5.8 Group 8 - Pipes
5.8.1 Exhaust waste gate
The optional exhaust waste gate is a by-pass pipe to the turbine (006, Figure 5-53) of the
turbochargers. The valve (007) in this pipe controls the flow of exhaust gas through the
turbines (006). This controls the compressor (002) of the turbochargers and thus the supply of
scavenge air to the scavenge air receiver (003).
During usual operation the valve (007) is closed and thus all the exhaust gas flows through the
turbines (006).
Fig 5-53 Exhaust waste gate (generic)
Legend
001 Air inlet 005 Exhaust gas manifold
002 Compressor 006 Turbine
003 Scavenge air receiver 007 Valve
004 Engine 008 Exhaust gas outlet
If the turbochargers deliver too much scavenge air pressure, the ECS opens the valve (007). If
the valve (007) is controllable, the ECS opens it as much as necessary. This decreases the
performance of the turbochargers and thus the pressure of the scavenge air.
If the valve (007) is blocked in the open position, you have to close the exhaust waste gate,
refer to section 10.13 Temporary isolate the exhaust waste gate.
X92DF
AA00-8135-00AAA-043A-A
Operation Manual Exhaust waste gate
Winterthur Gas & Diesel Ltd.
- 242 - Issue 002 2020-08
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