Choke Valve Control via Temperature and Airflow Linkage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automatic choke systems for internal combustion engines fail to provide the optimal air-fuel mixture as they rely solely on temperature or running state, neglecting the varying optimal settings based on both conditions, leading to suboptimal performance.
Innovation Solution
A mechanical linkage system that controls the choke valve based on both temperature and running state, using a heat-responsive device and air vane to adjust the choke plate to multiple positions for optimal fuel-to-air ratios, ensuring optimal engine performance across different operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a temperature controlled mechanism is used to automatically adjust the choke valve, then ease of operation is improved, but manufacturing precision deteriorates because temperature alone does not provide the optimal setting for the choke valve
Solution Approach 1:
The control mechanism is segmented into two independent parts: a temperature-controlled mechanism and a running-state detection mechanism (air vane). Each mechanism independently controls the choke valve to a certain extent, allowing the system to benefit from both automatic temperature-based control and airflow-based control without requiring one complex mechanism to do everything
Solution Approach 2:
The patent combines two separate control mechanisms (temperature-controlled mechanism and air vane) into a unified choke valve control system. Both mechanisms work together on the same choke valve, merging their control functions to achieve superior overall control precision that neither mechanism could achieve alone
2Manufacturing precision
If the choke valve is adjusted manually, then manufacturing precision is improved, but ease of operation deteriorates
Solution Approach 1:
The system employs automatic control mechanisms that self-adjust the choke valve based on temperature and running state without requiring manual intervention. The temperature-controlled mechanism and air vane automatically detect conditions and adjust the choke valve accordingly, eliminating the need for manual operation while maintaining precise control
3Adaptability or versatility
If the choke valve is adjusted based on running state only, then adaptability is improved, but manufacturing precision deteriorates because running state alone does not provide the optimal setting
Solution Approach 1:
The control system is divided into two independent control pathways: one based on temperature and another based on running state (airflow). Each pathway contributes partially to the overall control, allowing the system to be adaptable to different conditions while maintaining precision through the combined effect of both controls
Solution Approach 2:
The choke valve control system is designed to be multi-functional, responding to both temperature changes and running state changes. This universal response capability allows the single control system to handle multiple operating scenarios (cold start, warm running, hot shutdown, restart) with appropriate precision for each condition
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
The system achieves optimal air-fuel mixture adjustments by considering both temperature and running state, improving engine starting and running efficiency by providing the correct fuel-to-air ratios for various engine states, enhancing performance and preventing issues like flooding or lean mixtures.
Implementation Method 1
a heat-responsive device and air vane to adjust the choke plate to multiple positions
Implementation Method 2
The running state may be detected by air flow directed out of the engine (e.g., from a flywheel and cooling air fan) and onto an air vane
Data Source
AI summary
An automatic starting system includes a choke or similar apparatus. The apparatus includes at least a choke plate, a choke arm, and a control arm. The choke plate is configured to control a ratio of fuel and air for an engine. The choke arm is fixedly coupled with the choke plate. The control arm adjustably coupled with the choke arm. The control arm and the choke arm cooperate to move the choke plate into multiple positions, which correspond to multiple ratios of fuel and air for the engine.