Abstract:
Methods and systems for managing acceleration of a motor vehicle having an automatic transmission by controlling transmission turbine acceleration are provided. A desired transmission turbine acceleration is determined based on vehicle speed, turbine speed, and other information obtained from the vehicle transmission. One or more torque limits are determined as a function of the turbine acceleration. The torque limits are applied to manage acceleration of the vehicle.
Abstract:
An object of the present invention is to prevent lubricant oil of a speed reduction unit from moving to an electric motor side and besides to prevent an eccentric load from acting on bearings supporting an input shaft. In a drive device for an electric vehicle including: a speed reduction unit 12 including an input shaft 13 driven by output of an electric motor 11; a hub unit 15 rotationally driven by an output member 14 of the speed reduction unit 12; and a housing 16 accommodating the electric motor 11 and the speed reduction unit 12, the configuration is made such that a partition 24 for partitioning an accommodation section into respective accommodation spaces of the electric motor 11 and the speed reduction unit 12 is provided in the housing 16, and an oil seal member 36 is placed between a peripheral edge portion of a center hole of the partition 24 and a rotor support member 31 of the electric motor 11.
Abstract:
A power transmission includes first and second clutches for switching a transmission path for a driving force. A work vehicle includes a clutch controlling unit and an engine controlling unit. The clutch controlling unit is configured to determine which of first and second modes the transmission path is switched into based on which of a range of greater than or equal to a mode switching threshold and a range of less than or equal to the mode switching threshold a speed ratio parameter falls into, and is configured to output a clutch command signal for causing one of the first and second clutches to be engaged correspondingly to the determined mode. The engine controlling unit is configured to apply an offset to a rotational speed of an input shaft such that after switching into the determined mode, the speed ratio parameter deviates from the mode switching threshold in the switched mode. A horsepower outputted by the engine is kept unchanged before and after the engine controlling unit applies the offset to the rotational speed of the input shaft.
Abstract:
In a power output apparatus of the invention, a battery 36 is constructed by a lithium ion battery satisfying a first requirement of Sb/Pm2max >0.09 (m 2 /kW) as a relation of a total electrode area Sb of the battery to a rated output (maximum output) Pm2max of a motor MG2 in power operation and a second requirement of Sb/(|Pm1min+Pm2min|) >0.04 (m 2 /kW) as a relation of the total electrode area Sb of the battery to a rated output Pm1min of a motor MG1 in regenerative operation and a rated output Pm2min of the motor MG2 in regenerative operation. The lithium ion battery satisfying the first requirement and the second requirement ensures sufficient exertion of the drive characteristics of the motor MG2 and the power generation characteristics of both the motors MG1 and MG2.
Abstract:
A hybrid vehicle which can determine slope ascending and slope descending without using GPS radio waves. The hybrid vehicle includes a control unit determines a slope ascending state or a slope descending state of the vehicle by making use of an inclination sensor which detects an inclination with respect to a horizontal surface in the running direction of the vehicle or a vehicle drive sensor. Alternatively, the control unit obtains slope ascending information or slope descending information of the road by making use of a driver operation panel or a bus location system. The control unit sets a charge rate target value of an energy storage device based on these slope ascending state, slope ascending information, slope descending state, and slope descending information and controls charging to the energy storage device.
Abstract:
To respond to a request for a rapid start-off when an operation is performed to select transitioning to a travel range from a neutral range. A gear shifting control device is provided with a driving motor-generator (MG); an automatic transmission (3) provided in a drivetrain, which extends to drive wheels (14), and having a P range, an N range, and a D range as selectable range positions; and a gear shifting controller (21) for controlling the gear changing in the automatic transmission (3). In this device for changing gear in an electric vehicle, the gear shifting controller (21) sets the N range of the automatic transmission (3) to be a range over which the driving motor-generator (MG) is not caused to generate torque even when a operation for depressing an accelerator pedal has been performed, and places a coupling clutch (8c) to be engaged in first gear in an engaged state when the N range is selected.