Gas spring control system and method
First Claim
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1. A controller for adjusting a suspension system for a vehicle, the suspension system having one or more gas springs, comprising:
- a processing circuit configured to receive a measure of gas in the one or more springs;
wherein the processing circuit is further configured to calculate a difference between a target value and a current value based on the received measure of gas;
wherein the processing circuit is configured to provide an output for adjusting the gas in the one or more springs in response to the calculated difference;
wherein the processing circuit is further configured to determine a target pressure value for the one or more springs and a volume estimation for the one or more springs, the processing circuit determining the target pressure value using a ratio of spring pressures; and
wherein the processing circuit is further configured to calculate the difference using the target pressure value and the volume estimation.
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Abstract
A vehicle suspension system includes a pump, a gas spring, and an accumulator. The suspension system also includes a controller for adjusting the suspension system. The controller has a processing circuit configured to receive a measure of gas in the spring. The processing circuit is further configured to calculate a difference between a target value and a current value based on the received measure of gas. The processing circuit is also configured to provide an output for adjusting the gas in the spring in response to the calculated difference.
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Citations
15 Claims
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1. A controller for adjusting a suspension system for a vehicle, the suspension system having one or more gas springs, comprising:
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a processing circuit configured to receive a measure of gas in the one or more springs;
wherein the processing circuit is further configured to calculate a difference between a target value and a current value based on the received measure of gas;wherein the processing circuit is configured to provide an output for adjusting the gas in the one or more springs in response to the calculated difference; wherein the processing circuit is further configured to determine a target pressure value for the one or more springs and a volume estimation for the one or more springs, the processing circuit determining the target pressure value using a ratio of spring pressures; and wherein the processing circuit is further configured to calculate the difference using the target pressure value and the volume estimation. - View Dependent Claims (2, 3, 4, 5)
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6. A method for adjusting the suspension system of a vehicle comprising:
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receiving at a processing circuit a measured pressure value from a pressure sensor in a gas spring assembly; determining a target pressure value using a constraint comprising a ratio of pressure values; determining in a memory a difference value using the measured pressure value and the target pressure value; and adjusting the gas spring assembly to reduce the difference value. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A vehicle suspension system comprising:
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a gas spring; a spring pressure sensor configured to measure the pressure in the gas spring; a spring length sensor configured to determine a length of the gas spring; and a processing circuit configured to receive a current spring pressure value from the spring pressure sensor and to receive a current spring length value from the spring length sensor; wherein the processing circuit is further configured to calculate a current volume value using the spring length sensor, to determine the product of the current volume value and the current spring pressure value, and to calculate a difference value using a target value and the product; wherein the target value comprises the product of a target pressure value and a target volume value; wherein the target pressure value is determined using a constraint comprising a ratio of pressure values; and wherein the processing circuit is further configured to provide an output for adjusting the amount of gas in the spring in response to the calculated difference. - View Dependent Claims (13, 14, 15)
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Specification