Engine Controller Ambient Temperature Parameter Adjustment
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Solution Overview
Problem
Internal combustion engines face performance variations due to diurnal changes in ambient temperature, leading to inefficiencies in power output and fuel consumption, as existing systems are not adequately designed to handle extreme temperature conditions.
Innovation Solution
A system and method that involve an engine controller obtaining ambient environmental conditions and adjusting engine operating parameters, such as intake air pressure and fuel delivery, based on a pre-calibrated engine map to optimize performance across a range of temperatures, including extreme conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If engine operating parameters are determined based solely on throttle level using a standard engine operating map, then the system is simple and easy to operate, but engine performance deteriorates under extreme ambient temperature conditions
Solution Approach 1:
The system changes the operating parameters by introducing ambient temperature as an additional parameter to determine engine operating parameters. Instead of using only throttle level, the controller now considers both throttle level and ambient temperature to select appropriate parameters from the engine operating map, ensuring reliable performance across varying temperature conditions while maintaining operational simplicity
Solution Approach 2:
The system makes the engine operating parameters dynamic by allowing them to change based on ambient temperature conditions. The controller dynamically adjusts parameters such as fuel injection quantity, air intake, and ignition timing according to the measured ambient temperature, enabling the engine to adapt to extreme temperature variations while maintaining optimal performance
2Productivity
If engine operating parameters are adjusted for extreme temperature conditions, then engine performance and fuel efficiency improve, but the device complexity increases
Solution Approach 1:
The system implements feedback by continuously monitoring ambient temperature through sensors and using this information to adjust engine operating parameters. The controller receives feedback from temperature sensors and automatically modifies fuel injection, air intake, and ignition timing parameters to maintain optimal engine performance under varying ambient conditions
Solution Approach 2:
The system achieves universality by using a single engine operating map that contains pre-calculated operating parameters for multiple ambient temperature conditions. This multi-functional approach allows the same control system to handle various temperature scenarios without requiring separate control systems or complex additional hardware
3Device complexity
If the engine operates without environmental condition adjustments, then the device complexity remains low, but fuel consumption and emissions increase
Solution Approach 1:
The system changes the operating parameters by introducing ambient temperature as an additional parameter to determine engine operating parameters. Instead of using only throttle level, the controller now considers both throttle level and ambient temperature to select appropriate parameters from the engine operating map, ensuring reliable performance across varying temperature conditions while maintaining operational simplicity
Solution Approach 2:
The system enables self-service by automatically adjusting engine operating parameters based on ambient temperature without requiring manual intervention. The controller autonomously monitors temperature conditions and modifies fuel injection, air intake, and ignition timing parameters to optimize fuel efficiency and reduce emissions under varying environmental conditions
Data Source
AI summary
Systems and methods for operating an engine and controlling engine parameters over a range of ambient temperature conditions are provided. A method for an engine includes selecting one or more of an engine speed, an engine load, a base timing, and a fuel common rail pressure from a pre-calibrated engine map corresponding to a selected throttle level and modifying the one or more of the engine speed, the engine load, the base timing, and the fuel common rail pressure based on sensed environmental conditions.