Engine ECU Split Controller for Fast Fuel Injection Boost
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Solution Overview
Problem
The delay in achieving drive voltages for fuel injection apparatuses in internal combustion engines due to prolonged initialization times of electronic control units (ECUs) hinders the timely operation of fuel injection systems, especially as ECU performance and functionality increase.
Innovation Solution
A control apparatus comprising a booster and two controllers, where the first controller with a shorter initialization time initiates the boost operation at engine start-up, and the second controller with a longer initialization time takes over after start-up completion, utilizing a diode rectification and synchronous rectification boost circuit to efficiently manage voltage and reduce heat loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ECU performance and number of functions are improved, then the control capability is enhanced, but the initialization time after boot is prolonged
Solution Approach 1:
The ECU is divided into two separate controllers: a first controller that handles only the boost control function with fast initialization, and a second controller that handles other engine control functions. This segmentation allows the boost control to be initialized quickly without waiting for the entire ECU to boot up, resolving the contradiction between enhanced functionality and initialization time.
2Power
If the battery voltage is increased to achieve drive voltage, then the fuel injection apparatus can operate, but the initialization time is prolonged
Solution Approach 1:
The first controller is designed to perform the boost control initialization immediately at boot without waiting for the complete ECU initialization. This preliminary action ensures that the drive voltage is established quickly for fuel injection operation, overcoming the delay caused by full ECU initialization.
3Device complexity
If a single controller is used for all functions, then the device complexity is reduced, but the initialization time increases
Solution Approach 1:
The control system is segmented into two controllers with distinct responsibilities. The first controller is dedicated solely to boost control, allowing it to initialize rapidly. The second controller handles other engine management functions. This segmentation prioritizes quick initialization of critical functions while maintaining overall system functionality.
Solution Approach 2:
The system dynamically switches control from the first controller to the second controller after initialization is complete. This dynamic transition allows the system to operate with fast initialization initially, then transfer to the more comprehensive second controller, optimizing both speed and 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
This approach enables earlier initiation of fuel injection, reduces start-up time, and ensures efficient and accurate control of fuel injection, minimizing delays and heat loss during engine operation.
Implementation Method 1
a battery 13 and a booster unit 14 configured to increase an output voltage from the battery 13 to a drive voltage for a fuel injection unit 4
Implementation Method 2
a diode rectification and synchronous rectification boost circuit
Implementation Method 3
a diode rectification and synchronous rectification boost circuit
Data Source
AI summary
A control apparatus for an internal combustion engine includes a booster, a first controller, and a second controller. The booster is configured to increase an output voltage of a battery to a drive voltage of a fuel injection unit of the internal combustion engine. The first controller has a first initialization time after boot of the first controller. The first controller is configured to control the booster to increase the output voltage to the drive voltage at start-up of the internal combustion engine. The second controller has a second initialization time after boot of the second controller. The second initialization time is longer than the first initialization time of the first controller. The second controller is configured to control the booster to increase the output voltage to the drive voltage after the start-up of the internal combustion engine is completed.