A cvt electronic control system and method

Abstract

The invention discloses a CVT electronic control system and method, comprising a motor control circuit, a motor locking device, a power supply module, a speed ratio execution motor and a CAN communication network; AD conversion is input to the single-chip microcomputer; the engine brake signal is input to the single-chip microcomputer through the switch input signal, that is, the switch signal; the engine speed pulse signal is input to the single-chip motor lock circuit through the pulse measurement circuit and numerical conversion, and the single-chip microcomputer outputs the PWM signal to the speed than the executive motor, the single-chip microcomputer outputs the switching signal to the speed ratio executive motor lock relay; the single-chip microcomputer is MC9S12G48 and calculates the rotating speed according to the cycle method and the frequency method, and the present invention makes the actual transmission speed ratio constantly approach the target speed ratio, Realize the balance between engine output torque and driving resistance, and give full play to the best performance of the vehicle.

Description

technical field [0001] The invention relates to a CVT gearbox in an automobile, in particular to an electronic control in the CVT gearbox. Background technique [0002] The automobile industry originated in Europe, from the steam engine to the internal combustion engine. After more than 100 years of development, the development of modern automobiles has entered a mature stage. With the rapid development of automobiles, people have higher and higher requirements for automobiles, not only for the comfort, safety and economy of automobiles, but also for the driving performance and emission of automobiles. standard. Therefore, many innovative technologies have been brought, and automatic transmission technology is one of the important technologies. [0003] A continuously variable transmission is a transmission that can continuously change the speed ratio. The current belt-driven continuously variable transmission mainly adopts the metal belt type and the metal chain type. Co...

AI Technical Summary

Problems solved by technology

[0004] In modern metal belt CVT, mechanical hydraulic control system and electronic hydraulic control system are generally used, but the mechanical hydraulic control system cannot realize the precise control of the speed ratio, and the working pressure of this hydraulic control system is high, resulting in the energy of the hydraulic system. The loss increases, and the hydraulic control system requires the oil pump to provide continuous and stable pressure, and the oil pump continues to consume energy

Therefore, this hydraulic control system has the disadvantages of low reliability, high energy consumption and high cost.

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