DE102017114324A1 - Actuator for influencing a rolling motion of a motor vehicle - Google Patents

Abstract

The invention relates to an actuator (1) for influencing a rolling movement of a motor vehicle, comprising two end regions (2, 3), between which a relative rotation about an axis (a) can be generated, wherein the two end regions (2, 3) with wheels (4, 5) of the motor vehicle are in operative connection, wherein the actuator (1) has a hydraulic adjusting element (6) for rotating two sections (7, 8) of the actuator (1) about the axis (a) and an oil pump (9) Beaufschlagung the hydraulic actuator (6) with hydraulic oil to influence the rotation. To provide a simple and inexpensive solution for such an actuator, the invention provides that the oil pump (9) is designed as a bidirectional pump.

Description

Field of the invention

The invention relates to an actuator for influencing a rolling motion of a motor vehicle, comprising two end regions, between which a relative rotation about an axis can be generated, wherein the two end region are in operative connection with wheels of the motor vehicle, wherein the actuator is a hydraulic actuator for rotating two sections the actuator has around the axis and an oil pump for acting on the hydraulic actuator with hydraulic oil to influence the rotation.

Background of the invention

An actuator for influencing the rolling motion of a motor vehicle is known from DE 10 2009 028 386 A1 known. It is used to accomplish roll stabilization of a motor vehicle. This is acted upon by adjusting means on the wheels of the vehicle to counteract a rolling motion. The rolling motion of the vehicle is detected by a corresponding sensor. The actuator is a pivot drive, which is arranged between halves of a suspension stabilizer. Hereby, the rolling motion can be reduced or completely suppressed. Ultimately, this is done by applying one of the rolling motion opposing torque through the actuator.

While the said solution uses an electric motor and a mechanical gear for generating the torque, with which the rolling motion is influenced, generic solutions are also known in which the actuator is a hydraulic actuator for rotating two sections of the actuator about the axis and an oil pump for pressurizing the hydraulic actuator with hydraulic oil to influence the rotation comprises.

By introducing pressurized hydraulic oil, the relative rotation of two components of the actuator can thus take place so as to produce the desired or required torque.

Specifically, in this case solutions are known in which a hydraulic pump pressure oil is generated, which is then passed through electrically operated valves in said hydraulic actuator so as to accomplish the relative rotation. In doing so, said hydraulic pump always runs in one direction and provides the pressurized oil; the control of the flow of the oil is carried out with said electrically controlled switching valves according to the required direction of rotation of the actuator.

The previously known solution using hydraulic oil to accomplish the rotation of the actuator is relatively expensive and therefore costly.

Object of the invention

The present invention has the object to further develop a generic actuator so that a simple and cost-effective solution for an actuator of the type mentioned is provided.

Summary of the invention

The solution of this problem by the invention is characterized in that the oil pump is designed as a bidirectional pump.

The oil pump is preferably connected to a motor in a rotationally fixed connection, wherein the motor can be driven in both directions of rotation.

The hydraulic connection between the oil pump and the hydraulic actuator is preferably free of switchable valves.

Finally, it can be provided that the oil pump is connected via at least one hydraulic line with an oil tank.

With the proposed embodiment of an actuator for influencing the rolling motion of a motor vehicle, a simple construction becomes possible because electrically controlled changeover valves are unnecessary. The required in this regard function of now no longer existing changeover valves is possible through the operated in both directions oil pump.

Thus, a cost-effective solution for a roll stabilizer of a motor vehicle can be realized. Instead of the electrically switchable changeover valves used so far, the design provided according to the invention with a bidirectional pump allows the suction and pressure side of the hydraulic control element to be acted upon by pressure oil as required, depending on the direction of rotation of the motor and thus also of the bidirectional pump.

list of figures

• 1 schematisch in perspektivischer Ansicht einen Aktuator zur Beeinflussung einer Wankbewegung eines Kraftfahrzeugs und
• 2 schematisch den Schnitt senkrecht zur Achse des hydraulischen Stellelements des Aktuators sowie die hierfür vorgesehene Versorgung mit Drucköl.

In the figures, an embodiment of the invention is shown. Show it:

• 1 schematically in perspective view an actuator for influencing a rolling motion of a motor vehicle and
• 2 schematically the section perpendicular to the axis of the hydraulic actuator of the actuator and the supply of pressurized oil provided for this purpose.

Detailed description of the figures

In 1 is an actuator 1 shown schematically, for generating a torque M serves, with which the roll behavior of a motor vehicle can be influenced. The two end areas 2 and 3 of the actuator 1 are each with a bike 4 respectively. 5 connected to the motor vehicle, the wheels 4 . 5 are only indicated. Details of the structure of a system for influencing the roll behavior of a motor vehicle are in the DE 10 2009 028 386 A1 to which reference is expressly made. In that regard, further explanations on the basic structure of such a system are unnecessary at this point.

For the functioning of the actuator 1 it is necessary that between a section 7 and a portion 8 of the actuator 1 a relative rotation about the axis a can be done, including a hydraulic actuator 6 is used. The section perpendicular to the axis a by said hydraulic actuator 6 is together with a schematic representation of the supply of pressure oil in 2 shown.

Here, first of all, that the housing 16 of the hydraulic actuator 6 with the section 7 rotatably connected while the rotor 17 of the hydraulic actuator 6 with the section 8th rotatably connected. If the in 2 shown chambers of the hydraulic actuator 6 , Which are designed for receiving pressurized oil, acted upon selbigem, there is a relative rotation between the housing 16 and rotor 17 and thus for generating the above-mentioned torque M ,

The supply of the hydraulic actuator 6 with pressure oil is carried out by an oil pump 9 , which is designed according to the invention as a bidirectional pump. Accordingly, depending on the direction of rotation of the oil pump 9 the direction of the oil flow. The oil pump 9 is from a motor 10 driven, which can be operated in both directions.

About hydraulic connections 11 and 12 it will be from the oil pump 9 pressurized hydraulic oil into the hydraulic actuator 6 guided, depending on the direction of rotation of the oil pump 9 the direction of relative rotation between housings 16 and rotor 17 to accomplish.

The supply of the oil pump 9 with hydraulic oil done by an oil tank 15 out, with hydraulic lines 13 and 14 with the oil pump 9 communicates. In the hydraulic lines 13 and 14 are each check valves 18 and 19 arranged to supply the oil pump 9 with hydraulic oil from the oil tank 15 ensure, however, to prevent leakage of pressure oil from the system.

LIST OF REFERENCE NUMBERS

1

actuator

2

end

3

end

4

wheel

5

wheel

6

hydraulic actuator

7

Section of the actuator

8th

Section of the actuator

9

oil pump

10

engine

11

hydraulic connection

12

hydraulic connection

13

hydraulic line

14

hydraulic line

15

oil tank

16

casing

17

rotor

18

check valve

19

check valve

a

axis

M

torque

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102009028386 A1 [0002, 0015]

Claims (4)

Actuator (1) for influencing a rolling movement of a motor vehicle, comprising two end regions (2, 3), between which a relative rotation about an axis (a) can be generated, wherein the two end regions (2, 3) are provided with wheels (4, 5 ) of the motor vehicle are in operative connection, wherein the actuator (1) comprises a hydraulic adjusting element (6) for rotating two sections (7, 8) of the actuator (1) about the axis (a) and an oil pump (9) for acting on the hydraulic actuating element (6) with hydraulic oil for influencing the rotation, characterized in that the oil pump (9) is designed as a bidirectional pump. Actuator after Claim 1 , characterized in that the oil pump (9) with a motor (10) is in a rotationally fixed connection, wherein the motor (10) can be driven in both directions of rotation. Actuator after Claim 1 or 2 , characterized in that the hydraulic connection (11, 12) between the oil pump (9) and the hydraulic actuator (6) is free of switchable valves. Actuator after one of Claims 1 to 3 , characterized in that the oil pump (9) via at least one hydraulic line (13, 14) with an oil tank (15) is in communication.

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