Control and diagnostic method for a differential system
AssigneeDana Heavy Vehicle Systems Group, LLC
InventorPerry M. PAIELLI
Life of this patent
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Abstract
Methods and systems for a differential assembly are provided herein. In one example, a method is provided that includes operating a clutch motor coupled to a differential locking clutch to place the differential locking clutch in a locked configuration. The method further includes, after the differential locking clutch is placed in the locked configuration, reducing electric power delivered to the clutch motor at a first rate and increasing the electric power delivered to the clutch motor when it is determined that clutch disengagement is occurring based on outputs from a motor position sensor or outputs from shaft speed sensors coupled to a pair of shafts coupled to the differential locking clutch.
Claims20
A method for an actuation assembly of a differential locking clutch, comprising:
- capturing a first position value of a clutch motor and a second position value of the clutch motor when the differential locking clutch reaches a kiss point and a fully engaged point, respectively;
- and
- triggering a first fault indicator in response to a variance between the first position value and the second position value surpassing a first threshold value, wherein the first fault indicator is indicative of degradation of the differential locking clutch.
A vehicle driveline system, comprising:
- a differential locking clutch configured to selectively inhibit speed differentiation between a first drive axle and a second drive axle;
- an actuation assembly including a clutch motor that is rotationally coupled to an actuator, wherein the actuator is configured to engage and disengage the differential locking clutch;
- and
- a controller including instructions stored in non-transitory memory that when executed, in response to a variance between a first motor position value and a second motor position value surpassing a threshold value, cause the controller to:
- trigger a first fault indicator.
A method for a differential, comprising:
- triggering a first fault indicator in response to a variance between a first position value of a clutch motor and a second position value of the clutch motor surpassing a threshold value, wherein the clutch motor is included in an actuation assembly and coupled to a locking clutch and the first fault indicator is indicative of degradation of the locking clutch;
- and
- triggering a second fault indicator based on a speed of the clutch motor during locking clutch engagement, wherein the second fault indicator is indicative of locking assembly degradation.
Dependencies are inferred from the claim text.