Hybrid Vehicle External Power Supply Engine Control
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Solution Overview
Problem
Hybrid vehicles face instability in external power supply during fuel supply due to sudden changes in air-fuel ratio and engine combustion state when the fuel supply port is opened, leading to potential engine rotation speed changes and combustion deterioration.
Innovation Solution
A hybrid vehicle configuration that prohibits the driving of the internal combustion engine during fuel supply for external power supply, using stored electric power from a power storage device to maintain stable external power supply, with a control device managing the fuel supply port's operation to prevent simultaneous fuel supply and engine driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the internal combustion engine is driven during external power supply, then electric power can be generated continuously, but fuel supply operations cause sudden air-fuel ratio changes that destabilize engine combustion and rotation speed
Solution Approach 1:
The control device detects fuel supply port opening operations in advance and prohibits engine driving before fuel supply actually occurs. This preliminary prohibition prevents the harmful interaction between fuel supply and engine operation, avoiding sudden air-fuel ratio changes and combustion instability while maintaining external power supply through the power storage device.
2Quantity of substance
If fuel supply is performed during external power supply, then the engine will not run out of fuel, but the fuel supply port opening causes vapor emission and air-fuel ratio fluctuations that deteriorate combustion
Solution Approach 1:
The invention separates the fuel supply operation from engine operation by prohibiting engine driving when the fuel supply port is opened. This extraction of the engine driving function during fuel supply eliminates the harmful interaction that causes vapor emission issues and air-fuel ratio fluctuations, allowing fuel supply to proceed without combustion deterioration.
3Reliability
If the engine is prohibited from driving during fuel supply, then combustion stability is maintained, but electric power generation from the power generator cannot be performed
Solution Approach 1:
The power storage device acts as an intermediary between the power generator and the external power supply system. When the engine is prohibited from driving during fuel supply, the power storage device supplies electric power to maintain external power supply operations, bridging the gap between engine prohibition and continuous power delivery.
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
Enables stable external power supply during fuel supply by preventing engine driving during fuel port operation, ensuring continuous power supply without fuel depletion and maintaining engine stability.
Implementation Method 1
a power generator configured to generate electric power using motive power of the internal combustion engine
Implementation Method 2
an internal combustion engine, a power generator configured to generate electric power using motive power of the internal combustion engine
Data Source
AI summary
A vehicle is configured to perform external power supply which supplies electric power to outside of the vehicle. The vehicle includes a battery, an engine, a first MG configured to generate electric power using motive power of the engine, a fuel supply port for supplying a fuel for the engine, and an ECU for controlling an external power supply operation. When fuel supply into the fuel supply port is performed during the external power supply, the ECU prohibits driving of the engine, and supplies electric power stored in the battery to the outside of the vehicle.