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US 6,685,591 B2Granted
Driving apparatus for a vehicle
AssigneeHitachi, Ltd.
InventorsTomoyuki Hanyu, Masahiko Amano, Masahiko Ibamoto, Toshimichi Minowa, Yasuo Morooka
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AssigneeHitachi, Ltd.
InventorsTomoyuki Hanyu, Masahiko Amano, Masahiko Ibamoto, Toshimichi Minowa, Yasuo Morooka
Estimating the term…
The present invention provides a driving apparatus for a vehicle comprising an engine for providing a primary driving force to a driving shaft and an auxiliary power plant connected with the engine through a transmission the transmission comprising an input shaft for inputting the primary driving force from the engine and an output shaft connected to the input shaft for transmitting the primary driving force to the driving shaft wherein the auxiliary power plant provides a secondary driving force to the driving shaft during a shifting in speed.
A driving apparatus for a vehicle, comprising:
A driving apparatus for a vehicle, comprising:
A driving apparatus for a vehicle, comprising:
A driving apparatus for a vehicle, comprising:
A driving apparatus for a vehicle comprising:
A method of driving a vehicle, comprising:
A method of driving a vehicle, comprising:
A vehicle comprising a driving apparatus which includes:
A vehicle comprising a driving apparatus which includes:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Control systems specially adapted for hybrid vehicles: control strategies involving selection of transmission gear ratio
Characterised by apparatus, components or means specially adapted for HEVs: characterised by the transmission gearings
Characterised by the transmission gearings: with the gears having orbital motion
Characterised by apparatus, components or means specially adapted for HEVs: characterised by the driveline clutches
Term ended 11 Jan 2022 (estimated)
The present invention relates to a driving apparatus for a vehicle comprising an internal combustion engine, an auxiliary power plant and a differential mechanism and a vehicle using the same.
An automobile transmission includes a synchronous type using a meshing gear as in a manually-operated transmission and a planet type using a planetary gear as in an automatic transmission. The synchronous type is necessary to temporarily interrupt the transmission of an engine driving force when changing speed due to the characteristics of the meshing gear. Therefore, a torque shortage occurs caused by interruption of a driving force. Conventionally, for controlling this torque shortage, an auxiliary power plant (or motor generator “M/G”) is utilized to compensate for the interruption of the driving force. But, since the torque interruption is compensated for by the M/G, the sum total of the output of the M/G that is required is equal to that of the engine, making it difficult to realize the loading properties of the system without having a costly and large M/G. Further, since the M/G arranged within the transmission has a gear ratio that is always higher than the engine speed, the cooperation loss increases when running at high speeds.
The plant type, utilizing a planetary gear, connects a first power transmission channel for transmitting an output of an engine to a vehicle driving shaft to a second power transmission channel in order to avoid a cooperation loss caused by a generator when the engine is stopped and the vehicle runs only by the motor. A power transmission switching means switches between the first and second power transmission channels. But, when the power transmission channels are switched during speed changes a shock occurs because of a torque difference between the power transmission channels.
The above advantages and features of the invention will be more clearly understood from the following detailed description which is provided in connection with the accompanying drawings.
FIG. 1 illustrates a hybrid vehicle utilizing the driving apparatus according to one embodiment of the present invention;
FIG. 2 illustrates a shockless speed change control apparatus in the embodiment of FIG. 1;
Exemplary embodiment of the present invention will be described below in connection with the drawings. Other embodiments may be utilized and structural or logical changes may be made without departing from the spirit or scope of the present invention. Like items are referred to by like reference numerals throughout the drawings.
Referring now to the drawings, in FIG. 1, an engine 11 is an internal combustion engine, in which fuel and air are supplied to generate power. A transmission 12 is a mechanism for changing a driving force of the engine 11 according to the vehicle conditions. The driving force of the engine 11 through the transmission 12 is transmitted to a front wheel driving shaft 14 through a differential gear 13. The vehicle is provided on the rear wheel with a differential gear 15 and a rear wheel driving shaft 16.
An auxiliary power plant including a motor generator (M/G) is an electric motor which receives a supply of electric power from the outside to generate power, or receives a supply of power from the outside to generate electric power. M/G 17 is controlled for a driving force and power generation by a motor controller 18 such as an inverter. Likewise, M/G 19 is controlled for a driving force and power generation by a motor controller 20 such as an inverter. A battery 21 serves to store power to be output by the M/G 17 and the M/G 19. A clutch 22 is a mechanism for transmitting the driving force of the engine 11 to the driving shaft or interrupting the same. A clutch actuator 23 is a device for controlling engagement and disengagement of the clutch 22.