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    • 3. 发明公开
    • INTERNAL COMBUSTION ENGINE
    • 内燃机
    • EP2937530A3
    • 2015-12-30
    • EP15161325.4
    • 2015-03-27
    • Toyota Jidosha Kabushiki Kaisha
    • Kamei, NobuhiroSasaki, YasujiAbe, Kazuyoshi
    • F01L3/00F01L3/22F01L3/20F02F1/42F02B31/00
    • F01L3/00F01L3/20F01L3/22F02B31/00F02F1/4235Y02T10/146
    • An engine includes: an intake port that includes a main flow passage that communicates with a combustion chamber via a throat section; the main flow passage section includes a first/second surfaces; a first extended line defined by extending an end of the first surface toward the combustion chamber is located at the throat section side rather than an umbrella section of an intake valve when the intake valve is in a maximum lift state; a crossing position between the end of the first surface and the throat section has a bent shape; a second extended line defined by extending a middle line located at the middle of the first surface and the second surface toward the combustion chamber is located at the combustion chamber side rather than a portion of a valve seat that is closest to the exhaust port.
    • 发动机包括:进气口,其包括经由喉部与燃烧室连通的主流道; 主流道部分包括第一/第二表面; 当所述进气门处于最大升程状态时,通过将所述第一表面的端部朝向所述燃烧室延伸而限定的第一延长线位于比进气门的伞形部分更靠喉部侧处; 第一表面的端部与喉部之间的交叉位置具有弯曲的形状; 通过将位于第一表面和第二表面中间的中间线朝向燃烧室延伸而限定的第二延长线位于燃烧室侧而不是最靠近排气口的阀座的一部分。
    • 7. 发明公开
    • Direct injection spark ignition engine and method of operating it
    • Direkteinspritzungsottobrennkraftmaschine und Vefahren zum Betrieb
    • EP1770256A2
    • 2007-04-04
    • EP06020332.0
    • 2006-09-27
    • Mazda Motor Corporation
    • Yamashita, HiroyukiSeto, MasatoshiYoshida, Hiroyuki
    • F02B17/00
    • F02B17/005F02B23/104F02B23/105F02B31/00F02B2023/103F02B2023/106F02D41/3029F02D41/402Y02T10/125Y02T10/146Y02T10/44
    • A direct injection spark ignition engine comprises a cylinder, a piston which is reciprocally movably arranged in the cylinder and defines with the cylinder a combustion chamber, a fuel injector arranged at one side of a center axis of the cylinder for directly injecting fuel into the combustion chamber, and a smoothly continuous lowered recess formed on a top surface of the piston surface for receiving at least part of fuel injected from the injector. The recess has a first cross section along a first plane including the cylinder center axis and a nozzle end of the injector. The first cross section has first and second lower contours substantially of arc shape with its center above the recess. The first and second lower contours are smoothly connected with each other through a lowest point of the first cross section. The first lower contour is located at the one side of the cylinder center axis. The second lower contour is located at the other side of the cylinder center axis. The first contour has a larger radius than a radius of the second contour. Accordingly, the fuel spray having greater movement energy may impinge the recess at a regulated impinging angle. Consequently, this configuration may properly guide the fuel spray, prevent the wet fuel spot anywhere within the combustion chamber, and create properly stratified air fuel mixture.
    • 直喷式火花点火发动机包括气缸,活塞,其可往复运动地布置在气缸中并且与气缸一起限定燃烧室,燃料喷射器布置在气缸的中心轴线的一侧,用于将燃料直接喷射到燃烧 以及形成在活塞表面的顶表面上的平滑连续的降低的凹部,用于接收从喷射器喷射的燃料的至少一部分。 所述凹部沿着包括所述气缸中心轴线和所述喷射器的喷嘴端的第一平面具有第一横截面。 第一横截面具有基本上具有圆弧形状的第一和第二下部轮廓,其中心在凹部上方。 第一和第二下部轮廓通过第一横截面的最低点彼此平滑地连接。 第一个下轮廓位于气缸中心轴的一侧。 第二个下轮廓位于气缸中心轴的另一侧。 第一轮廓具有比第二轮廓的半径更大的半径。 因此,具有较大移动能量的燃料喷雾可以以稳定的碰撞角度撞击凹部。 因此,这种构造可以适当地引导燃料喷雾,防止燃烧室内任何地方的湿燃料点,并且产生适当分层的空气燃料混合物。