Abstract: Methods and systems are provided for an accessory drive device. In one example, the accessory drive device comprises an input belt coupled to a pulley of a two-speed device and an output pulley coupled to an output belt configured to provide energy to an alternator or a belt integrated starter generator.

Abstract: A one-way clutch, including: a case; a drive plate enclosed by the case and defining openings; a first plate non-rotatably connected to the case and defining a first opening; a rotatable actuator plate; a strut including a central portion, an engagement portion, and a control portion; and a spring. In a locked mode: the spring pivots the engagement portion into an opening of the drive plate, a rotation of the drive plate in a first direction is enabled, and a rotation of the drive plate in a second direction is blocked. To transition from the locked mode to a free-wheel mode, in which the rotation of the drive plate in the second direction is enabled, the actuator plate is rotated by an actuator to contact the control portion and pivot the strut to displace the engagement portion out of the opening of the drive plate.

Abstract: A dual direction, selectable one-way clutch is provided that can be set to be fully free to rotate in both directions, can be fully locked in both directions, and can provide a one-way clutch option in both directions. The actuator to change the clutch state is an electromechanical and only requires power to change a coupling state of the clutch. The clutch is formed by two sets of gear plates and corresponding engagement pawls that are engageable/disengageable in order to provide for the different locked and one-way clutch states. One or more actuator rings are provided to activate or disengage the pawls.

Abstract: Methods and systems are provided for engaging and disengaging an electromagnetic clutch of a two-speed accessory drive of an engine of a vehicle. In one example, a method comprises, responsive to an electrical demand being higher than a threshold electrical demand, operating an electric machine of the vehicle in a motor mode to reduce a speed of a grounding gear of a planetary gear set of a two-speed accessory drive (TSAD) of the vehicle; and engaging an electromagnetic clutch responsive to the speed of the grounding gear reaching a clutch engagement threshold speed.

Abstract: A one-way clutch, including: a case; a drive plate enclosed by the case and defining openings; a first plate non-rotatably connected to the case and defining a first opening; a rotatable actuator plate; a strut including a central portion, an engagement portion, and a control portion; and a spring. In a locked mode: the spring pivots the engagement portion into an opening of the drive plate, a rotation of the drive plate in a first direction is enabled, and a rotation of the drive plate in a second direction is blocked. To transition from the locked mode to a free-wheel mode, in which the rotation of the drive plate in the second direction is enabled, the actuator plate is rotated by an actuator to contact the control portion and pivot the strut to displace the engagement portion out of the opening of the drive plate.

Abstract: A dual direction, selectable one-way clutch is provided that can be set to be fully free to rotate in both directions, can be fully locked in both directions, and can provide a one-way clutch option in both directions. The actuator to change the clutch state is electromechanical and only requires power to change a coupling state of the clutch. The clutch is formed by two sets of struts carried by pocket plates on opposite sides of a center plate that includes spaced apart drive openings, and the struts are engageable/disengageable with the drive openings in order to provide for the different locked and one-way clutch states. One or more actuator rings are provided to activate or disengage the struts.

Abstract: Methods and systems are provided for engaging and disengaging an electromagnetic clutch of a two-speed accessory drive of an engine of a vehicle. In one example, a method comprises, responsive to an electrical demand being higher than a threshold electrical demand, operating an electric machine of the vehicle in a motor mode to reduce a speed of a grounding gear of a planetary gear set of a two-speed accessory drive (TSAD) of the vehicle; and engaging an electromagnetic clutch responsive to the speed of the grounding gear reaching a clutch engagement threshold speed.

Abstract: Methods and systems are provided for an accessory drive device. In one example, the accessory drive device comprises an input belt coupled to a pulley of a two-speed device and an output pulley coupled to an output belt configured to provide energy to an alternator or a belt integrated starter generator.

Abstract: A system and method to provide a desired torque increase from an engine in which some cylinder operate in spark ignition (SI) combustion mode only and some cylinders operate in homogeneous-charge, compression-ignition (HCCI) combustion mode only are disclosed. Such method includes: operating a first portion of engine cylinders in homogeneous charge compression ignition combustion mode while a second portion of engine cylinders are deactivated. The second portion of engine cylinders in spark ignition combustion mode is activated when a torque demand is greater than the first portion of engine cylinders is capable of supplying. Also, the second portion of engine cylinders is activated when a rate of torque demand is greater than the first portion of engine cylinders is capable of supplying.

Abstract: An internal combustion engine is disclosed in which some cylinders are adapted to run in homogeneous-charge compression-ignition (HCCI) combustion mode and at other cylinders are adapted to run in spark-ignition (SI) combustion mode. HCCI cylinders are at least 2 compression ratios higher than SI cylinders. A method for starting such engine is provided in which combustion is initiated in the SI cylinders and no fuel is supplied to HCCI cylinders. In one embodiment, preheating of HCCI cylinders is provided by a heat exchanger disposed in the exhaust of SI cylinders through which intake air to HCCI cylinders passes. Alternatively, preheating of HCCI cylinders is provided by opening an exhaust gas recirculation valve which is disposed in an exhaust gas recirculation duct between an exhaust of the SI cylinders and an intake of HCCI cylinders. When temperature in HCCI cylinders reaches a threshold, combustion in HCCI cylinders is initiated.

Abstract: A method of using a torque converter bypass clutch to launch a vehicle, mitigate transient vibration, and mitigate vehicle natural frequency harshness. The method uses the torque converter when the bypass clutch power capacity is approaching its limit, when the vehicle load is high, or the vehicle is on a grade, where normally the bypass clutch would launch the vehicle.

Abstract: A system and method to provide a desired torque increase from an engine in which some cylinder operate in spark ignition (SI) combustion mode only and some cylinders operate in homogeneous-charge, compression-ignition (HCCI) combustion mode only are disclosed. Such method includes: operating a first portion of engine cylinders in homogeneous charge compression ignition combustion mode while a second portion of engine cylinders are deactivated. The second portion of engine cylinders in spark ignition combustion mode is activated when a torque demand is greater than the first portion of engine cylinders is capable of supplying. Also, the second portion of engine cylinders is activated when a rate of torque demand is greater than the first portion of engine cylinders is capable of supplying.

Abstract: An internal combustion engine is disclosed in which some cylinders are adapted to run in homogeneous-charge compression-ignition (HCCI) combustion mode and at other cylinders are adapted to run in spark-ignition (SI) combustion mode. HCCI cylinders are at least 2 compression ratios higher than SI cylinders. A method for starting such engine is provided in which combustion is initiated in the SI cylinders and no fuel is supplied to HCCI cylinders. In one embodiment, preheating of HCCI cylinders is provided by a heat exchanger disposed in the exhaust of SI cylinders through which intake air to HCCI cylinders passes. Alternatively, preheating of HCCI cylinders is provided by opening an exhaust gas recirculation valve which is disposed in an exhaust gas recirculation duct between an exhaust of the SI cylinders and an intake of HCCI cylinders. When temperature in HCCI cylinders reaches a threshold, combustion in HCCI cylinders is initiated.

Abstract: In an engine in which a first portion of engine cylinders operate in HCCI combustion mode only and a second portion of engine cylinders operate in SI combustion mode only, two EGR ducts and valves are provided: a first EGR duct adapted to provide flow from an exhaust of HCCI engine cylinders to an intake of HCCI cylinders; a first EGR valve disposed in the first EGR duct; a second EGR dust adapted to provide flow from an exhaust of SI cylinders to an intake of HCCI cylinders via a first EGR valve; and a second EGR valve disposed in the second EGR duct. By adjusting the EGR valves, the intake temperature to HCCI cylinders is controlled. During cold start, the second EGR valve is opened to pull SI exhaust through HCCI cylinders for the purpose of preheating HCCI cylinders.

Abstract: In an engine in which a first portion of engine cylinders operate in HCCI combustion mode only and a second portion of engine cylinders operate in SI combustion mode only, two EGR ducts and valves are provided: a first EGR duct adapted to provide flow from an exhaust of HCCI engine cylinders to an intake of HCCI cylinders; a first EGR valve disposed in the first EGR duct; a second EGR duct adapted to provide flow from an exhaust of SI cylinders to an intake of HCCI cylinders via a first EGR valve; and a second EGR valve disposed in the second EGR duct. By adjusting the EGR valves, the intake temperature to HCCI cylinders is controlled. During cold start, the second EGR valve is opened to pull SI exhaust through HCCI cylinders for the purpose of preheating HCCI cylinders.

Abstract: An internal combustion engine is disclosed in which at least one cylinder is adapted to run in homogeneous-charge compression-ignition (HCCI) combustion mode and at least one cylinder is adapted to run in spark-ignition (SI) combustion mode with the HCCI cylinder having a compression ratio at least 2 ratios higher than the SI cylinder. The intakes and exhausts of the HCCI and SI cylinders are separated with a throttle valve disposed in each intake and exhaust aftertreatment devices tailored to each combustion mode disposed in the exhausts.

Abstract: A powertrain for transmitting power in a vehicle includes a prime mover having a relatively slow transient response, and a storage device for storing energy in a predetermined form. A transmission includes an input driveably connected to the prime mover and an output driveably connected to vehicle drive wheels, producing a range of ratios of a speed of the output to a speed of the input that varies from negative to positive and includes zero. An energy conversion device, driveably connected to the prime mover and drive wheels, converts rotational power transmitted to the energy conversion device from the wheels and the prime mover to a form of energy that can be stored in the storage device, and drives the wheels using energy supplied to the energy conversion device from the storage device. A control device alternately transmits energy from the storage device to the energy conversion device, and transmits energy from the energy conversion device to the storage device.