Engine locking double-motor single-planetary-line two-stage speed reduction hybrid power system

Abstract

The invention relates to an engine locking double-motor single-planetary-line two-stage speed reduction hybrid power system which comprises an engine, an engine locking mechanism, a first motor, a planetary gear mechanism, a second motor and a two-stage speed reduction mechanism. The engine locking mechanism is driven by a worm gear speed reduction motor; the two-stage speed reduction mechanism comprises a driving gear, a countershaft gear and a driven gear; an engine flywheel is connected with the engine locking mechanism; the engine is connected with a planetary carrier; the first motor is connected with a sun gear; the second motor is connected with the driving gear; a gear ring is connected with the driven gear; the driving gear is meshed with the countershaft gear; the countershaft gear is meshed with the driven gear; and the driven gear is connected with a main speed reducer. Compared with the prior art, the engine locking double-motor single-planetary-line two-stage speed reduction hybrid power system has the advantages that the structure is simplified, design and manufacturing difficulty is reduced and cost is reduced; and reliability of the engine locking mechanism and reliability of a finished vehicle are improved, energy consumption of the system is also reduced and system efficiency is improved.

Description

technical field [0001] The invention relates to a power system of a hybrid electric vehicle, in particular to an engine-locking dual-motor single-planet row two-stage deceleration hybrid power system. Background technique [0002] Hybrid electric vehicles are a practical solution to energy and environmental issues at this stage. However, there are certain defects in the existing dual-motor planetary row hybrid power system. [0003] China Patent Authorization Announcement No. CN102320238B, the authorized announcement date is August 21, 2013, discloses a hybrid power device with an engine buffer lock mechanism, including an engine, a buffer lock combination mechanism, a first generator / motor, a second Generator / motor, first-row planetary gear mechanism, second-row planetary gear mechanism, first shaft and second shaft; buffer lock combination mechanism includes electromagnet, lock pin, integrated ring gear pressure plate and shock-absorbing friction plate ; The flywheel of ...

AI Technical Summary

Problems solved by technology

[0004] Through analysis, it is found that the above invention has the following defects: first, because the outer ring gear of the second row planetary gear mechanism is fixed or the planet carrier is fixed, the planetary gear mechanism only realizes the speed change function, resulting in a waste of the function of the planetary gear mechanism; Second, the second-row planetary gear mechanism is used as the speed change mechanism of the second generator / motor. Due to the difficulty in designing and manufacturing the planet carrier and ring gear of the planetary gear mechanism, and the planetary gear mechanism must use non-standard bearings, the cost increases; Third, The buffer lock combination mechanism includes electromagnets and other parts. When the hybrid electric vehicle works in the pure electric mode for a long time, the buffer lock combination mechanism needs to lock the engine for a long time, resulting in the need for a long time to energize the electromagnet; Powering on for a long time will cause serious heating of the coil, leading to premature aging and damage of the coil, and eventually lead to the failure of the electromagnet and the failure of the buffer lock combination mechanism; fourth, the long-time power-on of the electromagnet increases the energy consumption of the system and reduces the system efficiency.

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