Plastic Hydraulic Actuator Cylinders for Compact Transmission Packaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic actuating devices for motor vehicle transmissions are bulky, heavy, and consume excessive space, which is a concern in modern vehicles where space and weight reduction are critical for fuel efficiency.
Innovation Solution
A hydraulic actuating device with injection-molded plastic cylinder housings and a flange plate, where the cylinder housings protrude into the transmission housing, reducing the overall size and weight, and incorporating a compact design with integrated sensors and seals for efficient space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional metallic block-shaped actuating cylinders are used, then structural strength and reliability are ensured, but weight and installation space increase significantly
Solution Approach 1:
The patent changes the material parameter from traditional metal to plastic for the cylinder housing, achieving weight reduction while maintaining structural integrity through careful material selection and design optimization
Solution Approach 2:
The invention uses composite construction by integrating the flange plate and cylinder housing into a single plastic component, potentially incorporating reinforcement elements to maintain strength while reducing weight compared to solid metallic construction
2Volume of stationary object
If traditional metallic block-shaped actuating cylinders are used, then structural integrity is maintained, but installation space and manufacturing complexity increase
Solution Approach 1:
The patent combines the flange plate and cylinder housing into a single integrated plastic component, reducing the number of separate parts from multiple metallic components to one molded piece, thereby reducing installation space and simplifying manufacturing
Solution Approach 2:
The invention replaces traditional mechanical joining methods (bolts, welds, multiple metallic parts) with a single plastic injection molding process, eliminating complex assembly steps and reducing overall device complexity
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a hydraulic 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 loaded and is operatively connected to one of the actuators. The actuation cylinders are combined into a unit that can be flange-mounted on one side, via a flange face (24), to a dividing wall of a transmission housing of the motor vehicle transmission. To this end, the cylinder housings are injection moulded from plastic integrally with a flange plate (28) that runs transversely to the cylinder axes, the flange face being formed on the flange plate. The cylinder housings protrude beyond the flange plate, at least on the side of the flange face, in the direction of the cylinder axes, such that the installation space requirements for the operating device in or on the transmission housing are minimal.