Fuel Accumulator Cutout Delay Adaptation
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Solution Overview
Problem
Existing methods for measuring fuel delivery by fuel injectors in internal combustion engines are inefficient and intrusive, leading to undesirable variations in engine output and emissions due to dimensional variations and wear, and often result in discarding valuable data if the fuel flow is stopped at the wrong time.
Innovation Solution
A system and method that includes a fuel accumulator, sensor, and control system to determine the fuel flow cutout delay by analyzing pressure signals, allowing for optimal timing of fuel flow termination and maximizing data acquisition points, thereby reducing system intrusion and improving data efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fuel flow is stopped to measure fuel delivery, then measurement capability is improved, but engine performance varies and emissions increase
Solution Approach 1:
The system pre-determines the fuel flow cutout delay period through analysis of pressure signals before actual fuel delivery measurement. By establishing the delay characteristics in advance, the system can optimize the timing of fuel flow termination to minimize disruption to engine operation while still capturing accurate measurement data during the predetermined delay window.
2Device complexity
If fuel flow is stopped at the wrong time, then data acquisition is simplified, but valuable data is discarded
Solution Approach 1:
The system continuously monitors fuel pressure signals during the fuel flow cutout event and uses this feedback to dynamically determine the actual termination of fuel flow. The control system adjusts data acquisition timing based on real-time pressure signal analysis, ensuring that measurements are captured during the actual fuel delivery period rather than using fixed predetermined timing, thereby preventing data loss while managing system complexity.
3Ease of operation
If fixed timing is used for fuel flow cutout, then control is simplified, but measurement accuracy decreases due to variable delay
Solution Approach 1:
The system transitions from fixed predetermined timing to dynamic timing adjustment based on actual fuel pressure signal analysis. By continuously adapting the fuel flow cutout timing according to real-time pressure measurements and calculated delay periods, the system maintains measurement accuracy despite variations in injector characteristics, temperature changes, and wear, while keeping control implementation manageable through automated signal processing.
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 allows for precise determination of the fuel flow cutout delay, optimizing data collection and reducing unwanted variations in engine performance and emissions by ensuring accurate measurement of fuel delivery, thus enhancing the efficiency and reliability of fuel injection systems.
Implementation Method 1
The sensor is adapted to detect a fuel pressure in the fuel accumulator and to transmit a pressure signal indicative of the fuel pressure in the fuel accumulator
Implementation Method 2
determining an actual termination of the fuel flow to the accumulator by analyzing the fuel pressure
Data Source
AI summary
A system and method for is provided to determine a fuel flow cutout delay between transmitting a signal to stop a fuel flow to a fuel accumulator of a fuel system and the actual stop of fuel flow to the fuel accumulator. The fuel flow cutout delay is used to determine when pressure data from a sensor associated with the fuel accumulator is unaffected by fuel flow to the fuel accumulator.