Abstract:
A control strategy for launching a motor vehicle includes using an electric motor to provide high torque at low speeds during synchronization of launch clutches. An internal combustion engine is started and connected with the electric motor to provide additional torque capacity. Selective engagement and disengagement of an engine disconnect clutch prevents the engine start from interfering with the motor vehicle launch.
Abstract:
A method for operating a motor vehicle hybrid powertrain having an engine, a motor-generator and a multi-speed automatically-shiftable transmission, wherein the engine and the motor-generator operate to supply torque to the transmission for driving a vehicle. The method includes modulating the torque supply from the motor-generator to the transmission during a gear shift to minimize a transmission output torque disturbance.
Abstract:
A method of controlling operation of an electric all-wheel drive hybrid vehicle having an engine, automatic transmission, and first and second motor-generators includes driving the vehicle via the second motor-generator. The method also includes determining desired engine speed and transmission gear ratio. The method also includes starting the engine via the first motor-generator and locking up all but one of a plurality of transmission torque transmitting devices required to be engaged for selecting the gear ratio. The method additionally includes modulating engagement of the one remaining torque transmitting device while controlling the engine to generate the desired engine speed. Furthermore, the method includes regulating the engine and the first motor-generator such that their combined torque is approximately zero, locking up the remaining torque transmitting device to select the gear ratio, and controlling the engine to generate desired transmission output torque. A system for controlling such a vehicle is also disclosed.
Abstract:
A hybrid vehicle includes an electric motor with a rotatable rotor. A centrifugally-actuated clutch has a first rotatable member, a second rotatable member, and at least one actuator member attached to the first rotatable member. One of the first rotatable member and the second rotatable member is operatively connected to the wheels. The other of the first rotatable member and the second rotatable member is operatively connected to the rotor. The actuator member is configured to transfer torque between the first rotatable member and the second rotatable member by an amount that decreases due to centrifugal force acting on the actuator member as a rotational speed of the first rotatable member increases. A method of control is also provided.
Abstract:
A transmission includes a first motor/generator having a first rotor that is selectively rotatable about a first axis and a second motor/generator having a second rotor that is selectively rotatable about a second axis. A first planetary gearset and a second planetary gearset each has a respective first planetary member, a respective second planetary member, and a respective third planetary member. One of the members of the first planetary gearset is operatively connected to the first rotor to receive torque therefrom. One of the members of the second planetary gearset is operatively connected to the second rotor to receive torque therefrom.
Abstract:
A hybrid control system for a hybrid electric vehicle (HEV) includes a hybrid control module. The hybrid control module includes a first motor control module that controls output torque of a first motor. A second motor control module controls output torque of a second motor based on a second motor torque request signal. The second motor torque request signal is generated based on a transmission output torque request signal prior to startup of an engine of the HEV. An override module generates a torque override request signal during the startup. The first motor control module controls output torque of the first motor to crank the engine during the startup. The second motor control module adjusts output torque of the second motor based on the torque override request signal and not the transmission output torque request signal during the startup to minimize vehicle jerk during the engine start.
Abstract:
A hybrid vehicle includes an electric motor with a rotatable rotor. A centrifugally-actuated clutch has a first rotatable member, a second rotatable member, and at least one actuator member attached to the first rotatable member. One of the first rotatable member and the second rotatable member is operatively connected to the wheels. The other of the first rotatable member and the second rotatable member is operatively connected to the rotor. The actuator member is configured to transfer torque between the first rotatable member and the second rotatable member by an amount that decreases due to centrifugal force acting on the actuator member as a rotational speed of the first rotatable member increases. A method of control is also provided.
Abstract:
A transmission disconnect clutch assembly and method are provided. The clutch assembly operates to place the transmission in a low-loss state, by decoupling the base transmission from the differential gearing, thereby maximizing fuel economy and increasing efficiency. The transmission disconnect clutch assembly may be a dog clutch assembly, which may include a dog clutch hub, a clutch apply plate, and a synchronizer. When the dog clutch is disengaged the vehicle may operate in EV mode, propelled by an electric motor and rear e-axle. When the dog clutch is engaged the vehicle may operate in hybrid mode, propelled by torque transmitted to a front axle by an engine and the torque transmitted to the rear e-axle by the electric motor. A method for transitioning a vehicle between EV mode and hybrid mode, as well as a method for transitioning a vehicle between hybrid mode and EV mode are also provided.
Abstract:
Disclosed herein is a showcase for displaying an exhibit therein. The showcase includes a first display unit and a second display unit. The first display unit is located on one side of the exhibit, is formed of a transparent touch panel, and displays information about the exhibit thereon. The second display unit is located such that the exhibit can be interposed between the first display unit and the second display unit, is placed opposite the first display unit, and displays an image related to the exhibit.
Abstract:
A method of controlling operation of an electric all-wheel drive hybrid vehicle having an engine, automatic transmission, and first and second motor-generators includes driving the vehicle via the second motor-generator. The method also includes determining desired engine speed and transmission gear ratio. The method also includes starting the engine via the first motor-generator and locking up all but one of a plurality of transmission torque transmitting devices required to be engaged for selecting the gear ratio. The method additionally includes modulating engagement of the one remaining torque transmitting device while controlling the engine to generate the desired engine speed. Furthermore, the method includes regulating the engine and the first motor-generator such that their combined torque is approximately zero, locking up the remaining torque transmitting device to select the gear ratio, and controlling the engine to generate desired transmission output torque. A system for controlling such a vehicle is also disclosed.