Hybrid Vehicle Drivability Control for Heating Stability
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Solution Overview
Problem
In hybrid motor vehicles, the intermittent operation of the heat engine disrupts the heating system, leading to reduced comfort and increased fuel consumption due to temperature fluctuations, which existing control systems fail to address effectively.
Innovation Solution
A control system that measures driving conditions, battery charge levels, and heating system operation to optimize traction mode by adjusting the activation signals for the internal combustion engine and electric motor, incorporating sensors and calculation means with comparators and correctors to manage battery charge and heating water temperature, ensuring efficient energy use and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the heat engine operates intermittently to recharge the battery, then the battery charge level is improved, but the heating system temperature stability deteriorates
Solution Approach 1:
The control system continuously monitors the heating water temperature and uses this feedback to adjust the heat engine operation. When temperature drops below a threshold, the system activates the heat engine to restore heating, creating a closed-loop control that balances battery charging needs with heating stability requirements
Solution Approach 2:
The system dynamically adjusts the heat engine operating mode based on real-time conditions. It can operate in different modes (continuous operation, intermittent operation, or shutdown) depending on the heating water temperature, battery charge level, and driving conditions, optimizing the balance between battery recharging and heating maintenance
2Productivity
If the heat engine runs continuously to maintain heating, then the heating system efficiency is improved, but the fuel consumption increases
Solution Approach 1:
Instead of continuous operation, the heat engine operates periodically based on heating water temperature thresholds. The system allows the temperature to drop to a lower threshold before activating the heat engine, creating a periodic operation pattern that reduces overall runtime and fuel consumption while maintaining acceptable heating performance
Solution Approach 2:
The control system changes operational parameters dynamically by adjusting the activation thresholds and operating modes of the heat engine based on battery charge level, driving conditions, and heating requirements. This allows optimization of the balance between heating efficiency and fuel consumption under different operating scenarios
3Quantity of substance
If the electric motor operates as a generator during deceleration, then the battery charge level is improved, but the heating system operation is disturbed
Solution Approach 1:
The control system acts as an intermediary that coordinates the electric motor's generator operation with the heating system requirements. It monitors both battery charge needs and heating water temperature, and only allows generator operation when heating temperature is sufficient, preventing harmful interference between regenerative braking and heating maintenance
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 enhances heating system efficiency, reduces fuel consumption, and improves driver comfort by optimizing traction mode based on real-time data from driving conditions, battery charge, and heating system operation.
Implementation Method 1
a heating system with an air heater transferring the heat given off by the heat engine to a volume of heating water
Implementation Method 2
the electric motor operates in engine braking, that is to say like a generator so as to recharge the battery of the vehicle
Data Source
Figure 1~2
Figure 3
AI summary
The system (1) for controlling the drivability mode of a hybrid motor vehicle (2) equipped with a heat engine (6) and an electric motor (4), comprises: first measurement means (8) of the vehicle's driving conditions, second measurement means (9) of the level of battery charge (3) of the vehicle, first control means (12) of the heat engine (6), second control means (13) of the electrical motor (4), and calculation means (11), able to send a first activation signal (ACT1) from the heat engine (6) and a second activation signal (ACT2) from the electric motor (4), as a function of the driving conditions and the charge level (MES2). The system further comprises third measurement means (10) for measuring at least one characteristic relating to the operation of the vehicle heating system (7). The first activation signal (ACT1) and the second activation signal (ACT2) are compiled from the characteristic relating to the operation of the heating system.