Engine Cooling Valve Flow Control for Rapid Warm-Up
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Solution Overview
Problem
Conventional cooling systems for internal combustion engines slow down the temperature increase of cooling water, leading to increased engine friction and reduced fuel efficiency, due to heat removal by the heat exchanger for air heating.
Innovation Solution
A cooling system with a flow channel switching valve that controls the distribution of cooling water between multiple channels, including a heater line, block line, and transmission line, to accelerate the temperature increase of cooling water by restricting the cooling water distribution rate of the heater line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the heater line is opened to provide air heating, then air heating function is improved, but the temperature increase of cooling water slows down
Solution Approach 1:
The patent applies dynamics by making the cooling water distribution rate to the heater line variable rather than fixed. The control device dynamically adjusts the distribution rate based on engine operating conditions (temperature, load, acceleration), allowing the system to optimize between air heating performance and cooling water temperature increase rate under different conditions.
Solution Approach 2:
The patent changes the parameter of cooling water distribution rate to the heater line based on engine operating conditions. By adjusting this parameter dynamically, the system can restrict heat removal from cooling water when rapid temperature increase is needed, while still providing adequate air heating when conditions permit.
2Ease of operation
If the heater line removes heat from cooling water, then air heating is improved, but engine friction increases and fuel efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts the cooling water distribution rate to the heater line based on real-time engine conditions including temperature, load, and acceleration. This allows the system to minimize unnecessary heat removal that would increase friction and reduce fuel efficiency, while still providing required air heating.
Solution Approach 2:
The control device uses feedback from temperature sensors, load sensors, and acceleration signals to continuously monitor engine state and adjust the heater line distribution rate accordingly. This feedback mechanism ensures that heat removal is optimized to maintain fuel efficiency while achieving heating objectives.
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
This solution accelerates the temperature increase of cooling water, reducing engine friction and improving fuel efficiency by managing the flow of cooling water through the engine's various channels.
Implementation Method 1
the heater line for air heating
Implementation Method 2
the transmission line for an oil warmer of a transmission
Data Source
AI summary
The present invention provides a cooling system for an internal combustion engine, comprising: a flow channel switching valve for switching between a plurality of cooling water channels at least including a heater line for air heating, a block line for cooling an engine block, and a transmission line for an oil warmer of a transmission so as to sequentially open at least one of the plurality of cooling water channels in accordance with a warm-up state of the internal combustion engine; and a control device for controlling opening and closing of the flow channel switching valve so as to restrict a cooling water distribution rate of the heater line. The cooling system allows acceleration of cooling water temperature recovery from a temporary drop.