Compressed-air braking system for a tractor vehicle
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United States of America Patent
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Issued Date -
Sep 28, 2023
app pub date -
Jun 2, 2023
filing date -
Dec 9, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A compressed-air braking system of a tractor vehicle includes two service-brake circuits and a parking-brake circuit. A trailer control valve has a control input connected to a brake control line connected to a brake line of one of the service-brake circuits and an inverted control input connected to a further brake control line routed to a brake line of the parking-brake circuit. A valve device for braking a coupled trailer vehicle independently of the foot-brake valve has an electronically controllable valve unit arranged in the further brake control line routed to the inverted control input of the trailer control valve. Via the valve unit, the portion of the further brake control line on the trailer control-valve side can be connected alternately to the portion on the parking-brake valve side or to a depressurizing output.
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