Hydraulic sensor diagnostic device
JP2026101058APending Publication Date: 2026-06-22TOYOTA JIDOSHA KK
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2024-12-10
- Publication Date
- 2026-06-22
AI Technical Summary
Technical Problem
Existing methods struggle to accurately detect abnormal fixation of hydraulic sensors when the pulsation amplitude of the output is small due to variations in oil pump capacity, passage shape, and engine operating state.
Method used
A hydraulic sensor diagnostic device that changes the target hydraulic pressure and detects abnormal fixation by measuring the output fluctuation after pressure change, determining a sticking abnormality if the fluctuation amount is less than a predetermined threshold.
Benefits of technology
Accurately detects abnormal sticking of hydraulic sensors, improving diagnostic accuracy regardless of oil pump capacity, passage shape, and engine state, and ensuring reliable engine oil supply.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026101058000001_ABST
Abstract
To provide a hydraulic sensor diagnostic device that can accurately detect abnormal sticking of hydraulic sensors. [Solution] The electronic control unit 21 detects a sticking abnormality in the hydraulic pressure sensor 20, which detects the hydraulic pressure of the main gallery 16 through which the engine oil discharged by the oil pump 11 flows. The electronic control unit 21 changes the target hydraulic pressure of the oil pump 11 on the condition that the fluctuation amplitude of the output of the hydraulic pressure sensor 20 remains small, and detects a sticking abnormality in the hydraulic pressure sensor 20 if the amount of fluctuation of the output of the hydraulic pressure sensor 20 after the change in target pressure is less than or equal to the amount of sticking abnormality.
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