Integrated Sensor Interface for Hydraulic Actuator Position Detection
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Solution Overview
Problem
The assembly and contacting of sensor systems for hydraulic or pneumatic actuating devices in motor vehicle transmissions are complex and require significant effort, especially due to the spatial proximity and alignment of actuating pistons, which necessitates complex mechanical transmission elements and multiple sensors.
Innovation Solution
A hydraulic or pneumatic actuating device with integrated sensors, where each cylinder housing is assigned a sensor for detecting the position of a signal element, and an electrical interface for connecting these sensors to a transmission control, allowing for simplified assembly and pre-testing of the sensor system before installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are provided for each actuating piston to detect position, then measurement precision is improved, but device complexity increases due to spatial proximity and alignment requirements
Solution Approach 1:
Multiple sensors that would normally be separate components are integrated into a single sensor system module. The sensor system includes multiple sensors arranged in a compact configuration with common mounting features and shared electrical connections, reducing the number of discrete components and simplifying installation while maintaining position detection accuracy for multiple actuating pistons
2Ease of operation
If sensors are integrated into the actuating device unit, then ease of operation is improved through simplified assembly, but manufacturing precision requirements increase
Solution Approach 1:
The actuating device is divided into modular components: the sensor system is pre-assembled as a separate module with its own mounting structure, then integrated into the actuating device unit as a complete subsystem. This segmentation allows the sensor module to be manufactured and tested independently with standard tolerances, then installed as a unit, reducing the need for high-precision field assembly while maintaining overall integration accuracy
3Adaptability or versatility
If electrical leads are crossed together on the central cylinder body, then connectivity is achieved, but device complexity increases due to cabling requirements
Solution Approach 1:
An electrical interface module serves as an intermediary between the sensors and the external control system. This module provides a standardized connection point with pre-organized electrical contacts that receive signals from multiple sensors through integrated routing channels, eliminating the need for complex lead crossing and manual wiring while maintaining full electrical connectivity
Data Source
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AI summary
The invention relates to a hydraulic or pneumatic operating device (10) for operating actuators in a motor vehicle transmission, said device comprising at least two actuation cylinders (16), each containing a cylinder housing (18) and an actuation piston (22) guided therein along a cylinder axis (20) in a longitudinally displaceable manner, which actuation piston can be hydraulically or pneumatically loaded and is operatively connected to one of the actuators. The actuation cylinders are combined into a unit which can be flange-mounted on or in a transmission housing of the motor vehicle transmission. A sensor for detecting the position of a signal element (32) arranged on each actuation piston is associated with each cylinder housing. An electrical interface (34), which is signal-connected to the sensors, is integrated in the unit, via which interface the sensors can be mutually contacted. In addition, at least one sensor (150) for sensing the speed in the motor vehicle transmission and/or a connection for a sensor of this type are integrated into the unit and are likewise signal-connected to the electrical interface for mutual contacting purposes, such that the mounting and contacting of the sensor system can be greatly simplified.