WinGD X92DF, Руководство по эксплуатации

Страница: 173 / 608

• Air spring
When the exhaust valve is closed, compressed air flows through an air inlet connection
into the air spring (011). When the exhaust valve opens, this air is compressed to a higher
value. When the hydraulic oil pressure releases, the compressed air expands and thus
closes the exhaust valve.
• Thrust piece
The thrust piece on the valve spindle (005) prevents damage to the inside piston (002)
and to the top of the valve spindle (005) when the exhaust valve operates.
• Valve stroke sensor
The valve stroke sensor monitors and transmits the open and closed positions of the
valve spindle (005) to the ECS.
• Cup spring
The cup spring (010) absorbs vibration and shock to prevent damage to the exhaust
valve.
Different parts of the exhaust valve are lubricated as follows:
• Leakage oil from the outer piston and inner piston (002) lubricates the air spring piston
(004). Oil in the leakage oil collection space (012) drains to the leakage oil drain.
• While the exhaust valve closes, oil flows through the air spring piston (004) and into the
air spring (011). The air in the air spring (011) changes oil that collects at the bottom of
the air spring into a mist. The mist lubricates the upper part of the valve spindle (005).
• Oil that collects at the bottom of the air spring (011) flows through a groove on the lower
side of the distance ring and through holes in the guide bush. Thus the oil lubricates the
bottom part of the valve spindle (005).
• When the exhaust valve opens, oil flows out of the air spring (011) through the throttle
valve in the air spring pipe to the collector for leakage oil. The oil in the collector
automatically drains through the leakage oil pipe into the crankcase.
X92DF
AA00-2751-00AAA-043A-A
Operation Manual Exhaust valve
Winterthur Gas & Diesel Ltd.
- 173 - Issue 002 2020-08