Hybrid Vehicle Control Module Efficiency Priority Mode
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Solution Overview
Problem
Hybrid vehicles lack effective control methods to prioritize energy efficiency during mode selection, leading to suboptimal energy usage and potential efficiency losses in both internal combustion engines and motors.
Innovation Solution
A hybrid vehicle system with an efficiency priority mode selection switch, a driving force demand setting module, and a control module that adjusts the operation points of the internal combustion engine and motor to optimize energy efficiency by reducing motor power output when the efficiency priority mode is selected, while maintaining engine efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the motor outputs higher power to ensure driving performance, then the driving power is sufficient, but the electric power consumption and energy losses increase
Solution Approach 1:
The patent implements dynamic mode switching between normal mode and efficiency priority mode based on driving conditions. The control module dynamically adjusts motor output power and engine operation points according to the selected mode, enabling the system to adapt between performance-oriented and energy-efficient operating states, thereby resolving the contradiction between maintaining sufficient driving power and reducing electric power consumption.
Solution Approach 2:
The patent changes operational parameters (motor power output, engine operation point) based on the selected driving mode. In efficiency priority mode, the motor outputs lower power compared to normal mode, while the engine operates at optimized points. This parameter adjustment allows the system to reduce electric power consumption and energy losses while maintaining acceptable driving performance.
2Use of energy by moving object
If the motor outputs lower power to improve energy efficiency, then the electric power consumption decreases, but the driving power becomes insufficient
Solution Approach 1:
The patent combines the power output from both the internal combustion engine and the motor to ensure sufficient total driving power. In efficiency priority mode, when the motor outputs lower power, the engine compensates by operating at optimized operation points to provide the necessary power, thereby maintaining sufficient overall driving power while reducing electric power consumption.
Solution Approach 2:
The control module dynamically balances the power contribution from the engine and motor based on the selected mode. In efficiency priority mode, the system dynamically adjusts the power distribution to optimize energy efficiency while ensuring the combined power output remains sufficient for driving requirements.
3Use of energy by moving object
If the engine operation point is adjusted to optimize efficiency, then the energy efficiency improves, but the driving force demand may not be met
Solution Approach 1:
The patent employs feedback control where the control module continuously monitors the driving force demand and adjusts the engine operation point and motor power output accordingly. In efficiency priority mode, the system feedback-adjusts the engine to operate at optimized points while the motor compensates to meet the driving force demand, ensuring both energy efficiency and sufficient driving power are achieved.
Solution Approach 2:
The patent merges the power contributions from the engine and motor to meet the total driving force demand. When the engine operates at optimized efficiency points in efficiency priority mode, the motor provides supplemental power to ensure the combined output satisfies the driving force requirements, thereby resolving the contradiction between engine efficiency optimization and driving force sufficiency.
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
Improves energy efficiency by reducing electric power consumption and losses in the motor, while preventing a decrease in internal combustion engine efficiency by maintaining a consistent target operation point, thus enhancing overall vehicle performance.
Implementation Method 1
an accumulator capable of supplying and receiving electric power from the motor
Data Source
AI summary
In a hybrid vehicle 20, an engine 22, motors MG1 and MG2 are controlled so that the engine 22 is operated at a target operation point set at Step 120 based on a torque demand Tr* and the motor MG2 outputs lower power for driving in comparison with a turn-off condition of an ECO switch 88 when the ECO switch 88 is turned on upon driving with power from both the engine 22 and the motor MG2 (Steps S130-S150 and S170-S200).