Transmission for vehicle
First Claim
1. A transmission for a vehicle having an engine and electric power storage means, said transmission comprising:
- an input shaft driven by the engine;
an output shaft;
a generator including a rotor; and
planetary gear means for establishing a plurality of gear stages including a reverse gear stage, a low gear stage and higher gear stages, and for operating as a differential gear unit in said low gear stage, said planetary gear means including an input element connected to said input shaft, an output element connected to said output shaft and a reaction element connected to said rotor.
1 Assignment
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Accused Products
Abstract
A transmission which allows for relative rotation between an input shaft in an output shaft while lowering fuel consumption. An electric motor/generator has one element fixed to a reaction-force element of a planetary gear unit in low gear. Consequently, when the vehicle is halted, the relative rotation between the input shaft and the output shaft in the transmission can be utilized as a reaction-force to drive the motor/generator as a generator. Since electric power is generated by means of the motor/generator, the generated energy is collected and fuel consumption by the engine is reduced. In other gear stages, the motor/generator is adapted to receive the energy produced when the vehicle is decelerated by means of regenerative braking.
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Citations
18 Claims
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1. A transmission for a vehicle having an engine and electric power storage means, said transmission comprising:
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an input shaft driven by the engine; an output shaft; a generator including a rotor; and planetary gear means for establishing a plurality of gear stages including a reverse gear stage, a low gear stage and higher gear stages, and for operating as a differential gear unit in said low gear stage, said planetary gear means including an input element connected to said input shaft, an output element connected to said output shaft and a reaction element connected to said rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A transmission for a vehicle having an engine and electric power storage means, said transmission comprising:
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an input shaft driven by the engine; an output shaft; an electric motor including a rotor; and planetary gear means for establishing a plurality of gear stages including a reverse gear stage, a low gear stage and higher gear stages, and for operating as a differential gear unit in said low gear stage, said planetary gear means including an input element connected to said input shaft, an output element connected to said output shaft and a reaction element connected to said rotor. - View Dependent Claims (10)
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11. A transmission for a vehicle having an engine and electric power storage means, said transmission comprising:
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an input shaft driven by the engine; an output shaft; an electric motor/generator capable of operating in a first mode as a motor and in a second mode as a generator, said motor/generator including a rotor; and planetary gear means for establishing a plurality of gear stages including a reverse gear stage, a low gear stage and higher gear stages, and for operating as a differential gear unit in said low gear stage, said planetary gear means including an input element connected to said input shaft, an output element connected to said output shaft and a reaction element connected to said rotor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification