Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1998-12-01
2000-07-04
Paladini, Albert W.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
73484, 180336, 340456, B60L 100
Patent
active
060843152
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a system for operating a control apparatus in a motor vehicle.
BACKGROUND OF THE INVENTION
In vehicles having automatic transmissions, it is known, for example, to provide a selection lever (positions P, R, N, D, 3, 2, 1) which is actuable by the driver of the vehicle. Specific operating states of the transmission can be inputted with the activation of the selection lever. These operating states can, for example, affect the selection of specific transmission gears or the adjustment of a latching of the transmission (park mode). For vehicles having an electronic control apparatus of the automatic transmission, the premise is provided to replace the above-mentioned selection lever with a multi-poled electric switch and to realize the functions of the selection lever/selection switch electromechanically, for example, by an electric motor. The multi-poled electric switch can, for example, be on the steering column and is referred to hereinafter as a selection switch. The functions of the selection lever/selection switch were previously realized mechanically.
In motor vehicles, it is conventional to provide a driving or ignition switch which is actuated by the driver to start or switch off the vehicle. One refers to a switched-in or switched-off ignition. For a switched-off ignition, the above-mentioned electronic control apparatus of the automatic transmission is generally no longer supplied with current/voltage. If the driver now actuates the selection lever with the ignition switched off, then the position of the switch and the functions, which are to be initiated via the control apparatus, are no longer coincidental. This can, for example, lead to a dangerous situation when the driver only switches the selection switch into the position "P" (park) after switching off the ignition and then relies on the braking action/latching of the transmission. Similar effects are conceivable for so-called automated manual-shift transmissions. Here, conventional or modified manual transmissions are considered wherein the clutch pedal and shift lever or only one of these are replaced with an electromechanical drive.
A standard solution for the above-mentioned problem would be to leave the control apparatus permanently connected to the vehicle battery even when the ignition is switched off. This is disadvantageous because of the high current draw of such a system which can lead to a discharge of the battery, especially when the vehicle is at standstill for a long time.
SUMMARY OF THE INVENTION
The object of the present invention is to achieve a high operational reliability of a control apparatus without excessive energy consumption.
ADVANTAGES OF THE INVENTION
As already mentioned, the invention relates to a system for operating a control apparatus in a motor vehicle. Here, at least one input signal is applied to the control apparatus. The essence of the invention is that means are provided with which the control apparatus is activated in response to a change of the input signal. With the means according to the invention, the control apparatus can respond correspondingly anytime to a change of the input signal.
In an especially advantageous configuration, the means of the invention exhibit a lesser internal current draw than the activated control apparatus. With the invention, a high operational reliability of the control apparatus is achieved without an excessive consumption of energy because the means of the invention exhibit only a slight internal current draw and the control apparatus with the higher internal current draw is activated only when required (change of the input signal). For this purpose, it can be especially provided that the means exhibit a detection circuit, which is configured to be especially high resistive and/or switch means.
To have reduced internal current draw, it can be provided that a first energy supply device exhibits a lower internal current draw to satisfy the energy supply of the means according to the invention than the second energy
REFERENCES:
patent: 3742447 (1973-06-01), Sognefest et al.
patent: 3746876 (1973-07-01), Darrow
patent: 4884057 (1989-11-01), Leorat
patent: 5117710 (1992-06-01), Hiroyuki et al.
patent: 5572098 (1996-11-01), Dreon et al.
patent: 5886419 (1999-03-01), Saito et al.
Ottesen Walter
Paladini Albert W.
Robert & Bosch GmbH
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