Engine Control Device Automatic Stop Inertia Traveling Verification
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Solution Overview
Problem
Conventional engine control devices cannot execute the automatic engine stop process in a decelerating state until the first automatic engine stop process has been executed in a vehicle stopped state, limiting fuel consumption reduction opportunities.
Innovation Solution
An engine control device with an initial engine start intention detection system that allows automatic engine stop during inertia traveling or decelerating states, even if the vehicle is not completely stopped, by detecting the driver's intention to start the engine and ensuring correct engine start execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional engine control device inhibits automatic engine stop process in decelerating state until first automatic engine stop is executed in vehicle stopped state, then reliability of automatic engine stop process is improved, but fuel consumption reduction opportunity is lost
Solution Approach 1:
The system performs preliminary verification of the automatic engine stop process during the initial vehicle stopped state before allowing decelerating state engine stops. This preliminary action ensures reliability is established beforehand, enabling subsequent fuel savings during deceleration without compromising system reliability.
Solution Approach 2:
The control device dynamically adjusts the permission status for automatic engine stop in decelerating states based on verification results from stopped state executions. The system transitions from a static inhibition mode to a dynamic permission mode after successful verification, optimizing both reliability and fuel efficiency.
2Reliability
If the conventional engine control device waits for vehicle to be completely stopped before executing automatic engine stop, then execution reliability is improved, but frequency of engine stop events is reduced
Solution Approach 1:
The system performs preliminary verification during the initial stopped state to ensure correct execution of automatic engine stop and restart processes. This preliminary action establishes confidence in system reliability before expanding engine stop opportunities to decelerating states, increasing frequency without sacrificing reliability.
Solution Approach 2:
The control device dynamically permits automatic engine stop in decelerating states after successful verification in stopped state. This dynamic adjustment enables the system to capture more fuel-saving opportunities while maintaining execution reliability through the preliminary verification mechanism.
3Reliability
If the conventional engine control device inhibits automatic engine stop in decelerating state, then unexpected malfunction is avoided, but fuel consumption reduction is limited
Solution Approach 1:
The system performs preliminary verification of the automatic engine stop and restart processes during the initial vehicle stopped state. This preliminary action identifies and prevents potential malfunctions before they occur in decelerating states, enabling safe expansion of engine stop opportunities to reduce fuel consumption.
Solution Approach 2:
The control device dynamically adjusts permission for automatic engine stop in decelerating states based on verification results. By transitioning from static inhibition to dynamic permission after successful verification, the system reduces fuel consumption while maintaining protection against unexpected malfunctions.
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
Increases the frequency of automatic engine stop events, reducing fuel consumption by enabling engine stop during deceleration or inertia traveling states, even before the vehicle is completely stopped.
Implementation Method 1
the engine start device turns a driving shaft of the internal combustion engine when receiving electric power so as to execute an engine start of the internal combustion engine
Data Source
AI summary
In an engine control device, an automatic engine stop control section automatically stops an engine operating when an automatic engine stop condition is satisfied. An engine start control section supplies electric power to a starter to drive the starter when receiving an initial engine start intention signal transmitted from a push starter and when an automatic engine start condition has been satisfied. An engine start completion detection section detects whether the engine start of the engine has finished. An automatic engine stop permission section permits the automatic engine stop control section to stop the engine operating when the automatic engine stop permission section detects that the engine start has finished at a timing when the engine start control section has started the engine after receiving an initial engine start intention detection signal transmitted from the push starter.