Portable Cylinder Leakage Tester with Electronic Sensor and Microcontroller
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Solution Overview
Problem
Existing portable testers for automobile engine cylinder leakage rates require manual adjustment of pressure regulating valves, have limited overload resistance, and complex operation steps, leading to potential damage from pressure fluctuations and drops.
Innovation Solution
A portable tester with a single chip microcomputer unit, sensors, and a simplified design that eliminates the need for a pressure regulating valve, allowing for automatic calculation and display of leakage rates through a user-friendly interface and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure regulating valve is used to protect the pointer pressure gauge, then the gauge is protected from overload damage, but the device complexity increases and the operation becomes more complex
Solution Approach 1:
The patent removes the pressure regulating valve from the instrument system entirely. Instead of using a mechanical valve to protect the gauge, the system uses electronic pressure sensors that can withstand direct connection to the compressed air source without requiring intermediate protection devices. This extraction of the pressure regulating valve simplifies the overall system structure while maintaining gauge protection through the robustness of the electronic sensing system.
Solution Approach 2:
The patent replaces the mechanical pointer pressure gauge system with an electronic pressure sensor system. The electronic sensors eliminate the need for mechanical protection components like pressure regulating valves, as they can directly interface with the compressed air source and provide digital readings without the fragility of mechanical moving parts.
2Measurement precision
If manual adjustment of the pressure regulating valve is performed repeatedly, then stable gauge readings are obtained, but the productivity decreases and time is lost
Solution Approach 1:
The patent implements an automatic detection system where the controller automatically controls the solenoid valve to regulate compressed air supply to the test cylinder. The system self-regulates the pressure without requiring manual intervention, automatically calculates the leakage rate based on sensor readings, and displays results. This eliminates the need for operators to manually adjust pressure regulating valves repeatedly, significantly improving detection efficiency while maintaining measurement precision.
Solution Approach 2:
The system uses pressure sensors to continuously monitor the pressure in the test cylinder and provides feedback to the controller. The controller processes this feedback information and automatically adjusts the solenoid valve to maintain proper pressure conditions, enabling stable and accurate readings without manual intervention.
3Measurement precision
If strict limits on pressure fluctuation range are imposed, then stable readings are obtained, but the adaptability decreases
Solution Approach 1:
The automatic detection system with electronic pressure sensors and controller can adapt to various compressed air sources with different pressure characteristics. The system automatically regulates the air supply through the solenoid valve based on real-time sensor feedback, allowing it to work stably with different air sources without requiring strict control of the source pressure fluctuations.
Solution Approach 2:
The system dynamically adjusts operational parameters such as the opening duration and timing of the solenoid valve based on the actual pressure conditions detected by the sensors. This parameter adjustment capability allows the system to maintain stable and accurate leakage rate measurements even when the compressed air source pressure varies within a wide range.
4Measurement precision
If manual operation steps are followed strictly, then accurate detection is achieved, but the ease of operation decreases
Solution Approach 1:
The system performs automatic detection where the controller automatically controls the solenoid valve, monitors pressure changes through sensors, calculates the leakage rate, and displays results. The operator only needs to connect the device and press a start button, eliminating the need to follow complex manual operation steps while maintaining detection accuracy through automated control and calculation processes.
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
Simplifies the detection process, improves efficiency, reduces product cost, and enhances impact resistance, making it easier to compare cylinder performance with better resistance to drops and overloads.
Implementation Method 1
Both ends of the manifold body are provided with sensors which are electrically connected with the single chip microcomputer unit
Data Source
AI summary
It is provided a portable tester for leakage rate of a cylinder of an automobile engine. The portable tester includes a shell; wherein a circuit board and a manifold body are provided in the shell; a throttle hole is provided inside the manifold body, the shell includes a front shell and a rear shell; a display and a control key are provided respectively at an upper end of and at a middle part of the front shell; the circuit board is provided with a decoding drive electrically connected with the display, and a single chip microcomputer unit is provided on the decoding drive and electrically connected with the control key; an air inlet connecter and an air outlet connector are provided at the lower end of the front shell. Two ends of the manifold body are provided with sensors electrically connected with the single chip microcomputer unit.