Vehicle Coolant Temperature Correction via Reference Adjustment
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Solution Overview
Problem
Existing coolant temperature measurement systems in vehicles with internal combustion engines have inaccuracies due to temperature sensor tolerances, which can lead to inefficient coolant flow regulation, potentially causing excessive heating and reducing engine and component lifespan.
Innovation Solution
A coolant control system that adjusts engine output and input coolant temperatures based on a reference temperature, determined by averaging multiple measured temperatures, to improve the accuracy of temperature differences and enhance coolant flow regulation, thereby preventing excessive heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensor tolerances are used for coolant temperature measurement, then the measurement system is simple, but the measurement precision deteriorates
Solution Approach 1:
The patent introduces a reference temperature value as an intermediary to correct the measured coolant temperature. Instead of directly using the sensor reading, the system retrieves a reference temperature from a lookup table based on engine operating conditions (RPM, load, ambient temperature) and uses this reference as a correction基准 to improve measurement accuracy.
Solution Approach 2:
The patent changes the measurement approach by not relying solely on the raw sensor signal, but by transforming it through correction based on operating parameters. The system uses engine RPM, load conditions, and ambient temperature as parameters to select appropriate reference temperatures from lookup tables, thereby adapting the temperature measurement to varying operating conditions.
2Reliability
If coolant flow regulation is simplified, then the control system is easier to operate, but the reliability deteriorates due to potential excessive heating
Solution Approach 1:
The patent implements a feedback mechanism where the corrected coolant temperature is continuously monitored and compared against target temperature ranges. The engine control module adjusts coolant flow regulation based on this feedback, ensuring the temperature remains within optimal bounds. This closed-loop control improves reliability by preventing excessive heating while maintaining manageable operation through automated adjustment.
Solution Approach 2:
The system performs self-regulation of coolant temperature through automated control. The engine control module independently adjusts coolant flow based on the corrected temperature measurements and predetermined criteria, without requiring manual intervention. This self-service approach ensures reliable temperature management while keeping the operation simple for the user.
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 increases the accuracy of coolant flow regulation, preventing coolant temperatures from exceeding predetermined levels, which helps in maintaining engine and component longevity by optimizing heat management.
Implementation Method 1
The radiator transfers heat from the engine coolant to air passing the radiator
Implementation Method 2
The radiator transfers heat from the engine coolant to air passing the radiator
Implementation Method 3
The engine coolant absorbs heat from the engine and carries the heat to the radiator
Data Source
AI summary
A coolant control system of a vehicle includes an adjusting module that: (i) receives an engine output coolant temperature measured at a coolant output of an internal combustion engine; (ii) adjusts the engine output coolant temperature based on a reference temperature to produce a first adjusted coolant temperature; (iii) receives an engine input coolant temperature measured at a coolant input of the internal combustion engine; and (iv) adjusts the engine input coolant temperature based on the reference temperature to produce a second adjusted coolant temperature. The coolant control system also includes a difference module that determines a difference between the first and second adjusted coolant temperatures. The coolant control system also includes a pump control module that controls a coolant output of a coolant pump based on the difference between the first and second adjusted coolant temperatures.