Factors influencing the risk of early and late serious infection in adults after splenectomy for trauma.

Disclosed are a method of injecting fuel and a fuel injection device in an internal combustion engine comprising a main chamber and an auxiliary chamber. An annular raised portion is formed on the inner wall of the auxiliary chamber and divides the auxiliary chamber into a first auxiliary chamber and a second auxiliary chamber. A connecting passage communicating the main chamber and the auxiliary chamber opens into the second auxiliary chamber tangentially to the inner wall of the second auxiliary chamber. A recess is formed in the second auxiliary chamber beneath the annular raised portion at a position located opposite to the inner wall to which the connecting passage is tangentially connected with respect to the axis of the auxiliary chamber. The nozzle of the fuel injector is directed to the recess so as to form a rich air-fuel mixture in the recess. The spark gap of the spark plug is located in the vicinity of the recess for igniting the rich air-fuel mixture formed in the recess. When the engine is operating under a heavy load, the fuel injection start timing is set at a constant timing, while, when the engine is operating under a light load, the fuel injection complete timing is set at a constant timing.