Injection Control Device Charge Noise Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing injection control devices for internal combustion engines face challenges in maintaining accurate fuel injection due to charge noise generated during boosting control, which deteriorates current monitoring accuracy, leading to variations in injection amount, increased exhaust emissions, and fuel consumption, and prohibiting boosting control temporarily reduces chargeable time per cycle.
Innovation Solution
An injection control device that includes a booster circuit, a boosting control unit, a charge control setting unit to set a charge prohibition time, and a maximum time specification unit to determine the maximum valve-closing detection time, allowing the booster circuit to be charged only outside this time to enhance injection accuracy and ensure sufficient chargeable time without requiring a high-speed charger circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If boosting control is prohibited for a certain time to avoid charge noise, then valve-closing detection accuracy is improved, but chargeable time per cycle is reduced
Solution Approach 1:
The charge prohibition time is made variable rather than fixed. The control device dynamically adjusts the charge prohibition time based on the detected valve-closing detection time, allowing the system to adapt to different operating conditions and optimize both detection accuracy and chargeable time for each engine cycle.
Solution Approach 2:
The system uses the detected valve-closing detection time as feedback to determine the appropriate charge prohibition time. By monitoring the actual valve closing behavior and using this information to set the charge prohibition duration, the system ensures accurate detection while maximizing the time available for charging the booster circuit.
2Reliability
If a fixed charge prohibition time is used, then valve-closing detection learning is protected from charge noise, but chargeable time is insufficient
Solution Approach 1:
The charge prohibition time is dynamically adjusted based on actual valve-closing detection results rather than using a fixed predetermined value. This allows the system to maintain reliable detection learning while optimizing chargeable time according to real-time operating conditions.
Solution Approach 2:
The system changes the parameter of charge prohibition time based on the detected valve-closing detection time. By adjusting this temporal parameter dynamically, the system achieves both reliable detection learning and sufficient chargeable time without requiring a high-speed charger circuit.
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 configuration effectively improves injection accuracy by learning the valve-closing detection time and ensures adequate chargeable time, eliminating the need for a high-speed charger circuit, thus reducing circuit size and cost while maintaining accurate fuel injection.
Implementation Method 1
a booster circuit for boosting a battery voltage to be a reference power supply voltage of a power supply circuit and a boosting control unit for boosting and controlling the booster circuit
Data Source
AI summary
An injection control device includes: a booster circuit that boosts a battery voltage; a boosting control unit that performs boosting control on the booster circuit; a charge control setting unit that sets a charge prohibition time of the booster circuit for the boosting control unit; and a maximum time specification unit that specifies a maximum valve-closing detection time based on a valve-closing detection time.