Manual Transmission Gear State Detection for Driver Assistance
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Solution Overview
Problem
Existing driver assistance systems in vehicles with manual transmissions struggle to accurately determine the gear position, leading to incorrect activation or deactivation of assistance functions due to ambiguous gear engagement indicators, which can result in unsafe driving conditions.
Innovation Solution
A method using an electronic computing device to analyze wheel speed, clutch pedal position, and engine speed to determine whether the transmission is in gear or neutral, enabling precise operation of driver assistance functions based on these states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driver assistance systems use gear position detection in manual transmissions, then driver assistance functions can be activated when needed, but incorrect activation or deactivation occurs due to ambiguous gear engagement indicators
Solution Approach 1:
The gear position determination is segmented into multiple independent detection channels: wheel speed detection, clutch pedal position detection, and engine speed detection. Each channel provides partial information, and their combination enables reliable gear position determination despite the ambiguity of the gear selector lever position indication.
Solution Approach 2:
The control unit acts as an intermediary that processes and combines information from multiple sensors (wheel speed sensor, clutch pedal position sensor, engine speed sensor) to determine the actual gear position. This intermediary processing resolves the ambiguity between the gear selector lever position and the actual transmission state.
2Reliability
If multiple sensors are used to determine gear position accurately, then driver assistance system operation becomes reliable, but system complexity increases
Solution Approach 1:
The control unit performs multiple functions: it processes wheel speed information, clutch pedal position information, and engine speed information, and uses this combined information for both gear position determination and driver assistance system control. This multi-functionality reduces the need for separate dedicated components.
Solution Approach 2:
The system uses existing sensors already present in the vehicle (wheel speed sensors for ABS/ESP, clutch pedal position sensors, engine speed sensors) rather than adding dedicated gear position sensors. These existing sensors serve dual purposes: their original functions plus gear position detection, thereby avoiding additional hardware complexity.
Data Source
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AI summary
The invention relates to a method for operating a driver assistance system of a motor vehicle, in which at least one wheel speed information, characterizing the wheel speed of at least one wheel of the motor vehicle, is received by means of an electronic computing device from a rotation detection device connected to the at least one wheel. Furthermore, at least one clutch pedal position information, characterizing the position of a clutch pedal of the motor vehicle, is received by means of the electronic computing device from a position detection device, and the at least one wheel speed information is compared with the at least one clutch pedal position information to determine a selected gear or neutral position of a transmission of the motor vehicle. Moreover, the driver assistance system of the motor vehicle is operated by means of the electronic computing device depending on the comparison.