Air treatment system and method for securely releasing a parking brake system
First Claim
1. An air treatment system for supplying a commercial vehicle brake system with compressed air, having a compressed air outlet operatively configured to supply compressed air to a parking brake system and to ventilate at least one spring-loaded cylinder of a parking brake of the parking brake system in order to release the parking brake, the system comprising:
- an overflow valve through which the compressed air is supplied to the compressed air outlet;
an electrically actuable solenoid valve operatively configured to shut-off the overflow valve in at least one switching state;
an electrically evaluatable indicator signal, which signal is indicative of a presence of a driver of the commercial vehicle; and
wherein, when the electrically evaluatable indicator signal is absent, the electrically actuable solenoid valve is in the at least one switching state that shuts-off the overflow valve in order to prevent the compressed air from being supplied to the compressed air outlet.
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Accused Products
Abstract
An air treatment system and method are provided for supplying a brake system of a utility vehicle with compressed air. The air treatment system includes a compressed air outlet that is used for feeding a parking brake system, more specifically for ventilating at least one spring-loaded cylinder of a parking brake and thus for releasing the parking brake. An electrically actuated valve, by which the compressed air outlet can be prevented from being supplied with compressed air, is provided, along with an indicator that can be electrically evaluated to determine if a person is present for driving the vehicle. The electrically actuated valve prevents the compressed air outlet from being supplied with compressed air when the indicator is not provided.
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Citations
22 Claims
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1. An air treatment system for supplying a commercial vehicle brake system with compressed air, having a compressed air outlet operatively configured to supply compressed air to a parking brake system and to ventilate at least one spring-loaded cylinder of a parking brake of the parking brake system in order to release the parking brake, the system comprising:
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an overflow valve through which the compressed air is supplied to the compressed air outlet; an electrically actuable solenoid valve operatively configured to shut-off the overflow valve in at least one switching state; an electrically evaluatable indicator signal, which signal is indicative of a presence of a driver of the commercial vehicle; and wherein, when the electrically evaluatable indicator signal is absent, the electrically actuable solenoid valve is in the at least one switching state that shuts-off the overflow valve in order to prevent the compressed air from being supplied to the compressed air outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 22)
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12. A method for controlling at least one spring-loaded cylinder of a parking brake of a commercial vehicle brake system, which commercial vehicle brake system is supplied with compressed air by an air treatment system, the air treatment system having a compressed air outlet supplied with compressed air via an overflow valve and coupled to the spring-loaded cylinder of the parking brake, the commercial vehicle brake system having an electrically actuable solenoid valve operatively coupled with the overflow valve, the method comprising the acts of:
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monitoring for an electrically evaluatable indicator signal that is indicative of a driver being within the commercial vehicle; shutting-off the overflow valve in at least one switching state of the electrically actuable solenoid valve when the electrically evaluatable indicator signal is absent in order to prevent ventilation of the spring-loaded cylinder due to a supply of compressed air to the compressed air outlet. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification