The customer is advised that Savvy has detected what they believe is a failing exhaust valve
, and which cylinder is involved.
These first ones are characteristic for responses for the exhaust valve
closing, where vibrations from cycle to cycle of the engine operation are not repeatable.
It is clear that to be able to operate a piston pump for extended periods, a simple yet effective alternative solution to the exhaust valve
problem must be found that would additionally provide tolerance for foreign particles and liquids.
Pistons rise to push the mixture of air and exhaust gases out of cylinders, and the air cools the exhaust valve
on the way out.
Typical diesel compression release engine brakes operate by actuating one or more exhaust valves
near piston top dead center (TDC) on the compression stroke .
The HC mole fraction was measured using an FFID unit, with a response time t10-90 of 1 ms, and a sampling position 8 cm from the exhaust valve
. The CO and C[O.sub.2] mole fractions were measured with a fast NDIR unit, with a response time [t.sub.10-90] of 8 ms, and a sampling position 6 cm from the exhaust valve
The key temperature relating to exhaust valve
and seat life is exhaust valve
face temperature, not cylinder head temperature, specifically, valve edge and seat temperature.
As in the OM 904, the OM 906 cylinder head features low-swirl ports and two intake valves and one exhaust valve
per cylinder, allowing both a vertically mounted injection nozzle for optimized fuel spray patterns and space for an optional decompression valve.
"Titanium aluminide retains its strength up to very high temperatures, so it is very popular as an exhaust valve
due to this property and on the inlet side due to its weight.
Using a special exhaust valve
camshaft profile, the exhaust valve
motion is controlled over the entire 360 [degrees] valve event, resulting in 360 peak retarding hp at 2100 rpm.