Power train for hybrid electric vehicle
First Claim
1. A power train for a hybrid electric vehicle, comprising:
- an engine that generates a driving force by burning a fuel;
first and second motor generators that are supplied with electrical energy to generate driving forces and supplied with kinetic energies to output as electrical energy;
a battery that stores the electrical energy supplied from the first and second motor generators and supplies electrical energy required for operating the first and second motor generators;
a plurality of planetary gear sets that convert the driving forces output from the engine, and the first and second motor generators to have an appropriate gear ratio according to a driving state and output the converted driving forces to a driving shaft; and
a plurality of breaks that are provided in the plurality of planetary gear sets and control the output revolution on the basis of the gear ratio determined according to a driving state.
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Accused Products
Abstract
A power train prevents the decrease in the power efficiency accompanied by the converting process between the kinetic energy and the electrical energy due to the large energy flow through the electrical path when the motor generator serves as a transmission and thus prevents the increase in the capacity of the motor generator and the bad fuel economy. The power train for a hybrid electric vehicle includes an engine, first and second motor generator, a battery, a plurality of planetary gear sets, and a plurality of breaks. The plurality of planetary gear sets convert the driving forces output from the engine, and the first and second motor generators to have an appropriate gear ratio according to a driving state and output the converted driving forces to a driving shaft. The plurality of breaks are provided in the plurality of planetary gear sets and control the output revolution on the basis of the gear ratio determined according to a driving state.
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Citations
5 Claims
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1. A power train for a hybrid electric vehicle, comprising:
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an engine that generates a driving force by burning a fuel; first and second motor generators that are supplied with electrical energy to generate driving forces and supplied with kinetic energies to output as electrical energy; a battery that stores the electrical energy supplied from the first and second motor generators and supplies electrical energy required for operating the first and second motor generators; a plurality of planetary gear sets that convert the driving forces output from the engine, and the first and second motor generators to have an appropriate gear ratio according to a driving state and output the converted driving forces to a driving shaft; and a plurality of breaks that are provided in the plurality of planetary gear sets and control the output revolution on the basis of the gear ratio determined according to a driving state. - View Dependent Claims (2, 3)
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4. A power train for a hybrid electric vehicle, comprising:
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an engine; first and second motor generators; a battery communicating with the first and second motor generators; a first planetary gear set including a first sun gear coupled to the first motor generator, a first carrier coupled to the engine, and a first ring gear coupled to the second motor generator, a second planetary gear set including a second sun gear coupled to a first break, a second carrier coupled to the first sun gear, and a second ring gear coupled to the first carrier; and a third planetary gear set including a third sun gear coupled to the second ring gear, a third carrier coupled to the first ring gear and a slave driving device, and a third ring gear coupled to a second break, whereby the plurality of planetary gear sets convert driving forces output from the engine, and the first and second motor generators to have an appropriate gear ratio according to a driving state and output the converted driving forces to a driving shaft. - View Dependent Claims (5)
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Specification