Method and system for engine oil level sensing

A technology of engine and oil level sensors, applied in the direction of engine level, engine speed, engine operating parameters, etc., can solve problems such as not easy to detect or distinguish, undetectable, engine deterioration, etc.

Pending Publication Date: 2020-12-15
FORD GLOBAL TECH LLC
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  • Abstract
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  • Claims
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Problems solved by technology

Therefore, if the oil level drops while the vehicle is in motion, the low oil level may not be detectable until the vehicle is stationary, by which time the sustained low engine oil level may have caused significant engine degradation
Additionally, because engine oil is constantly pumped throughout the engine, different pressures can cause different amounts of oil to become trapped in the cylinder head, which may not be easily detectable or distinguishable

Method used

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  • Method and system for engine oil level sensing
  • Method and system for engine oil level sensing
  • Method and system for engine oil level sensing

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Embodiment Construction

[0016] The following description relates to systems and methods for estimating an oil level in an engine system while the vehicle is running. can be estimated at figure 1 connected to the vehicle system figure 2 engine oil level in the engine system. Engine oil level sensing can be accomplished via a resistive wire probe, such as via image 3 The circuit is connected to the power supply. The engine controller can be configured to execute control routines such as Figure 4 An exemplary routine for sensing engine oil level when data related to vehicle dynamics meets selected criteria. Vehicle dynamics can be learned via vehicle lateral and longitudinal acceleration as well as engine speed and vehicle speed. exist Figure 5 to Figure 6 An example scenario of real-time engine oil level assessment during vehicle motion is shown at . exist Figure 7 An exemplary transfer function for relating sensor output to oil level is shown at .

[0017] figure 1 An exemplary vehicle ...

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Abstract

Methods and systems are provided for improving engine oil level sensing while a vehicle is moving. The output of a hot wire sensor partially immersed in an engine oil well is sampled during selected vehicle moving conditions when lateral and longitudinal acceleration is limited and the vehicle is driving in a straight line. A transfer function is used to correlate a rate of change in sensor output, sampled during the selected vehicle operating conditions, with engine oil level.

Description

technical field [0001] The present description generally relates to methods and systems for dynamically measuring engine oil level during vehicle operation. Background technique [0002] Engine oils are used to lubricate internal combustion engine components. The oil reduces friction and wear on moving parts such as at piston rings, piston rods, cylinder walls, crankcase and the like. The engine oil level can be monitored intermittently while the vehicle is stationary to avoid premature engine degradation. Specifically, an oil change is prescribed when the sensed engine oil level drops below a threshold. The desire to increase the time period between engine oil changes and the natural tendency of engines to burn engine oil and / or develop micro leaks has led to the increasing importance of monitoring engine oil levels. [0003] An example of an engine oil level sensor is shown in US 4,513,616 by Bezard et al. In it, a resistive wire probe (or "hot wire") is partially subm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01M11/12G01F23/22G01F23/24
CPCF01M11/12G01F23/22G01F23/246F01M2250/66F01M2250/60F16N2250/18F16N2230/00G01F23/804B60Y2200/92B60K6/24
Inventor 约翰·埃里克·罗林杰约书亚·休梅克凯伦·威拉德艾利森·威尔
Owner FORD GLOBAL TECH LLC
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