Dynamic Transmission Control for Shifting Comfort
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Solution Overview
Problem
Common methods for controlling automatic transmissions in vehicles are limited in adjusting to the current operating status, resulting in suboptimal driving comfort.
Innovation Solution
A dynamic and variable control system that adjusts gear ratios based on pre-determined shifting programs and special functions, allowing for changes in the operating range of the motor vehicle's motor speed, enabling adjustments to prevent gear shifts according to actual operating conditions, thereby enhancing driving comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static transmission control with fixed special functions is used, then the control system is simple, but the adaptability to current operating status is limited
Solution Approach 1:
The patent applies dynamics by making the operating range of the anti-shifting device variable rather than fixed. The control system dynamically adjusts the motor speed range (n1 to n2) where gear shifts are prevented, based on real-time operating conditions such as driver behavior, vehicle load, and road gradient. This allows the transmission control to adapt continuously to changing operating status while maintaining a relatively simple control architecture.
Solution Approach 2:
The patent changes the parameter of the operating range (motor speed limits n1 and n2) of the anti-shifting device based on operating conditions. By varying these speed thresholds dynamically, the system can prevent gear shifts in appropriate operating conditions (such as during engine braking or high-load situations) while allowing shifts in normal conditions, thus improving adaptability without requiring a completely complex control system.
2Ease of operation
If gear shifts are prevented by special functions, then driving comfort is improved, but the transmission cannot respond to actual operating conditions
Solution Approach 1:
The patent dynamically changes the operating range parameters (motor speed limits) of the anti-shifting device based on actual operating conditions. When conditions warrant shift prevention (such as during engine braking, high load, or specific driver behaviors), the system activates the special function within a defined motor speed range. When conditions change, the range is adjusted or deactivated, allowing the transmission to respond appropriately to actual operating status while maintaining driving comfort when needed.
Data Source
AI summary
Described is a method for controlling a transmission for motor vehicles, especially an automatic transmission or an automatic gearbox, where a gear ratio (“1”, “2”, “3”, “4”, “5”, “6”) is adjusted according to operating conditions by means of pre-determined shifting programs (“0”, “Eco”, “Normal”, “Sport”, “Mountain II”, “Warm-up”, “Tip”) and corresponding specific shifting values (HS45, RS43) and where in relation to a vehicle's actual operating condition at least one special function (“Curve Recognition KE”, “Rapid Drive Pedal Release FO”, “Spontaneous Delay Vehicle SVF”, “Drive Speed Control FGR”, “Drive Dynamic control ESP”) is activated, which prevents the change from an actual gear ratio to a target gear ratio requested by a shifting program within a pre-determined operating range of a vehicle. In a first version of the method, the operating range, wherein a gear ratio change of the transmission is prevented, is changed in relation to applied specific values that depend on the operating condition. In a second version of the method it is planned that the shifting characteristics are changed in relation to applied specific values that depend on the operating condition in such a manner that the operating points of the vehicle that are defined on the side of the shift characteristics, for which gear ratio changes must be performed, are adjusted to the actual operating condition of the vehicle.