Gear indicator of commercial vehicle transmission

Abstract

The invention discloses a gear indicator of a commercial vehicle transmission. The gear indicator comprises an engine speed sensor, a transmission output shaft speed sensor, an operating lever front-rear position sensor, a gear display controller and a multi-functional instrument or an external LED display screen, wherein the gear display controller integrates the speed ratio, the operating lever gear position, the clutch switch signal, the neutral gear switch signal, the reverse gear switch signal and the operating level position switch signals for logical gear judgement, so as to judge the current gear state of a vehicle. The gear indicator disclosed by the invention has the advantages that through calculation and analysis of the relative speed ratio of the engine speed to the transmission shaft speed as well as the preset gear coefficient, the gear information can be precisely obtained; the structure of the commercial vehicle transmission is unchanged; and through addition of the gear display controller as well as a corresponding route, a gear position inductive switch, and the LED display screen, the vehicle equipped with any one transmission can have the abilities for modification and display of detailed gears.

Description

technical field [0001] The invention relates to a commercial vehicle transmission gear indicating device, which belongs to the technical field of vehicle gear indicating devices. Background technique [0002] At present, the gear positions of most heavy-duty trucks on the market have reached 16 gears. Whether it is an AMT gearbox or an ordinary gearbox, the instrument usually only displays three gear information: forward gear D, neutral gear N, reverse gear R, and the display content is single. The bit value representation is incomplete. Although there is also a gear position signal provided by the gear selection position sensor in the upper cover of the gearbox, multiple sensors must be assembled, which has high cost and low reliability. [0003] In order to make the vehicle gear position information more intuitive and accurate for the driver’s reference, it is necessary to display all the gear position information during the driving process of the vehicle. The traditional...

AI Technical Summary

Problems solved by technology

[0002] At present, the gear positions of most heavy-duty trucks on the market have reached 16 gears. Whether it is an AMT gearbox or an ordinary gearbox, the instrument usually only displays three gear information: forward gear D, neutral gear N, reverse gear R, and the display content is single. Incomplete representation of bit values

Although there is also a gear position signal provided by the gear selection position sensor in the upper cover of the gearbox, but multiple sensors must be assembled, which is costly and low in reliability

[0003] In order to make the vehicle gear position information more intuitive and accurate for the driver’s reference, it is necessary to display all the gear position information during the driving process of the vehicle. The traditional method of adding a gear position sensor will not only cause the structure of the gearbox to be complicated, but also The obtained gear information is often invalid due to sensor failure

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