmaschine
DE3631283 1986-09-13
PCT/DE1987/000404 WO1988002064A1 (fr) 1986-09-13 1987-09-04 Systeme pour le dosage regule d'air de combustion dans un moteur a combustion interne

Publications (3)

Publication Number Publication Date
EP0326553A1 true EP0326553A1 (fr) 1989-08-09
EP0326553B1 EP0326553B1 (fr) 1990-12-27
EP0326553B2 EP0326553B2 (fr) 1995-11-08

Family

ID=6309579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87905601A Expired - Lifetime EP0326553B2 (fr) 1986-09-13 1987-09-04 Systeme pour le dosage regule d'air de combustion dans un moteur a combustion interne

Country Status (5)

Country Link
US (1) US4947815A (fr)
EP (1) EP0326553B2 (fr)
JP (1) JP2865667B2 (fr)
DE (2) DE3631283C2 (fr)
WO (1) WO1988002064A1 (fr)

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Also Published As

Publication number Publication date
US4947815A (en) 1990-08-14
DE3631283C2 (de) 1999-11-25
EP0326553B1 (fr) 1990-12-27
WO1988002064A1 (fr) 1988-03-24
JP2865667B2 (ja) 1999-03-08
DE3631283A1 (de) 1988-03-24
EP0326553B2 (fr) 1995-11-08
DE3767163D1 (de) 1991-02-07
JPH02500677A (ja) 1990-03-08

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