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US 2025/0092889 A1Published application
Systems and methods for clutch valve cleaning
AssigneeDana Automotive Systems Group, LLC
InventorsAaron SHORT, Richard BARNBROOK, Daniel HYETT
Life of this patent
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Abstract
Methods and systems are provided for cleaning a clutch valve of a closed clutch. In one example, a method comprising sending a valve cleaning control pulse to a valve in response to a clutch persisting in an engaged position and a clutch pressure demand within a threshold pressure range; and discontinuing the valve cleaning control pulse in response to detecting at least one exit condition.
Claims20
A method, comprising:
- sending a valve cleaning control pulse to a valve in response to a clutch persisting in an engaged position and a clutch pressure demand within a threshold pressure range;
- and
- discontinuing the valve cleaning control pulse in response to detecting at least one exit condition.
A system, comprising:
- a transmission configured to rotationally couple a prime mover to a drive shaft;
- a first input shaft coupled to the transmission;
- a second input shaft coupled to the transmission;
- a dual-clutch assembly comprising a first clutch mechanism and a second clutch mechanism, the first clutch mechanism and the second clutch mechanism selectively coupling one of the first input shaft and the second input shaft, respectively, to the prime mover in response to a clutch pressure demand;
- a valve configured to control a flow of hydraulic fluid to the dual-clutch assembly;
- and
- a controller including non-transitory instructions stored in memory executable to:
- send a valve cleaning control pulse to the valve in response to detection of one of the first clutch mechanism and the second clutch mechanism persisting in an engaged position for a first threshold duration and the clutch pressure demand within a threshold pressure range;
- and
- discontinue the valve cleaning control pulse in response to detection of at least one exit condition.
7 more elements
A method, comprising:
- executing a closed clutch cleaning operation in response to clutch engagement in lockup torque control exceeding a first threshold duration and a clutch pressure demand within a threshold pressure range comprising sending a valve cleaning control pulse to a valve;
- discontinuing the closed clutch cleaning operation in response to detecting at least one exit condition;
- and
- setting a delay timer in response to the valve cleaning control pulse exceeding a second threshold duration.
1 more element
Dependencies are inferred from the claim text.