Coolant Switching Valve Core Positioning With Stop-Limit Structure
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Solution Overview
Problem
Existing valve devices for coolant flow-path switching in hybrid and electric vehicles face challenges in achieving accurate positioning of the valve core assembly, which affects control accuracy and reliability.
Innovation Solution
The valve device incorporates a position-limiting portion in the valve core assembly and a stop portion in the housing, allowing the position-limiting portion to abut against the stop portion and limit further movement when the valve core assembly reaches a predetermined position, thereby establishing a reference position for improved control accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gear reduction mechanism is used to drive the valve core assembly, then the valve core assembly can be driven to rotate, but the positioning accuracy of the valve core assembly deteriorates
Solution Approach 1:
A position-limiting portion is introduced as an intermediary element between the valve core assembly and the housing. This position-limiting portion abuts against a stop portion on the housing to provide precise positioning reference, resolving the positioning inaccuracy caused by the gear reduction mechanism while maintaining the rotation capability.
2Adaptability or versatility
If the valve core assembly is allowed to rotate freely, then the flow path switching function is achieved, but the control accuracy deteriorates due to lack of precise positioning reference
Solution Approach 1:
The positioning function is segmented from the rotation function. The position-limiting portion provides discrete positioning references at specific angular positions, allowing the valve core assembly to rotate freely for flow path switching while maintaining precise control accuracy through the abutting position limit.
Data Source
AI summary
Disclosed is a valve device, comprising a housing and a valve element assembly, wherein the housing is provided with a mounting cavity, part of the valve element assembly is located in the mounting cavity, the housing comprises a bottom portion and a side portion, a plurality of connector portions are formed on the side portion, the valve element assembly is provided with a communicating cavity, which is laterally open, the connector portions are in communication with each other by means of the communicating cavity, the valve element assembly is provided with a limiting portion, and the housing is provided with a stop portion.