Basic element of system of a gazoraspredeleniye is the cam-shaft located in a head of the block of cylinders and put in action by a gear belt from a cranked shaft.
Gazoraspredeleniye phases (measured at a working gap of valves):
– OZD: 6 ° before VMT;
– ZZD: 32 ° after NMT;
– OZW: 57 ° before NMT;
– ZZW: 7 ° after VMT.
OZD and ZZD – respectively opening and closing of the inlet valve; OZW and ZZW–respectively opening and closing of the final valve.
Cam-shaft
The cam-shaft leans on five bearings, containing thin-walled loose leaves.
Lifting of valves:
– the inlet: 10 mm;
– the final: 9 mm.
Axial люфт: 0,1–0,2 mm.
Diameter of necks of bearings: 27,960–27,980 mm.
Gap in cam-shaft bearings: 0,020–0,079 mm.
Gear belt
The gear belt puts in action a cam-shaft, an intermediate shaft and the pump of cooling liquid.
Brand: Motorcraft.
Tension: it is regulated by automatically roller tension device.
Periodicity of replacement: each 60 000 km of run. |