Axle Generator Control During ABS Braking in Reefer Trailers
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Solution Overview
Problem
Transport refrigeration systems face challenges during anti-lock brake system (ABS) events, where sudden changes in torque or rotational velocity can damage electric generation devices due to excessive or erratic load variations, potentially leading to system instability and equipment damage.
Innovation Solution
An energy management system with an energy controller and electronic braking unit is integrated to modify the operation of the electric generation device by adjusting torque or rotational velocity during ABS events, using sensors to detect and manage these conditions, and performing control actions such as increasing, decreasing, or maintaining torque to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the electric generation device is activated to generate electrical power from the rotational energy of the wheel axle, then the energy storage device is charged and the refrigeration system is powered, but sudden changes in torque or rotational velocity during ABS events can damage the electric generation device
Solution Approach 1:
The energy management system acts as an intermediary between the electric generation device and the electronic braking unit. It receives signals from the electronic braking unit about ABS events and mediates the response by controlling the electric generation device to reduce torque or rotational velocity, preventing direct damage while maintaining system functionality
Solution Approach 2:
The energy management system implements a feedback mechanism where it continuously monitors signals from the electronic braking unit regarding ABS events. When an ABS event is detected, the system responds by adjusting the electric generation device operation in real-time, creating a closed-loop control system that prevents equipment damage
2Power
If the electric generation device operates at normal torque levels, then energy generation is efficient, but during ABS events excessive torque can cause equipment damage
Solution Approach 1:
The system dynamically adjusts the torque and rotational velocity of the electric generation device based on real-time operating conditions. During ABS events, the energy management system modifies the device operation to reduce torque levels, allowing the system to adapt its power output to prevent damage while maintaining efficiency during normal operation
Solution Approach 2:
The energy management system changes the operational parameters of the electric generation device in response to ABS events. By modifying torque and rotational velocity parameters based on signals from the electronic braking unit, the system prevents excessive torque conditions that could cause equipment damage
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 effectively mitigates the risks of equipment damage by stabilizing the electric generation device's operation during ABS events, ensuring continuous and safe operation of the transport refrigeration system.
Implementation Method 1
an electric generation device operably coupled to a wheel axle of the trailer system, the electric generation device configured to generate electrical power from the rotational energy of the wheel axle
Data Source
AI summary
System and method for operating a transport refrigeration system including: a trailer system including a vehicle connected to a transport container; an electric generation device operably coupled to a wheel axle of the trailer system, the electric generation device configured to generate electrical power from the rotational energy of the wheel axle to charge an energy storage device when the electric generation device is activated; an energy management system providing power to the transportation refrigeration unit of the trailer system, the energy management system including an energy controller in communication with at least one of the electric generation device, the energy storage device, an electronic braking unit; an anti-lock braking system including the electronic braking unit in communication with the energy controller, wherein at least one of the electronic braking unit and the energy controller is configured to modify the operation of the electric generation device.