Power Take-Off Idle Speed Control for Fuel and Engine Wear
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Solution Overview
Problem
Commercial vehicles often operate at engine idle conditions for extended periods, leading to increased fuel consumption and reduced engine life due to differences in engine efficiency when the transmission is engaged in park or neutral versus forward or reverse gear.
Innovation Solution
A method for adjusting engine rotational speed via a controller when a power take-off is engaged, based on the actual time at idle conditions exceeding a threshold and engine efficiency deviating from a predetermined level, to reduce fuel consumption and extend engine life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine operates at idle conditions for extended periods, then the vehicle can maintain readiness for operation, but fuel consumption increases and engine life is reduced
Solution Approach 1:
The system dynamically adjusts engine idle speed based on real-time monitoring of idle duration and efficiency parameters. When the engine exceeds a threshold idle time, the controller automatically reduces idle speed to optimize fuel consumption while maintaining vehicle readiness, thereby resolving the contradiction between reliability and energy use.
Solution Approach 2:
The system changes the engine operating parameter (idle speed) based on the idle time condition. By monitoring the actual total idle time and comparing it against a threshold, the controller adjusts the engine speed parameter to reduce fuel consumption during extended idle periods, thus addressing the fuel consumption issue while maintaining operational readiness.
2Reliability
If the engine operates at idle conditions for extended periods, then the vehicle can maintain readiness for operation, but engine life is reduced
Solution Approach 1:
The system dynamically adjusts engine idle speed based on real-time monitoring of idle duration and efficiency parameters. When the engine exceeds a threshold idle time, the controller automatically reduces idle speed to optimize fuel consumption while maintaining vehicle readiness, thereby resolving the contradiction between reliability and energy use.
Solution Approach 2:
The system converts the potentially harmful effect of extended idle operation into a benefit by implementing adaptive idle speed control. By reducing idle speed after a threshold time, the system transforms the harmful fuel consumption and engine wear into an optimized operating state that maintains readiness while extending engine life.
3Use of energy by moving object
If the engine speed is reduced to lower fuel consumption, then fuel efficiency improves, but engine efficiency may deviate from optimal levels
Solution Approach 1:
The system employs feedback control by continuously monitoring engine efficiency parameters and comparing them against predetermined thresholds. When engine efficiency deviates beyond the threshold after idle time exceeds the threshold, the controller adjusts engine speed to restore optimal efficiency, thereby resolving the contradiction between fuel efficiency and engine performance reliability.
Solution Approach 2:
The system changes the engine operating parameter (idle speed) based on the idle time condition. By monitoring the actual total idle time and comparing it against a threshold, the controller adjusts the engine speed parameter to reduce fuel consumption during extended idle periods, thus addressing the fuel consumption issue while maintaining operational readiness.
Data Source
AI summary
Methods and systems for operating a vehicle powertrain that includes a power take-off are presented. In one non-limiting example, engine speed may be adjusted to increase engine efficiency during conditions when the engine is operating at idle conditions for longer than a threshold amount of time so that fuel consumption and wear may be reduced.