DE10239383A1 - Circuit arrangement for detecting vehicle door position has first switching device in parallel with second/third switching device series circuit, device that taps first device and series circuit - Google Patents

Abstract

The circuit arrangement has 3 devices in or on the door or door frame from which switching signals can be received when the vehicle door is fully open or closed in the error-free state and a tapping device for electrically tapping at least one of the devices. The first device is connected in parallel with a series circuit of the second and third devices. The tapping device taps the first switching device and the series circuit. The circuit arrangement has first, second and third switching devices (1-3) arranged in or on the door or door frame of the vehicle and from which a switching signal can be received when the vehicle door is fully open or closed in the error-free state and a tapping device for electrically tapping at least one of the switching devices. The first switching device is connected in parallel with a series circuit of the second and third switching devices and the tapping device taps the first switching device and the series circuit of the second and third switching devices. AN Independent claim is also included for the following: (a) an on-board vehicle electrical system with an inventive circuit arrangement integrated in the form of a 4-pole.

Description

The present invention relates to a circuit arrangement for recognizing the position of a door Motor vehicle with a first, second and third switching device, the in or on the door or the door frame of the motor vehicle are arranged and of which in error-free Condition with a full opening and / or closing process the door a switching signal can be obtained, and a tapping device for electrical tapping of the first, second and third switching device. In particular, the present invention relates to a circuit arrangement for precise detection of the position of a sliding door.

An open sliding door can only be electrical permanently connected to the vehicle electrical system through a great deal of effort become. This can be done, for example, with a trailing cable the sliding door and is connected to the motor vehicle frame. Because such Trailing cables, however, are exposed to very high mechanical loads accordingly, it is used rarely. This can be used if necessary existing vehicle control unit the position of the sliding door is not always assign clearly.

For a sliding door For example, three different positions are predefined. To the the sliding door can be one are in an open or semi-open position. On the other hand, the sliding door also completely be closed. About that is usually one Preliminary locking position defined in which the door is already in the lock intervenes but the door not yet complete closed is.

When the sliding door is closed, the Connection between the sliding door and the electrical system produced by a contact module. Likewise, the closed state of the sliding door usually through a door contact, which is designed as a pressure switch is signaled to the vehicle electrical system. This switch is in the Usually arranged in a place where there is heavy contamination exposed and increases the risk of failure. Furthermore is such a pressure switch especially with regard to the switching position with big Tolerances. For example, the pressure switch not when the door is closed pressed sufficiently is and thus remains electrically conductive. It can also happen that the switch is pressed when the door is closed and thus electrically open is temporarily closed when the motor vehicle vibrates and, for example, a flickering of the interior lighting causes.

The lock switch is ultimately used to recognize if the door completely invaded the castle is. Its signal can be used, for example, to control a central locking system or an anti-theft alarm system.

The position of the sliding door can be changed a vehicle control unit can only be recognized if the contact from the door to the door frame via the Contact module is made. If the contact through the contact module is manufactured in the pre-locked position, the vehicle control unit cannot recognize whether the sliding door in the pre-locked position or in the closed state. If the contact through the contact module has not yet been established and the sliding door on the way from a completely open Position moved to the closed position, the vehicle control unit can the closed state the sliding door also do not notice. For the correct operation of an anti-theft alarm system or central locking however, it is necessary to check the closed state of the sliding door respectively every other door to be able to clearly determine.

The object of the present invention is therefore the position of a door, for example, for a vehicle control unit to be able to record.

According to the invention, this object is achieved by a circuit arrangement for obtaining a position signal Door one Motor vehicle with a first, second and third switching device, those in or on the door or the door frame of the motor vehicle are arranged and of which in error-free Condition with a full opening or closing process the door a switching signal can be obtained, and a tapping device for electrical tapping of at least one of the switching devices, the first switching device parallel to a series connection is switched by the second and third switching device and the tapping device, the first switching device and the series connection taps from the second and third switching device.

The first shaft device preferably comprises a door contact switch for switching the interior lighting of the motor vehicle based on the position the door. The second switching device can be a contact module for connecting electronic components the door to an electrical system of the motor vehicle. Furthermore, the third switching device dependent on a lock switch for generating a switching signal of whether the door has fallen into a lock of the motor vehicle exist. In order to the present invention can be implemented with switches which are usually already present in the motor vehicle.

Further advantageous configurations the circuit arrangement according to the invention result from the subclaims.

The invention is now based on the attached Drawings closer explains in which show:

1 a representation of the switches used based on the position of the sliding door; and

2 a voltage-path diagram for the circuit arrangement according to the invention.

The exemplary embodiment described below represents a preferred embodiment of the present invention. A door contact switch 1 is parallel to a series connection of a contact module 2 and a lock switch 3 connected. On each side of the door contact switch 1 a signal line S1 or S2 is provided. Likewise, on each side of the lock switch 3 a signal line S3 or S4 is provided.

If the sliding door (ST) according to the top picture of 1 is open, the door contact switch 1 not pressed and thus electrically conductive. Via the contact module 2 there is no contact from the door to the door frame. The lock switch 3 is electrically closed because the door has not slid into the lock. In this case it flows from the signal line 1 to the signal line 2 via the door contact switch 1 a stream. For the resistance-free system, this means that the two signal lines S1 and S2 are at the same voltage level. The signal line S3 is via the door contact switch 1 and the lock switch 3 connected to the signal line S1.

In the middle of 1 the case is shown that the sliding door (ST) is in a pre-locking position, ie is not completely closed. The door contact switch 1 is already pressed in this case so that it is electrically open. In the pre-locking position, the contact pins of the contact module already have contact with the corresponding contact surfaces, so that this acts as a switch 2 Representable contact module is closed and therefore conductive. The lock switch 3 is still closed in the pre-locked position, as the door has not yet completely fallen into the lock. Consequently, in the pre-locking position, a current flows from the signal line S1 via the contact module 2 and the lock switch 3 to signal line S2 or S4. This means that in this and in the previous case, all signal lines S1 to S4 are at the same voltage level.

If the sliding door is now completely closed, the door contact switch also remains 1 pressed and thus electrically open. The contact via the contact module also remains 2 consist. The lock switch 3 however, now that the door has completely slid into the lock, the door is opened. Thus flows from the signal line 1 to the signal line 2 no more current, or the signal lines S1 and S2 are at a different voltage level, depending on which electrical shading and evaluation is selected. The signal lines S3 and S4 are now also electrically isolated.

The individual branches of the basic circuit arrangement of 1 can be fitted with electrical components in a suitable manner in order to obtain special signals for signal processing. Known devices can be used for signal evaluation.

2 now represents a voltage-path diagram for the individual switches and the signal line S1 or S2. For the switches 1 . 2 . 3 the voltage level at the output of the switch is shown when the level is "High" (Hi). The desk 1 is closed when the sliding door is open, so that the Hi level is present at its output. The switch is in the pre-locked position 1 opened so that the output level drops to "Low" (Lo). The switch is when the sliding door is closed 1 also open, so that the output level Lo remains on the switch 1 is applied.

The desk 2 or the contact module is open when the sliding door is open, so that its output level is initially Lo. Shortly before the sliding door reaches the locking position, the contact in the contact module 2 made so that its output level rises to Hi. When the sliding door is closed, the contact of the contact module is maintained, so that its output level also remains high.

The lock switch 3 is closed in the open state of the sliding door, whereby the level Hi is set at its output. The lock switch is also in the forward position of the sliding door 3 still closed and Hi is still present at its output. As soon as the sliding door is closed, the lock switch opens 3 which drops the output level to Lo.

When the sliding door is closed, the door contact switch opens 1 before the contact module 2 closes. This offset is necessary so that the system does not get into an undefined state when switching.

The lowest voltage curve in 2 shows the voltage on the signal line S1 when the level Hi is applied to S2 or vice versa. The level of S1 drops to Lo when the sliding door is fully closed. The position of the sliding door can thus be clearly determined. Combinations of the signal lines can also be used for evaluation.

1

door contact

2

contact module

3

lock switch

S1 to S4

signal lines

Claims (8)

Circuit arrangement for obtaining a position signal of a door of a motor vehicle with a first ( 1 ), second ( 2 ) and third switching device ( 3 ) which are arranged in or on the door or the door frame of the motor vehicle and from which a switch signal can be obtained in the fault-free state when the door is completely opened or closed, and a tapping device for electrically tapping at least one of the switching devices ( 1 . 2 . 3 ) characterized in that the first switching device ( 1 ) in parallel to a series connection of the second ( 2 ) and third switching device ( 3 ) is switched and the tapping device is the first switching device ( 1 ) and the series connection of the second and third switching device ( 2 . 3 ) taps. Circuit arrangement according to claim 1, wherein the first switching device ( 1 ) includes a door contact switch for switching the interior lighting of the motor vehicle based on the position of the door. Circuit arrangement according to claim 1 or 2, wherein the second switching device ( 2 ) comprises a contact module for connecting electronic components of the door to an electrical system of the motor vehicle. Circuit arrangement according to one of claims 1 to 3, wherein the third switching device ( 3 ) includes a lock switch for generating a switching signal depending on whether the door has fallen into a lock of the motor vehicle. Circuit arrangement according to one of claims 1 to 4, wherein the tapping device and / or the third switching device ( 3 ) evaluation electronics or a consumer is connected. Circuit arrangement according to one of claims 1 to 5, wherein the first and second switching device ( 1 . 2 ) can be switched in a pre-locked position of the door. Circuit arrangement according to one of claims 1 to 6, wherein the third circuit device ( 3 ) can be switched when the door is in the immediate vicinity of the fully closed state. Vehicle electrical system in which a circuit arrangement according to one of claims 1 to 7 is integrated as a four-pole.