摘要:
A powertrain operable in input-split, output-split and compound-split operating modes includes a first motor/generator continuously connected with a first member of a first planetary gear set. A second motor/generator is continuously connected with a first member of a second planetary gear set. An input member is continuously connected with a second member of the first planetary gear set. An output member is continuously connected with a second member of the second planetary gear set. A first brake grounds a third member of the first planetary gear set. A second brake grounds a third member of the second planetary gear. A first clutch connects the third member of the first planetary gear set with the second member of the second planetary gear set. A second clutch connects the second member of the first planetary gear set with the third member of the second planetary gear set.
摘要:
A device for selectively controlling and varying a frictional force level at an interface between two bodies, includes a first contact body having at least one surface, a second contact body having at least one surface in physical communication with the first contact body, and an active material in operative communication with a selected one or both of the first contact body and the second contact body, wherein the active material is configured to undergo a change in a property upon receipt of an activation signal wherein the change in a property is effective to change the frictional force level at the interface between the at least one surface of the first contact body and the at least one surface of the second contact body.
摘要:
A hybrid powertrain system includes an internal combustion engine, an electric machine coupled to a transmission, a fluid coupling including an impeller and a turbine wherein the impeller is mechanically coupled to a rotatable member of the electric machine and the turbine is mechanically coupled to a rotatable member of the internal combustion engine. The fluid coupling is effective to fluidically couple torque from the electric machine to the internal combustion engine when the impeller and turbine are not mechanically locked.
摘要:
An apparatus transmitting torque among a first torque generative device, a second torque generative device and an output member includes a first planetary gear set including respective first, second and third members, a second planetary gear set including respective first, second and third members, the respective first member of the second planetary gear set mechanically coupled to the respective first member of the first planetary gear set. The first torque generative device is mechanically coupled to the respective second member of the first planetary gear set. The second torque generative device is mechanically coupled to the respective second member of the second planetary gear set, wherein the second torque generative device includes a grounding state wherein rotation of the respective second member of the second planetary gear set is prevented and a rotational state wherein rotation of the respective second member of the second planetary gear set is not prevented.
摘要:
A powertrain includes an electric motor providing propulsion torque to a transmission input shaft, an internal combustion engine, and an engine disconnect clutch selectively providing torque transfer between the engine and the motor. A method to control a flying engine start in the powertrain includes monitoring an output torque request, determining the propulsion torque to the transmission input shaft based upon the output torque request, determining a compensation torque to be provided to the engine disconnect clutch for the flying engine start, and controlling the motor to provide a motor torque based upon a sum of the propulsion torque and the compensation torque.
摘要:
A servo system includes pressurized fluid, and one or more fluid control devices (FCD) such as a valve or actuator, with at least one FCD having an element with a variable property that varies in response to a stimulus. The FCD controls a flow rate or pressure transmission of the fluid within the servo system. The element may include an active return spring having a variable stiffness. The servo system may operate as an interlock system for a transmission. A method for moving an output load using a servo system includes providing a first FCD with an active element, connecting an output load to a second FCD, activating the active element with a stimulus to vary a property of the active element, transmitting a force from the pressurized fluid to the second FCD, and moving the output load from a first position to a second position in response to the force.
摘要:
An active engine mount assembly for counteracting resultant forces in active fuel management systems, wherein resultant forces are transmitted to a frame of a motorized vehicle generated by the deactivation of at least one cylinder in an internal combustion engine. The active engine mount assembly is fluidly connected to a hydraulic circuit. The hydraulic circuit is operatively connected to an engine crankshaft and operable to actively generate pressure pulses having frequencies self-synchronized with the rotational speed of the crankshaft.
摘要:
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third (and possibly fourth) differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, five, six or seven selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to six mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
摘要:
A hybrid powertrain includes a hybrid electromechanical transmission and a power source. A planetary gear set having a first, a second, and a third member connects the power source with a first and a second motor/generator. A battery is operatively connected to the motor/generators for receiving power therefrom and delivering power thereto. An input member rotates with the first member, the first motor/generator rotates with the second member, and the second motor/generator rotates with the output member. A first torque-transmitting mechanism is engagable to connect the second motor/generator for rotation with the third member. The battery and the second motor/generator provide an electric-only operating mode to power the output member when the first torque-transmitting mechanism is not engaged; the power source, planetary gear set and first motor/generator thereby being disconnected from the output member during the electric-only operating mode to prevent parasitic drag.
摘要:
An electrically variable transmission family is provided which has low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to six selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and at least four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.