Engine Oil Temperature Control for Mixed Fuel Vaporization
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Solution Overview
Problem
Conventional engine control devices fail to accurately set a target engine oil temperature for fuels like gasoline and gas-liquid mixture fuels, leading to excessive or insufficient heating, which deteriorates fuel consumption and lubrication performance regeneration due to the lack of a single boiling point and changing fuel properties.
Innovation Solution
An engine control device that adjusts oil temperature based on detected fuel properties, increasing the temperature when the fuel does not easily vaporize and decreasing it when the fuel easily vaporizes, thereby optimizing fuel consumption and lubrication performance regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed target oil temperature is used for heating, then the heating control is simple, but excessive or insufficient heating occurs due to varying fuel properties, deteriorating fuel consumption and lubrication performance
Solution Approach 1:
The patent implements dynamic adjustment of the target oil temperature based on detected fuel properties. Instead of using a fixed temperature value, the control device dynamically changes the target temperature according to the vaporization characteristics of the fuel being used, allowing the heating control to adapt to different fuel types and conditions while maintaining optimal lubrication performance and fuel efficiency
Solution Approach 2:
The patent changes the target temperature parameter based on fuel property detection results. When fuel properties such as vaporization temperature are detected, the control device adjusts the target oil temperature parameter accordingly, ensuring that the heating process matches the specific fuel characteristics and prevents both excessive and insufficient heating scenarios
2Reliability
If oil temperature is increased to prevent oil dilution, then lubrication performance is improved, but fuel consumption increases due to excessive heating
Solution Approach 1:
The patent employs feedback control by detecting fuel properties and using this information to adjust the target oil temperature. The control device continuously monitors fuel characteristics and adjusts the heating target accordingly, creating a closed-loop system that prevents both excessive heating (which wastes fuel) and insufficient heating (which compromises lubrication performance)
3Use of energy by moving object
If oil temperature is decreased to save fuel, then fuel consumption is reduced, but lubrication performance deteriorates due to insufficient heating
Solution Approach 1:
The patent adjusts the target temperature parameter based on detected fuel properties. When fuel with higher vaporization temperature is detected, the target oil temperature is increased to ensure proper vaporization and prevent oil dilution. When fuel with lower vaporization temperature is detected, the target temperature is reduced, saving fuel while maintaining adequate lubrication performance
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 device effectively prevents excessive or insufficient heating by dynamically adjusting oil temperature according to fuel properties, improving both fuel efficiency and lubrication performance in engines using mixed fuels.
Implementation Method 1
a heater which operates when an oil temperature in the lubricant reservoir is at a predetermined temperature or lower and heats the lubricant stored in the chamber
Implementation Method 2
the oil heating unit heats and regenerates the engine oil diluted by the fuel
Data Source
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AI summary
By means of the present invention it is possible to set a target value for the engine oil temperature appropriately in an engine that uses gasoline as a fuel, even when the fuel does not have a single boiling point because the gasoline is a mixed composition, or when the fuel property changes (for example, when the vaporization property changes due to deterioration). In other words, the present invention provides an engine control device that prevents excessive heating or insufficient heating by changing the oil temperature to the high side in a condition wherein the fuel being used does not easily vaporize, and changing the oil temperature to the low side in a condition wherein the fuel being used easily vaporizes. This engine control device has: an oil temperature control means that controls the temperature of oil lubricating the interior of the engine; a fuel supply device that supplies fuel to the engine; and a means for detecting the property of the fuel. The temperature of the oil is controlled on the basis of a signal from the means for detecting the property of the fuel.