Hybrid Vehicle GPF Regeneration Control for Driver Comfort
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Solution Overview
Problem
In series hybrid vehicles, the regeneration of the Gasoline Particulate Filter (GPF) can disrupt driver comfort due to increased engine noise and vibration when the engine is driven unintentionally to raise the filter's temperature for regeneration.
Innovation Solution
A control method for hybrid vehicles that drives the engine to raise the GPF temperature only when a predetermined amount of particulate matter is accumulated and the temperature is below a certain threshold, while prohibiting engine drive when the driver does not intend to do so, thus maintaining comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine is driven to raise the GPF temperature for regeneration, then the particulate matter can be burned off effectively, but the driver comfort deteriorates due to increased noise and vibration
Solution Approach 1:
The control device checks whether the driver intends to drive the engine before initiating GPF regeneration. By performing this preliminary check, the system ensures that regeneration only occurs when the driver is already aware of and accepting of engine operation, thus preventing unexpected noise and vibration while maintaining effective PM burning when appropriate
2Use of energy by moving object
If the engine is driven to charge the battery when power amount is low, then the battery can be recharged, but the driving sound becomes louder than the motor
Solution Approach 1:
Before initiating engine-driven battery charging, the control device determines whether the driver intends to drive the engine. This preliminary assessment allows the system to plan energy management strategies that align with driver expectations, reducing unexpected acoustic disturbances while maintaining necessary battery charging functionality
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 method effectively regenerates the GPF without impairing driver comfort by ensuring the engine is only driven intentionally for regeneration, thereby reducing unwanted noise and vibration.
Implementation Method 1
a generator configured to charge a battery by using power of an engine
Implementation Method 2
an electric motor configured to drive a driving wheel by electric power of the battery
Implementation Method 3
a particulate filter configured to collect particulate matter contained in exhaust gas from the engine
Implementation Method 4
the engine is driven to raise a temperature of the particulate filter when a first temperature rise condition is satisfied
Data Source
AI summary
A control method for a hybrid vehicle is provided. The hybrid vehicle includes: a generator configured to charge a battery by using power of an engine; an electric motor configured to drive a driving wheel by electric power of the battery; and a particulate filter configured to collect particulate matter contained in exhaust gas from the engine. In the control method, the engine is driven to raise a temperature of the particulate filter when a first temperature rise condition is satisfied in which a first predetermined amount or more of the particulate matter is accumulated in the particulate filter and the temperature of the particulate filter is equal to or lower than a predetermined temperature. Drive of the engine is prohibited, when a predetermined first condition that a driver does not intend to drive the engine is satisfied.