A power split hybrid powertrain includes an electrically actuated brake that selectively engages a ring gear attached to a flywheel. The ring gear may be, for example, a starter ring gear. Engagement of the brake while the engine is stopped permits use of both electric machines to provide torque to vehicle wheels, thereby increasing the electric torque capacity of the powertrain. The brake is mounted for movement relative to the ring gear, and a mechanical linkage is attached to the brake. In the event of a malfunction of the brake that prevents normal operation of the powertrain, the linkage is manually actuatable by a vehicle operator to move the brake to an override position wherein it cannot engage the ring gear.
Hybrid Vehicle Engine Brake with Manual Override
2020-10-15
Patent
Electronic Resource
English