Reversing Pump Hydraulic Circuit With 6/2 Valve for Drivetrain Cooling
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Solution Overview
Problem
Existing hydraulic arrangements for actuating hydraulic consumers and cooling/lubricating components in a drivetrain of a motor vehicle face challenges in achieving high operational reliability while minimizing production costs.
Innovation Solution
A hydraulic arrangement incorporating a reversing pump with 6/2-way valve that allows hydraulic medium conveyance in opposite directions, integrating an active valve device to manage actuator operations, cooling, and lubrication functions without separate pumps, using spring elements and pressure-limiting/non-return valves to optimize efficiency and prevent unintended fluid discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate coolant and/or lubricant pump is used, then cooling and lubrication functions are reliably provided, but device complexity and production costs increase
Solution Approach 1:
The reversing pump is designed to perform multiple functions: it acts as both a hydraulic pump for actuator operation and a coolant/lubricant pump for thermal management and lubrication. The pump's hydraulic circuit is configured with valve connections that enable it to convey hydraulic medium to different consumers (actuators, heat sources, lubrication points) by shifting between positions, eliminating the need for separate dedicated pumps.
Solution Approach 2:
The patent combines the cooling/lubrication pump function with the existing reversing pump used for hydraulic actuation. By integrating these functions into a single pump unit with a multi-position valve system, the design merges previously separate hydraulic circuits into one unified system, reducing component count while maintaining functional reliability.
2Ease of manufacture
If the reversing pump is used for both actuation and cooling/lubrication, then production costs are reduced, but operational restrictions occur during shifting operations
Solution Approach 1:
The valve device is designed as a dynamic 6/2-way shifting valve that can rapidly transition between different hydraulic circuit configurations. This dynamic switching capability allows the system to alternate between actuation mode and cooling/lubrication mode, adapting the hydraulic flow paths in real-time based on operational requirements, thereby minimizing operational restrictions during mode transitions.
Solution Approach 2:
The system operates in periodic cycles, alternating between actuation phases (where the valve directs hydraulic medium to actuators) and cooling/lubrication phases (where the valve directs medium to heat sources and lubrication points). This periodic switching, enabled by the reversible pump's ability to change conveying directions, allows both functions to be served sequentially with minimal interruption.
3Adaptability or versatility
If a 6/2-way valve is used to control hydraulic flow, then multiple functions are controlled with a single valve, but valve complexity increases
Solution Approach 1:
The 6/2-way valve is designed as a universal control element that manages all hydraulic flow distribution in the system. Its six connection points (two inlets from the reversible pump, four outlets to different consumers) enable it to route hydraulic medium to multiple different consumers (first actuator, second actuator, heat source, lubrication point) based on its shifting position, providing centralized control for all hydraulic functions.
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
Enables efficient actuation of hydraulic consumers, cooling, and lubrication with reduced operational restrictions and cost-effectiveness by utilizing a single reversing pump for multiple functions, ensuring reliable operation and easy installation of a prefabricated subassembly.
Implementation Method 1
a reversing pump (7), by means of which a hydraulic medium (8) can be conveyed in opposite conveying directions
Implementation Method 2
the first hydraulic actuator (13) can be operated with a hydraulic connection alone, since it is subjected to spring force by a spring element (30)
Data Source
AI summary
The disclosure relates to a hydraulic arrangement for actuating hydraulic consumers and for cooling heat sources and/or lubricating component parts, in particular within a drivetrain of a motor vehicle, comprising a reversing pump, by means of which a hydraulic medium can be conveyed in opposite conveying directions, and the reversing pump has a first pump connection and a second pump connection, the hydraulic arrangement comprising an active valve device, the active valve device configured as a 6/2-way valve.