Lifting Mechanism Control During Engine Idle-Stop
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Solution Overview
Problem
Existing vehicle systems face challenges in operating lifting mechanisms during engine idle-stop conditions, particularly when the battery state of charge is insufficient, and when the vehicle is parked on a slope, leading to delayed operation and potential vehicle movement.
Innovation Solution
The system coordinates engine idle-stop and restart events by shifting the transmission into park and engaging the electronic parking brake before operating the lifting mechanism, ensuring stable operation and reducing the reliance on battery power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the engine is shut down during idle-stop conditions, then fuel economy is improved, but the battery state of charge may be insufficient for operating the lifting mechanism
Solution Approach 1:
The system checks the battery state of charge before initiating engine idle-stop to ensure sufficient power is available for lifting mechanism operation. If the battery charge is insufficient, the engine idle-stop is prevented, ensuring the engine remains running to charge the battery adequately.
Solution Approach 2:
The control system continuously monitors battery state of charge and uses this feedback to determine whether engine idle-stop conditions should be applied. This closed-loop control ensures that idle-stop operations do not compromise the ability to operate the lifting mechanism.
2Speed
If the transmission is not shifted to park before operating the lifting mechanism, then operation speed is improved, but vehicle stability deteriorates due to potential vehicle movement
Solution Approach 1:
The system automatically shifts the transmission to park position before initiating lifting mechanism operation, ensuring vehicle stability is established in advance. This preliminary action prevents any risk of vehicle movement during the lifting operation.
3Loss of time
If the engine idle-stop is overridden to operate the lifting mechanism, then lifting mechanism operation timeliness is improved, but fuel economy deteriorates
Solution Approach 1:
The control system monitors lifting mechanism operation requests and uses this feedback to determine whether to override engine idle-stop. The system intelligently balances the need for timely lifting operation against fuel economy considerations.
Solution Approach 2:
The system changes the engine operation parameter from idle-stop to running state when lifting mechanism operation is requested, ensuring sufficient power availability while minimizing fuel consumption through intelligent control.
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 enables timely and efficient operation of the lifting mechanism, prioritizing its operation over engine start-stop events, reducing the risk of vehicle movement and improving fuel economy by utilizing engine power effectively.
Implementation Method 1
the battery state of charge (SOC) of a battery providing power to the lifting mechanism may not be sufficient for operating the lifting mechanism
Implementation Method 2
when the engine combustion is disabled, operation of the lifting mechanism may be requested
Data Source
AI summary
Methods and systems are provided for operation of a lifting mechanism coupled to a mobility service vehicle. In one example, a method may include, during an engine idle-stop, in response to a request for operation of a lifting mechanism used by mobility devices to access the vehicle, the transmission may be shifted to park, an electronic braking system may be enabled, and the engine may be restarted to provide power for operation of the lifting mechanism.