摘要:
Various methods and systems are provided for an exhaust gas recirculation (EGR) EGR cooler (200) for an engine system (100). In one example, the EGR cooler (200) includes a first section (203) with a first group of tubes (270) adapted to flow exhaust gases (272), and also includes a first group of passages (271) formed by exterior surfaces of the first group of tubes (270) and adapted to flow coolant from a coolant source (152). The EGR cooler (200) also includes a second section (205) including a second group of tubes (260) adapted to flow coolant from the coolant source (152), and a second group of passages (225) formed by exterior surfaces of the second group of tubes (260) and adapted to flow the exhaust gas (272) from the first group of tubes (270).
摘要:
An Internal combustion engine (1), preferably a two-stroke engine for a large vessel, comprises an exhaust outlet (2) for disposing of exhaust out of a combustion chamber and an air inlet (3) for introducing air into the combustion chamber. At least one turbocharger (4) is connected to the exhaust outlet (2) by an exhaust passage (5) wherein a particulate filter device (6) is arranged downstream the exhaust outlet (2) on the high pressure side of the turbocharger, in particular of a turbine of the turbocharger, preferably in the exhaust passage (5).
摘要:
A deposit amount calculation unit (111) calculates an accumulation amount ΣDp of deposit by using an amount of fuel injection fq and a rotation speed NE as parameters, and when the accumulation amount ΣDp exceeds a first threshold value, then an inlet and an outlet of an EGR cooler are switched. A condensed water calculation unit (121) calculates a retention amount ΣCw of condensed water by using the amount of fuel injection fq and the rotation speed NE as parameters, and when the retention amount ΣCw exceeds a second threshold value, then the inlet and the outlet of the EGR cooler are switched.