To stably suppress the adherence of fuel onto the inner wall surface in an operation chamber and uniformly diffuse the injected fuel even when an intake state of a rotary piston engine changes.
A fuel injection device of a rotary piston engine 1 includes an injector 15 for directly injecting fuel through a plurality of injection holes 15a in an intake operation chamber 8 during an intake stroke. A part of the injection holes 15a are oriented to intake ports 11, 12, 13 to inject fuel (non-colliding spray S1). The rest are oriented to a recess 2b recessed to a flank surface 2a of a rotor 2 to inject fuel (colliding spray S2). Fuel injection timing is set within a period when intake flow speed reaches a prescribed value or more. Respective spray quantities of the non-colliding spray S1 and colliding spray S2 are set to be substantially identical.
COPYRIGHT: (C)2009,JPO&INPIT
Takeshi Yokoo
Mitsuo Nakamura
Ryoji Kagawa
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Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
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Kazunari Ninomiya
Tomoo Harada
Iseki Katsumori
Seki Kei
Yasuya Sugiura