Manual Shift Synchronization in Automatic Transmissions
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Solution Overview
Problem
Automatic transmission vehicles lack the driving pleasure and control that manual transmission vehicles offer, as operators cannot perform skills like 'heel-and-toe' shifting, which involves coordinating clutch and accelerator operations for smooth gear changes.
Innovation Solution
A transmission system that allows operators to manually control gear changes by detecting shift operations and synchronizing engine speed with transmission speed through a processor-controlled connecting-and-disconnecting mechanism, enabling manual rotation synchronizing mode for enhanced driving experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic transmission is used with manual mode, then ease of operation is improved, but driving pleasure and control are lost
Solution Approach 1:
The system dynamically switches between automatic rotation synchronizing mode and manual rotation synchronizing mode based on operator input. In manual mode, the transmission system allows the operator to control gear changes while providing feedback on engine speed and transmission speed mismatch, enabling the operator to learn and master manual driving skills while using an automatic transmission vehicle.
Solution Approach 2:
The notification device provides real-time feedback to the operator about the degree of mismatch between engine speed and transmission speed. This feedback mechanism allows the operator to adjust accelerator operations to achieve smooth gear changes, thereby experiencing driving pleasure and mastering manual driving skills even in an automatic transmission vehicle.
2Adaptability or versatility
If manual rotation synchronizing mode is implemented, then driving pleasure is improved, but device complexity increases
Solution Approach 1:
The notification device serves multiple functions: it displays the degree of mismatch between engine speed and transmission speed, provides feedback to the operator, and can guide the operator through the gear change process. This multi-functionality reduces the need for separate complex mechanisms while still enabling manual rotation synchronizing mode.
Solution Approach 2:
The notification device acts as an intermediary between the transmission control unit and the operator. Instead of requiring complex mechanical linkages for manual synchronization, the system uses electronic notification to bridge the gap, allowing the operator to control gear changes with feedback guidance.
3Productivity
If gear change is performed without rotation synchronization, then productivity is improved, but harmful factors increase
Solution Approach 1:
In manual rotation synchronizing mode, the system allows gear changes to proceed without强制 synchronization, but provides feedback that enables the operator to achieve partial synchronization when desired. This approach maintains fast gear change capability while giving the operator the option to reduce shocks when needed.
Solution Approach 2:
The system dynamically adapts to the operator's skill level and intentions. In manual mode, the transmission control unit allows rapid gear changes without synchronization, but the notification device provides real-time feedback that enables the operator to learn and achieve smooth synchronization when desired, balancing speed and comfort.
Data Source
AI summary
A transmission system configured to perform a gear change based on a shift operation by an operator is provided, which includes a power transmission system including a transmission and configured to transmit an engine driving force to wheels, a shift operation detecting module, and a transmission controlling module adapted to be executable of a manual rotation synchronizing mode having first and second steps. In the first step, when a first shift operation for changing the transmission to a lower-speed side is detected, the transmission controlling module sends a control signal to a connecting-and-disconnecting mechanism provided to the power transmission system to suspend the transmission of the driving force. In the second step, when a second shift operation is detected, the transmission controlling module sends a control signal to the connecting-and-disconnecting mechanism to resume the transmission of the driving force while the transmission is switched to the lower-speed side.