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Powertrain and vehicle having same

A power transmission system and power output technology, applied in the field of vehicle transmission, can solve the problems of reducing high-speed driving economy, large energy conversion loss, low power generation efficiency, etc., to avoid energy conversion loss, small energy conversion loss, and parking power generation. Efficient effect

Active Publication Date: 2018-10-16
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the vehicle is running at high speed in this power transmission system, the engine speed is high, and the speed of the generator used for power generation will also be in a relatively high state. The kinetic energy of the engine-electric energy-drives the motor, and the energy conversion loss in this process Larger, reducing the economy of high-speed driving and low power generation efficiency under parking conditions, there is room for improvement

Method used

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  • Powertrain and vehicle having same
  • Powertrain and vehicle having same
  • Powertrain and vehicle having same

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Embodiment Construction

[0027] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] Refer below Figure 1-Figure 5 A power transmission system 1000 according to an embodiment of the present invention is described, as Figure 1-Figure 5 As shown, the power transmission system 1000 according to the embodiment of the present invention includes an engine 200 , a power input shaft 1 , a first motor generator MG1 , a second motor generator MG2 , a planetary gear mechanism P and a power output part 300 .

[0029] Such as Figure 1-Figure 5 As shown, the crankshaft of the engine 200 is connected to the power input shaft 1 to output the power of the engine 200 to the power input shaft 1 , and the crankshaft and the power input shaft 1 are arrang...

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Abstract

The invention discloses a power transmission system and a vehicle provided with the same. The power transmission system comprises an engine, a power input shaft connected with a crankshaft of the engine, a first electric power generator, a second electric power generator, a planetary gear mechanism, a first braking device of a braking planetary carrier and / or a second braking device of a braking gear ring and a power output part, wherein a sun wheel of the planetary gear mechanism is in rigid connection with the power input shaft, a gear ring of the planetary gear mechanism is in rigid connection with a rotor of the first electric power generator, and a planetary carrier of the planetary gear mechanism is in rigid connection with a rotor of the second electric power generator. The power output part and the gear ring are selectively in linkage, the power output part is further selectively in linkage with the planetary carrier so as to output power of at least one of the engine, the first electric power generator and the second electric power generator. According to the embodiment of the invention, the vehicle has good economy during low-speed and high-speed running, and the engine always works in an economic rotation speed interval, directly performs mechanical output during high speed and is high in efficiency.

Description

technical field [0001] The invention relates to the technical field of vehicle transmission, in particular to a power transmission system and a vehicle with the power transmission system. Background technique [0002] In the power transmission system in the related art, the power of the engine is dynamically coupled through a planetary gear mechanism, and the coupled power is divided into two parts by a distribution device, one part is directly output, and the other part is supplied to another motor through a generator. When the vehicle is running at high speed in this power transmission system, the engine speed is high, and the speed of the generator used for power generation will also be in a relatively high state. The kinetic energy of the engine-electric energy-drives the motor, and the energy conversion loss in this process Larger, reducing the economy of high-speed driving and low power generation efficiency under parking conditions, there is room for improvement. Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K6/44B60K6/365
CPCY02T10/62
Inventor 罗永孟翟震徐友彬凌和平
Owner BYD CO LTD
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