Engine Idle-Stop Control via Generator Status Detection
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Solution Overview
Problem
Existing vehicle engine idle stop systems often disrupt power take-off operations by unnecessarily delaying engine shut-down, which can lead to power shortages and inefficiencies, and lack operator control over idle-stop timing.
Innovation Solution
A method that allows users to schedule engine idle-stop based on input via a human machine interface, enabling continued engine operation during generator use for external loads, with options to override idle-stop until the generator stops or for a specified duration, ensuring uninterrupted power supply and improved fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the engine is idle-stopped after completion of the first PTO operation, then fuel efficiency is improved, but subsequent PTO operations are disrupted
Solution Approach 1:
The system performs preliminary detection of generator operation status before executing engine idle-stop. When the generator is detected to be operating, the system preemptively prevents engine idle-stop, ensuring continuous power supply for successive PTO operations while still enabling idle-stop when the generator is not operating, thus maintaining fuel efficiency
2Loss of energy
If the engine is idle-stopped to improve fuel efficiency, then energy loss is reduced, but operator control over idle-stop timing is lost
Solution Approach 1:
The system dynamically adjusts engine idle-stop execution based on real-time generator operation status. The control system continuously monitors whether the generator is operating and automatically modifies idle-stop behavior accordingly - preventing idle-stop during generator operation and allowing it when the generator is not operating, thereby adapting to changing operational conditions
Solution Approach 2:
The system implements feedback by detecting the generator operation status and using this information to control engine idle-stop. The control system receives feedback about whether the generator is running and adjusts the engine idle-stop decision based on this feedback, ensuring both fuel efficiency and operational control
3Reliability
If the engine idle-stop is delayed indefinitely for PTO operation, then PTO operation continuity is maintained, but fuel efficiency is compromised
Solution Approach 1:
The system performs preliminary detection of generator operation status before executing engine idle-stop. When the generator is detected to be operating, the system preemptively prevents engine idle-stop, ensuring continuous power supply for successive PTO operations while still enabling idle-stop when the generator is not operating, thus maintaining fuel efficiency
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 approach allows for continuous operation of power take-off devices without interruptions, enhances customer satisfaction by providing operator control over idle-stop timing, and improves fuel efficiency by allowing engine operation only when necessary.
Implementation Method 1
the generator is operated to convert mechanical energy (from engine torque) to electrical energy for charging the battery
Data Source
AI summary
Methods and systems are provided for adjusting engine idle-stop based on operation of an on-board generator. In one example, during operation of the generator to power an external load, a method may include inhibiting engine shut-down based on input from a user.