Multi-Step Transmission Inductive Power Feed for Shift Actuation
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Solution Overview
Problem
Motor vehicle transmissions experience significant power loss due to the need for transfer points that require pressure-resistant seals, which can be inefficient compared to hydraulic actuating actuators and complicate the energy supply system.
Innovation Solution
A motor vehicle transmission with an inductive connection unit that supplies electrical energy directly to the actuating actuator through rotatable transmission components, eliminating the need for transfer points and incorporating a planetary gear mechanism with an electric motor and self-locking actuator for reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If transfer points with pressure-resistant seals are used to supply energy to actuating actuators, then energy supply is enabled, but power loss increases and system complexity increases
Solution Approach 1:
The patent replaces the mechanical hydraulic actuating actuator system with an electromagnetic motor-driven system. The motor is directly integrated into the transmission component, eliminating the need for hydraulic transfer points and pressure-resistant seals. This substitution reduces power loss and simplifies the system by removing complex sealing mechanisms while maintaining the ability to actuate switching units.
Solution Approach 2:
The patent merges the actuating actuator (motor) directly with the transmission component (coupling element). The motor is integrated into the coupling element itself, allowing direct drive without external transfer points. This merging eliminates the need for separate energy supply pathways and reduces system complexity while improving energy efficiency.
2Loss of energy
If hydraulic actuating actuators are used, then actuation is enabled, but power loss increases due to transfer points requiring pressure-resistant seals
Solution Approach 1:
The patent substitutes hydraulic actuation with electromagnetic motor actuation. The motor is integrated directly into the coupling element, eliminating hydraulic transfer points and pressure-resistant seals. This substitution dramatically reduces power loss associated with hydraulic systems while simplifying the overall actuation mechanism.
Solution Approach 2:
The patent extracts and removes the hydraulic actuating actuator and its associated transfer points with pressure-resistant seals from the system. By eliminating these components entirely and replacing them with an integrated motor system, power loss is reduced and system complexity is simplified.
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 solution reduces power loss to levels comparable to manual transmissions, simplifies the equipment system, and enables efficient energy transmission with minimal energy consumption, especially when the switching unit is internally arranged.
Implementation Method 1
an inductive connection unit which connects the control and/or regulating unit and the actuating actuator to one another and which is provided at least to supply the actuating actuator with electrical energy
Implementation Method 2
the actuating actuator has a planetary gear mechanism based on the Wolfrom principle, the planetary gear mechanism having a sun gear, a planetary gear carrier, planetary gears arranged in pairs on the planetary gear carrier, and two ring gears
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a motor vehicle transmission, in particular a multi-step transmission, comprising at least one shifting unit (S3a, S6a; S3b) having two coupling elements (S31a, S32, S61a, S62a; S31 b, S32b) that can rotate relative to one another and be rotationally fixed to one another, as well as an actuator (17a; 17b), and comprising an open-loop and/or closed-loop control unit (18a) provided for controlling the at least one actuator (17a; 17b), wherein the motor vehicle transmission has an inductive connection unit (19a) which connects the open-loop and/or closed-loop control unit (18a) and the actuator (17a; 17b) to one another, and which is at least provided for supplying the actuator (17a; 17b) with electrical energy.