Universal automobile gauge signal converter and conversion method thereof

Abstract

The invention relates to a universal automobile gauge signal converter and an automobile gauge signal conversion method. The converter acquires and calculates the rotating speed and the vehicle speed pulse of a transformed engine, and calculates and outputs the rotating speed pulse and the vehicle speed pulse that are matched with an original automobile gauge, so that the original automobile gauge can continue to accurately display the information of the rotating speed and the vehicle speed of the engine in real time. The converter comprises an MCU (microprogrammed control unit) internally provided with a data FLASH, a pulse acquisition circuit with adjustable filter frequency, a pulse output circuit and a communication serial port, wherein the pulse acquisition circuit with the adjustable filter frequency respectively acquires a rotating speed pulse signal of an engine rotating speed sensor and a vehicle speed pulse signal of a vehicle speed sensor, the MCU processes the signals and outputs the rotating speed pulse signal and the vehicle speed pulse signal through a pulse output circuit to a rotating speed gauge and a vehicle speed gauge of an instrument panel, meanwhile, the MCU further communicates with a PC machine through the communication serial port, wherein the pulse acquisition circuit is internally provided with an RC (remote control) low-pass filter circuit, and the RC low-pass filter circuit adopts a digital potentiometer with a fixed capacitance and an adjustable resistance.

Description

technical field [0001] The invention belongs to the technical field of automobile electronics, and more specifically relates to a general automobile instrument signal converter and a conversion method thereof. Background technique [0002] In the car dashboard, the engine tachometer and the speedometer are two very important gauges. The tachometer collects the pulse of the engine speed sensor to indicate the current engine speed and reflects the working condition of the engine. The speedometer collects the pulse of the speed sensor to indicate the current speed of the vehicle. and its changes. Both the speed sensor and the vehicle speed sensor have a key parameter called the number of pulses, which means that when the engine or the wheel rotates one revolution, several square wave pulses are output. N) square wave pulses. The tachometer calculates the current speed based on the collected pulse frequency of the engine speed sensor and the number of pulses of the speed senso...

AI Technical Summary

Problems solved by technology

[0003] At present, vehicle modification is becoming more and more common. Engine, gearbox and tire modification will cause errors in the indication of the engine tachometer and speedometer. The inconsistent number of speed pulses before and after the engine modification will cause errors in the display of the tachometer, resulting in failure to find out in time when the engine fails.

Inconsistencies in the speed sensor pulse number or tire diameter before and after the gearbox or tire modification will cause the speedometer to display errors. Since the current speed cannot be correctly reflected, it will be difficult to reach the economical speed.

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