Air precleaner arrangement for an internal combustion engine comprising two cyclone filters

An internal combustion engine assembly comprising:

• an internal combustion engine with an air inlet and an exhaust port;
• a screen having air permeable openings sized to retain debris, the screen having a downstream surface and an upstream surface;
• a shroud at the downstream surface of the screen;
• a fan mounted in the shroud and arranged to provide an air stream through the openings of the screen;
• a first cyclone filter having an air inlet, an air outlet and a scavenge port, wherein the air inlet of the first cyclone filter is located at the downstream surface of the screen and the scavenge port opens towards the shroud;
• a second cyclone filter having an air inlet, an air outlet and a scavenge port, the air inlet of the second cyclone filter connected to the air outlet of the first cyclone filter, and the air outlet of the second cyclone filter connected to the air inlet of the internal combustion engine.

An agricultural harvesting machine comprising:

• an internal combustion engine with an air inlet and an exhaust port;
• a screen having air permeable openings sized to retain debris, the screen having a downstream surface and an upstream surface;
• a shroud at the downstream surface of the screen;
• a fan mounted in the shroud and arranged to provide an air stream through the openings of the screen;
• a first cyclone filter having an air inlet, an air outlet and a scavenge port, wherein the air inlet of the first cyclone filter is located at the downstream surface of the screen and the scavenge port is connected with the shroud;
• a second cyclone filter having an air inlet, an air outlet and a scavenge port, the air inlet of the second cyclone filter connected to the air outlet of the first cyclone filter, and the air outlet of the second cyclone filter connected to the air inlet of the internal combustion engine.