A control method for the coordination between the engine and gear shift of a hybrid electric vehicle with a sliding start
A technology of a hybrid vehicle and a control method, which is applied to the arrangement of multiple different prime movers of a hybrid vehicle, a general power plant, and a motor vehicle, etc., can solve the problem of discontinuous sliding start of the hydraulic system, affecting the power and smoothness of the vehicle. To ensure the consistency of the transmitted torque direction, improve the starting jitter, and achieve the effect of good smoothness
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Embodiment 1
[0034] A control method for coordinating the engine and gear shifting of a hybrid vehicle with slip start, the overall control flow chart is as follows figure 2 As shown, when the vehicle is running at a purely electric low speed and the second brake B2 is locked, it is determined whether the user needs to perform a rapid acceleration operation based on the vehicle's current accelerator pedal, vehicle speed signal and battery power signal received by the vehicle controller , if so, the vehicle controller controls the second clutch C1 to start the engine and the small motor E1 to achieve gear shifting at the same time, until the first brake B1 is locked and the second clutch C1 is closed, and the vehicle is in a hybrid driving state;
[0035] A. Start the engine with the second clutch slipping according to the following steps:
[0036] S1: The vehicle controller sets the pressure regulating valve current of the second clutch C1 according to the pre-charging curve, controls the...
Embodiment 2
[0048] A control method for coordinating a slippery start engine of a hybrid electric vehicle and gear shifting, its steps are similar to those of the control method for a slippery start engine of a hybrid electric vehicle in embodiment 1 and a coordinated control method for shifting gears, the difference being that: In step S2, the preset engine fuel injection ignition speed threshold A is 500 rpm; in steps S5 and S6, the preset engine torque request threshold B is 10 Nm.
Embodiment 3
[0050] A control method for coordinating a slippery start engine of a hybrid electric vehicle and gear shifting, its steps are similar to those of the control method for a slippery start engine of a hybrid electric vehicle in embodiment 1 and a coordinated control method for shifting gears, the difference being that: In step S2, the preset engine fuel injection ignition speed threshold A is 450rpm; in steps S5 and S6, the preset engine torque request threshold B is 7.5Nm.
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