An electronic gear lever circuit for an automatic manual shifter

Abstract

The invention discloses an electronic shift lever circuit of a manual adjustment and automatic adjustment integrated gearbox. The electronic shift lever circuit comprises a vehicle-mounted direct-current power source feedback circuit unit, a P-gear acquisition circuit unit, a lock control signal acquisition circuit unit, a gear indicting circuit unit, a processor unit, an ESD protective circuit unit, an LIN transceiver unit, an LIN signal filtering unit and a power source unit. The five output ends of the processor unit are connected with the control ends of controllable switching circuit units of a P-gear driving circuit unit, an R-gear driving circuit unit, a N-gear driving circuit unit, a D-gear driving circuit unit and a M-gear driving circuit unit correspondingly through the ESD protective circuit unit; and the vehicle-mounted direct-current power source feedback circuit unit, the P-gear acquisition circuit unit and the lock control signal acquisition circuit unit are connected with the input end of the processor unit through the ESD protective circuit unit, the data end of the processor unit is connected with the RXD end and the TXD end of the LIN transceiver unit, and the LIN end of the LIN transceiver unit is connected with the LIN signal filtering unit and used for being connected with a controller of the gearbox.

Description

technical field [0001] The invention relates to the application field of electronic handbrake display and LIN bus technology of a gear shifter, in particular to an electronic gear lever circuit of a manual-automatic gear shifter. Background technique [0002] With the rapid development of the economy and the popularization of automobile automation, the gear lever of many gearboxes has been separated from the mechanical structure, but is simply used as a manually triggered switch (that is, the electronic gear lever). The signal is transmitted to the gearbox, and then the gearbox completes the shifting operation, which saves the complicated mechanical structure, so it also liberates the inherent position of the mechanical gear lever of the gearbox. In theory, you can place it anywhere, and even make it into any shape; secondly, the automotive LIN bus has been maturely and reliably applied, and the data exchange with the TCU gearbox of the automobile makes full use of relevant ...

AI Technical Summary

Problems solved by technology

[0005] Compared with the prior art, the beneficial effect of the present invention is: to realize the signal acquisition of the electronic shifter power supply, P gear, lock control state, send the current button information of the shifter through the LIN bus, and the controller of the shifter accepts the gear bit information to realize the identification of the P position of the electronic shifter and the lock control button; the processor unit sends the button information to the electronic shifter through the LIN bus, and the electronic shifter receives the LIN message information and feeds back instructions to the processor unit, click The corresponding gear position display unit is lit, which solves the problem that the gear position indication of the electronic shifter is not synchronized with the instrument button display; when the lock control signal is a lock signal, the controller of the gear shifter cannot issue a shift command, thereby The shifter cannot shift gears, and maintains the current gear operation; when the lock control signal is an unlock signal, the controller of the shifter can issue a shift command, and shift gears normally, realizing the lock control function of the shifter; It can perform current compensation for LED lamps, improve the brightness of LED lamps, and avoid problems caused by output short circuit, undervoltage, overvoltage, and ESD

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