Automated Manual Transmission Motor Clutch Shifting Disconnection
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Solution Overview
Problem
Automated manual transmissions with added motors experience a feeling of disconnection during shifting, which existing configurations cannot effectively eliminate without additional shifting mechanisms or actuators.
Innovation Solution
The integration of one-way and two-way clutches between the motor shaft and input/output shafts allows torque transmission in specific directions, enabling direct motor assistance during shifting without additional mechanisms or actuators, and facilitates engine starting and regenerative braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a motor is added between the engine and transmission to enable hybrid operation, then power transmission efficiency and fuel economy are improved, but a feeling of disconnection during shifting occurs
Solution Approach 1:
A clutch device is introduced as an intermediary component between the motor shaft and the transmission shafts. This clutch selectively engages or disengages torque transmission in specific rotational directions, allowing the motor to assist during shifting operations without causing disconnection feelings, while maintaining fuel efficiency benefits during normal operation
2Ease of operation
If additional shifting mechanisms or actuators are added to remove the feeling of disconnection, then shifting smoothness is improved, but device complexity increases
Solution Approach 1:
The clutch device serves multiple functions: it enables torque assist during shifting to remove disconnection feelings, allows engine starting by the motor, and facilitates regenerative braking. By making this single component multi-functional, the patent avoids adding separate shifting mechanisms or actuators, thus maintaining simplicity while improving shifting smoothness
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 effectively removes the feeling of disconnection during shifting across all gear stages and enables torque assist, while allowing motor-assisted engine starting and regenerative braking, enhancing the shifting experience and efficiency.
Implementation Method 1
a first one-way clutch disposed on a power transmission path between the motor shaft and the input shaft
Implementation Method 2
a second one-way clutch disposed on a power transmission path between the motor shaft and the output shaft
Implementation Method 3
a first two-way clutch disposed on a power transmission path between the motor shaft and the input shaft; and a second two-way clutch disposed on a power transmission path between the motor shaft and the output shaft
Implementation Method 4
a shifting device including a plurality of gear pairs, which have different gear ratios and are engaged with each other on the input shaft and the output shaft
Data Source
AI summary
An automated manual transmission may include an input shaft selectively provided with torque from an engine through a clutch; an output shaft disposed in parallel with the input shaft; a shifting device including a plurality of gear pairs, which have different gear ratios and are engaged with each other on the input shaft and the output shaft, and selecting at least a gear pair out of the plurality of gear pairs, by using a coupling member; wherein the at least a gear pair corresponds to a speed of a vehicle a motor shaft connected to a motor and provided with torque from the motor; and clutch devices disposed between the motor shaft and the input shaft to transmit torque in a first direction thereof and between the motor shaft and the output shaft to transmit torque in a second direction thereof.