Automated Manual Transmission Motor Generator Torque Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automated manual transmissions experience non-smooth shifting due to torque decline during gear shifting, which is not adequately addressed by existing technologies.
Innovation Solution
Incorporating a motor generator and a planetary gear unit with auxiliary gears to provide rotational power to the output shaft during shifting, compensating for torque decline by using the motor generator's power when the engine power is blocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is blocked during gear shifting in an automated manual transmission, then gear shifting can be completed, but torque decline occurs causing non-smooth shifting
Solution Approach 1:
A motor generator is introduced as an intermediary power source between the engine and output shaft. During gear shifting, when the clutch blocks engine power transmission, the motor generator activates to compensate for torque decline by providing rotational power to the output shaft, preventing the pulling sensation and ensuring smooth shifting
Solution Approach 2:
The motor generator is activated in advance before the clutch fully engages during gear shifting. This preliminary action ensures that power compensation is already in place before torque decline occurs, maintaining continuous power output and preventing non-smooth shifting
2Reliability
If a motor generator is added to compensate for torque decline, then smooth shifting is achieved, but device complexity increases
Solution Approach 1:
The motor generator serves multiple functions: it compensates for torque decline during gear shifting, enables seamless gear transitions, and can potentially provide additional power assistance during acceleration. This multi-functionality justifies the added complexity by delivering multiple benefits from a single component
Solution Approach 2:
The motor generator is integrated with the existing transmission structure, combining its power compensation function with the clutch and gear shifting mechanism. This merging approach minimizes the increase in device complexity by sharing structural elements and control systems rather than adding completely separate components
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 configuration prevents torque decline and ensures smooth, stable shifting, enhancing the commercial viability of the vehicle by maintaining power transmission efficiency.
Implementation Method 1
a motor generator that is coupled to still another rotational element of the rotational elements and provides a rotational power to the still another rotational element in shifting gears
Implementation Method 2
a planetary gear unit provided with three or more rotational elements wherein one rotational element thereof receives power from an engine to be rotated constantly and another rotational element thereof is coupled to the first auxiliary gear
Implementation Method 3
a first auxiliary gear that is rotatably provided on an INPUT shaft to be rotated relatively with respect to the INPUT shaft and wherein the second auxiliary gear is provided on an OUTPUT shaft to be meshed with the first auxiliary gear
Data Source
AI summary
An automated manual transmission may include first and second auxiliary gears, wherein the first auxiliary gear is rotatably provided on an INPUT shaft to be rotated relatively with respect to the INPUT shaft and wherein the second auxiliary gear is provided on an OUTPUT shaft to be meshed with the first auxiliary gear, a planetary gear unit provided with three or more rotational elements wherein one rotational element thereof receives power from an engine to be rotated constantly and another rotational element thereof is coupled to the first auxiliary gear provided on the INPUT shaft to be rotated, and a motor generator that is coupled to still another rotational element of the rotational elements and provides a rotational power to the still another rotational element in shifting gears so that the rotational power is transmitted to the OUTPUT shaft through the first and second auxiliary gears.