FR2648185A1 - ELECTRICALLY CONTROLLED HANDLING DEVICE FOR THE THROTTLE GAS BUTTERFLY - Google Patents

Abstract

Devices are known for operating the throttle valve of heat engines in which the throttle is controlled by an electric motor. To allow such devices, even in the event of blockage of the electric motor, to perform starting and emergency functions, the invention provides for the electric motor 10 to act on the throttle 2 by means of a lever. gear 8 connected, elastically in both directions of rotation, to a throttle lever 5, and that a mechanical equipment of the device acts in such a way on an intermediate lever 21 connected to the throttle lever 5 that the latter and the throttle 2 can be requested by a closing spring 23. Installed in a motor vehicle, this device thus makes it possible to control breakdown situations and to drive the vehicle to a workshop.

Description

Electrically operated operating device for the.pa-

  The present invention relates to an electrically controlled operating device for the throttle valve of thermal engines; consists of an electric motor which controls the open position of the throttle valve subjected to the action of a closing spring, of mechanical equipment connected to an accelerator pedal and by means of which the maximum opening position of the throttle valve can be

  set quantitatively in advance, as well as a team-

  : .ent of control and / or regulator intended to treat signals of potentiometers with nominal value and effective value to deliver the electric control signals

to the electric motor.

  It is known to separate the throttle valve of a heat engine from the accelerator pedal, to provide a

  equipment for detecting the position of the accelerator pedal

  and allow the throttle valve to be adjusted by an electric motor according to the signal

  detector equipment and other signals.

  Thanks to the German patent application

  public show no. 3720897 a device is known

  for which it is a question of compensating for functional faults-

  electric motor by additional mechanical operating equipment which is directly connected to the pedal

  accelerator. However, this device does not allow

  thinking, or actuation, through the e-

  mechanical equipment only in the case where the torque

  electric motor command is missing. In case the engine

  electric would be blocked, for example in the idle position

  ti throttle valve, starting or emergency operation of the engine would be excluded. In addition,

  the throttle valve is directly requested by a res-

  fate acting in the opening direction, that is to say that in the event of a break in one of the mechanical stops the throttle valve would open completely, which could lead to

  unsafe operating conditions.

  In this state of the art the present invention

  tion aims, starting from an operating device of the kind defined above, to obtain, even in

  in the case of a blocked electric motor, a starting regime

  age and emergency walking in which the throttle valve

  is mainly solicited only by the action of a

closing spell.

  This object is achieved, with regard to a provision

  tif maneuvering electrically controlled for the throttle valve of thermal engines, consisting of an electric motor which controls the open position of the throttle valve subjected

  the action of a closing spring, mechanical equipment

  connected to an accelerator pedal and by means of which the maximum opening position of the throttle valve can be fixed quantitatively in advance, as well as control equipment and / or. regulator intended to process potentiometer signals with nominal value and with effective value to deliver the electrical control signals to the electric motor, according to the invention by the fact that the

  electric motor acts on the throttle valve via

  medial of a gear lever connected in an elastic manner

  that in both directions of rotation, to a butterfly lever

  lon, and that the mechanical equipment acts in such a way on an intermediate lever connected to the throttle lever that the latter and, consequently, the throttle valve, can be biased by a closing spring. Advantageously, said mechanical equipment also acts in such a way on the intermediate lever that the throttle lever and, consequently, the throttle of the

  gas may be subjected to the force of the accelerator pedal

  rator exerted in the opening direction.

  An advantageous characteristic of the invention consists in that the mechanical equipment has, for example

  compared to a projection forming a stop for the intermediate lever

  re, with a tab forming an abutment of an operating lever

  vre a first free switching interval preset at

  francni. before the solicitation by the iron spring

procedure does not begin.

  Another advantageous characteristic of the invention

  tion consists in that the mechanical equipment has, with respect to a second projection forming a stop for the intermediate lever, with the tongue forming a stop for the lever. of

  maneuver a second pre-set free tilting interval

  bli to be crossed before the stress by the pedal

accelerator does not start.

  In these two cases the operating lever is advanced

  taggingly regulates, by a stopper fixedly connected to the casing, in its position in the unloaded state of the force of the accelerator pedal. According to other characteristics of the invention, this stopper fixedly connected to the casing is on the one hand caused by a distress signal to leave the path of movement of the operating lever and can on the other hand be retained by a control unit in

  a position where said first tilt interval exists-

mentally free.

  Advantageously, said control member can maintain the stop, fixedly connected to the casing, in at least two positions and can be actuated by way

  pneumatic, hydraulic or electric.

  The advantages obtained thanks to the invention appear

  will read a sample embodiment illustrated in

attached drawing.

  The single figure schematically shows an exemplary embodiment constituted by an air suction channel 1 of a thermal motor in which a throttle valve 2 is

  fixed on a rotary throttle shaft 3. At its ends

  are located outside the air intake channel 1

  the butterfly shaft 3 respectively has a poten-

  actual value tiometer 4 and butterfly lever 5,

  the latter being subjected to the action of a spring

  zure 6 and the minimum opening position of the throttle valve 2 being adjusted by an adjusting screw 7 which penetrates

  0 in the throttle lever movement path 5.

  On the throttle shaft 3 is mounted rotating a lever & gear 8 which can be turned to the left and to the right by a pinion 9 of an electric motor 10. In the case of rotation to the right the gear lever 8, by tilting , abuts with a rod 11 forming a stop against a first branch 12 of a spring 13 whose second branch 14 then bears on a rod 15 forming a stop of the throttle lever 5 and subjects the throttle valve to a force exerted in the direction of its closure. When turning left

  the gear lever 9 and therefore also the rod 11 for-

  mant stop are brought, by tilting, against the second branch 14 of the spring 13, so that the first branch 12 biases the rod 15 forming the throttle lever stop and the throttle valve 2 opens, insofar as this is not prevented by an operating lever 16 with a tongue 17 forming an abutment, which enters the path of movement of two projections 18, 19 forming abutments of an intermediate lever 21, connected by means of a bar connection 20 to the throttle lever 5 and, in

  abutting against the projection 18 forming an abutment, puts an end to the

  opening operation imposed on the throttle lever 5 and therefore on the throttle valve 2 by the electric motor. Then a

  new rotation movement to the left of the gear lever

  swim 8 can be done against the tensioned spring 13

  between the gear lever 8 and the throttle lever 5.

  The operating lever 16 is rotatably mounted and can, by means of an accelerator cable 22, be tilted, against the force of a return spring 23, at the option of the motor user , the unloaded position of this lever being able to be determined by a stop 24 fixedly connected to the casing and which, in response to a distress signal, can get out of the way of

  movement of the operating lever 16.

  The tilting of the operating lever 16 is

  transmitted by a shaft 25, connected to the latter, to a poten-

nominal value tiometer 26.

  The stop 24 can be moved, against the

  force of closing spring 23, in the opening direction

  of the throttle valve 2 by a control member, or

  cylinder, pneumatic (shown in phantom) with condi-

  tion that the pressure applied is sufficient. In case of

  3C rotation of the operating lever 16 in the opening direction

  size of the throttle valve 2 the tongue 17 forming a stop moves on the movement path between the projections 18, 19 forming stops of the intermediate lever 21 until it stops

  against the projection forming a stop 19, so that the latter

  after a free pre-set tipping interval

  bli 27, switches in the direction of opening of the throttle valve

  gas. In case the gear lever 8 is found

  in a position corresponding to the position of

idle the spring 13 would tension.

  The operating mode of the device according to

  the invention is described below. When starting the mo-

  thermal engine the electric motor 10 receives signals

  for controlling an electrical control device not shown

  felt, so that the electric motor 10 commu-

  nique through the pinion 9 to the gear lever 8 a rotational movement that the throttle lever 5, bearing with the rod 15 forming a stop, under the action of the spring 13, against the gear lever 8 or the rod 11

  forming a stop for the latter, follows until the papil-

  we occupy an appropriate position at start-up and which is

  indicated by the actual value potentiometer 4.

  The adjustment of the throttle valve 2 for starting is not hampered by the tongue 17 forming a stop for the actuation lever 16 because a free tilting interval

  sufficiently large 28 is planned in terms of con-

  struction or established by the pneumatic control member or

  the stop 24. In the event of independent operation of the heat engine

  a power adjustment is made automatically.

  only by the electric motor following a pre-

established.

  When the engine operator performs, by the!

  with an accelerator pedal and the access cable

  leration 22 a movement of the actuating lever 16 so as to load the motor the tongue 17 forming a stop moves by turning to the right and increases the interval of

  existing free tilting 28 of the intermediate lever 21.

  Thus the electric motor 10 can, by reacting to control signals from the control apparatus, adjust the throttle valve 2 accordingly, the control signals being delivered as a function of the signals from the potentiometer at nominal value produced during movement of the operating lever 16, and actual value potentiometer signals being generated. The control signals delivered to the electric motor 10 cause a displacement, determined in time and in importance, of the throttle lever 5 relative to the displacement of the pedal

  throttle by the engine operator.

  Even in the event of a malfunction of the electric motor 10, the opening position of the throttle valve is not likely to be greater than the value preset by the operating lever 16 because the electric motor 10 cannot move the butterfly valve 2 in the opening direction only until the projection 18 forming a stop abuts against the

tongue 17 forming a stop.

  During a sudden release of the accelerator pedal

  erator damping of the closing movement can be

  operated by the electric motor. The tire control unit

  matic can hold the operating lever 16 in more

  several positions so that the electric motor 10 can adjust the throttle valve 2 for other functions, such as

  for example the function of a regulator of the so-called Tempo- type

  mat, without the effects of these functions being perceived

  at the accelerator pedal.

  In the event of malfunctions of electrical and / or electronic components, likely to cause an incorrect adjustment of the throttle valve 2 or a blockage of the electric motor 10, the throttle valve 2 is closed mechanically by releasing the accelerator pedal by spring force. The throttle valve 2 can, even when the gear lever 8 is in the idle position and is blocked by the electric motor 10, be opened by

  the accelerator pedal to a degree of opening

  finished, so that distress situations, which can

  wind occurs when the engine is used in a

  motor vehicle, can be controlled and the vehicle

  it can be taken to a workshop. If there is

  general emergency the stop 24 can be removed from the movement path of the operating lever 16. This operation can reduce the free tilting interval 28 which is provided for the idle speed in the event of departure, etc. Closing spring 6 and return spring

  23 can be made redundantly for satis-

  do with safety regulations. The force of each of these springs 6, 23 is greater than that of the spring 13 as regards

  its closing function. The controller can also

  be hydraulically or electrically actuated.

Claims (8)

  1 - Maneuvering device with electrical control for the throttle valve of thermal engines, consisting of an electric motor which controls the open position of the throttle valve subjected to the action of a closing spring-   of mechanical equipment connected to an accelerator pedal   operator and by means of which the maximum opening position   male throttle valve can be preset quantitative-   as well as control and / or regulation equipment   controller for processing potentiometer signals with   their nominal and effective value to issue the   electrical control gnals to the electric motor, charac-   characterized in that the electric motor (10) acts on the throttle valve (2) by means of a gear lever (8) connected, elastically in both directions of rotation, to a throttle lever ( 5), and in that the mechanical equipment acts in such a way on an intermediate lever connected to the throttle lever (5) as the throttle lever (5) and therefore also the throttle valve (2)   2C can be requested by a closing spring (23).   2 - operating device according to claim 1, characterized in that the mechanical equipment also acts in such a way on the intermediate lever (21) that the throttle lever (5) and therefore also the throttle valve (2) can be requested, in the opening direction,   with the force applied to the accelerator pedal.   3 - operating device according to claim 1, characterized in that the mechanical equipment has, relative to a projection (18) forming a stop of the intermediate lever (21), with a tongue (17) forming a stop   of an operating lever (16) a first interval of low   pre-established free bearing (28), before the closing spring measure does not start to be charged.   4 - operating device according to claim 2, characterized in that the mechanical equipment has, relative to a second projection (19) forming a stop of the intermediate lever (21), with the tongue (17) forming a stop of the operating lever (16) a second free tilting interval, before the accelerator pedal begins to be charged.   - Operating device according to claim 3 or 4, characterized in that the operating lever (16) is adjusted, by a stop (24) fixedly connected to the casing, in its position discharging the force applied to the accelerator pedal.   6 - operating device according to claim, characterized in that the stop (24) fixedly connected to the housing exits from the movement path of the lever   maneuver (16) in response to a distress signal.   7 - operating device according to claim 6, characterized in that the stop (24) can be maintained by a control member in a position where there is the   first free tilting interval (28).   8 - operating device according to claim   7, characterized in that the actuator can maintain the bu-   tee (24) in at least two positions.   9 - Operating device according to any one   of claims 6 to 8, characterized in that the   control can be operated pneumatically, hydraulically lique or electric.