Apparatus of controlling engine and method thereof

Patent metadata

Field	Value
Publication number	US-2025198361-A1
Application number	US-202418664651-A
Country	US
Kind code	A1
Filing date	May 15, 2024
Priority date	Dec 15, 2023
Publication date	Jun 19, 2025
Grant date	—

Abstract

An apparatus of controlling an engine includes a controller determining an inflow fuel amount adsorbed on an inner wall of a cylinder, and introduced into an oil pan based on the density of a combustion chamber and a post injection fuel amount, determining a vaporization fuel amount vaporized in the inflow fuel amount based on an operating condition of an engine, determining a consumption fuel amount consumed in the vaporization fuel amount based on the operating condition of the engine, and determining a dilution rate of the engine oil based on the inflow fuel amount, the vaporization fuel amount, and the consumption fuel amount; and a display providing an alarm to a driver when the dilution rate of the engine oil is equal to or more than a reference value.

First claim

1 . An apparatus for of controlling an engine, the apparatus comprising:
a controller configured to: determine an inflow fuel amount adsorbed on an inner wall of a cylinder, and introduced into an oil pan based on a density of a mixture within a combustion chamber and a post injection fuel amount; determine a vaporization fuel amount vaporized in the inflow fuel amount based on an operating condition of the engine; determine a consumption fuel amount consumed in the vaporization fuel amount based on the operating condition of the engine; and determine a dilution rate of engine oil based on the inflow fuel amount, the vaporization fuel amount, and the consumption fuel amount; and a display configured to provide an alarm to a driver when the dilution rate of the engine oil is equal to or more than a reference value; wherein the vaporization fuel amount is mapped based on an engine speed and an engine load.

2 . The apparatus of claim 1 , wherein the inflow fuel amount is mapped in advance according to the density of the combustion chamber and the post injection fuel amount.

3 . The apparatus of claim 2 , wherein the controller is configured to correct the inflow fuel amount by an injection pressure of the post injection fuel amount.

4 . The apparatus of claim 3 , wherein the controller is configured to:
increase the inflow fuel amount as the injection pressure of the fuel increases; and decrease the inflow fuel amount as the injection pressure of the fuel decreases.

5 . The apparatus of claim 2 , wherein the controller is configured to correct the inflow fuel amount by a cooling water temperature.

6 . The apparatus of claim 5 , wherein the controller is configured to increase the inflow fuel amount as the cooling water temperature decreases, and decrease the inflow fuel amount as the cooling water temperature increases.

7 . (canceled)

8 . The apparatus of claim 1 , wherein the consumption fuel amount is mapped based on an engine speed and an engine load.

9 . The apparatus of claim 8 , wherein the controller is configured to correct the consumption fuel amount by a temperature of the engine oil.

10 . The apparatus of claim 9 , wherein the controller is configured to:
increase the consumption fuel amount as the temperature of the engine oil increases; and decrease the consumption fuel amount as the temperature of the engine oil decreases.

11 . A method of controlling an engine, comprising:
determining, by a controller, an inflow fuel amount adsorbed on an inner wall of a cylinder, and introduced into an oil pan based on a density of a mixture within a combustion chamber and a post injection fuel amount; determining, by the controller, a vaporization fuel amount vaporized in the inflow fuel amount based on a vaporization level of engine oil; determining, by the controller, a consumption fuel amount consumed in the vaporization fuel amount based on an operating condition of the engine; determining, by the controller, a dilution rate of the engine oil based on the inflow fuel amount, the vaporized fuel amount, and the consumed fuel amount; and providing, on a display, an alarm to a driver in response to the dilution rate of the engine oil being equal to or more than a reference value; wherein the vaporization fuel amount is mapped based on an engine speed and an engine load.

12 . The method of claim 11 , wherein the inflow fuel amount is mapped in advance according to the density of the combustion chamber and the post injection fuel amount.

13 . The method of claim 12 , wherein the inflow fuel amount is corrected by an injection pressure of post injected fuel.

14 . The method of claim 13 , wherein the inflow fuel amount increases as the injection pressure of the fuel increases, and the inflow fuel amount decreases as the injection pressure of the fuel decreases.

15 . The method of claim 12 , wherein the inflow fuel amount is corrected by a cooling water temperature.

16 . The method of claim 15 , wherein the inflow fuel amount increases as the cooling water temperature decreases, and the inflow fuel amount decreases as the cooling water temperature increases.

17 . (canceled)

18 . The method of claim 11 , wherein the consumption fuel amount is mapped based on an engine speed and an engine load.

19 . The method of claim 18 , wherein the consumption fuel amount is corrected by a temperature of engine oil.

20 . The method of claim 19 , wherein the consumption fuel amount increases as the temperature of the engine oil increases, and the consumption fuel amount decreases as the temperature of the engine oil decreases.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Kim Minjae
• Choi Hee Yong

Classifications

• F02D2200/023

  Temperature of lubricating oil or working fluid · CPC title

• F02D2041/228

  Warning displays · CPC title

• F01M2011/14

  for indicating the necessity to change the oil · CPC title

• F02D41/405 Primary

  with post injections · CPC title

• F02D41/22

  Safety or indicating devices for abnormal conditions {(in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809)} · CPC title