The scheme of work of hydrojacks of thermal backlashes of valves
1. THE CAMSHAFT CAM
2. THE HEAD OF THE BLOCK OF CYLINDERS
3. THE VALVE CORE
4. THE OIL CHANNEL
5. THE PUSHER WITH THE HYDROJACK
6. ПЛУНЖЕР
7. THE SLEEVE
8. THE RETURN VALVE |
9. THE SPRING OF THE RETURN VALVE
10. THE GLASS OF THE RETURN VALVE
11. SPRING ПЛУНЖЕРА
12. THE CAVITY AND
13. THE CAVITY
14. THE DIRECTION OF ROTATION OF THE SHAFT
15. THE OIL STREAM |
Hydraulic jacks provide practically беззазорные interfaces of details of a drive of valves. The backlash jack 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 (fig. the Scheme of work of hydrojacks of thermal backlashes of valves see).
1) In the closed position of the valve a pusher 5 and a sleeve 7 3 valves effort of a spring 11 nestle accordingly on a cam of 1 cam-shaft and a tip of a core. Pressure of oil in cavities And and is identical, the return valve 8 is pressed to a saddle by a spring 9. The backlash between the valve and a cam-shaft cam is absent.
2) At набегании a cam 1 5 last influences a pusher on плунжер 6. Moving плунжера 6 in a sleeve 7 leads to pressure growth in B.Pod's closed cavity high pressure action there are small leaks of oil through a radial backlash between a sleeve 7 and плунжером 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 Would become below pressure in a cavity And which подпитывается oil from lubricant system. The return valve 8 opens and Would pass oil in a cavity for restoration беззазорного interfaces of details of a drive of the valve. |