The Operating Environment Of Diesel Engine - Bison BS-20KVA Operation Manual

Appendix 1 illustrates the changes of air density as the variations of altitude and ambient temperature.
For diesel engines operating in the environment deviated from the standard criteria, the power should be
modified according to the ambient environment or to the mutual agreement.
① Naturally-aspirated diesel engine (with mechanical governor or electronic governor)
For naturally-aspirated diesel engine, it is allowed not to reduce the service power if the altitude is lower
than 200M and the ambient temperature is less than 40℃. With altitude higher than 200M, apply the
service power specified in Appendix 1. Meanwhile, modify and reduce the service power according to
Appendix 2 while taking into consideration of percentage between air density and standard density.
② Supercharged diesel engine (with mechanical governor or electronic governor)
For supercharged diesel engine, it is allowed not to reduce the service power if the altitude is lower than
1000M and the ambient temperature is less than 40℃. In the event of altitude higher than 1000M, the
service power must be reduced according to the below table.
Altitude lower than 3000M
Altitude higher than 3000M
Ambient temperature

5. The operating environment of diesel engine

BS-30KVA/BS-50KVA series diesel engine for generators are all equipped with air inlet heating
device. With ambient temperature higher than -15℃ and below 40℃ at an altitude lower than 1000M,
diesel engine can properly operate.
Ensure good ventilation for engine operation with a working temperature below 50℃. For an engine
operating in an environment at a temperature greatly higher than the ambient temperature, connect the
engine inlet to a lower temperature location. Meanwhile, choose correct inlet pipeline to prevent large
air inlet resistance.
Users must inform the manufacturer if they have special requirements for the operating environment
when placing an order.
Power reduction %/M
Power reduction %/M
Power reduction %/M
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-4 per 500M
-6 per 500M
-3 per 5℃