Four-wheel drive vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsAkinori Homan, Satoshi Munakata, Yoshiyuki Aoyama, Kazutaka Noguchi
Life of this patent
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Abstract
A vehicle includes a sensor sensing external temperature, a 2WD/4WD switch operated to input an instruction to switch a two-wheel drive state and a four-wheel drive state, a transfer switching mechanical power transfer for the two-wheel drive state and that for the four-wheel drive state, an actuator actuating the transfer, and an ECU controlling the actuator. The ECU determines from a value detected by the sensor a current supplied to the actuator. Preferably, the transfer includes a synchronizer mechanism driven by power generated by the actuator to transfer a drive shaft's rotation to a driven shaft and engage the shafts together when they achieve synchronous rotation.
Claims15
A four-wheel drive vehicle comprising:
- a detector detecting external temperature;
- an input device operated to input an instruction to switch a two-wheel drive state and a four-wheel drive state;
- a switch unit switching mechanical power transfer for said two-wheel drive state and that for said four-wheel drive state;
- an actuator actuating said switch unit;
- and
- a controller controlling said actuator, wherein said controller depends on a value detected by said detector to determine a current supplied to said actuator.
A four-wheel drive vehicle comprising:
- a detector detecting a working fluid in temperature;
- an input device operated to input an instruction to switch a two-wheel drive state and a four-wheel drive state;
- a switch unit switching mechanical power transfer for said two-wheel drive state and that for said four-wheel drive state;
- an actuator actuating said switch unit;
- and
- a controller controlling said actuator, wherein said controller depends on a value detected by said detector to determine a current supplied to said actuator.
A four-wheel drive vehicle comprising:
- a detector detecting a working fluid in viscosity;
- an input device operated to input an instruction to switch a two-wheel drive state and a four-wheel drive state;
- a switch unit switching mechanical power transfer for said two-wheel drive state and that for said four-wheel drive state;
- an actuator actuating said switch unit;
- and
- a controller controlling said actuator, wherein said controller depends on a value detected by said detector to determine a current supplied to said actuator.
Dependencies are inferred from the claim text.