Vehicle Power Generator Control for Engine Mileage
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Solution Overview
Problem
Conventional vehicle-power-generator control apparatuses lack real-time communication with external ECU for switching between magnetic-field current suppression control prohibition and cancellation, leading to insufficient gasoline mileage improvement for internal combustion engines.
Innovation Solution
A vehicle-power-generator control apparatus with a communicator, magnetic-field current controller, boost controller, rotation speed detector, and temperature sensor, enabling boost-on and boost-off control based on commands from the ECU and detected engine speed and temperature, allowing for real-time switching of magnetic-field current suppression control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If magnetic-field current suppression control is performed to reduce engine load and improve gasoline mileage, then energy efficiency is improved, but engine rotation speed stability deteriorates due to large torque fluctuations
Solution Approach 1:
The system dynamically changes the magnetic-field current suppression level based on engine rotation speed conditions. When rotation speed deviation exceeds a threshold, the suppression control is adjusted or canceled, allowing the system to optimize between energy efficiency and rotation speed stability by changing the control parameter (magnetic-field current suppression level) according to real-time operating conditions
Solution Approach 2:
The control apparatus incorporates feedback mechanisms that monitor engine rotation speed and adjust the magnetic-field current suppression control accordingly. When rotation speed fluctuation is detected, the system provides feedback to modify or cancel the suppression control, creating a closed-loop system that maintains rotation speed stability while preserving energy efficiency benefits during normal operation
2Stability of the object's composition
If voltage hysteresis is implemented with different setting voltages for prohibition and cancellation of magnetic-field current suppression control, then engine rotation speed stability is improved, but real-time control responsiveness deteriorates
Solution Approach 1:
The system transitions from a static voltage hysteresis control to a dynamic control strategy where the suppression level is continuously adjusted based on real-time engine rotation speed feedback. This dynamic approach allows the control parameters to change adaptively without fixed hysteresis thresholds, enabling both stability and rapid responsiveness to changing operating conditions
Solution Approach 2:
The control apparatus is designed to preemptively adjust magnetic-field current suppression levels before significant rotation speed deviations occur by monitoring engine operating conditions in real-time. This preliminary action allows the system to maintain stability proactively while responding quickly to anticipated changes, eliminating the delay inherent in reactive hysteresis-based switching
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 significant improvement in gasoline mileage by allowing real-time control of magnetic-field current suppression, stabilizing engine rotation speed and power generation, and enhancing power-source voltage recovery.
Implementation Method 1
there is performed magnetic-field current suppression control in which a magnetic-field current for a vehicle power generator to be driven by the internal combustion engine is suppressed so that the generation voltage of the vehicle power generator is suppressed
Data Source
AI summary
There is provided a vehicle-power-generator control apparatus that can largely raise the gasoline mileage of an internal combustion engine. The vehicle-power-generator control apparatus includes a boost control unit having a function of making a magnetic-field current control unit perform boost-on control or boost-off control, based on a command provided by an ECU through communication and a function of making the magnetic-field current control unit perform boost-on control or boost-off control, based on at least one of a rotation speed of an internal combustion engine and a temperature of a vehicle power generator.