Daewoo Nexia

since 1994 of release

Repair and car operation



Deu Neksiya
+ Maintenance instruction
+ Maintenance
+ Engine
- 3. Engine (two top camshafts)
   3.2. General description
   3.3. Operation of hydraulic jacks of gaps
   3.4. Greasing system
   3.5. Maintenance and repair
   3.6. Compression check
   3.7. Dismantle and engine installation assembled
   3.8. Maple belt
   3.9. Engine support
   3.10. Inlet collector and laying
   3.11. Final collector and laying
   3.12. Cover of the klapanny mechanism and laying
   3.13. Pulley of a cranked shaft
   3.14. Forward cover of a gear belt
   3.15. Gear belt
   3.16. Natyazhitel of a gear belt
   3.17. Camshaft cogwheel
   3.18. Cogwheel of a cranked shaft
   3.19. Back cover of a gear belt
   3.20. Forward consolidation of a cranked shaft
   3.21. Camshaft. Hydrojacks of gaps of valves
   3.22. Head of the block of cylinders
   3.23. Repair of a head of the block of cylinders
   3.24. Klapannye of a spring. Consolidations of cores of valves
   3.25. Dismantle of valves
   3.26. Directing plugs of valves
   3.27. Expansion of openings of plugs
   3.28. Valves
   3.29. Klapannye of a spring
   3.30. Saddles of valves
   3.31. Oil pallet
   3.32. A reception branch pipe with the oil filter
   3.33. Oil pump
   3.34. Repair of the oil pump
   3.35. Pistons and rods
   3.36. Flywheel. Back consolidation of a cranked shaft
   3.37. Cranked shaft
   3.38. Rods and radical bearings
   3.39. Replacement of loose leaves
   3.40. Piston fingers and rings
   3.41. Block of cylinders
   3.42. Installation of pistons
   3.43. Disk balancing with a gear wreath
   3.44. Repair of carving openings
   3.45. Diagnostics of malfunctions
+ cooling System
+ Toplevnaya and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. Electronic control unit and sensors
+ Transmission
+ 10. Five-speed transmission and main RPO MM5 broadcast
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. Forward suspension bracket
+ 15. Drive of forward wheels
+ 16. Back suspension bracket
+ Brake system
+ Body
+ Heating, ventilation
+ Electric equipment


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3.3. Operation of hydraulic jacks of gaps

GENERAL INFORMATION

Scheme of operation of hydrojacks of thermal gaps of valves

 

1. CAMSHAFT CAM
2. HEAD OF THE BLOCK OF CYLINDERS
3. VALVE CORE
4. OIL CHANNEL
5. THE PUSHER WITH THE HYDROJACK
6. PLUNZHER
7. SLEEVE
8. RETURN VALVE
9. SPRING OF THE RETURN VALVE
10. GLASS OF THE RETURN VALVE
11. PLUNZHER'S SPRING
12. CAVITY AND
13. CAVITY OF B
14. DIRECTION OF ROTATION OF THE SHAFT
15. OIL STREAM

Hydraulic jacks provide almost bezzazorny interfaces of details of a drive of valves. The jack of a gap is built in a pusher of the valve and located between a tip of a core of the valve and the pusher bottom. Oil is brought to hydrojacks from lubricant system of the engine.

The jack works as follows (see fig. Scheme of operation of hydrojacks of thermal gaps of valves).

1) In a valve closed position a pusher 5 and a sleeve 7 3 valves effort of a spring 11 nestle respectively on a cam of 1 cam-shaft and a tip of a core. Pressure of oil in cavities And and B is identical, the return valve 8 is pressed to a saddle by a spring 9. The gap between the valve and a cam of a cam-shaft is absent.

2) At a nabeganiye of a cam 1 5 the last influences a pusher on a plunzher 6. Moving of a plunzher 6 in a sleeve 7 leads to pressure growth in B.Pod deystviyem's locked cavity of a high pressure there are small leakages of oil through a radial gap between a sleeve 7 and a plunzher 6. As time of influence of a cam for the valve is not enough, these leaks practically do not affect synchronous movement of a pusher 5 and sleeves 7. These details, moving as a single whole, open the valve.

3) In a phase of closing of the valve pressure in a cavity of B becomes lower than pressure in a cavity And which is fed with oil from lubricant system. The return valve 8 opens and passes oil in a cavity of B for restoration of bezzazorny interface of details of a drive of the valve.