Hybrid Vehicle Torque Control for Fuel-Efficient Parallel Drive
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Solution Overview
Problem
Existing hybrid vehicle systems face challenges in balancing the driving forces of an engine and a motor to optimize fuel efficiency, particularly in parallel mode, leading to inefficient torque output and energy consumption.
Innovation Solution
A control device that adjusts engine and motor torques based on predefined thresholds and battery charge, optimizing fuel efficiency by using the engine drive torque and motor assist torque to maintain efficient fuel consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the engine output is increased to meet required torque demands, then the driving force is improved, but the fuel consumption rate deteriorates
Solution Approach 1:
The patent applies dynamics by making the engine output adjustable and variable based on real-time driving conditions. The engine output is dynamically changed according to the required torque and driving state, allowing the system to operate at optimal fuel efficiency points rather than maintaining fixed high output levels.
Solution Approach 2:
The patent changes the operating parameters of the engine by adjusting its output torque based on the required torque and current driving state. This parameter adjustment allows the engine to operate in high fuel efficiency regions while still meeting the vehicle's torque requirements through coordinated control with the motor.
2Power
If the engine operates at high torque output to meet required torque, then the driving performance is improved, but unnecessary energy consumption increases
Solution Approach 1:
The patent implements feedback control by continuously monitoring the required torque and current driving state, then adjusting the engine output accordingly. This feedback mechanism ensures the engine operates only at the necessary torque level, avoiding unnecessary energy consumption while maintaining required driving performance.
Solution Approach 2:
The system performs self-service by autonomously determining the optimal engine output based on real-time conditions without requiring external intervention. The control device automatically adjusts engine torque to match actual needs, eliminating waste and optimizing energy utilization.
3Use of energy by moving object
If the engine output is reduced to improve fuel efficiency, then the fuel consumption rate is improved, but the required torque cannot be met
Solution Approach 1:
The patent merges the output of the engine and motor to meet the required torque. When the engine operates at reduced output for fuel efficiency, the motor supplements the torque deficiency, ensuring the combined output satisfies the vehicle's torque requirements while maintaining overall fuel efficiency.
Solution Approach 2:
The motor serves multiple functions: it can provide torque independently when the engine output is insufficient, supplement the engine torque when both are operating, and recover energy through regenerative braking. This multi-functionality allows the engine to operate at fuel-efficient points while the motor ensures torque requirements are always met.
Data Source
AI summary
A device (108) for controlling a vehicle (100) that is capable of traveling in a parallel mode using engine drive torque provided by an engine (101) and motor assist torque provided by a motor (107), the control device comprising a control unit that causes the vehicle to travel using the engine drive torque and the motor assist torque when a requested drive torque exceeds a first threshold value, and the first threshold value being a value at which the fuel consumption rate of output from the engine becomes worse than the fuel consumption rate of the output from the motor and being set lower than the maximum torque that can be outputted by the engine.