Non-clutch AMT (Automatic Manual Transmission) control system and method

Abstract

The invention relates to a non-clutch AMT (Automatic Manual Transmission) control system. The non-clutch AMT control system comprises an MCU (Microprogrammed Control Unit) and a TCU (Transmission Control Unit) which are interconnected. Compared with the prior art, the non-clutch AMT control system has the beneficial effects that after the system enters a shifting process, the TCU can take over the control right of a driving motor, so that the technical effects of optimizing the shifting quality, reducing the shifting time and improving the shifting stability can be achieved. The invention also relates to a non-clutch AMT control method. The non-clutch AMT control method comprises a speed regulating stage; the motor in the shifting process of the method is in a torque mode; the speed regulating stage comprises a motor synchronous speed regulating stage and a mechanical synchronous speed regulating stage. Compared with the prior art, the non-clutch AMT control method has the beneficial effects that the shifting process is divided into six stages through the control method, namely, an unloading stage, an idling stage, an electronic synchronizing stage, a mechanical synchronizing stage, a gear engaging stage and a loading stage, and thus the technical effects of greatly reducing the overall shifting time, reducing the impact in gear engaging, and prolonging the service lives of mechanical parts such as a synchronizer can be achieved.

Description

technical field [0001] The invention relates to a clutchless AMT transmission, in particular to a clutchless AMT control system and method. Background technique [0002] AMT (Automatic Manual Transmission, electronically controlled mechanical automatic transmission) is improved from the traditional manual gear mechanical transmission. AMT combines the advantages of AT (automatic) and MT (manual) transmission devices. It can not only realize the automatic transmission function, but also retain the advantages of high efficiency, low cost, simple structure and easy manufacture of the original manual transmission gear transmission. AMT has been widely used in conventional commercial vehicles. However, in the prior art, most pure electric commercial vehicles still use the original direct drive system, and the performance of climbing and high-speed driving is weakened. In addition, since the direct drive system needs to use a high-torque motor, the powertrain is not only expensi...

AI Technical Summary

Problems solved by technology

However, the invention still adopts the traditional AMT gear shifting strategy, that is, the dynamic control of the clutchless AMT gear shifting process is carried out by controlling the mode switching of the motor, and the self-adjusting speed of the driving motor is used to match the target gear and the current vehicle speed. , because the driving motor mode switching process of this scheme is not controlled by the TCU, the shifting process largely depends on the internal control of the driving motor, thus restricting the further improvement of the shifting quality

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