7 - 2 FUEL INJECTION NOZZLE HOLDER
1.Specifications
~~~
Part Name
Part No.
Identification mark
No. of nozzle hole
(Diameter)
Valve opening pressure
Spring constant
I
NOZZLE HOLDER | I |
10511840 00
C
4
(0.22mm)
195 kg/cm2 | - |
|
13.2kg/cm2
a
2.Features
Both the injection nozzle and the injection pump are very important parts for producing fuelfog for combustion. There are two types of injection nozzle, one is hole type and the otheris pintle type. The injection nozzle for DY30 and DY35Diesel engine is developed as a result of joint research and development project by Diesel Kiki, K. K. and our company, and it is direct combustion system,having the special hole type nozzle.
For producing better combustion gas, it utilizes swirl and squish flows and for producing the most proper fuel fog, injection pressure is raised up to 195 kg/cm2.
3. | Structure of the ignition nozzleholder | IDENTIFICATION MARK |
|
| |
T h s consists of the nozzleholderandnozzle. The nozzle | \ | FUEL INLET |
| ||
| / |
|
| ||
holder fixes the nozzle to the cytinderhead and at the same |
|
| TlNG WASHER |
| |
timeitplaysthe role of fuel passage to thenozzle. (The |
|
| /- | ||
|
|
|
| ||
valve opening pressure of nozzle is adjustable. However, the |
|
|
|
| |
nozzle for DY30 and DY35 engines includes spacerin it and |
|
|
|
| |
it is unadjustable.) |
|
|
|
| |
Thenozzle consists of the nozzle bodyand needle valve; |
| NOZZLESPRING |
|
| |
andwhen the pressurereaches thelimit to open the valve, |
|
|
| ||
|
|
|
| ||
nozzle for this diesel engineincludesspacer in itandit is |
|
|
|
| |
unadjustable.) |
|
| NOZZLE BODY |
| |
|
|
|
| ||
|
|
|
| Fig. 61 |
|
4. | Function of nozzle | V A L V E CLOSED | V A L V E OPENED |
| |
|
| ||||
Through the injection pump, fuel is delivered forcibly into the nozzle body andit raise up the needle valve and is at- omized in thecombustionchamberthroughtheholesof
the nozzle body. In case of the hole type nozzle, the size of the opening of the holes does not alter(See. Fig. 62.)
Fig. 62
- 33 -