Motorcycle gear detection display method

Abstract

The invention discloses a motorcycle gear detection display method using a single-wire gear switch. The motorcycle gear detection display method comprises a single-wire gear sampling circuit (1) and an instrument detection display circuit (2). A gear analog voltage signal outputted by the sampling circuit (1) is connected with the input end of a time-delay circuit (21). Firstly, a gear sampling resistance value is arranged so that differential voltage of sampling voltage Uad of adjacent two gears among a neutral gear and from first to fifth gears presents to be changed from the highest to the lowest, wherein differential voltage of the first gear and the neutral gear presents to be the highest; then analog input inputted to a control unit (22) is confirmed in a time-delay way after analog input is respectively time-delayed for more than 3S and 0.2S-0.3S according to a gearless position and an on-gear position; and finally a boundary value of each gear is confirmed according to the maximum value of disturbance, and safety allowance of correct judgment display is ensured. Gear display problems in reliable detection and displaying single-wire gear switch analog quantity input are solved so that the single-wire gear sampling circuit (1) can be popularized and used, and motorcycle related electric appliance wiring cost is greatly reduced.

Description

technical field [0001] The invention relates to a motorcycle gear detection and display method, in particular to a single-line analog voltage gear detection and display method. Background technique [0002] At present, the known motorcycle gear position signal is a switch digital signal output from the gear position switch. When the motorcycle gear position is connected to neutral gear N, or 1-5 gears, its corresponding output signal is low level ( Connect to the chassis), and when the gear switch is disabled, if the pull-up resistor is connected to the power supply +5V, the output signal will be high. Therefore, its output signal is a digital quantity (high level is 1, low level is 0). Six gear switch, then output six digital quantities. The detection method only needs to detect the level of each gear signal separately, which can distinguish which gear is connected, and then drive the display element. [0003] "A Gear Change Switch Circuit" (Patent No. 201120576364.6) pr...

AI Technical Summary

Problems solved by technology

But there are also two problems: first, if figure 1 As shown, usually the electric start control coil J is also connected to the neutral switch N of the motorcycle. When the gear position is electric start, pull the handbrake clutch switch S3) motor M, this single lead line must be connected to the original neutral line N of the motorcycle

Since the set value and the actual voltage Uad are only 0.45V, in the two cases of electric start and headlight lighting, it is easy to misjudgment and display the gear position (especially when the neutral switch is turned on), resulting in a single-line gear position. Sampling circuit 1 works in such an unreliable way that it cannot even be used

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