Vehicle Controller Crankshaft Stop for Filter Regeneration Noise
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Solution Overview
Problem
Existing vehicle control systems generate noise and vibration during filter regeneration and firing processes due to the rotation of the internal combustion engine's crankshaft, which can be perceived by occupants, especially during deceleration.
Innovation Solution
A controller that executes a filter regeneration process by stopping fuel injection during crankshaft rotation when decelerating and a firing process after regeneration, ensuring the crankshaft stops rotating post-firing, thereby minimizing noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter regeneration process and firing process are executed during crankshaft rotation, then the particulate matter is effectively burned and the filter is regenerated, but noise and vibration are generated that can be perceived by vehicle occupants
Solution Approach 1:
The controller executes the filter regeneration process and firing process during crankshaft rotation when the engine is already operating, rather than attempting to stop the crankshaft first. This preliminary action of utilizing the existing rotational state allows the regeneration to occur while avoiding the additional noise and vibration that would result from crankshaft stopping and restarting operations
Solution Approach 2:
The invention converts the potential harm of engine operation (noise and vibration) into a benefit by timing the regeneration processes to occur during normal engine operation when the crankshaft is already rotating. The harmful effects are minimized because the engine is already running for propulsion, and the regeneration utilizes this existing operational state rather than creating additional operational disturbances
2Productivity
If the crankshaft continues rotating during filter regeneration and firing processes, then the internal combustion engine can maintain operational readiness, but intake and exhaust actions produce perceived noise and vibration
Solution Approach 1:
The controller dynamically adjusts the fuel injection and ignition timing during the filter regeneration process and firing process to optimize the combustion characteristics. By controlling the fuel injection amount and timing, the system maintains engine operational readiness while minimizing the intensity of intake and exhaust actions that produce noise and vibration
Solution Approach 2:
The invention changes operational parameters such as fuel injection timing, injection amount, and ignition timing during the regeneration processes. These parameter adjustments allow the engine to maintain operational readiness and continue rotating the crankshaft while reducing the harmful noise and vibration produced by intake and exhaust actions
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 solution effectively reduces noise and vibration by ensuring the crankshaft remains stationary post-firing, enhancing the driving experience by minimizing perceived engine noise and vibration during deceleration.
Implementation Method 1
a fuel injection valve that injects fuel into the cylinder
Implementation Method 2
an ignition plug that performs ignition in the cylinder... burn the particulate matter collected by the filter
Implementation Method 3
an exhaust passage through which exhaust flows from the cylinder
Implementation Method 4
a filter that collects particulate matter from the exhaust
Implementation Method 5
The battery is supplied with electric power from the motor-generator
Data Source
AI summary
A CPU is configured to executes a filter regeneration process, a firing process, and a stopping process. The CPU is configured to stop rotation of a crankshaft of an internal combustion engine mounted on a vehicle on the condition that the vehicle is decelerating after termination of the firing process in the stopping process.