High pressure common rail injector maintenance process 1: CRIN1 (the first generation of commercial vehicle trucks) injector
The common types in the current sales market are: Yuchai engine 0445120***007121122123
Komatsu excavator 04451200 Mitsubishi 5M70 diesel engine: 0445120006
Iveco; 0445120002, Dongfeng Renault; 0445120084085 these!
Before changing valve parts
In order to better understand the whole process of overhauling, when dissolving the injector, measure first before dissolving, sometimes the valve parts can be saved! The injector can be repaired only by adjusting.
Remove the relay to measure the armature lift (index value: 45-50um)
Measure the total travel arrangement of the armature (index value: 85-95um)
Measure the remaining magnetic density (index value: 35-55um)
If the error does not dissolve the injector dismantling and replacing valve parts
When removing the injector, measure the injector needle valve lift by the way (different according to the high horsepower size)
After dismantling and replacing valve parts
Measure the lift of the injector needle valve and determine the thickness of the injector needle valve gasket (the high-horsepower size is different)
Measure the total travel arrangement of the armature and decide the thickness of the spring sheet
Measure the armature stroke arrangement and determine the thickness of the hexagonal gasket underneath
Measure the remaining magnetic density and determine the thickness of the upper hexagonal gasket
After installing the injector
Pre-spraying is not suitable for adjusting the spring force adjustment gasket of the relay
Waiting speed is not suitable for adjusting the elastic yellow gasket of the injector needle valve
1, armature lift adjustment washer (0.950-1.054) one piece apart 0.004
2. The remaining magnetic density adjustment gasket (1.21-1.38) is separated by 0.01
3. The injector lift adjustment gasket (1.00-1.36) is separated by 0.01
4. The spring force adjusting gasket (1.00-2.00) of the injector needle valve is one piece apart by 0.02
,5, the relay spring force adjustment washer (0.94-1.60) one piece apart 0.04
6. Spring leaf
7. The armature total stroke arrangement adjustment spring sheet
2. CRIN2 fuel injector (the second generation of commercial vehicle trucks), below the general fuel injector
Xichai; 081078215 etc.
Quanchai: 086170169149159213214224265 etc.
Changchai: 110 etc. also have Yuchai engine 289 etc.
Before changing valve parts
In order to better understand the whole process of overhauling, when dissolving the injector, measure first before dissolving, sometimes the valve parts can be saved! The injector can be repaired only by adjusting.
1. Remove the anti-static rubber of the injector, remove the yellow spring and gasket after removing the relay, and then install the relay to measure the armature lift (index value: 45-50um)
2. Measured lift (index value: 35-50um)
3. Check the remaining magnetic density of the relay (index value: 35-55um)
If the error is not large, consider removing and replacing valve parts
Incidentally, measuring injector needle valve lift
After changing valve parts
Measure the lift of the needle valve of the injector, and make the decision of the needle valve lift gasket (different according to the high horsepower size)
Measure the lift, determine the thickness of the gasket
Measure the armature lift, decide the armature lift gasket
Make sure the magnetic density of the relay remains
After installing the injector
If the pre-spray is not suitable for adjusting the thickness of the relay gasket
If the standby speed is not suitable for adjusting the thickness of the needle valve elastic yellow gasket
1: Armature lift adjustment washer, thickness 1.512-1.684mm, a distance of 0.004mm, 44 levels
2, over-lift adjustment gasket, thickness: 0.985-1.145mm, a distance of 0.01mm, 17 levels
3, injector needle valve lift adjustment gasket, thickness: 1.00-1.36mm, a distance of 0.01mm, 37 levels
4, the elastic yellow force adjustment gasket of the injector needle valve, thickness: 1.00-2.00, a distance of 0.02mm
5, relay spring force adjustment gasket, thickness: 0.94-1.60mm, distance between one piece is 0.03mm
CRI (new energy passenger car injector) 0445110*** type, generally 4-cylinder engine
Before changing valve parts
In order to better understand the whole process of overhauling, when dissolving the injector, measure first before dissolving, sometimes the valve parts can be saved! The injector can be repaired only by adjusting.
1. Remove the relay to measure the armature lift (index value: 40-45um)
2. Measure the total travel arrangement of the armature (index value: 55-70um)
3. Measure the remaining magnetic density of the relay (index value: 35-55um)
If the error is not large, consider removing and replacing valve parts
Incidentally, measuring injector needle valve lift
After changing valve parts
Measure the lift of the injector needle valve (different according to the high horsepower size)
Measure the total travel arrangement of the armature, and decide the thickness of the spring sheet for the total travel arrangement of the armature
Measure the armature lift, decide the armature lift gasket
Measure the magnetic density of the relay, and decide the thickness of the magnetic gasket
After installing the injector
If the pre-spray is not suitable for adjusting the thickness of the relay gasket
If the standby speed is not suitable for adjusting the thickness of the needle valve elastic yellow gasket
