Rotary Slide Coolant Circuit for Engine Temperature Control
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Solution Overview
Problem
Existing coolant circuits for internal combustion engines are complex and rigid in structure, leading to inefficient control of sub-circuits, which restricts the precision and speed of coolant temperature adjustment, affecting the engine's ability to reach optimal operating temperature.
Innovation Solution
A coolant circuit with a primary cooling circuit and heating circuit, utilizing a rotary actuator with two rotatably supported slides that control coolant flow through infinitely variable flow paths, allowing precise control of multiple sub-circuits, including a heating circuit and oil cooler circuit, with the second slide configured for simple operation and cost-efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single adjustment member is used to control multiple outlets in a control valve, then the device complexity is reduced, but the manufacturing precision and reliability deteriorate due to wear and tightness problems
Solution Approach 1:
The control valve is divided into multiple independent adjustment members (first adjustment member for first outlet, second adjustment member for second outlet, etc.). Each adjustment member independently controls a specific outlet, eliminating the wear and tightness problems associated with a single complex adjustment member while maintaining device functionality.
2Device complexity
If a rotary valve with predetermined flow paths is used, then the device complexity is reduced, but the adaptability deteriorates because positional changes are required frequently
Solution Approach 1:
The invention replaces fixed predetermined flow paths with dynamically adjustable flow paths. Each adjustment member can be independently positioned to control the opening degree of corresponding outlets, allowing continuous adaptation to changing coolant requirements without rigid positional sequences.
3Device complexity
If multiple outlets are controlled by one adjustment member, then the device complexity is reduced, but the manufacturing precision deteriorates due to the rigid predefined sequence
Solution Approach 1:
By segmenting the control function across multiple independent adjustment members, each member can precisely control its designated outlet without compromise from the rigid sequencing requirements of a single adjustment member. This segmentation enables precise temperature control for each sub-circuit independently.
4Adaptability or versatility
If a control valve with many functions is implemented, then the device complexity increases requiring multiple components, but the ease of operation deteriorates due to frequent rotation requirements
Solution Approach 1:
The control functions are segmented across multiple independent adjustment members, where each member controls a specific outlet. This segmentation simplifies operation because each adjustment member only needs to control one outlet rather than sequentially rotating through multiple positions to control multiple outlets.
Data Source
AI summary
Coolant circuit, in particular a coolant circuit having a plurality of sub-circuits 1, 2, 3 of an internal combustion engine 11 includes a primary cooling circuit 1 and a heating circuit 2 as well as a coolant delivery pump 5 disposed on a rotary actuator 4, with the rotary actuator 4 having a rotary-slide housing 20 with several ports 8a, 8b, 9a, 9b, 10a through which coolant can flow, and a first and at least one second rotary slide 6 and 7 which are rotatably supported in the rotary-slide housing 20 and have each at least one rotary-slide pass-through opening 8, 9, 10 forming a flow path, wherein the ports 8a, 8b, 9a, 9b, 10a can be brought into at least partial coincidence with the rotary-slide pass-through openings 8, 9, 10 by a rotary motion of the respective rotary slide 6 and/or 7), wherein a first branch 1a of the primary cooling circuit 1 leads from the internal combustion engine 11 via a main radiator 12 to a main radiator port 8b of the first rotary slide and can be controlled by the first rotary slide 6, and that a second branch 1b of the primary cooling circuit 1 leads from an outlet 21 of the coolant delivery pump 5 to the internal combustion engine 11 and can be controlled by the second rotary slide 7.