Abstract:
A hybrid powertrain has an engine, an input member, an output member, and a stationary member, and includes a single planetary gear set having a first, a second, and a third member. The input member is connected for common rotation with the engine and the output member is connected for common rotation with the second member. A single motor/generator is continuously connected for common rotation with the third member. A starter motor is operatively connected to the engine for starting the engine. A first torque-transmitting mechanism is selectively engagable to connect the input member for rotation with the first member. A second torque-transmitting mechanism is selectively engagable to ground the first member to the stationary member. A third torque-transmitting mechanism is selectively engagable to ground the third member to the stationary member. The powertrain is operable in an electric-only operating mode, an engine-only operating mode, and an electrically-variable operating mode.
Abstract:
A method for controlling shifting between a plurality of operating modes in a hybrid vehicle includes the steps of obtaining a plurality of throttle position values, generating a comparison between a first throttle position value of the plurality of throttle position values and a second throttle position value of the plurality of throttle position values, and selectively allowing a shift between at least two of the plurality of operating modes, based at least in part on the comparison between the first and second throttle position values.
Abstract:
A hybrid powertrain has an engine, an input member, an output member, and a stationary member, and includes a single planetary gear set having a first, a second, and a third member. The input member is connected for common rotation with the engine. The output member is connected for common rotation with the second member. A first and a second motor/generator are provided, as well as five torque-transmitting mechanisms, including only one brake. The torque-transmitting mechanisms are engagable in different combinations to establish at least two electric-only operating mode, at least two engine-only operating mode, and at least three electrically-variable operating modes. In one embodiment, an electric torque converter operating mode is provided, and may be the default mode in case of motor/generator failure.
Abstract:
A hybrid powertrain has an engine, an input member, an output member, and a stationary member, and includes a single planetary gear set having a first, a second, and a third member. The input member is connected for common rotation with the engine and the output member is connected for common rotation with the second member. A single motor/generator is continuously connected for common rotation with the third member. A starter motor is operatively connected to the engine for starting the engine. A first torque-transmitting mechanism is selectively engagable to connect the input member for rotation with the first member. A second torque-transmitting mechanism is selectively engagable to ground the first member to the stationary member. A third torque-transmitting mechanism is selectively engagable to ground the third member to the stationary member. The powertrain is operable in an electric-only operating mode, an engine-only operating mode, and an electrically-variable operating mode.
Abstract:
A hybrid powertrain has an engine, an input member, an output member, and a stationary member, and includes a single planetary gear set having a first, a second, and a third member. The input member is connected for common rotation with the engine. The output member is connected for common rotation with the second member. A first and a second motor/generator are provided, as well as five torque-transmitting mechanisms, including only one brake. The torque-transmitting mechanisms are engagable in different combinations to establish at least two electric-only operating mode, at least two engine-only operating mode, and at least three electrically-variable operating modes. In one embodiment, an electric torque converter operating mode is provided, and may be the default mode in case of motor/generator failure.