DE7735209U1 - VEHICLE SPEED CONTROL DEVICE FOR MOTOR VEHICLES - Google Patents

Description

AUDI NSU AUTO UNION 8O7O Ingolstadt, November 10th, 1977 Aktienügesellscxiaft IG ίη-89 New / L

P.O. Box 220
8Ο7Ο Ingolstadt

Cruise control device for motor vehicles

/.-..- The fire concerns a cruise control device for motor vehicles with a coupling device between an adjusting element for adjusting the operation an internal combustion engine and a servomotor connected to a control circuit.

A vehicle speed control device the actuation of the adjusting element, for. B. an accelerator pedal, and largely automatically thus relieves the driver. However, especially in the event of danger, the driver has to return to the vehicle influence yourself and be able to safely and quickly disengage the cruise control.

A known generic cruise control device takes a speedometer on the!

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portional electrical signal, compares this signal with a target signal that the driver specifies and forms a control signal from the level deviation signal. This is fed to an electric servomotor _; which adjusts the accelerator pedal via connecting elements and thus regulates the speed. The cruise control is disengaged and switched off by an "OFF" key C or by actuating switches assigned to the brake pedal or clutch pedal. A Hagnetz tooth clutch in the servomotor is released and the connecting elements to the accelerator pedal, which are pretensioned with one each when moving from the idle position, snap back into the idle position. This frees the accelerator pedal for operation by the driver.

A peculiarity of this cruise control device is that the coupling and uncoupling of the cruise control takes place through the magnetic coupling in the actuator and between this separation point and the accelerator pedal many movement-transmitting Connecting elements such as drive pinions, toothed segments, springs and levers with hinges are arranged. The danger that parts jamming, bending, or no longer loosening and therefore the speed controller cannot be disengaged, is a given. When the connecting elements snap back into the idle position, an undesirable, loud noise is created in the passenger compartment.

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The innovation is based on the task of a generic one Cruise control device, with equivalent Function of simplifying their structure and increasing their operational reliability accordingly.

This object is achieved according to the invention in that the Coupling device 2; two components that can be displaced relative to one another and one attached to each of the two components Has latching device which contains a bolt, which by means of an electromagnet in one on the other of the two Components attached snap-in recess is indentable.

When the controller is switched off, the first step is to use the adjustment element, preferably the accelerator pedal, connected component movable independently of the second component in the idling position; the vehicle speed can be controlled by the driver with the accelerator pedal. When the controller is switched on, presses the electromagnet locks the locking device against the other component. The servomotor drives this with it in a motion-transmitting manner connected component from the idle position: as long as until the pre-tensioned bolt engages in the locking recess and thus establishes a connection between the two components and the control loop is closed. The separation takes place in reverse order and the servomotor moves the second component back to the idle position.

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This arrangement advantageously makes the coupling point direct arranged on the accelerator pedal and the magnetic coupling in the servomotor is omitted. If this clutch opens on the accelerator pedal, malfunctions can occur which are not dangerous when looking at the servomotor and controller. Chen cause driving conditions, so that the Faihr speed regulating device the mechanical structure is very safe.

So that no separate support and guide surfaces are required, "in the coupling according to the invention are advantageous "Both components as a cylinder and as a piston that can be moved in it formed, wherein the locking device is arranged on the outer circumferential wall of the cylinder and the locking recess is arranged on the piston.

If the side surfaces of the snap-in recess are bevelled, the correct Coordination of the bevel to the spring strength of the return spring of the seal through the locking device with the accelerator pedal Muscle force can be overridden, so that when the bolt is not opened can always be accelerated and no additional safety device is required.

The "two states" controller engaged or disengaged "become easier advantageously via a feedback teaching age that is associated with the seal of the locking device directly without intermediate transmission links is connected to an electronic safety circuit reported. In the event of danger, the safety circuit interrupts the circuit to the electromagnet by means of a safety switch, see above that the bolt is disengaged by spring force.

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An exemplary embodiment is shown in the drawing and is described below. The figure shows a sectional drawing through the coupling device according to the invention and a schematic circuit diagram for connecting the safety circuit.

A throttle valve 1 is arranged on an internal combustion engine, not shown, and with the accelerator pedal lever? tied together. A connecting rod 3 is attached to the accelerator pedal lever 2 a cylinder 4 is articulated, the opposite of a piston 5 telescopic is movable. The piston transmits movement through a toothed rack 8 with the servomotor 6 of a controller 7 tied together. A bar 9 is against the force of a return spring 10 by an electromagnet 11 in a latching trough 12 with inclined side surfaces on the piston 5 can be engaged. in the The circuit of the electromagnet 11 is the control switch 13 of a control circuit 14 and the safety switch 15 of a Safety circuit 16 arranged. A feedback switch 17 The seal 9 is connected to the safety circuit 16. With the switches for controller "on" 18 and controller "off" 19, brake switch 20 and clutch switch 21 are electrical circuits switchable, which are connected to both the safety circuit 16 and the control circuit 14. About a Switch 22, the controller 7 can be switched on by the control circuit 14.

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In Fig. 1, the idle position of the accelerator pedal lever 2 and the piston 5 is shown. The controller 7 is switched off and the bar 9 disengaged from the latching recess 12. When actuated of the accelerator pedal, the cylinder 4 pushes itself over the piston 5 and the speed is without any controller intervention Driver controllable. When the vehicle speed control device is switched on, the electromagnet 11 is switched on and the bar 9 is placed on the piston surface lying under its opening through the cylinder. The actuator 6 moves the piston 5 from the idle position as long as the cylinder until the bolt sliding along the piston engages in the locking recess and the cylinder and piston are connected in a force-transmitting manner are. When the cruise control is switched off, the circuit of the electromagnet 11 is controlled by the control switch 13 interrupted, the bolt 9 is disengaged by the spring, and the accelerator pedal lever 2 with the cylinder 4- is again movable independently of the piston 5. The servomotor 6 moves the piston 5 back to the idle position.

The arrangement can be pushed over by the beveled side surfaces of the latching trough 12.

The commands for switching the controller 7 and the controller off and on Electromagnets 11 are input via switches 18, 19, 20, 21 of control circuit 14 and safety circuit 16. About the feedback switch 17, the execution of the Input commands reported to the safety circuit.

7735209 öios.78

Claims (4)

AUDI NSU AUTO UNION 8Ο7Ο Ingolstadt, II.IO.1977 Aktiengesellschaft IG 1489 Neu / L Postfach 220 8Ο7Ο Ingolstadt Speed control device for motor vehicles Protection claims 1. Fafrrverkehrsregelvorrichtung for motor vehicles with a coupling device between an adjusting element for adjusting the operation of an internal combustion engine and a servomotor connected to a control circuit, characterized in that 'the coupling device ^; C has two components (^ ₁ 5) which can be moved relative to one another and a latching device attached to one of the two components which contains a bolt (9) which can be engaged by means of an electromagnet (11) in a latching recess (12) attached to the other of the two components is. -2- 7735209 05/03/78 -2- 2. Falir speed regulating device according to claim 1, characterized in that one component is a cylinder (4) and the other component can be pushed into the cylinder (4) Piston (5) is formed and the latching device on the outer peripheral wall of the cylinder (4) and the latching recess (12) is arranged on the piston. 5- cruise control device according to claim 2, characterized characterized in that the cylinder (4 ·) is licked directly on an accelerator lever (2). 4. speed control device according to one of the claims 1 to 3, characterized in that the latching recess (Ί2) has beveled side surfaces. 5- Pahxgeschwindigkeitsrege! Device according to one that is disposed on the safety circuit (16) connected feedback switch (17) of claims Λ to 4 with a safety circuit, characterized in that at the East device comprises a actuated in response to the locking position. -3- 7735209 05/03/78