Adaptive Critical Temperature Control for Gasoline Vapor Bubble Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for preventing vapor bubble formation in gasoline engines often require unnecessary countermeasures due to a constant critical temperature selection, which does not account for the varying composition of gasoline used, leading to increased fuel and CO2 consumption.
Innovation Solution
A method to determine the critical temperature for preventing vapor bubble formation based on the density of the gasoline and stoichiometric air demand, using various mathematical functions such as linear, polynomial, and sectionally defined functions, allowing for a more precise and adaptive approach to countermeasure implementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant critical temperature is selected to prevent vapor bubble formation for all gasoline compositions, then vapor bubble prevention is ensured, but unnecessary countermeasures are taken leading to increased fuel consumption and CO2 emissions
Solution Approach 1:
The patent applies dynamics by transitioning from a static, fixed critical temperature value to a dynamic determination method. The critical temperature is now calculated in real-time based on actual gasoline properties (density and stoichiometric air demand) and operating conditions, allowing the system to adapt the temperature threshold dynamically to match the specific gasoline composition being used, thereby eliminating unnecessary countermeasures.
Solution Approach 2:
The patent implements parameter changes by using density and stoichiometric air demand as variable parameters to determine the critical temperature. Instead of using a constant temperature value, the system calculates the critical temperature based on these changing parameters that reflect the actual gasoline composition, enabling precise adaptation of vapor bubble prevention measures to the specific fuel being used.
2Reliability
If a constant critical temperature is selected to prevent vapor bubble formation, then vapor bubble prevention is ensured, but the system complexity increases due to unnecessary countermeasures
Solution Approach 1:
The patent uses parameter changes by determining the critical temperature based on measurable properties of the gasoline (density and stoichiometric air demand) rather than using a fixed constant value. This allows the system to adapt to different gasoline compositions dynamically, preventing vapor bubbles effectively while avoiding the need for complex unnecessary countermeasures that would be required with a constant temperature approach.
3Measurement precision
If the critical temperature is determined based on density and stoichiometric air demand, then the precision of vapor bubble prevention is improved, but the calculation complexity increases
Solution Approach 1:
The patent replaces complex mechanical or empirical determination methods with a mathematical calculation approach. By using density and stoichiometric air demand parameters in a calculated relationship to determine the critical temperature, the system achieves precise adaptation to gasoline composition without requiring complex physical measurement systems or empirical trial-and-error methods.
Data Source
AI summary
A method for operating a vehicle having a gasoline engine includes determining a density of a gasoline to be combusted in the gasoline engine, determining a stoichiometric air demand, determining a critical temperature from the density of the gasoline to be combusted and the stoichiometric air demand, and adapting countermeasures to prevent vapor bubbles based on the determined critical temperature.