K-bus Electronics Automotive Instrument Design

Electronic automobile instrument is a kind combination meter controlled by SCM to show the speed, rev, fule level, cooling water temperature, mileage and other correlative data during the vehicle running. It applies the backlight to the instrument and the alarm function with LED. It has the advantage of simple structure, pretty appearance, easy assembled, fine indication and high reliability comparing to the traditional mechanical instrument. It has been the developing trend of the automobile instrument. K line diagnose is a new technology developed in these years for automobile. ECU on vehicle is communicated with the instrument to send the information or failure code of ABS, ASR, airbag and engine electronic controlling injection parameter and indication on instrument through K line. It can also be used to adjust the correlative parameter of the instrument to meet the requirement from the customer by the K line protocol.This file is a kind of K line diagnose electronic automobile instrument developed and designed on the market requirement and the condition that we have not the actual instrument in company referring to the standard of Cherry B13.4 gauges (Speed gauge, Tach gauge, fuel level gauge and engine cooling water temperature gauge) is adopted high quality stepper motor;Backligh is adopted the LED from OSRAM company, brightness of the LED is adjustable;LCD display is adopted TN technology, indication with positive polar to show the gear position, clock, trip odometer, total odometer, instantaneous fule consume, mean fule consume;All the alarm is adopted LED;Gauge damping is controlled with softwarer;This instrument has the diagnose function and configure function on line, It is adopted K line diagnose method;Main jod content:1-Analyse the function of Cherry B13 and correlative standard;2-Operation principle design, PCB design and program design; 3-Calibration and testThe instrument implements all the function and has passed all the test performed inside Chengdu Tianxing Instrument & Meter Co., Ltd according to the automobile industrial standard QC/T727-2007《Instrument to Automobile and motorcycle》。...