Đồ án tốt nghiệp - Application research AVL boost simulates petrol - Ethanol engine

HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND
EDUCATION
FACULTY OF INTERNATIONAL EDUCATION

GRADUATION PROJECT
APPLICATION RESEARCH AVL BOOST SIMULATES
PETROL – ETHANOL ENGINE

Major:

AUTOMOTIVE ENGINEERING

Supervisor: MSc. ĐINH TẤN NGỌC
Students:

Nguyễn Trần Anh Tuấn 21145060
Nguyễn Ngọc Khánh

Ho Chi Minh City, June 2025

21145585

v

vi

ACKNOWLEDMENTS
We would like to sincerely thank to MSc. Đinh Tấn Ngọc from the Faculty of
International Education for his strong support and helpful guidance during our
project. His advice and feedback helped us solve problems, improve our work, and
stay on the right track. We truly appreciate his time and dedication to helping us
succeed.
We are also very thankful for his kind support and useful suggestions
throughout the project. His technical knowledge and clear advice helped us better
understand many parts of our work. His support made a big difference, and we are
grateful for his efforts.
I would also like to convey our heartfelt appreciation to the esteemed
professors at Ho Chi Minh City University of Technology and Education,
particularly the faculty members, for their enthusiastic teaching and the extensive
knowledge and expertise they shared with us during our academic journey. Their
support has been instrumental in enabling me to successfully complete this project.
Nonetheless, I acknowledge that errors may have occurred during the course
of this project’s implementation. I respectfully invite constructive feedback from my
instructors, as it will provide valuable insights to enhance my learning and
professional skills, ultimately contributing to my future endeavors in both education
and the workplace.
Thank you sincerely!
Nguyễn Trần Anh Tuấn
Nguyễn Ngọc Khánh

vii

TABLE OF CONTENTS
GRADUATION PROJECT ASSIGNMENT ........ Error! Bookmark not defined.
SUPERVISOR’S EVALUATION SHEET ........... Error! Bookmark not defined.
PRE-DEFENSE EVALUATION SHEET ............. Error! Bookmark not defined.
EVALUATION SHEET OF DEFENSE COMMITTEE MEMBER ..............Error!
Bookmark not defined.
ACKNOWLEDMENTS ................................................................................ vii
TABLE OF CONTENTS .............................................................................. viii
LIST OF FIGURES....................................................................................... xii
LIST OF TABLES ..................................................................................
...

...


1.5

600

31

Pipe 31

40

22

1

0.023

1.5

600

32

Pipe 32

80

30

1

0.019

1.5

600

33

Pipe 33

80

30

1

0.019

1.5

600

34

Pipe 34

80

30

1

0.019

1.5

600

35

Pipe 35

80

30

1

0.019

1.5

600

36

Pipe 36

50

30

1

0.023

1.5

550

37

Pipe 37

50

30

1

0.023

1.5

550

38

Pipe 38

40

30

1

0.023

1.5

550

39

Pipe 39

20

30

1

0.023

1.5

550

40

Pipe 40

37

30

1

0.023

1.5

550

41

Pipe 41

37

30

1

0.023

1.5

550

42

Pipe 42

90

30

1

0.023

1.5

500

43

Pipe 43

45

30

1

0.023

1.5

500

44

Pipe 44

35

30

1

0.019

1

400

45

Pipe 45

30

30

1

0.019

1

400

46

Pipe 46

30

30

1

0.019

1

400

114

Appendix 1.4.2: Friction Coefficients by Material and Pipe Diameter
Material
(Roughness
[mm])
Plastics

Pipe Diameter [mm]
30

60

100

150

0.011

0.01

0.01

0.01

0.023

0.019

0.017

0.016

0.032

0.027

0.023

0.021

0.037–0.044

0.029–0.037

0.026–0.031

0.023–0.028

(0.0015)
New Steel
(0.05)
Old Steel
(0.17)
Iron
(0.25–0.5)

Appendix 2. CALCULATION OF PARAMETERS RELATED TO VALVE
MODELING
Appendix 2.1. Scale Factor Calculation Method in the Valve Model
Modeling multiple valves and calculating the Scale Factor
• Valve seat diameter: 30.5 mm
• Valve throat diameter: 25.5 mm
• For the intake valve:
2
????????1

???????????? = ???????? ???? 2

????????????????

30.52

= 1 × 81.52 = 0.94

115

• For the exhaust valve:
2
????????1
25.52
???????????? = ???????? 2 = 1 ×
= 0.96
262
????????????????????
Appendix 2.2. Method for Calculating Valve Lift
Appendix 2.2.1. Valve Lift Calculation Method
Engine Valve Timing Diagram
The intake and exhaust valve lift is calculated using the following formula:

????=

360 × (???????????? − ???????????? )
????????????????
× (1 − cos (
))
2
???????????? − ????????????

Where:
L: Valve lift at crank angle ????????????
Lmax: Maximum valve lift
????cr : Crank angle
????op : Valve opening angle
????cl : Valve closing angle
Appendix 2.2.2. Intake Valve Lift
No.

Angle [°]

Lift [mm]

1

367

0

2

382

0.411956

3

397

1.576593

4

412

3.292534
116

5

427

5.263078

6

442

7.1475

7

457

8.619966

8

472

9.425873

9

487

9.42587

10

502

8.619966

11

517

7.1475

12

532

5.263078

13

547

3.29253

14

562

1.576593

15

577

0.411956

16

592

0

No.

Angle [°]

Lift [mm]

1

138

0

2

154

0.471883

3

170

1.794071

4

186

3.704688

5

202

5.825312

6

218

7.735929

Appendix 2.2.3. Exhaust Valve Lift

117

7

234

9.058117

8

250

9.53

9

266

9.058117

10

282

7.735929

11

298

5.825312

12

314

3.704688

13

330

1.794071

14

346

0.471883

15

362

0

118