Upshift control method

Abstract

The invention provides an upshift control method. The method comprises the following steps: in a pre-charging stage, when a first brake and a second brake meet preset conditions, the torque of an engine is reduced to preset torque, and a clutch C0 adjusts the pressure according to the torque requirement of the engine; in a torque stage, the second brake is adjusted to the first torque, the first brake is adjusted to the second torque, and driving motor torque works according to the external characteristics; in a rotating speed stage, the input shaft rotating speed is reduced to the target gear rotating speed, the first brake increases torque, the driving motor torque increases, and a generator outputs reverse torque; and in a closing stage, the engine and an input shaft of a driving motor are synchronous in rotating speed, the torque of the second brake is reduced to zero, the torque of the first brake is added with safety torque, the torque of the generator is zero, the engine torque is subjected to external characteristic torque control according to the current rotating speed, and the clutch C0 is locked according to the engine torque. According to the method, the risk of ring combination of a dual mass flywheel (DMF) is reduced, and the reverse torque of a P1 spline shaft is also reduced.

Description

technical field [0001] The invention relates to the technical field of hybrid power, in particular to an upshift control method. Background technique [0002] The development of transmission has gone through manual transmission, automatic transmission, automatic manual transmission, dual-clutch transmission, and current hybrid transmission. A key technology in the transmission is shift control. With the development of the transmission, the shifting method of the transmission is also updated. [0003] At present, there is a phenomenon that the engine and the motor are rigidly connected or indirectly rigidly connected to the shaft. At the same time, the engine with a dual-mass flywheel has also experienced the problem of laps, and the phenomenon is more likely to occur. At present, most of the automatic transmissions and hybrid transmissions on the market use AT shift control strategies and DCT shift strategies, but these two methods do not take the structural characteristics...

AI Technical Summary

Problems solved by technology

Using the method of reducing the engine torque to 0 to shift gears is not conducive to engine combustion, and it is easy to cause early combustion

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