Automatic Gearbox Uphill Pickup Control Strategy
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Solution Overview
Problem
Conventional automatic gearboxes fail to adapt to the specific demands of starting on an uphill slope, leading to uncomfortable vehicle behavior and potential clutch damage due to inadequate control strategies, unlike manual gearboxes where the driver can anticipate and modulate clutch and accelerator pedals.
Innovation Solution
An electronic control strategy for automatic or robotized gearboxes that adjusts operations based on the gradient of the uphill slope and geographical altitude, using sensors for acceleration and atmospheric pressure data to increase engine torque appropriately during pickup, thereby enhancing clutch engagement control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the friction clutch is engaged at the same speed as the engine during horizontal movement, then the gearbox operation is simple, but the vehicle behavior becomes anomalous and uncomfortable on uphill slopes
Solution Approach 1:
The patent applies dynamics by making the clutch engagement speed variable rather than fixed. The control system dynamically adjusts the clutch engagement speed based on detected uphill conditions, allowing the engagement to occur at higher speeds when needed for uphill starts, thus preventing anomalous behavior while maintaining simple automated operation
Solution Approach 2:
The patent changes the parameter of clutch engagement speed based on operating conditions. When uphill slope is detected, the system modifies the engagement speed parameter to be higher than normal, which prevents clutch slipping and ensures reliable vehicle behavior during uphill pickup without requiring complex manual intervention
2Reliability
If the clutch engagement speed is increased for uphill pickup, then the vehicle behavior becomes stable on slopes, but the risk of clutch slipping increases without proper control
Solution Approach 1:
The patent implements feedback by using sensors to detect uphill conditions and feeding this information back to the control system. The control system then adjusts the clutch engagement strategy accordingly, increasing engagement speed only when uphill conditions are detected, which stabilizes vehicle behavior while preventing unnecessary clutch slipping during normal horizontal operation
Solution Approach 2:
The patent applies preliminary action by detecting uphill conditions before clutch engagement and pre-adjusting the engagement parameters. The control system prepares the clutch for engagement at the appropriate speed based on预先 detected slope conditions, ensuring stable vehicle behavior from the start while avoiding clutch slipping
3Object-affected harmful factors
If the clutch engagement speed is modulated manually for uphill starts, then the clutch slipping is prevented, but the system requires complex manual intervention
Solution Approach 1:
The patent applies self-service by enabling the automatic gearbox system to detect uphill conditions and autonomously adjust clutch engagement parameters without driver intervention. The control system serves itself by using sensor data to automatically modulate clutch engagement speed, preventing clutch slipping while maintaining ease of operation
Solution Approach 2:
The patent replaces the manual mechanical modulation of clutch engagement with an electronic control system. The electronic means detects uphill conditions and automatically adjusts engagement parameters, substituting the need for manual pedal modulation with an automated electronic control mechanism that prevents clutch slipping
4Device complexity
If the conventional automatic gearbox control is used on uphill slopes, then the system remains simple, but clutch damage occurs due to inadequate control
Solution Approach 1:
The patent applies preliminary action by detecting uphill conditions before clutch engagement and pre-adjusting engagement parameters. This preliminary detection and adjustment prevents clutch slipping and damage from occurring in the first place, maintaining clutch durability without requiring complex post-engagement control mechanisms
Solution Approach 2:
The patent changes the clutch engagement speed parameter based on detected uphill conditions. By modifying this critical parameter only when needed, the system protects the clutch from damage during uphill starts while maintaining simple conventional control architecture for normal operation
Data Source
AI summary
A method and apparatus to control the pickup on an uphill slope of an automotive vehicle provided with an automatic or robotized gearbox provide the definition of a control strategy of the gear box operation, also according to the gradient of the uphill slope, which is preferably calculated based on a longitudinal acceleration value of the automotive vehicle, and based on the altitude at which the automotive vehicle can be found, which is preferably calculated based on a detected atmospheric pressure value. In this way, it is also possible to consider the reduction in the engine torque due to the reduction in the air density with altitude.