Motor vehicle equipped with a pneumatic level control system
First Claim
1. A pneumatic level control system (12) in a motor vehicle (10) having a vehicle battery (44) and a generator (46) supplying the vehicle battery (44), and an electrically operated compressor (18) with an electric motor (16), which compressor is assigned to the level control system (12), the electric motor (16) of the compressor (18) being supplied with power by the vehicle battery (44) and/or the generator (46) only under certain conditions,wherein a controller controls operation of the level control system (12) based on an energy requirement of the level control system (12) for at least one pending operation is estimated in advance, wherein the at least one pending operation is performed by the pneumatic level control system (12) only when the present energy status of the vehicle battery (44) exceeds the energy requirement of the at least one pending operation by at least a first threshold value and a level of the vehicle is adjusted to an intermediate level, lying between a desired set level and the present vehicle level, such that the energy status of the vehicle battery (44) exceeds the first threshold value once the intermediate level has been reached in response to a determination that the at least pending operation exceeds the first threshold value.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a pneumatic level control system equalizer of a motor vehicle equipped with a battery and a generator supplying the battery, as well as a compressor driven by an electric motor and associated with the level control system equalizer, the electric motor of the compressor being only supplied with electric current by the vehicle battery and/or generator in certain conditions. The power requirements of the level control system equalizer can be pre-evaluated for a change of level and/or a filling of the pressure tank to be performed.
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Citations
13 Claims
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1. A pneumatic level control system (12) in a motor vehicle (10) having a vehicle battery (44) and a generator (46) supplying the vehicle battery (44), and an electrically operated compressor (18) with an electric motor (16), which compressor is assigned to the level control system (12), the electric motor (16) of the compressor (18) being supplied with power by the vehicle battery (44) and/or the generator (46) only under certain conditions,
wherein a controller controls operation of the level control system (12) based on an energy requirement of the level control system (12) for at least one pending operation is estimated in advance, wherein the at least one pending operation is performed by the pneumatic level control system (12) only when the present energy status of the vehicle battery (44) exceeds the energy requirement of the at least one pending operation by at least a first threshold value and a level of the vehicle is adjusted to an intermediate level, lying between a desired set level and the present vehicle level, such that the energy status of the vehicle battery (44) exceeds the first threshold value once the intermediate level has been reached in response to a determination that the at least pending operation exceeds the first threshold value.
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9. A pneumatic level control method for a motor vehicle (10) having a vehicle battery (44) and a generator (46) supplying the vehicle battery (44), and an electrically operated compressor (18) with an electric motor (16), which compressor is assigned to the level control system (12), the electric motor (16) of the compressor (18) being supplied with power by the vehicle battery (44) and/or the generator (46) only under certain conditions, the method comprising the steps of
determining in advance an energy requirement of the level control system (12) for at least one pending operation, determining a current energy status of the battery determining a first threshold value for an energy level of the battery, determining the energy status of the battery after performing the at least one pending operation, performing the at least one pending operation by the pneumatic level control system (12) responsive to determining that the energy status after performing the at least one pending operation exceeds the first threshold value; -
setting a second threshold value for the energy level of the battery, which value is greater than the first threshold value responsive to a determination that the energy value after performing the at least one pending operation is below the first threshold value, and restricting the pneumatic level control system (12) to a limited functionality when the energy level of the battery exceeds the first threshold value and is below the second threshold value. - View Dependent Claims (10, 11, 12, 13)
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Specification