A vehicle control system includes a first error module that determines a first yaw error based on a difference between a yaw rate of the vehicle and a target yaw rate. A second error module determines a second yaw error based on the first yaw error and a target yaw error. A target yaw error module sets the target yaw error based on a skill level of a driver of the vehicle. An adjustment module selectively one of increases and decreases a target adjustment when the second yaw error is greater than a first predetermined threshold. An actuator control module, in response to the increase in the target adjustment, actuates a dynamics actuator of the vehicle.

A vehicle includes an engine, a first motor generator, a second motor generator, a transmission, a differential device, and an electronic control unit. The transmission includes an input shaft, an output shaft, and a clutch. The electronic control unit is configured to detect a rotation speed difference between the input shaft and the output shaft when the clutch is controlled so as to be brought into a power transmission shut-off state. The electronic control unit is configured to, when the rotation speed difference detected by the electronic control unit is smaller than a target rotation speed difference between the input shaft and the output shaft that occurs in a case where the power transmission shut-off state of the clutch is established, suppress cranking of the engine by the first motor generator.

A driving stabilization system for a four-wheel drive vehicle is proposed. This system includes a plurality of axles each comprising both of a driving shaft connected to a front differential or rear differential of the four-wheel drive vehicle and a driven shaft connected to the driving shaft and configured to transmit power of the driving shaft to a wheel, an axle-specific disconnection device for disconnecting a connection between the driving shaft and the driven shaft, an axle-specific attenuation device for attenuating a driving force of the driving shaft, and a control unit for stabilizing vehicle driving by controlling some of the disconnection devices and attenuation devices in a case where vehicle driving stabilization is required.

Disclosed herein are systems, gearing assemblies and methods for controlling a differential rotation rate between shafts of a vehicle using a variable speed motor. An embodiment includes a gearing assembly including a differential configured to engage a first axle shaft, a second axle shaft, and a drive shaft of a vehicle. The gearing assembly further includes a plurality of adjustment gears configured to engage the differential, configured to be driven by a variable speed motor of the vehicle, and configured to controllably alter a rotation of the first axle shaft relative to the second axle shaft based on rotation produced by the variable speed motor. The plurality of adjustment gears includes a subassembly of planetary gears including a planetary gear carrier, a first set of planetary gears coupled to the planetary gear carrier, and a second set of planetary gears coupled to the planetary gear carrier.

A modular rear drive unit for a hybrid vehicle comprises a torque distributing unit, an electric motor-generator, and a gearing arrangement operatively connecting the electric motor-generator with the torque distributing unit. The modular rear drive unit also includes an integrated housing and rear cradle supporting and surrounding the torque distributing unit, the electric motor-generator, and the gearing arrangement. The integrated housing and rear cradle operatively mounts to the vehicle body.

A powertrain includes an engine that has a crankshaft. A first motor-generator is drivingly connected to the crankshaft via an endless rotatable device. The powertrain includes a transmission that has a transmission input member driven by the crankshaft and a transmission output member. A front differential is operatively connected with front half shafts. A transfer case is configured to distribute torque of the transmission output member to the front differential and to a driveshaft. A rear differential is configured to transfer torque from the driveshaft to rear half shafts. A second motor-generator is drivingly connected to the rear differential. A gearing arrangement is configured to multiply torque from the second motor-generator to the rear half shafts. A controller controls the second motor-generator to function as a motor that provides torque to the rear wheels through the rear differential. A modular rear drive unit operatively connects to the vehicle body.

Disclosed herein are systems, gearing assemblies and methods for controlling a differential rotation rate between shafts of a vehicle using a variable speed motor. An embodiment includes a gearing assembly including a differential configured to engage a first axle shaft, a second axle shaft, and a drive shaft of a vehicle. The gearing assembly further includes a plurality of adjustment gears configured to engage the differential, configured to be driven by a variable speed motor of the vehicle, and configured to controllably alter a rotation of the first axle shaft relative to the second axle shaft based on rotation produced by the variable speed motor. The plurality of adjustment gears includes a subassembly of planetary gears including a planetary gear carrier, a first set of planetary gears coupled to the planetary gear carrier, and a second set of planetary gears coupled to the planetary gear carrier.

A driving force control system for a vehicle is provided to control an output torque of a prime mover and a torque split ratio to right and left wheels to improve stability of the vehicle. A controller is calculates target torques delivered to the right wheel and the left wheel based on a required drive torque and data relating to an attitude of the vehicle, and corrects the target torques based on slip ratios of the wheels. The drive motor is control based on a first current value calculated based on a total torque of the corrected target torques to be delivered the wheels, and the differential motor is controlled based on a second current value calculated based on a difference between the corrected target torques to be delivered to the wheels.

A hybrid car includes an engine, a first motor, a first driving shaft connected to a first drive wheel, a planetary gear, a second motor, a battery, and an electronic control unit. The electronic control unit is configured to control the first motor and the second motor such that the hybrid car travels within a range of allowable input and output electric power of the battery. The electronic control unit is configured to set an upper limit driving force based on a balancing driving force commensurate with a dynamic frictional force between the first drive wheel and a road surface and control the engine, the first motor, and the second motor when an idling-slip of the drive wheel occurs such that a driving force equal to or less than the upper limit driving force is output to the first drive wheel.

The invention relates to switching between 2WD and 4WD of a vehicle. It is suggested to increase output power of an engine (106) when changing to 4WD. An AWD coupling (120) is opened, if not already open. To provide 4WD, a PTU clutch (108) is engaged once engine power has increased. The other couplers are sequentially engaged.