Hybrid Drive Torque Management for Energy Storage Recharge
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Solution Overview
Problem
Motor vehicles with hybrid motorization and multiple driving wheels face complex energy management challenges due to independent traction mechanisms, leading to increased energy consumption during braking control steps.
Innovation Solution
A method that manages energy recharging by prohibiting exceeding a shedding torque value through the sum of torques from multiple driving sources, controlling overall torque distribution between wheels, detecting excessive recharging torque, and limiting torque generation to prevent energy consumption during braking, while allowing load shedding or priority recharging based on energy thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the sum of torques from multiple driving sources exceeds the shedding torque value during braking control, then recharging of the energy storage device is achieved, but energy consumption by the first driving source increases unnecessarily
Solution Approach 1:
The control method dynamically adjusts the torque parameter of the first driving source based on the braking control instruction and energy storage state. When a braking control instruction is detected, the system changes the torque parameter from a recharging-oriented value to a limited value that prevents excessive energy consumption, while still allowing the second driving source to contribute to recharging.
Solution Approach 2:
The system implements dynamic torque distribution where the torque from the first driving source is made variable rather than fixed. The control unit continuously monitors the braking control instruction and adjusts the first driving source's torque output in real-time, switching between different torque levels based on whether recharging is needed and whether the current torque would cause excessive energy consumption.
2Use of energy by moving object
If the torque of the first driving source is limited during braking control, then energy consumption is reduced, but the ability to execute primary torque instructions is compromised
Solution Approach 1:
The control method segments the torque generation function between multiple driving sources. When a braking control instruction is detected, the system divides the torque execution responsibility: the first driving source's torque is limited to prevent excessive energy consumption, while the second driving source compensates to ensure the primary torque instruction is still executed reliably.
Solution Approach 2:
The system implements multi-functionality where the second driving source serves dual purposes: it can independently execute primary torque instructions when needed, and it can also contribute to recharging the energy storage device during braking control. This universality ensures that limiting the first driving source's torque does not compromise overall system reliability.
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 method effectively manages energy recharging in vehicles with multiple driving wheels, reducing energy consumption by the first driving source during braking and ensuring efficient recharging while maintaining primary torque instructions.
Implementation Method 1
a first non-thermal drive source (102) coupled to the internal combustion engine (101) and to at least one first wheel (103) of the motor vehicle (100), as well as a second non-thermal drive source (104) coupled to at least one second wheel (106)
Implementation Method 2
the first non-thermal drive source (102) and the second non-thermal drive source (104) each being capable of exchanging energy with said energy storage unit (107)
Data Source
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Figure 3~4
Figure 5
AI summary
A method for managing the recharging of an energy storage device of a motor vehicle comprising a heat engine, a first non-heat drive source coupled to the heat engine and to a first wheel, and a second non-heat drive source coupled to a second wheel, the first and second drive sources each being capable of exchanging energy with said energy storage device, the management method comprising a step of preventing the exceeding of a so-called load-shedding torque value (Vd) for recharging the storage device by the first and second drive sources, a step of controlling braking distributed between the first and second wheels, a step of detecting an exceeding of the load-shedding value by the second drive source and, in response to said detection step, a step of limiting the first drive source and allowing the exceeding of the load-shedding recharge torque value for recharging the storage device.