Electricity: motive power systems – Automatic and/or with time-delay means
Reexamination Certificate
2001-06-06
2002-10-29
Masih, Karen (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
C318S434000, C318S455000, C318S443000, C318S466000, C318S468000, C318S469000
Reexamination Certificate
active
06472836
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority of International application number PCT/DE99/02972, filed Sep. 14, 1999, which in turn claims priority to German patent application number 198 45 768.5, filed Sep. 22, 1998.
FIELD OF INVENTION
The invention relates to a method and apparatus for electrically controlling and regulating the movement of an electrically operated aggregate of a motor vehicle, more particularly a window lifter or sliding roof.
BACKGROUND OF INVENTION
From DE 33 03 590 C2 a method is known for electrically operating and monitoring the opening and closing cycle of an electrically operated window lifter in which a state of collision is detected indirectly as a result of a suddenly dropping adjusting speed of the window lifter. As a correlation value for the actual adjustment force of the aggregate, the electric current, the torque or the periodic length of the drive motor of the aggregate is measured. As soon as the adjustment force exceeds the maximum permissible limit value an associated control and regulating electronics emanates from a collision state and causes the drive movement of the window lifter to be switched off or reversed.
DE 40 20 351 A1 describes a method for electronically monitoring the opening and closing cycle of an electrically operated aggregate where an unjustified reversal of the movement of the setting member caused by the action of acceleration forces on the vehicle body is prevented through an additional sensor element which detects the appearance of acceleration forces and sends corresponding signals to a control and regulating electronics unit.
In order to take into consideration the acceleration forces which act on the vehicle body, more particularly to consider the vertical acceleration forces which occur when driving over a stretch of rough road it is further known to undertake temporal filtering of the detected correlation value for undertaken through rough road sensors which consider the detected correlation value over a certain time span, as a rule about 30 milliseconds. With the presence of a stretch of rough road the detected signal fluctuates about a mean value and does not rise permanently as in the case of a jamming situation. By considering the signal over a certain time span it is therefore possible to conclude whether it is merely a question of a rough road stretch or a proper case of jamming.
The drawback with this method is that as a result of the need to consider the detected signal over a certain time span, a jamming situation reversing the adjusting movement of the setting member of the aggregate only follows with a temporal delay. This makes it difficult to meet the stringent safety requirements for the safety of motor vehicle window lifting devices.
Finally, it is known from WO 97/39509 to take into consideration a tacho signal for electronically monitoring an adjustment drive mounted in a vehicle in an arrangement for preparing at least one limit value of a closing force restriction or anti-jamming protection system, and to adjust the limit value of the adjustment force in dependence on the tacho signal.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a method and apparatus for electrically controlling and regulating the movement of an electrically operated aggregate of a motor vehicle. Thus, it possible in any operating state of the motor vehicle, more particularly in the stationary or parking state, to provide the highest possible degree of security for the anti-jamming system to keep the risk of faulty release of the anti-jamming system as low as possible.
By automatically deactivating the rough road filter when the motor vehicle is at a standstill the sensitivity of the anti-jamming protection system is increased and low maximum permissible jamming forces are produced when the vehicle is stationary. The rough road filter of the anti-jamming system normally undertakes a temporal filtering of at least one correlation value for the adjustment force of the aggregate. When the rough road filter is deactivated and the maximum permissible jamming force (which is equal to the limit value of the adjustment force) is exceeded, the adjusting movement is switched off or reversed without any temporal filtering or delay.
The use of a rough road filter for considering a correlation value of the adjusting movement over a certain time span results in jamming, reversing, or switching off the aggregate with a time delay. By switching off the rough road filter when the vehicle is at a standstill this time delay is reduced or eliminated so that the sensitivity of the anti-jamming system is improved.
The invention thus provides for when the vehicle is at a standstill, a situation where children might possibly play unobserved in the vehicle, with maximum sensitivity of the anti jamming protection system. In a preferred embodiment of the invention, the sensitivity of the anti-jamming protection system is maximum when the motor vehicle is at a standstill so that in the event of children playing in a stationary or parked vehicle, the highest level of safety is guaranteed for the anti-jamming protection system.
In a preferred embodiment of the invention, in order to increase the sensitivity of the anti-jamming protection system when the vehicle is stationary, the limit value of the adjustment force is automatically reduced so that the sensitivity of the anti-jamming protection system is increased. The increase in the sensitivity of the anti-jamming system takes place by reducing the limit value of the maximum permissible jamming force which is detected through a correlation value for the adjustment force of the aggregate.
Whether the vehicle is at a standstill can be detected in numerous ways. The stationary or parked state of the motor vehicle can be ascertained through a switched-off ignition, a removed ignition key, the opening of at least one vehicle door, switching off the engine, opening a seat belt of an occupant or by an occupant getting out of the vehicle.
In the case of a motor vehicle with passive-entry/passive-go system, a stationary state of the vehicle is assumed when the identification transmitter is removed from the motor vehicle. In the case of passive-entry/passive-go systems, an identification transmitter is provided with a transponder through which the vehicle automatically recognizes when the vehicle driver is approaching or moving away, and correspondingly, the doors and windows of the motor vehicle become automatically opened or locked. Further applications are thereby possible.
Furthermore, a stationary state of the motor vehicle can be assumed when the engine is running, the brake pedal is activated and/or no gear is engaged. The same applies to the case where the engine is running, the gear is engaged, and a certain engine speed threshold is understepped. The vehicle is, for example, in the waiting position at traffic lights or shortly before starting off. The last two mentioned variations of the invention have the advantage that lowering the sensitivity of the anti-jamming protection according to the invention is also provided when the vehicle is in the standstill phases during a journey.
Furthermore, the vehicle is advantageously assumed to be at a standstill when remote control is activated for closing the aggregate or closing the vehicle doors or if automatic events take place when the ignition is switched off, e.g. controlled by a rain sensor. Thus, it is often standard for both doors of the vehicle to be locked and the windows to be closed through a remote control. Since persons or animals might possibly still be in the vehicle, the maximum sensitivity of the anti-jamming protection is set. The same applies during automatic closing of the windows, possibly initiated by the rain sensor of a cabriolet. With automatic closing of the aggregate or of the vehicle doors through a remote control, or during automatic events with the ignition switched off, the maximum sensitivity of the anti-jamming protection is set since the driver leaving the vehicle mi
Moench Henning
Richter Stefan
Uebelein Joerg
Brose Fahrzeugteile GmbH & Co. KG Coburg
Christie Parker & Hale LLP
Masih Karen
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