Fuel Injection repair


Most diesel engines (with the exception of some tractors and scale model engines) have fuel injected into the combustion chamber.

Modern common-rail diesel injectors can fire two or three times per engine cycle—this doubles the wear on the injector compared to diesels of the past.
To tell if there is a problem with common-rail injection systems fueled with ultra-low-sulfur diesel (ULSD) fuel,
we need to know how many injectors have failed since its introduction.
The feedback we get from our readers and online reports of failures suggests there’s always room for improvement in our fuel, too.


We searched, Snooped and investigated various diesel fuel injection testing equipment.

CX5-600 have a good performance to test CR injector and pump ,( bosch,denso.Siemens,delphi.) (EUI/EUP (UIS&UPS) For CAT PUMP(according to your need to add)
The function of the tester for CR high pressure pumps is to provide the desired signal to drive the solenoid in the pump being tested. CX5-600 common rail Tester can used for testing following pumps: BOSCH CP1，CP2，CP3，DELPHI， SIEMENS, DENSO HP2 AND HP3.HP0. It has the functions to test the Electromagnetic injectors and piezoelectric injector.

Tests and Adjustments
1. After the parts are cleaned and inspected the fuel valve is assembled as per the manufacturer’s instructions and thereafter tested for function and performance.

2. The assembled fuel valve is installed on the test stand and after purging the pipe line the manual handle is operated in quick succession. The nozzle should start discharging with a sharp crackling noise at the set pressure. The pressure at which the injector is supposed to fire depends upon the manufacturer’s engine design but normally is between 250 to 350 kg/cm2 with an allowance of plus or minus 10 kg/cm2.

3. In case the lifting pressure is not correct, it can be adjusted by the adjusting screw.

4. The spray characteristics should be satisfactory and as per the manufacturers advice.

5. All the holes of the injector should be firing and can be checked by a torch light or a filter paper can be folded as a cone and then the injector tested. The holes on the filter paper will show the number of holes firing. In this procedure you must be careful as the high pressure spray can enter the skin and is toxic for us.

6. The spray angle should be as stated by the manufacturer. The atomization of the fuel should take place and solid spray should not come out.

7. Clean diesel oil should be used for the testing purpose.

8. In the case that the fuel valve is dripping the needle guide should be taken out and repaired.


 

https://www.cx5auto.com/cx5-600-have-a-good-performance-to-test-cr-injector-and-pump-boschdensosiemensdelphi-p00052p1.html

评论

发表评论

此博客中的热门博文

The principle of dry ice blasting machine——will the removal of carbon deposits by dry ice blasting machine damage the engine?

图片
Dry ice cleaning machine principle: dry ice blasting, also known as cold spray, is based on compressed air as the power and medium, dry ice particles as accelerated particles, which are sprayed onto the surface of the cleaning object through a special spray cleaning machine, using the momentum change ( Δ mv) of solid dry ice particles, heat transfer, such as lifting, melting, etc., so that the stains, oil stains, residual impurities, etc. on the surface of the cleaned object are quickly frozen, and then condensed, embrittled and separated with the air flow.                            Cleaning effect comparison With the popularity of dry ice blasting, dry ice blasting is widely used in marine ships, aerospace, historical buildings, industrial rust removal, printing equipment, cold chain transportation, chemical boilers, industrial molds and other fields.   In addition to the atmosphere of the landscape or stage, dry ice is also a cleaning material. As a recognized safe, environmentally
阅读全文

What do you know about four-wheel alignment?

图片
 What is four-wheel alignment? There is a certain relative position between the four wheels of the vehicle, the steering mechanism, and the front and rear axles. The relative position is the standard value specified by the manufacturer. The installation to adjust and restore this position is the four-wheel alignment. Why does the vehicle need to be four-wheel alignment? Carrying out four-wheel alignment can ensure the straightness of the vehicle, driving stability and automatic steering function, etc., reduce tire wear, and avoid multiple failures of the vehicle. Under what circumstances need to do four-wheel alignment? Four-wheel alignment is different from maintenance and is a means of maintenance. There is no need for four-wheel alignment for the vehicle if there is no problem. Generally, it is recommended to do four-wheel alignment for the vehicle in the following situations: A) The vehicle is off track When the vehicle turns left or right involuntarily, it needs to keep the steeri
阅读全文

If you don't know what is carbon cleaning machine , then It's time to know about it .

图片
1. Target and expectation The carbon deposition in the vehicle engine while the engine works, which makes the engine launching performance, the fuel consumption and the exhaust gas standard worse. the cleaning off process will eliminate the internal carbon deposition and  recover the original performance of the engine, and promote the accelerator response, and reduce the waste gas exhausting. the burning becomes more full, lower the fuel consumption,and make the useful life of the engine longer. This equipment is mainly used for cleaning engine carbon deposition, when vehicles exist the following problems, please solve the trouble first ,then use this equipment for carbon cleaning 1)Auto idle instability 2)Piston ring seal failure, burn oil 3)spark plug of aging ignition system 4)ternary catalytic sintering 5)fuel spray nozzle blockage 6)exhaust system Seal intake failure 2. Working principle and process Oxyhydrogen carbon removal machine is one our company oxyhydroge
阅读全文