A method and apparatus for controlling oil pressure in a non-road diesel engine

By controlling the oil pressure of non-road diesel engines in real time through the ECU, the lubrication system problem caused by oil flow redundancy is solved, precise oil pressure management is achieved, engine life is extended and thermal efficiency is improved.

CN121345647BActive Publication Date: 2026-07-21LUOYANG TRACTORS RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LUOYANG TRACTORS RES INST
Filing Date
2025-09-24
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

The existing oil flow design of non-road diesel engines has redundancy, which leads to excessive pressure in the lubrication system, causing reliability problems such as oil cooler bulging and filter failure, and reducing overall thermal efficiency.

Method used

A non-road diesel engine oil pressure control method is adopted, which obtains multi-dimensional parameters in real time through the ECU, and divides them into low temperature, normal temperature and high temperature modes. Combined with engine speed, power and cumulative running time, the target oil pressure is calculated, and the duty cycle is adjusted by the electronic oil pump to achieve precise control.

Benefits of technology

It improves the precision of oil pressure control, avoids lubrication failure and system overpressure, extends the engine overhaul cycle, improves thermal efficiency and electrification level, and simplifies the lubrication system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to a non-road diesel engine oil pressure control method and device, which comprises the following steps: acquiring the engine oil temperature, engine speed, engine power, engine oil pressure and engine cumulative running time; determining the engine oil pressure control mode according to the engine oil temperature, wherein the engine oil pressure control mode comprises a low-temperature mode, a normal-temperature mode and a high-temperature mode; in the normal-temperature mode, the target engine oil pressure is calculated based on the engine speed, engine power, engine oil pressure and engine cumulative running time; and the duty cycle of the electronic oil pump is adjusted according to the difference between the target engine oil pressure and the current engine oil pressure to control the engine oil pressure. By acquiring the multi-dimensional parameters such as the engine oil temperature, engine speed, load and cumulative running time in real time and distinguishing the three control modes of low temperature, normal temperature and high temperature, the precision and working condition adaptability of the engine oil pressure control are remarkably improved, and the lubrication failure or system overpressure caused by the sudden change of the engine oil temperature or extreme working conditions is effectively avoided.
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