Transmission Control Device Bus System Segmentation
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Solution Overview
Problem
Current transmission arrangements in motor vehicles face challenges in achieving reliable operation while being cost-effective and weight-saving, particularly due to complex sensor and actuator configurations and environmental exposure within the transmission housing.
Innovation Solution
A transmission arrangement featuring a first component group with sensor elements and actuators within a housing, coupled via a bus system to an in-situ control device, allowing for separate replacement and reliable communication, with the control device located outside the housing to reduce temperature and acceleration exposure, and utilizing communication interfaces for signal processing and encoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the in-situ control device is arranged inside the transmission housing, then the lines of the bus system can be kept short, but the control device is exposed to high temperature, strong accelerations, and oil, increasing requirements for temperature resistance and acceleration resistance
Solution Approach 1:
The system is divided into two spatial segments: the in-situ control device is placed outside the transmission housing in a more favorable environment, while the sensor elements and actuators remain inside. This segmentation allows the control device to be protected from harsh conditions while maintaining short connection lines through the bus system.
Solution Approach 2:
The bus system acts as an intermediary communication medium between the in-situ control device (outside housing) and the sensor/actuator components (inside housing). This intermediary enables reliable signal transmission while allowing spatial separation that protects the control device from environmental factors.
2Reliability
If multiple sensor elements and actuators are arranged in the transmission housing, then the transmission can be monitored and controlled effectively, but the complexity of the arrangement increases
Solution Approach 1:
The in-situ control device serves multiple functions: it receives sensor signals from various sensor elements, processes this information, and controls multiple actuators within the transmission. This multi-functionality consolidates control operations into a single device, reducing overall system complexity while maintaining comprehensive transmission monitoring and control.
Solution Approach 2:
The bus system establishes feedback loops between sensor elements (monitoring transmission parameters) and the in-situ control device, which then adjusts actuator positions accordingly. This feedback mechanism enables reliable closed-loop control of transmission operations without requiring complex point-to-point wiring for each sensor-actuator pair.
3Object-affected harmful factors
If the in-situ control device is arranged outside the transmission housing, then temperature and acceleration requirements are reduced, but the lines of the bus system become longer
Solution Approach 1:
The patent replaces traditional mechanical wiring with an electrical bus system for communication between the in-situ control device and the sensor/actuator components. This substitution allows for more flexible routing of connections, enabling the control device to be positioned outside the housing while maintaining manageable connection lengths through the bus architecture.
Data Source
AI summary
A gear assembly has a gear housing. A first component group is arranged in a first partial area within the gear housing. The first component group includes at least one sensor element and/or at least one actuator. A remote control device is coupled to the first component group so that signals can be exchanged by way of a bus system.