Throttle Valve Conditioning Circuit Sealing
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Solution Overview
Problem
Existing throttle valves for internal combustion engines often suffer from porosity and micro-bubbles generated during high-temperature and high-pressure die casting, which can lead to fluid leakage and component contamination over time.
Innovation Solution
The throttle valve design features a valve body made of metal, with a conditioning circuit that includes a pipe of a different material, such as stainless steel, inserted and molded within the valve body during die casting, preventing fluid passage to the electric motor or external environment by ensuring proper sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the valve body is made by die casting at high temperature and pressure, then manufacturing efficiency and cost are improved, but porosity and micro-bubbles are generated in the valve body
Solution Approach 1:
The patent extracts and removes the harmful porosity and micro-bubbles from the valve body through a specific manufacturing process step, allowing the high-efficiency die casting method to be used while eliminating the resulting defects before final assembly
Solution Approach 2:
The patent performs a preliminary cleaning or treatment operation on the die-cast valve body to remove porosity and micro-bubbles before the throttle valve is assembled, preventing these defects from causing future leakage or contamination issues
2Strength
If the valve body is made as a monolithic metal structure, then structural strength and rigidity are improved, but detection of internal porosity becomes more difficult
Solution Approach 1:
The patent performs preliminary detection and removal of porosity through process control or treatment steps before final assembly, making the monolithic structure viable despite the detection difficulty
Data Source
AI summary
Throttle valve (1) for an internal combustion engine provided with a valve body (2); a tubular feeding duct (4) defined in the valve body (2); and an actuating device, which controls the rotation of the throttle plate (5) around the rotation axis (7) and comprises an electric motor (3); an actuating device conditioning circuit (17) defined in the valve body (2); the valve body (2) being entirely made of a first metal material and the circuit (17) having a conditioning pipe (19) made of a second metal material, wherein the valve body (2) is injection-overmoulded around the pipe (19).