JPS5815626B2 - Vehicle speed adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention comprises an actuating member actuatable by the driver of a vehicle, for example an accelerator pedal, and an electric regulator, with an electric regulator connected to the actuating member on the setpoint input side of the electric regulator. applying the output signal of the first electric position signal generator and applying the output signal of the second electric position signal generator to the actual value input side of the electric regulator; On the other hand, fuel
Adjustment of the driving speed of the motor vehicle connected to an element influencing the nitrogen-nitrogen mixture, for example a regulating element operatively connected to a throttle valve and, on the other hand, electrically actuatable and operatively connected to a servomotor via a latching device. Regarding equipment.

□ Such a device requires no adjustment member or electrical connection between the accelerator pedal and the servo motor that adjusts the throttle valve, compared to known devices that connect the accelerator pedal to the throttle valve in the engine compartment via a Bowden wire or linkage. Based on this, assembly of the device becomes very simple.

The aforementioned device also has the following effects on the adjustment force applied to the accelerator pedal:
It is also advantageous with regard to the convenience of mounting the accelerator pedal on the vehicle.

In such a device, when operating the vehicle brake or the vehicle clutch, the clutch device between the servo motor and the adjusting member is switched to deactivation, i.e. the clutch disconnects the servo motor from the adjusting member, so that the throttle valve is Due to the return spring attached to it, it can be returned to its rest position without any obstruction.

Furthermore, when the throttle valve is returned to its original position, the adjusting member and the position signal generator connected to the adjusting member are also returned to their rest positions by the throttle valve.

In some cases, for example, when the intake system freezes, the throttle valve or the spring attached to it may not be able to return from the swiveled position to the rest position, resulting in undesired abnormal operating conditions of the engine.

In order to prevent such abnormal operating conditions, the clutch device of the regulator is briefly deactivated when the vehicle brake or vehicle clutch is applied, and then the clutch is re-engaged. It has already been proposed to return a throttle valve, which may not have returned to its rest position, by means of a servomotor.

For this purpose, the servo motor must generate a predetermined minimum torque capable of returning the throttle valve to its initial position.

If freezing is severe, the link mechanism between the throttle valve and the servo motor is locked, or there is an abnormality in the clutch device between the servo motor and the link mechanism, the throttle valve will be returned to its initial position by the servo motor. I can't.

For example, if the throttle valve is stuck at or near the fully open position, a dangerous driving situation may occur that may lead to a traffic accident.

According to the invention, such drawbacks are eliminated.

It is therefore an object of the present invention to provide an improved travel speed adjustment position so that such abnormal operating conditions do not occur.

According to the invention, this task is achieved by starting the ignition of the motor vehicle engine if the output signal of the second position signal generator deviates from the output signal of the first position signal generator by a predetermined presettable value. This problem is solved by providing a device that interrupts the current circuit.

In this way, if the throttle valve becomes stuck in a position other than the rest position, the ignition current circuit of the motor vehicle engine can be interrupted and the drive train of the motor vehicle can be deactivated.

This makes it possible to prevent dangerous driving conditions from occurring due to the throttle valve becoming stuck.

It is advantageous if the device for interrupting the ignition current circuit is provided with an optical and/or acoustic alarm device which can be switched on in advance of interrupting the ignition current circuit.

In this way, the driver knows when one of the vehicle's drive systems will soon be forced to disable, and can take appropriate driving directions, such as driving on the right edge of the road.

It is likewise advantageous to provide a manually operable switch for switching off the device for interrupting the ignition current circuit.

As a result, even after the drive train has been deactivated, it is possible to start up the drive train anew, for example in order to move the vehicle out of a dangerous area.

In an advantageous embodiment of the invention, the device for interrupting the ignition current circuit has a comparator and a threshold value switch connected downstream of the comparator, the comparator having on the one hand an output of the second position signal generator. The threshold switch is connected directly or indirectly, for example via a relay, to the ignition current circuit.

The invention will now be explained with reference to illustrated embodiments.

The device of FIG. 1 has an electrical regulator 1. The device of FIG.

The electric regulator 1 essentially consists of a comparator 2, an amplifier 3 downstream of the comparator, and a regulating device 4.

The adjusting device 4 consists of an electric servo motor 5, an adjusting member 6 and an electromagnetic clutch 7 connected therebetween.

The regulator 1 also has a position signal generator 8 connected to the regulating element 6 and supplies one input of the comparator 2 with a voltage proportional to the position of the respective position signal generator 8.

A position signal generator 9, which is constructed as a variable resistor and is connected to an accelerator pedal 10 of the motor vehicle, is connected to a further input of the comparator 2, which is constructed, for example, by a series connection of two resistors.

The signals to be compared are then applied to the free ends of the two resistors of the comparator 2, and the interconnected ends of the resistors form the output of the comparator.

At the same time as the position signal generator 9, the position signal generator 8 is also connected to the comparator 1.
The output side of the comparator 11 is connected to the threshold switch 12.

The output of the threshold value switch 12 is connected on the one hand to an acoustic warning device 13 and on the other hand via a time delay circuit 14 to a switching device 15 whose switching element is connected to the ignition current circuit.

To explain the operation of the device described above, the accelerator pedal 10 has been swung from its rest position and the throttle valve 1 has been rotated for this purpose.
Assume that 6 is also rotated by a corresponding angle.

The signals occurring at the inputs of the ratio divider 2 and the comparator 11 are therefore equal, and no output appears at the threshold switch 12 due to the output signal of the comparator 11.

When the driver then takes his foot off the accelerator pedal 10, the accelerator pedal returns to its rest position.

Therefore, it is assumed that the simultaneous return of the throttle valve 16 or that the suction system is blocked by freezing.

As a result, the signal supplied from the position signal generator 8 does not change, so that a signal difference is generated between the signal coming from the position signal generator 8 and the signal coming from the position signal generator 9 in the comparator 11. The output of the comparator 11 activates the audible alarm device 13 via the threshold switch 12, and after a delay of several seconds given by the time delay device 14,
Via device 15, the ignition current circuit of the engine is interrupted.

A switch 17 is provided between the device 14 and the device 15, so that the normally closed switch 17 can be used to switch the device 15 from being activated, thereby keeping the vehicle's drive system activated. can do.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment according to the present invention. 1...Adjuster, 2,11...Comparator,
4...Adjustment device, 5...Servomorph, 6...Adjustment member, 7...Electromagnetic clutch, 8, 9...Position signal Generator, 10...
...Accelerator pedal, 12...Threshold switch, 13
...Alarm device, 14...Time delay device, 16... Throttle valve.

Claims (1)

[Scope of Claims] 1. A first electric position signal generator having an adjustment member operable by the driver of the vehicle and an electric regulator, and connected to the adjustment member at a setpoint input of the electric regulator. and the output signal of a second electric position signal generator is applied to the actual value input of the electric regulator, the second electric position signal generator being connected to the fuel In a device for regulating the driving speed of a motor vehicle, the control member is operatively connected to a member influencing the air-mixture and on the other hand is electrically actuatable and operatively connected to a servomotor via a latching device. a device 11 for interrupting the ignition current circuit of the motor vehicle engine if the output signal of the second position signal generator 8 deviates from the output signal of the first position signal generator 9 by a predetermined preset value; 12. A device characterized in that it is provided with 12 and 15. 2. Device according to claim 1, characterized in that the device for interrupting the ignition current circuit is provided with an optical and/or acoustic warning device 13 which is operatively connected before the ignition current circuit is interrupted in time. 3. A device according to claim 1, in which the device for interrupting the ignition current circuit is switched into a non-operating state via a manually operable switch 17. 4. The device for interrupting the ignition current circuit comprises a comparator 11 and a threshold switch 12 connected downstream of the comparator, the threshold switch being connected directly or indirectly to the ignition current circuit. Apparatus described in section.