Hydraulic Clutch Offset Oil Passages
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Solution Overview
Problem
In hydraulic clutch devices, increased conduit resistance in the oil passage on the discharge side can lead to the generation of operation pressure within the oil chamber even in the absence of instructed oil pressure, particularly at low temperatures, causing issues like dragging.
Innovation Solution
The hydraulic clutch device incorporates a pressure regulating valve positioned downstream, with a casing having an insertion hole and offset oil passages to prevent direct oil flow from the upstream side to the downstream side, reducing conduit resistance and ensuring effective sealing, thereby improving discharge capacity and preventing operation pressure generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pressure regulating valve is positioned downstream with offset oil passages to reduce conduit resistance, then the discharge capacity of oil is improved, but the device complexity increases due to the offset passage configuration
Solution Approach 1:
The oil passages are configured with offset positions in different spatial dimensions within the casing. The upstream side oil passage and downstream side oil passage are arranged at different locations and heights, creating a three-dimensional flow path that reduces resistance while maintaining a compact overall structure.
Solution Approach 2:
The oil flow path is segmented into distinct upstream and downstream passages with separate openings into the insertion hole. This segmentation allows each passage to be optimized independently for its specific function while reducing interference and resistance in the overall system.
2Productivity
If the diameter dimension of the downstream side oil passage is increased to reduce resistance, then the discharge capacity is improved, but the sealing between passages becomes more difficult to ensure
Solution Approach 1:
The sealing solution utilizes the vertical height dimension by positioning the opening parts at different heights. The seal part formed by the inner circumferential surface of the insertion hole effectively seals the offset openings, allowing larger passage diameters without compromising sealing reliability.
3Reliability
If the resistance of the oil passage on the discharge side is reduced to prevent operation pressure generation, then the hydraulic clutch performance is improved, but the conduit design becomes more complex
Solution Approach 1:
The conduit design utilizes three-dimensional offset positioning of passage openings at different locations and heights within the casing. This spatial arrangement reduces flow resistance and prevents operation pressure generation while maintaining a compact overall structure suitable for vehicle applications.
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 enhances the discharge capacity of the oil through the downstream side oil passage, preventing operation pressure in the hydraulic clutch and reducing the likelihood of issues like dragging, even at low temperatures.
Implementation Method 1
reducing the resistance (conduit resistance) of the downstream side oil passage (60)
Implementation Method 2
a pressure regulating valve (8) for pressure-regulating/controlled oil discharged from the oil pump (7)... after being pressure-regulated to the predetermined pressure in this pressure regulating valve
Implementation Method 3
an oil pump (7) which pumps up the oil from the oil strainer (66) and feeds it to the hydraulic clutch (5)
Data Source
AI summary
A hydraulic clutch device includes a pressure regulating valve located on a downstream side in an oil flowing direction, a casing housing the hydraulic clutch, an insertion hole holding at least a part of the pressure regulating valve, an upstream side oil passage having an opening part introducing the oil from the hydraulic clutch into the insertion hole, and a downstream side oil passage having another opening part discharge the oil from the other opening part to the downstream side of the insertion hole. A position of a first virtual line (L1) which passes through the center-of-gravity point of a cross section of the opening part of the upstream side oil passage and a position of a second virtual line (L2) which passes through the center-of-gravity point of a cross section of the insertion hole are arranged so as to be different from each other.