Semiautomatic Gearbox Shift Lever Sensor Design
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Solution Overview
Problem
The existing semiautomatic gear shift mechanisms in vehicles require complex operations involving clutch engagement and fuel feed management, leading to instability and performance loss during fast running.
Innovation Solution
A semiautomatic gearbox design with a shift lever directly coupled to the gearbox shaft, utilizing an extensimetric system and electronic control unit to sense mechanical deformations and interrupt engine torque for gear changes without clutch operation, reducing fuel feed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional gear shift mechanism with clutch and fuel feed control is used, then gear changing can be achieved, but device complexity and operational difficulty increase
Solution Approach 1:
The patent extracts and eliminates the clutch mechanism from the gear shifting system. The extensimeter directly detects lever movement and triggers electronic control of fuel injection and ignition, removing the need for mechanical clutch engagement and simplifying the overall system architecture.
Solution Approach 2:
The patent replaces the mechanical clutch-based gear shifting system with an electronic control system. The extensimeter (mechanical sensor) converts lever movement into electrical signals that control fuel injection and ignition timing, substituting mechanical operations with electronic control mechanisms.
2Productivity
If multiple operations (clutch engagement, fuel feed reduction, gear engagement) are performed sequentially, then gear changing is achieved, but time consumption and productivity decrease
Solution Approach 1:
The extensimeter continuously monitors the gear shift lever position in advance, detecting movement before the driver completes the shifting action. This allows the electronic control system to prepare fuel injection and ignition timing adjustments proactively, reducing the overall gear changing time.
Solution Approach 2:
The patent maintains continuous monitoring of the gear shift lever through the extensimeter, ensuring that the system is always ready to respond to shifting commands. This continuous detection eliminates idle time between operations and enables seamless transition between gears.
3Reliability
If traditional gear shift with clutch operation is used, then gear engagement is achieved, but vehicle stability and performance are compromised during fast running
Solution Approach 1:
The extensimeter-based system automatically detects gear shift lever movement and triggers the appropriate fuel injection and ignition timing adjustments without requiring manual clutch operation. The system serves itself by converting mechanical lever movement directly into electronic control signals, eliminating the need for separate clutch management.
Solution Approach 2:
The extensimeter acts as an intermediary between the gear shift lever and the engine control system. It converts mechanical lever displacement into electrical signals that directly control fuel injection and ignition timing, providing a smooth transition mechanism that maintains vehicle stability during gear changes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design simplifies construction, reduces costs, and enhances vehicle stability and performance by allowing seamless gear changes without clutch operation, applicable to various vehicles with mechanical ratio gearboxes.
Implementation Method 1
utilizing an extensimetric system and electronic control unit to sense mechanical deformations
Data Source
AI summary
A semiautomatic vehicle gearbox comprising, for said gearbox, a shift lever (10) directly coupled to the gearbox itself; a shaft of said gearbox; and connection means between said shift lever and said shaft; characterised by comprising a sensor (20) for sensing the operation of said shift lever coupled to said connection means.