Mechanical front wheel drive roller wedging control system
AssigneeDeere & Company
InventorsJeffrey A. Lawrence, Erhardt Wowerat, Robbie B. Quinn, Brian D. Seegert, Eric A. Howard
Life of this patent
Estimating the term…
Abstract
A mechanical front wheel drive roller wedging control system includes a 4WD switch in a vehicle operator station, a roller cage drag mechanism electrically activated by the 4WD switch and providing a drag on a roller cage if the 4WD switch is in an on position, and a throttle pedal switch actuated by the throttle pedal and that deactivates the roller cage drag mechanism when the throttle pedal is released.
Claims8
A mechanical front wheel drive roller wedging control system, comprising:
- a 4WD switch in a vehicle operator station;
- a roller cage drag mechanism electrically activated by the 4WD switch and providing a drag on a roller cage if the 4WD switch is in an on position;
- and
- a throttle pedal switch actuated by the throttle pedal and deactivating the roller cage drag mechanism when the throttle pedal is released.
A mechanical front wheel drive roller wedging control system, comprising:
- a solenoid having a plunger extending to engage an actuating washer to impose a drag on a roller cage having a plurality of rollers that are engageable between a ring gear hub and an output hub of an MFWD system;
- and
- a throttle pedal switch retracting the plunger when a throttle pedal is released before any wedging of the rollers between the ring gear hub and the output hub.
A mechanical front wheel drive roller wedging control system, comprising:
- a roller cage drag mechanism activated by a 4WD switch to drive at least one front wheel if rear wheel slip occurs;
- a throttle pedal switch to deactivate the roller cage drag mechanism when the throttle pedal is released.
Dependencies are inferred from the claim text.