The following points must be given extra thorough consideration when designing a cooling system: • The maximum ambient temperature the engine must operate in. • Cooling air flow direction, i.e. if a puller or pusher fan is to be used. A pusher fan is recommended for generator sets to avoid generator overheating. On mobile applications, consideration must be give to any slipstream.
EMS 2 stands for "Engine Management System" and is an electronic system with CAN communications (Controller Area Network) for control of diesel engines. The system has been developed by Volvo Penta and includes fuel control and diagnosis function.
Engine coolant is used to cool charge air in TWD engines. Coolant is pumped through the circuit via a pipe from the radiator to the charge air cooler. After coolant has passed through the charge air cooler tubes it is fed to the pump. The illustration shows twin charge air coolers on a TWD1643GE engine.
Pump suction capacity depends on coolant pressure and temperature. An increase in coolant temperature reduces suction capacity. In order to avoid cavitation there must be a static pressure on the suction side of the pump. To achieve this there must be a hose from the expansion tank to the suction side of the pump.
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