DE102009008366B3 - Electromotive locking system with anti-trap protection - Google Patents

Abstract

The invention relates to an electromotive locking system (100), in which, when the starting position of the closing body (2) of the system is in the critical zone upon receipt of a closing instruction, the closing body (2) is first moved a short distance in the direction of its open position, before the movement is reversed to move the closure body (2) to its closed position. In the starting region from reversing the movement of the closing body (2) to reaching the initial starting position, jamming of objects is excluded so that reference values for determining the drive parameters characteristic of the displacement of the closing body (2) are available to the anti-entrapment device of the electromotive locking system (100) are.

Description

The The invention relates to electromotive locking systems and in particular to remote-controlled electromechanical locking systems with integrated anti-trap protection.

in the Automotive engineering find electromotive locking systems among others as electrically actuated Window regulators or sunroof drives use. The electromotive Move locking systems a closure body for Closing an opening. The closing body can doing a tour be moved, which is formed in or at the opening. This meets z. B. on windows in a vehicle window frame are guided, or on sliding roofs guided in a vehicle roof hatch. Of the Closing body can but also to release the opening by tilting or folding be formed, as for example in Hubdach- or Faltdachsystemen the Case is. Of course There are systems where different types of opening or closing movement combined with each other.

Of the Area between the open position of the closing body, in which the maximum possible accessibility the opening is given, and the closed position of the closing body, at the opening either completely closed or locked as far as possible, will as a closing area designated.

To the Avoid personal injury by Pinching of body parts when closing the opening with the closing body are at the electromotive locking systems suitable protection systems provide that stop in the event of danger, the closing or the Reduce the force with which the closing body is moved. In principle, be the protection systems divided into two categories, direct measuring Systems and indirect measuring systems. Direct measuring systems check the presence of objects in the closing area by means of suitable sensors, indirectly measuring systems include the presence of one in the closing area jammed object on the basis of repercussions on the electromotive Drive the locking system.

Directly Measuring systems offer a maximum dimension if suitably designed safety, but are relatively complex and thus also costly in the implementation.

Indirectly By contrast, measuring systems are generally relatively inexpensive. There they usually the for controlling the electromotive drive already existing Sensors are also common No additional Sensors required. A disadvantage of these systems, however, is that is out of retroactivity the movement of a closing body not alone recognize the electric motor drive leaves, whether objects or foreign bodies (so-called clamping body) in the closing area are trapped. This is mainly due to the fact that when moving of the closure body to be applied personnel depend on a variety of factors, many of which are over time or with changing ones Change ambient conditions. For example, you can with the time in the lead of a vehicle window accumulate particles that move the Window in the window frame increasingly difficult. But also others Factors, such as As humidity, very high or very low Temperatures leave you to move or otherwise move the closing body required Force vary from time to time. In addition, the operating parameters change a serving as a drive electric motor with its supply voltage, their value, for example, between 9 V for old, empty vehicle batteries and 16 V when supplied by the alternator of a vehicle can fluctuate.

In many countries There are provisions that prescribe a maximum permissible clamping force, the is to be complied with under all boundary conditions. Especially for the critical Zone at which due to the incomplete coverage of the opening through the Closing body remaining residual opening in the closing direction is less than or equal to a certain value, certain clamping forces must not be exceeded become. In chapter S5 the for The United States of America standard FMVSS118 will be the opening width the critical zone, for example, given 20 mm, and a maximum allowed Clamping force for given this range for a relatively hard specimen of 65 N / mm. For hard clamping bodies is already formed within a very short travels a high clamping force. At a small distance of the clamp body to the closing body or but if the clamp body is already clamped, is the activation of the locking device especially critical.

The highest Safety requirements are for electromotive locking systems to ask if the closure without visual contact of the operator is made, and thus no Control regarding a possible entrapment of foreign objects in the closing area given is. This is especially when activating the locking system via a Radio remote control the case, but also with an automatic activation by closing operations automatic systems, such. B. rain sensors.

The responsibility for avoiding damage is therefore solely the technical issue management of the locking system.

at known electromotive locking systems with indirect anti-trap For the clamping force reduction is a power control of the electromotive Drives used the closing process by means of a pulse width modulated control specifically slowed down in the critical area and the applied by the drive Reduced power. Such a pulse width modulated power control However, the electromotive drive requires additional Components whose use is in need of additional Space and also associated with additional costs.

The publication DE 10 2007 030 656 A1 discloses a method and an adjusting device for detecting a trapping case in the travel of a motor-driven actuating element, in particular a motor vehicle, wherein adjusting the value of a motor load characterizing operating parameter detected, the respective current value of the operating parameter, each with a current travel assigned, predetermined threshold value compared and when the threshold value is exceeded or fallen below by the current value of the operating parameter, the motor is switched off and / or reversibly driven.

outgoing This is the object of the invention, an electromotive locking system indicate that this is a cost effective and still ensures safe anti-trap protection.

The The object is according to the independent claims of Invention solved.

The The invention comprises an electromotive locking system with an electromotive drive for moving a closing body between a first position and a second position, a controllable Switching element, which is the electric motor drive with a power supply connects, a first sensor element for converting the angle of rotation of the electric motor drive in a first electrical measurement, and a controller which is formed, the respective position of the closing body between the first position and the second position using the to determine the first electrical parameter and the switching element in dependence an instruction signal and the particular position of the closing body Taxes. The controller is further adapted to receive upon receipt of a as a closing instruction trained instruction signal for moving the closing body in Direction to the second position and if that on receipt of the closing instruction certain starting position of the closing body relative to the second position falls below a first predetermined distance, the switching element to control in a first switching state, in which the connection of the electromotive drive with the power supply Moving the closing body into Direction of the first position causes the distance of the current Position of the closing body of the To determine the starting position upon receipt of the sealing instruction and when this distance reaches a predetermined second distance or exceeds to control the switching element in a second switching state at the connection of the electromotive drive with the power supply moving the closure body in Direction of the second position causes, while the anti-trap device for continuous monitoring the drive parameter activated.

In In this context, it should be noted that in this Description and claims to the list terms used to describe "comprise", "comprise", "include", "contain" and "with", as well as their grammatical modifications, generally a non-exhaustive list of Characteristics, such. B. process steps, facilities, areas, Sizes and denote the like, in no way the presence of others or additional Excludes features or groupings from other or additional features.

The The invention further comprises a method for controlling an electromotive Drive for moving a closing body of an electromotive locking system between a first position and a second position, with steps for Check the presence of a closure instruction for moving the Closing body in the direction to the second position, check the distance of the initial position of the closing body upon receipt of the closing instruction relative to the second position, controlling the electric motor drive for moving the closing body in Direction to the first position, if the distance is a first predetermined Distance falls below, and controlling the electric motor drive for moving the closing body in Direction to the second position as soon as the distance of the current Position of the closing body for Initial position of the closing body a reaches or exceeds the second predetermined distance, at the same time the anti-pinch device for continuous monitoring of the drive parameters is activated.

The invention enables an indirect anti-pinch detection of foreign bodies clamped in the closing area of an electromotive locking system independently of the displacement force to be applied only for moving the closing body without obstructing foreign bodies. This is achieved by the closing body first from the initial position to a be true amount is moved in the direction of the open position to be able to determine the value of only required to move the closing body displacement force during the subsequent return to the starting position.

The Invention is in their dependent claims further training.

Advantageous becomes the method for controlling an electromotive drive the electromotive locking system then executed, if the closing instruction is transmitted from a radio remote control to the locking system.

According to one another embodiment becomes the method for controlling an electromotive drive the electromotive locking system preferably even then executed if the closing instruction dependent on is generated by sensor signals.

Further Features of the invention will become apparent from the following description inventive embodiments in connection with the claims as well as the figures. The individual features may in one embodiment according to the invention ever for be realized or more than one. In the following explanation some embodiments the invention is referred to the attached figures, of which

1 shows a schematic diagram of an electromotive locking system with a displacement force compensated drive control, and

2 a flowchart showing the essential steps of a method for controlling an electric motor drive for moving a closing body of an electromotive locking system.

In 1 is a schematic diagram of an electromotive locking system 100 represented with a displacement force compensated drive control. The electromotive locking system 100 has an electric motor drive 1 on, the electric motor 1b and a gearbox 1a includes. The gear 1a is used to translate a rotation of the motor 1b in a movement of the closing body 2 , The formation of the closure body 2 as well as the way its through the gear 1a caused movement are determined by specific function and training of the closure body used in each case. Is the closure body 2 For example, designed as a window of a vehicle window, the movement may consist in a displacement of the window within the window frame. The gear 1a is designed in this case as a window. In training the closing body 2 as a sunroof, the movement may consist both in a sliding of the sliding roof towards or relative to a vehicle roof hatch, as well as and possibly additionally in a tilting movement.

In the in 1 Illustrated exemplary embodiment is the engine 1b designed as a DC motor, by applying the from the vehicle battery 4 provided on-board voltage is set in rotation. The respective position of the closing body 2 between the two end positions, ie between the open position, in which the closure object maximally releases the opening covered by it, and the closed position, in which the closure body 2 Closing the opening as far as possible or as far as possible can be done by turning the motor 1b be determined. The motor rotation is via a sensor 5 detected, for example, a Hall sensor, with the rotation angle of the motor 1b can be determined or measured.

The direction of rotation of the motor 1b when transferring the closing body 2 in the closed position is the transfer of the closing body 2 opposed to the open position. Reversing the direction of rotation of the engine is called reversing 1 illustrated exemplary embodiment by reversing the motor 1b supplied voltage reached.

The polarity reversal takes place with the controllable switching element 3 , which can take three switch positions. In a first switching position of the switching element 3 they are the engine 1b leading lines with the in 1 each at the top located connections to the vehicle battery 4 connected. In the second switching position, the switching element connects 3 to the engine 1b leading lines each with the in 1 located below located lines to the vehicle battery 4 , In the in 1 shown third switching position is no electrical connection between the vehicle battery 4 and the engine 1b ,

The control device comprises a (in 1 not shown) anti-pinch device 14 to that of the closing body 2 To limit clamping force exerted on a clamping body to a predetermined maximum value. The determination of the clamping force by the anti-pinch device 14 can on the basis of the drive 1 recorded motor current done. In this case, in the motor circuit, as in the in 1 shown embodiment, a measuring resistor 6 for measuring the engine 1b be included stream included. The of the motor current at the measuring resistor 6 caused voltage drop is then via a voltage measuring device 7 detected. Voltage measuring device 7 and measuring resistor 6 Together they form a current measuring sensor, via the signal line 12 with the control device 10 the electromotive locking system 100 connected is. Notwithstanding the illustrated embodiment, the anti-trap device 14 also based on other methods for indirectly detecting a pinching situation, in particular on those, the drive parameters for the characterization of the drive 1 determine applied force.

The of the rotation angle sensor 5 provided measuring signals are from the controller 10 over the signal line 11 receive. The control of the switching element 3 through the controller 10 via the control line 13 ,

The present invention is based on the recognition that the clamping force with which a foreign body from the closing body 2 in the closing area of the electromotive locking system 100 is clamped, can only be reliably determined when the force required to move the closing body alone is known.

To avoid pinching objects in the critical zone, it is first determined whether the starting position of the closing body 2 located in the critical zone. If this is the case, then the closing body 2 initially moved over a limited range in the open position, which increases the opening. Following this, the direction of movement of the closing body 2 vice versa and the closing body 2 moved back in the direction of the closed position to the starting position. As the closing body 2 previously retracted in the direction of the open position, its movement back to its initial position can not be hindered by foreign matter. In this starting region, starting with the transition into the closing movement until reaching the starting position, no pinching can thus occur. As a result, the anti-pinch device, the operating parameters of the drive 1 or the engine 1b certain, the unimpeded movements of the closing body 2 are assigned. A change in these operating parameters during the further closing operation thus prevents the movement of the closing body from being obstructed 2 and thus close to a pinching process.

In the flow chart of 2 are the essential steps of the control 10 executed method for the above-described displacement force compensated control of the electromotive drive of an in 1 shown electromotive locking system shown.

Upon receipt of a closing order via an in 1 not shown signal line in step S0 checks the control device 10 in step S1 the distance of the current position of the closing body 2 to its closed position. The test is carried out as indicated above preferably via a continuous monitoring of the engine rotation. In the next step S2, it is checked whether the distance determined in step S1 is smaller than a predetermined distance. If the specified distance is not fallen below, then there is the Verschließköper 2 not in the critical zone. In this case, the process proceeds to step S4 and the closure body 2 moved in the direction of its closed position. During this closing operation, the anti-pinch device is active, whereby upon detection of a jamming state, the drive is reversed to the closing body 2 to move a certain amount towards the open position.

However, if it is determined in step S2 that the predetermined distance is undershot, the closing body is thus located in the critical zone, then in step S3 the closing body is first moved by a predetermined amount in the direction of its open position. In other words, that's about the closure body 2 controlled release of the opening enlarged. In the following step S4, the movement of the closing body 2 vice versa, ie the closing body is moved in the direction of its closed position, at the same time the anti-trap device is activated.

The present invention enables the anti-pinch device reliable monitoring of closing operations with the benefits of a high robustness against misreversing while reliable pinching detection especially when the distance between the closing body and the clamp body is very low or even zero.

100

electromotive locking system

1

electromotive drive

1a

electric motor

1b

transmission

2

closing body

3

switching element

4

vehicle battery

5

Rotation angle sensor

6

measuring resistor

7

Voltage measuring device

10

control device

11

signal line

12

signal line

13

control line

14

indirect anti-trapping

S0-S4

steps

Claims (4)

Electromotive locking system with - an electric motor drive ( 1 ) for moving a closing body ( 2 ) between a first position and a second position, - a controllable switching element ( 3 ), which is the electromotive drive ( 1 ) with a power supply ( 4 ), - a first sensor element ( 5 ) for converting the angle of rotation of the electromotive drive into a first electrical measured variable, - a controller ( 10 ), which is formed, the respective position of the closure body ( 2 ) between the first position and the second position using the first electrical measurand and to control the switching element in response to an instruction signal and the particular position of the occlusion body, and - an anti-pinch device adapted to monitor the clamping force exerted by the occlusion body on a clamp body formed by drive parameters, wherein the controller ( 10 ) is further adapted, on receipt of an instruction signal designed as a closing instruction, for moving the closing body ( 2 ) in the direction of the second position and when the starting position of the closing body determined on receipt of the closing instruction falls below a first predetermined distance relative to the second position, - the switching element ( 3 ) in a first switching state, in which the connection of the electromotive drive ( 1 ) with the power supply ( 4 ) causes a movement of the closing body in the direction of the first position, - the distance of the current position of the closing body ( 2 ) from the initial position upon receipt of the closing instruction and, if this distance reaches or exceeds a predetermined second distance, - the switching element ( 3 ) in a second switching state, in which the connection of the electromotive drive ( 1 ) with the power supply, a movement of the closing body ( 2 ) in the direction of the second position, thereby activating the anti-pinch device for continuous monitoring of the drive parameters. Method for controlling an electromotive drive for moving a closing body ( 2 ) of an electromotive locking system ( 100 between a first position and a second position, the method comprising the steps of - checking the presence of a closing instruction for moving the closing body ( 2 ) in the direction of the second position (S0), - checking the distance of the initial position of the closing body ( 2 ) upon receipt of the closing instruction relative to the second position (S1), - controlling the electromotive drive ( 1 ) for moving the closing body ( 2 ) towards the first position, when the distance is less than a first predetermined distance (S2), - controlling the electromotive drive ( 1 ) for moving the closing body ( 2 ) towards the second position when the distance of the current position of the closing body ( 2 ) to the initial position of the closing body ( 2 ) reaches or exceeds a second predetermined distance, and activate a jamming protection device for continuous monitoring of operating parameters of the drive ( 1 ). The method of claim 2, wherein the locking instruction is from a radio remote control to the locking system ( 100 ) is transmitted. A method according to claim 2 or 3, wherein the sealing instruction dependent on is generated by sensor signals.