Vehicle Cluster Oil Pressure Switch Disconnection Detection
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Solution Overview
Problem
Current vehicle cluster systems fail to reliably detect oil pressure switch (OPS) disconnection, leading to inadequate warning of low oil pressure, which can result in engine damage due to human errors during assembly, such as connector disconnection or signal line breakage.
Innovation Solution
An apparatus and method that include an oil pressure switch (OPS), a driving information detection unit, an OPS connection determination unit, and a control unit to compare waveform voltages before and after engine start, determining OPS connection status and controlling a warning lamp to indicate disconnection, thereby preventing false negatives in oil pressure monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oil pressure switch (OPS) connector is disconnected during assembly, then the system structure remains simple, but the reliability of oil pressure monitoring is lost
Solution Approach 1:
The system performs preliminary detection of OPS signal status before engine start by comparing the signal level with a reference voltage. This preliminary action identifies connector disconnection or signal line breakage before the engine operates, allowing the system to prepare appropriate warning responses and prevent false monitoring readings.
Solution Approach 2:
The system continuously monitors the OPS signal and provides feedback through warning lamps on the cluster. When abnormal OPS status is detected (such as connector disconnection), the system activates specific warning indicators to inform the driver, creating a closed-loop feedback mechanism that enhances monitoring reliability without adding complex hardware.
2Measurement precision
If the warning lamp is turned on during ignition-on state before engine start, then the driver is warned of potential issues, but false warnings occur when OPS connector is disconnected
Solution Approach 1:
The system performs preliminary detection of OPS signal status before engine start by comparing the signal level with a reference voltage. This preliminary action identifies connector disconnection or signal line breakage before the engine operates, allowing the system to prepare appropriate warning responses and prevent false monitoring readings.
Solution Approach 2:
The system dynamically adjusts warning lamp behavior based on engine state and OPS signal status. During ignition-on state before engine start, the system evaluates OPS signal characteristics and only activates warnings when actual low oil pressure is detected, not when connector disconnection is present. This dynamic response eliminates false warnings while maintaining accurate monitoring.
Data Source
AI summary
An apparatus for controlling a cluster of a vehicle may include, an oil pressure switch (OPS) mounted at an oil passage of an engine, a driving information detection unit configured of receiving an oil pressure signal from the OPS through a connector of the OPS, an OPS connection determination unit configured of determining that the OPS is disconnected when a first waveform voltage determined from a first oil pressure signal detected before the engine is started is the same as a second waveform voltage determined from a second oil pressure signal detected after the engine is started, and a control unit configured of controlling the cluster to turn on a warning lamp in a response that the control unit receives disconnection event information related to the OPS.