Apparatus for controlling gasoline-diesel complex combustion engine and method for controlling gasoline-diesel complex combustion engine

Patent metadata

Field	Value
Publication number	US-10458345-B2
Application number	US-201615366888-A
Country	US
Kind code	B2
Filing date	Dec 1, 2016
Priority date	May 24, 2016
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

An apparatus for controlling a gasoline-diesel complex combustion engine includes an engine generating driving torque by burning gasoline fuel and diesel fuel, a driving information detector for detecting driving information of the engine, and a controller for controlling a diesel injector such that diesel fuel is injected as a single injection or a split injection based on a driving region and a knock intensity included within the driving information.

First claim

What is claimed is:

1. An apparatus for controlling a gasoline-diesel complex combustion engine, comprising:
an engine generating driving torque by burning gasoline fuel and diesel fuel;
a driving information detector for detecting driving information of the engine; and
a controller for controlling a diesel injector such that diesel fuel is selectively injected as a single injection and a split injection based on a driving region and a knock intensity included within the driving information after gasoline fuel is injected,
wherein the split injection includes a first main injection and a second main injection,
wherein the first main injection is injected at a predetermined first Before Top Dead Center Crank Angle (BTDC CA), and the second main injection is injected at a predetermined second BTDC CA, and
wherein the first BTDC CA increases as the driving region of the engine moves from a low-load region to a middle-load region.

2. The apparatus of claim 1 , wherein the controller controls:
the diesel fuel is injected as the single injection when the driving region is a low-speed region and a high-load region,
the diesel fuel is injected, as the single injection when the driving region is a high-speed region and the low-load or middle-load region and the knock intensity is less than a predetermined value, and
the diesel fuel is injected as the split injection when the driving region is the high-speed region and either the low-load or middle-load region, and the knock intensity is equal to or greater than the predetermined value.

3. The apparatus of claim 1 , wherein the controller determines a load region of the engine from a Brake Mean Effective Pressure (BMEP) and a diesel ratio, and the diesel ratio is a diesel fuel amount relative to the entire fuel amount.

4. The apparatus of claim 1 , wherein the controller calculates the knock intensity from a maximum combustion pressure, a maximum pressure rise rate and an engine speed detected by the driving information detector.

5. The apparatus of claim 4 , wherein the knock'intensity is calculated from an equation of:

RI
=

f
⁡

(

MPRR
,
RPM
,

P
max

)

=

2.88
×

10

-
8

×

(

MPRR
×
RPM

)

2

P
max

,

wherein MPRR denotes maximum pressure rise rate, RPM denotes engine speed, and Pmax denotes maximum combustion pressure.

6. A method for controlling gasoline-diesel complex combustion engine comprising:
by a driving information detector, detecting a driving information of an engine; and
by a controller, controlling that diesel fuel injected by a diesel injector is selectively injected as a single injection and a split injection based on a driving region and a knock intensity derived from the driving information after gasoline fuel is injected,
wherein the split injection includes a first main injection and a second main injection,
wherein the first main injection is injected at a predetermined first BTDC CA, and the second main injection is injected at a predetermined second BTDC CA, and
wherein the first BTDC CA increases as the driving region of the engine moves from a low-load region to a middle-load region.

7. The method of claim 6 , wherein the diesel fuel is injected as the single injection when the driving region is a low-speed region and a high-load region,
the diesel fuel is injected as the single injection when the driving region is a high-speed region and the low-load or middle-load region and the knock intensity is less than a predetermined value, and
the diesel fuel is injected as the split injection when the driving region is the high-speed region and the low-load or middle-load region and the knock intensity is equal to or greater than the predetermined value.

8. The method of claim 6 , wherein a load region of the engine is determined from a BMEP and a diesel ratio, and the diesel ratio is a diesel fuel amount relative to the entire fuel amount.

9. The method of claim 6 , wherein the knock intensity is calculated from a maximum combustion pressure, a maximum pressure rise rate and an engine speed detected by the driving information detector.

10. The method of claim 9 , wherein the knock intensity is calculated from an equation of:

RI
=

f
⁡

(

MPRR
,
RPM
,

P
max

)

=

2.88
×

10

-
8

×

(

MPRR
×
RPM

)

2

P
max

,

wherein MPRR denotes maximum pressure rise rate, RPM denotes engine speed, and Pmax denotes maximum combustion pressure.

Assignees

• Hyundai Motor Co Ltd
• Seoul Nat Univ R&Db Foundation

Inventors

• Jung Hyunsung
• Chi Yo Han
• Min Kyoungdoug
• Lee Jeongwoo
• Chu Sanghyun

Classifications

• F02D19/061

  by controlling fuel injectors · CPC title

• F02D19/081 Primary

  Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other · CPC title

• F02D19/0613 Primary

  Switch-over from one fuel to another (F02D19/081 takes precedence) · CPC title

• F02D19/0649

  Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers · CPC title

• F02D2200/1006

  Engine torque losses, e.g. friction or pumping losses or losses caused by external loads of accessories · CPC title