Vehicle Transmission Control Device Gear Shift Dynamics
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Solution Overview
Problem
Existing transmission control devices in motor vehicles fail to provide predictable driver behavior during gear changes, as they either interrupt or maintain driving power without clear distinction, leading to unclear conditions for the driver.
Innovation Solution
A control device that generates control signals for shift elements in the transmission to perform gear changes with or without interrupting driving power based on conditions such as gear increment, sport mode activation, driver type detection, and accelerator pedal usage, allowing for clear differentiation between types of gear changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If gear changes are performed without interrupting driving power at the output drive, then topological positive couplings are maintained, but shift time increases
Solution Approach 1:
The control device dynamically selects between two gear change strategies (with or without driving power interruption) based on real-time driving conditions, driver behavior, and gear increment requirements, making the system adaptable rather than static
2Loss of time
If gear changes are performed with interruption of driving power, then shift time is reduced, but driver comprehension of vehicle behavior decreases
Solution Approach 1:
The control device uses feedback from multiple sensors (accelerator pedal position, driver type detection, sport mode status) to determine when driving power interruption is appropriate, creating a closed-loop control system that adapts to driver expectations
Solution Approach 2:
The control device changes the operational parameters of the transmission system based on detected driving conditions, switching between different control strategies (with or without power interruption) depending on the situation
3Ease of operation
If control device always maintains driving power during gear changes, then driver comfort is improved, but shift dynamics performance deteriorates
Solution Approach 1:
The system dynamically adjusts its behavior based on real-time conditions, being gentle when comfort is prioritized and aggressive when performance is needed
Solution Approach 2:
The control device changes key operational parameters (driving power interruption decision) based on detected conditions such as sport mode activation, driver type, and accelerator pedal behavior
Data Source
AI summary
A control device of a motor vehicle for controlling a gear change in a transmission of the motor vehicle by generating control signals for transmission shift elements utilized during a gear change. If a gear increment of the gear change to be performed is greater than two gears, and/or if the driver activates a sport gear shift program, and/or if a detection device detects a sporty type of driver, and/or if the driver actuates a kickdown of an accelerator pedal, and/or if the driver actuates the accelerator pedal with a temporal gradient that is greater than a defined limit, the control device generates control signals for the shift elements, being utilized for performing the gear change, with an interruption of driving power, and the control device, in all other instances, generates control signals for the shift elements, being utilized for performing the gear change, without interrupting the tractive force.