Hydraulic Pressure Control Unit Valve Fixation Diagnosis
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Solution Overview
Problem
Conventional methods for diagnosing the fixation of electromagnetic valves in vehicle behavior control systems, such as those in motorcycles, are inadequate as they rely on current value deviations which can be influenced by temperature and other factors, leading to inaccurate diagnoses.
Innovation Solution
A hydraulic pressure control unit with a controller that acquires and analyzes the current value behavior through the electromagnetic valve's coil, specifically looking for temporary reductions during current increase, to diagnose valve fixation independently of temperature and other variables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current value deviation from assumed value is used to diagnose electromagnetic valve fixation, then diagnosis can be performed, but diagnosis accuracy deteriorates due to temperature and other influencing factors
Solution Approach 1:
The invention extracts and monitors the specific behavior pattern of temporary current reduction during the current increase process, separating this diagnostic indicator from the overall current value which is influenced by temperature. By focusing only on the temporary reduction behavior rather than absolute current values, the diagnosis becomes independent of temperature and other environmental factors.
Solution Approach 2:
Instead of diagnosing fixation by checking if current value deviates from assumed value (conventional approach), the invention inverts the diagnostic logic by checking whether the current value exhibits temporary reduction behavior during current increase. This inverted approach - looking for the presence of temporary reduction rather than absence of deviation - provides temperature-independent diagnosis accuracy.
2Measurement precision
If current value monitoring is used to diagnose electromagnetic valve fixation, then diagnosis function is provided, but diagnosis precision deteriorates due to parameter variations
Solution Approach 1:
The invention extracts the specific diagnostic indicator of temporary current reduction behavior from the overall current characteristics, isolating this precise measurement from the temperature-sensitive absolute current values. This extraction enables high-precision fixation detection that is not affected by parameter variations.
Solution Approach 2:
The invention changes the diagnostic parameter from absolute current value (which varies with temperature) to the behavioral characteristic of temporary current reduction during current increase. This parameter transformation maintains measurement precision while eliminating sensitivity to temperature and other environmental variations.
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 accurate and reliable diagnosis of electromagnetic valve fixation without relying on temperature or other influencing parameters, enhancing the ability to notify drivers of valve issues and prompt necessary repairs.
Implementation Method 1
an electromagnetic valve that controls a hydraulic pressure generated by a hydraulic fluid... a coil of the electromagnetic valve... current value of a current flowing through a coil
Data Source
AI summary
The present disclosure obtains a hydraulic pressure control unit capable of appropriately diagnosing presence or absence of fixation of an electromagnetic valve. In the hydraulic pressure control unit according to the present disclosure, a controller includes: an acquisition section that acquires a current value of a current flowing through a coil of the electromagnetic valve in a hydraulic pressure control mechanism; and a diagnosis section that determines whether the current value has exhibited behavior of being temporarily reduced in a process in which the current value is increased at initiation of applying the current to the coil of the electromagnetic valve, so as to diagnose the presence or the absence of the fixation of the electromagnetic valve.