DE19829823A1 - Actuator drive for motor vehicle central door locking - Google Patents

Actuator drive for motor vehicle central door locking

Info

Publication number
DE19829823A1
DE19829823A1 DE19829823A DE19829823A DE19829823A1 DE 19829823 A1 DE19829823 A1 DE 19829823A1 DE 19829823 A DE19829823 A DE 19829823A DE 19829823 A DE19829823 A DE 19829823A DE 19829823 A1 DE19829823 A1 DE 19829823A1
Authority
DE
Germany
Prior art keywords
electric motor
temperature
drive
voltage
motor
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.)
Withdrawn
Application number
DE19829823A
Other languages
German (de)
Inventor
Sven Dr Lehmann
Dieter Peterson
Klaus Wiese
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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
Priority to DE19729859 priority Critical
Application filed by Volkswagen AG filed Critical Volkswagen AG
Priority to DE19829823A priority patent/DE19829823A1/en
Publication of DE19829823A1 publication Critical patent/DE19829823A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00Power-actuated vehicle locks
    • E05B81/24Power-actuated vehicle locks characterised by constructional features of the actuator or the power transmission
    • E05B81/25Actuators mounted separately from the lock and controlling the lock functions through mechanical connections

Abstract

The central locking actuator has an electric motor. The power supply, to the motor, is temperature dependent for production of its electrical power and/or the motor has a temperature dependent performance. The drive has preset limiting values of power and -or temperature for reliable operation of the motor (8). The motor has a brake (1), which operates for compensation of differing powers and-or temperatures, to increase the performance of the motor towards a preset performance value.

Description

The invention relates to a drive according to the preamble of the main claim.

As is also known, for example, from DE 196 37 594 A1, contains in the preferred Use of the invention, namely as a central door lock in a motor vehicle, the Drive an electric motor, which is powered by the on-board battery of the motor vehicle and which is followed by a clutch, which in turn works on a spindle; one on the Spindle running nut serves to decrease the mechanical drive power of this Drive. The drive must be designed in such a way that it can be used for a given limit value electrical voltage of the voltage source and / or at a predetermined critical Temperature value is still working properly. In a motor vehicle it is from the battery electrical voltage output is temperature-dependent to a relatively large extent; it sinks with decreasing temperature. If the battery is defective, it can be used electrical voltage but also at high temperatures below the nominal value lie. Even then - at least in a relatively wide voltage range - the drive must be designed so that it still works safely when the voltage drops.

On the other hand, there is also the mechanical one emitted by the electric motor Performance a function of temperature, namely the mechanical output decreases Performance with increasing temperature. In this context, too Design of the drive to ensure that it is in a large area, here one wide temperature range, works perfectly. For example, one can Set limit temperature of 80 ° C.

In the most general case, in a drive of the type described both have electrical voltage provided by the voltage source as well as that of the  Electric motor generated mechanical power on temperature responses, however are opposite, because while the voltage of the voltage source increases with As the temperature rises, the mechanical power supplied by the electric motor also takes away increasing temperature. But since, as already said, the electrical voltage of the Voltage source for other reasons, such as discharge or damage to the battery, even at high ambient temperatures, for example of a nominal voltage of 12 V. can drop to a voltage of 9 V, the drive must be designed so that it also at this reduced voltage and a high limit temperature of, for example 80 ° C still works perfectly.

On the other hand, this design of the drive has the consequence that when the Nominal voltage of the battery and / or outside temperature below the limit Electric motor delivers a mechanical power that is significantly above the specified one Performance value lies and leads to an accelerated work of the drive. That in turn has a disturbing effect when attacks or the like take effect Noise development. As has been shown, this noise development can also not with sound-absorbing bearings for the shaft of the electric motor and Effectively combat the spindle, as taught in the aforementioned DE 196 37 594 A1.

The invention is therefore based on the object of a generic drive create the one hand up to a predetermined limit of voltage and / or Temperature works properly, on the other hand, with other values, these parameters do not annoying noise.

The achievement of this task consists in the characteristic features of the main claim, an advantageous embodiment of the invention describes the Subclaim.

DE 35 40 686 C2 provides the provision for limiting the wake of a part a mechanical spring-loaded friction brake on the motor shaft is known, the however, produces a constant braking force.

In the invention, excess mechanical power of the electric motor, which is otherwise the cause of disturbing noise development, implemented in friction power, whereby  for this purpose known in an advantageous manner, usually with a silicone-containing Fluid-filled displacement elements can be used.

The displacement element can be at any suitable point in the mechanical energy flow arranged behind the electric motor including its output shaft or be connected.

In the exemplary embodiment of the invention shown in the figures, the displacer element 1 is arranged on the spool 4 of the drive, which is connected to the nut 5 , via the gearwheel 2 on its axis and the toothed rack 3 . This runs on the spindle 6 , which is in mechanical connection with the output shaft of the electric motor 8 via the coupling 7 . In the case of a drive for a central door locking system in a motor vehicle, this electric motor 8 is fed by the vehicle's on-board battery.

At least one wing sits on the shaft of the displacer element 1 , the pivoting movements of which are braked by a fluid with a predetermined viscosity or a predetermined temperature dependence of its viscosity. Based on predetermined limit values of the outside temperature (determines the mechanical power of the electric motor 8 ) and the electrical voltage of the voltage source, for which the drive still has to function properly, the displacement element 1 provides a variable additional braking effect of the electric motor 8 at other parameter values, so that its then Movement is delayed and the occurrence of disturbing noises, for example when attacks are effective.

With the invention, a generic drive is accordingly created, which without Impairment of its functional range in terms of voltage and temperature against the occurrence of disturbing noises is ensured with other parameter values.

Claims (2)

1. Drive, in particular for a door central locking system in a motor vehicle, with an electric motor fed from a voltage source, of which the voltage source has a temperature response of its electrical voltage and / or the electric motor has a temperature response of its mechanical power, characterized in that the drive for a predetermined functionally reliable mechanical power value of the electric motor ( 8 ) is designed for a given limit value of voltage and / or temperature and the electric motor ( 8 ) is assigned a brake ( 1 ) which compensates for increases in power occurring at other voltage and / or temperature values of the electric motor ( 8 ) is designed in relation to the predetermined power value.
2. Drive according to claim 1, characterized in that the brake is formed by at least one fluid-filled displacement element ( 1 ), the braking effect of which is speed and / or temperature dependent.
DE19829823A 1997-07-11 1998-07-03 Actuator drive for motor vehicle central door locking Withdrawn DE19829823A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19729859 1997-07-11
DE19829823A DE19829823A1 (en) 1997-07-11 1998-07-03 Actuator drive for motor vehicle central door locking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19829823A DE19829823A1 (en) 1997-07-11 1998-07-03 Actuator drive for motor vehicle central door locking

Publications (1)

Publication Number Publication Date
DE19829823A1 true DE19829823A1 (en) 1999-01-14

Family

ID=7835470

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19829823A Withdrawn DE19829823A1 (en) 1997-07-11 1998-07-03 Actuator drive for motor vehicle central door locking

Country Status (1)

Country Link
DE (1) DE19829823A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10032664A1 (en) * 2000-07-05 2002-01-24 Daimler Chrysler Ag Locking system for vehicle has locking control unit equipped with at least two different positioning speeds for control of locking adjusting unit
DE202004020261U1 (en) * 2004-12-28 2006-05-11 Brose Schließsysteme GmbH & Co.KG Drive mechanism for adjusting ratchet in motor vehicle, has brake assembly causing deceleration of drive motor for reaching end position of ratchet and blocking device causing blocking of motor during reaching end position of ratchet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10032664A1 (en) * 2000-07-05 2002-01-24 Daimler Chrysler Ag Locking system for vehicle has locking control unit equipped with at least two different positioning speeds for control of locking adjusting unit
DE10032664C2 (en) * 2000-07-05 2003-10-16 Daimler Chrysler Ag Locking system for a vehicle
DE202004020261U1 (en) * 2004-12-28 2006-05-11 Brose Schließsysteme GmbH & Co.KG Drive mechanism for adjusting ratchet in motor vehicle, has brake assembly causing deceleration of drive motor for reaching end position of ratchet and blocking device causing blocking of motor during reaching end position of ratchet

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Legal Events

Date Code Title Description
8120 Willingness to grant licenses paragraph 23
8141 Disposal/no request for examination