TH35504B - Gasoline direct injection internal combustion engine - Google Patents

Abstract

DC60 (02/07/53) In a gasoline direct injection internal combustion engine, the purpose is to provide Improving fuel efficiency and exhaust emissions by preventing or controlling diffusion and Separation of air-fuel mixtures due to squish The fuel injection flap 60 of the gasoline direct injection internal combustion engine injects the air-fuel mixture so that the outer periphery 63a of the injection stream 63 falls into the cavity 51 of the piston during compression stroke By the interaction of the squid area 54 which forms on the periphery of figure 53 of piston 5 and the squeegee area 34 forming below the ceiling surface 30 of the cylinder head 3, which defines the firing chamber. Burns 8, oblique squash 20 which is directed upward to midline on the periphery of Fig. 53 and flows along the opposite section 30a of ceiling surface 30, which is positioned towards the top of the The opening of ventricle 51 and is opposite the opening. will be born In gasoline direct injection internal combustion engines, the purpose is to provide Improving fuel efficiency and exhaust emissions by preventing or controlling diffusion and Separation of air-fuel mixtures due to freshness The fuel injection flap 60 of the gasoline direct injection internal combustion engine injects the air-fuel mixture so that the outer edge 63a of the injection flow 63 falls into the cavity 51 of the inner piston. during compression By the interaction of the sdwitch area 54 formed on the periphery of figure 53 of piston 5 and the sdwitch area 34 formed below the ceiling surface 30 of the cylinder head 3, which defines the combustion chamber. 8, an oblique switch 20, directed upward to the center of injection on the periphery of Fig. 53 and flowing along the opposite section 30a of the ceiling surface 30, which is positioned towards the top of the opening. of cavity 51 and opposite the opening will be born

Claims (3)

1. A gasoline direct injection internal combustion engine is composed of: a piston (5) with a cavity (51) at the top surface of the piston; a cylinder head (3); a combustion chamber (8) which is defined between the piston (5) and the cylinder head (3) and has a ceiling surface (30) formed by the inner surface of the cylinder head (3); an injection valve (60) exposed to the combustion chamber (8); and a spark plug (70) exposed to the combustion chamber (8), where the injection valve (60) injects fuel as an injection stream (63) with the injection axis (L4) directed into the interior of the cavity (51). It is unique in that the injection valve (60) is constructed in such a way that the outer portion (63a) of the injection stream (63) is inside the cavity (51) during the compression stroke. The piston squish area (54) is formed on the annular area (53) of the aforementioned piston top surface on the outside of the opening (51a) of the cavity (51). The piston squish area (54) includes a portion of that area that slopes upward from the outer annular area (53b) of that area in a direction toward the injection axis (L4). The ceiling surface (30) has the cylinder head squish area (34) formed on it, and that includes a portion that slopes upward from the outer annular area (30b) of the ceiling surface in a direction toward the injection axis (L4). The piston squish area (54) and the cylinder head squish area (34) are arranged. To work together to form an oblique squish (20) which is angled upward toward the injection axis (L4) above the annular area (53) and which is aligned with the opposite part (30a) of the ceiling surface (30) which is positioned opposite to the opening (51a), the injection stream (63) from the fuel injection valve (60) is a fuel-air mixture. The fuel injection valve (60) is constructed in a configuration for the injection of the mixture. The air and fuel mixture is supplied with a distance between the inner portion (53a) of the said area (53), which defines the boundaries of the said opening (51a), and the outer portion (63a) of the said injection stream (63), which is significantly uniform throughout the entire circumference of the said inner portion (53a) of the said area (53). The said fuel injection valve (60) is positioned directly opposite the center of the said opening (51a) when viewed in the direction of the said injection axis (L4), and there is an injector (62a) with a guide (62a1) for guiding the air-fuel mixture flow immediately after propulsion. The spark plug (60) is positioned to inhibit the dispersion of the air-fuel mixture flow. The leading part (62a1) is positioned in the cavity (51) and below the inner circumference (53a) that defines the opening (51a) of the cavity (51) when the piston (5) is at top dead center. The ignition part (71) of the spark plug (70) is positioned closer to the injector (62a) than the inner circumference (53a) and is positioned in the cavity (51) and below the injector (62a) when the piston (5) is at top dead center. 2. A direct-injection internal combustion engine under claim 1 in which the aforementioned piston squat area (54) is formed in the aforementioned ring area (53) of the top surface of the piston, excluding the recessed areas (55,56) formed to avoid obstruction of the intake and exhaust valves (9,10). The aforementioned piston squat area (54) contains the intake area (54a), the exhaust area (54b), and the first and second intermediate areas (54c,54d) that straddle the intake area (54a) and the exhaust area (54b) in a cross shape. When viewed in the direction of the center of the injection axis (L4) and the cylinder head swivel area (34), there is an intake area (34a), an exhaust area (34b), and the first and second intermediate areas (34c,34d) that straddle the intake area (34a) and the exhaust area (34b) in a cross shape when viewed in the formation of four streams in the direction toward the center of the injection axis (L4). 3. An internal combustion engine with direct fuel injection according to claim 1 or 2, in which the inner circumference (53a) of the circumference area (53) is laid on a plane intersecting with the axis of the cylinder (L1), and the cavity (51) has a gradually inclined lower surface (52a) with its deepest part opposite to the ignition section (71).