Page 193 - Kỷ yếu hội thảo quốc tế: Ứng dụng công nghệ mới trong công trình xanh - lần thứ 9 (ATiGB 2024)

184 TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT - ĐẠI HỌC ĐÀ NẴNG

In there: W ' :a function in the coil and its 3. DESIGNING, SIMULATING THE NOZZLE
m
inductance. Based on the calculated parameters, the design in
Table 2, and the design software, the team concluded
The inductance L(x) of coil is calculated as and produced a detailed drawing and 3D model of the
follows:
nozzle. All the component details of the nozzle are
N 2 shown in Figure 1.
L ( ) x = (13) Choosing the material for the nozzle directly in
 n 1 Ri
the engine combustion chamber greatly affects the
In there:  1 Ri performance and life of the nozzle. The materials
n
used must meet many requirements, such as being
is the total magnetoresistance of the system. able to withstand high temperatures in the combustion
The relationship between the number of wire rings chamber without deformation or loss of mechanical
and the intensity of the current, is expressed through properties. Corrosion resistance is also an important
the Ampe law: factor, high corrosion resistance is necessary to
Hdl=N i (14) maintain accuracy and long life, as the nozzle is
subjected to the influence of the fuel flow injected
2.2. Technical specifications with high pressure. High mechanical strength enables
Table 1. Specifications required the nozzle to withstand high pressure without
for the Honda GX160 engine cracking or breaking. Good thermal conductivity
No Symbols Parameter Dimensions helps to distribute heat evenly, reducing the risk of
1 Cylinder Capacity (D) 163 cm 3 local overheating. Good machinability is an essential
element in the manufacture of the complex details of
2 Number of crankshaft 3000 Rpm the nozzle with high precision. Finally, the material
revolutions (n)
needs to maintain its mechanical properties (such as
3 Charging performance(  ) 0,8 hardness and durability) at high temperatures without
v
4 End of charge temperature 330 K much reduction. In this study, the material is C45
(T) alloy steel. The mechanical and logistical conditions
5 Initial loading temperature 700 K correspond to the working conditions of the engine,
(T 0) and the simulation results also show that the nozzle
Table 1 has given the specific parameters for the meets the requirements for nozzles used on the Honda
operating conditions of the Honda GX160 engine, and GX160 engine.
this is an important basis for calculating and To lower processing costs as well as the cost of
designing the nozzle in the most optimal way. The direct injection products into the combustion
characteristic parameters of the engine for the nozzle chamber, the team took advantage of the details
include: Cylinder capacity (D); the number of already available on the market. The precision CNC
crankshaft rotations (n); filling performance ( η ), end machining method is chosen to produce the remaining
v
of filling temperature (T), beginning of filling temperature details. With this method, the particles in the nozzle
(T0). After applying the calculation equations in will be handled with the smallest assembly error
section 2.1, we get the following parameter table: tolerance.
Table 2. Specifications of the injector are designed 3.1. Design
based on syngas components 15-20% H2, The design also shows that when the door is
15-20% CO, 1-5% CH4, 10-15% CO2 opened, the syngas will be injected into the
No Symbols Parameter Dimensions combustion chamber under high pressure. When the
1 Air Flow (R m) 3,2636.10 kg/s compression process is completed, the high pressure
-5
2 Amount of fuel injected 2,72.10 kg in the combustion chamber will push the nozzle
-5
into the cylinder (m syngas) pushbar to the closed position while closing the
3 nozzle as the xupap loads and discharges. Thanks to
ρ 487,01 kg/m 3
syngas this, the syngas is completely retained in the
4
γ 4777,6 N/m combustion chamber, preventing leakage and
3
syngas
5 2 optimizing fuel efficiency. The reverse nozzle is a
 24,502 N/m unique invention applied to internal combustion
p
6 T m 0,01 s engines, using poor syngas gas as fuel. The special
7 Injection hole diameter (d) 0,006 m feature of this nozzle lies in its intelligent operation
ISBN: 978-604-80-9779-0