Method for controlling the storage pressure in a closed level control system
First Claim
1. A method for controlling the storage pressure of a pressurized air store of a closed level control system for a motor vehicle, the closed level control system holding an air quantity and including a compressor, said pressurized air store which can be filled with air from the atmosphere and which can be discharged to the atmosphere, at least one air spring communicating via said compressor with said pressurized air store so as to permit a transfer of pressurized air from said air spring into said pressurized air store and from said pressurized air store into said air spring, the method comprising the steps of:
- determining said air quantity in said closed level control system;
filling said pressurized air store with air from the atmosphere when said air quantity lies below a lower limit;
discharging said pressurized air store into the atmosphere when said air quantity lies above an upper limit; and
, controlling the storage pressure of said pressurized air store so as to cause said quantity to lie in an operating range between said upper and lower limits after said filling of said pressurized air store or after said discharging of said pressurized air store.
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Accused Products
Abstract
A method for controlling the storage pressure of a pressurized air store (4) of a closed level control system for a motor vehicle includes a compressor (6), a pressurized air store (4) (which can be filled with air from the atmosphere and which can be discharged into the atmosphere) and at least one air spring (2a to 2d). The air springs (2a to 2d) are connected via the compressor (6) to the pressurized air store (4) so that pressurized air from the air springs (2a to 2d) can be transferred into the pressurized air store (4) and can be transferred in the opposite direction. The storage pressure of the pressurized air store (4) is controlled indirectly via the air quantity in the level control system in that this air quantity is determined. The pressurized air store (4) is filled with air from the atmosphere when the air quantity lies below a lower limit and the pressurized air store (4) is discharged into the atmosphere when the air quantity lies above an upper limit. The control is undertaken in such a manner that the air quantity, after filling or discharging, lies in an operating range between the lower and upper limits.
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Citations
10 Claims
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1. A method for controlling the storage pressure of a pressurized air store of a closed level control system for a motor vehicle, the closed level control system holding an air quantity and including a compressor, said pressurized air store which can be filled with air from the atmosphere and which can be discharged to the atmosphere, at least one air spring communicating via said compressor with said pressurized air store so as to permit a transfer of pressurized air from said air spring into said pressurized air store and from said pressurized air store into said air spring, the method comprising the steps of:
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determining said air quantity in said closed level control system;
filling said pressurized air store with air from the atmosphere when said air quantity lies below a lower limit;
discharging said pressurized air store into the atmosphere when said air quantity lies above an upper limit; and
,controlling the storage pressure of said pressurized air store so as to cause said quantity to lie in an operating range between said upper and lower limits after said filling of said pressurized air store or after said discharging of said pressurized air store. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling the storage pressure of a pressurized air store of a closed level control system for a motor vehicle, the closed level control system holding an air quantity and including a compressor, said pressurized air store which can be filled with air from the atmosphere and which can be discharged to the atmosphere, at least one air spring communicating via said compressor with said pressurized air store so as to permit a transfer of pressurized air from said air spring into said pressurized air store and from said pressurized air store into said air spring, the method comprising the steps of:
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determining said air quantity in said closed level control system;
filling said pressurized air store with air from the atmosphere when said air quantity lies below a lower limit;
discharging said pressurized air store into the atmosphere when said air quantity lies above an upper limit; and
,controlling the storage pressure of said pressurized air store so as to cause said quantity to lie in an operating range between said upper and lower limits after said filling of said pressurized air store or after said discharging of said pressurized air store, wherein said pressurized air store is only filled or discharged when the air quantity in the level control system lies outside of the operating range because of large temperature fluctuations.
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10. A method for controlling the storage pressure of a pressurized air store of a closed level control system for a motor vehicle, the closed level control system holding an air quantity and including a compressor, said pressurized air store which can be filled with air from the atmosphere and which can be discharged to the atmosphere, at least one air spring communicating via said compressor with said pressurized air store so as to permit a transfer of pressurized air from said air spring into said pressurized air store and from said pressurized air store into said air spring, the method comprising the steps of:
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determining said air quantity in said closed level control system;
filling said pressurized air store with air from the atmosphere when said air quantity lies below a lower limit;
discharging said pressurized air store into the atmosphere when said air quantity lies above an upper limit; and
,controlling the storage pressure of said pressurized air store so as to cause said quantity to lie in an operating range between said upper and lower limits after said filling of said pressurized air store or after said discharging of said pressurized air store, wherein said pressurized air store communicates with said at least one air spring so as to permit a transfer of pressurized air from said pressurized air store into said at least one air spring and from said at least one air spring into said pressurized air store.
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Specification