Engine Intake Deposit Estimation and Cleaning Control
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Solution Overview
Problem
Existing engine control systems lack accuracy in estimating the amount of deposits in intake systems, leading to inadequate timing for cleaning modes, which can affect engine operation due to varying conditions such as temperature and substance attachment.
Innovation Solution
An engine control apparatus with a generation source calculator, deposit calculator, and mode controller that calculates the attached generation source and deposit amounts based on intake system temperature, executing a cleaning mode when the deposit amount exceeds a threshold, thereby improving the accuracy of deposit estimation and timing of cleaning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cleaning mode is executed based on simple deposit estimation, then the cleaning operation can be performed, but the timing and accuracy of deposit estimation are insufficient
Solution Approach 1:
The deposit estimation process is segmented into two distinct stages: attachment stage (calculating attached generation source amount) and carbonization/oxidation stage (calculating attached deposit amount). This segmentation allows each stage to be modeled separately with appropriate parameters, improving estimation accuracy while keeping the calculation manageable through modular processing.
Solution Approach 2:
The system performs preliminary calculation of the attached generation source amount before calculating the final deposit amount. By first determining how much generation source has attached to the intake system components, the system establishes a baseline that is then transformed into deposit estimates, enabling more accurate timing of cleaning operations.
2Adaptability or versatility
If cleaning mode is executed at fixed intervals, then the cleaning operation is simple to control, but it cannot adapt to varying deposit accumulation conditions
Solution Approach 1:
The system continuously monitors intake system temperature and calculates both attached generation source amount and attached deposit amount in real-time. This feedback mechanism allows the cleaning mode timing to adapt dynamically to actual deposit accumulation conditions, executing cleaning operations when the calculated deposit amount indicates necessity rather than following a fixed schedule.
Solution Approach 2:
The cleaning control system transitions from static fixed-interval scheduling to dynamic condition-based timing. By continuously updating the attached deposit amount calculation based on current temperature and generation source attachment rates, the system adapts cleaning timing to match actual deposit accumulation velocity, which varies with operating conditions.
Data Source
AI summary
An engine control apparatus controls includes a cleaning mode to clean a deposit generated in an intake system of an engine. The engine control apparatus includes a generation source calculator, a deposit calculator, and a mode controller. The generation source calculator is configured to calculate an attached generation source amount on the basis of a temperature of the intake system. The attached generation source amount is an amount of a generation source, of the deposit, attached to the intake system. The deposit calculator is configured to calculate an attached deposit amount that is an amount of the deposit attached to the intake system, on the basis of the attached generation source amount and the temperature of the intake system. The mode controller is configured to execute the cleaning mode, when the attached deposit amount is greater than an execution threshold.