摘要:
A piston for an internal combustion engine, including a piston crown having a central axis, and a piston bowl disposed in the piston crown, on which two tumble flows of air are provided. The piston bowl has a generally V-shaped contour in section taken along a vertical plane intersecting the tumble flows, on which the two tumble flows are retained at an inclined state toward a central axis of the piston crown.
摘要:
A direct injection spark-ignited internal combustion engine according to the present invention has a fuel injection valve that injects fuel directly into a fuel combustion chamber and is provided to a cylinder head, a fuel injection valve gasket that is inserted between the cylinder head and the fuel injection valve, and a water hole that is formed in a cylinder head gasket near the fuel injection valve gasket. The fuel injection valve is cooled through a seal portion of the fuel injection valve gasket, by cooling water in contact with the bottom surface of the cylinder head through the water hole.
摘要:
A piston for a cylinder direct injection spark ignition internal combustion engine mounted on an automotive vehicle. The piston comprises a piston head including a protruded section which is protruded from a standard horizontal plane which is perpendicular to a center axis of the piston. The protruded section has a cavity whose periphery forms a generally circular ridgeline, and an inclined surface formed outside the ridgeline and extending toward a periphery of the piston head. The inclined surface continuously slopes down in a direction from the ridgeline to the periphery of the piston. The inclined surface forms an angle (.theta.1) ranging from 10 to 60.degree. relative to the standard horizontal plane. The cavity has a depth (A) within a range of from 3 to 9 mm which depth is an axial distance between a bottom surface of the cavity and the standard horizontal plane of the piston. Additionally, the cavity is defined by a generally annular side wall surface which is represented by first and second opposite curved line segments on a vertical plane containing a center axis of the piston and a center axis of the cavity. The first curved line segment is located closer to a spark plug than the second curved line segment. The first curved line segment has a radius of curvature, ranging from 5 to 20 mm.
摘要:
A double overhead camshaft engine having two camshafts rotatably supported by a cylinder head. This two camshafts are drivably connected through an idler gear with a crankshaft of the engine by means of drive chains. The idler gear is rotatably mounted on an idler gear installation bolt which is fixedly secured only to a front end section of the cylinder head in a so-called cantilever arrangement. A surrounding wall structure for the idler gear is formed integral with the front end section of the cylinder head and extends in the direction of axis of the idler gear over the idler gear to form a front end section. An opening is formed at the surrounding wall structrure front end section and located on an opposite side of the cylinder head front end section with respect to the idler gear. The opening is closed with a cover which is disposed spaced from the idler gear installation bolt, so that no connection is made to the idler gear and the installation bolt therefor.
摘要:
A direct-injection spark-ignition engine having engine cylinders bored in a cylinder block, and a cylinder head mounted on the cylinder block, comprises at least one intake port provided for each of the engine cylinders. The ratio V/A of a stroke volume V (cm.sup.3) per cylinder to a cross-sectional area A (cm.sup.2) is set within a predetermined range defined by 45.ltoreq.V/A.ltoreq.55, where the cross-sectional area A is a minimum cross-sectional area obtained when the at least one intake port is cut by a plane extending in a direction substantially normal to a stream line of intake air flowing through the intake port.
摘要翻译:具有钻头在缸体中的发动机气缸的直接喷射火花点火发动机和安装在气缸体上的气缸盖包括为每个发动机气缸设置的至少一个进气口。 每缸的行程体积V(cm3)与横截面积A(cm2)的比值V / A被设定在由45 V / A <55定义的预定范围内,其中横截面积 区域A是当至少一个进气口被沿基本上垂直于流过进气口的进气流线的方向延伸的平面切割时获得的最小横截面面积。
摘要:
An electrically driven vehicle includes a vehicle body, a battery that is mounted in the vehicle body and is usable for running, and a generator unit that is detachably mounted in the vehicle body and charges the battery, a first fuel tank that stores fuel supplied to the generator unit being provided in the vehicle body. The generator unit includes a generator-unit-side fuel tank that stores fuel of the generator unit, and a fuel pipe is provided so as to detachably connect a vehicle-side fuel tank and the generator-unit-side fuel tank.
摘要:
In an arrangement for a spark-igniting direct-injection internal combustion engine, a division of X by B (X/B) (B denotes a cylinder bore diameter of each cylinder and X denotes a distance from a fuel injection nozzle up to a center axial line of the corresponding cylinder) ranges from 0.38 to 0.46. A division of Y by B (Y/B) ranges from 0.4 to 0.5 (wherein Y denotes a distance from a line passing through a spark-ignition portion of a spark plug up to an injection nozzle of the fuel injection valve. A division of Z by B (Z/B) ranges from 0.2 to 0.3 (wherein Z denotes a distance from the nozzle of the fuel injection valve up to a center of the intake valve).
摘要:
In an engine having a camshaft mounted on a cylinder head via plural camshaft supporting portions; a camshaft sprocket coaxially coupled to the camshaft; an idler sprocket rotatably supported between the camshaft and the crankshaft on the cylinder head; a first chain reeved around the crankshaft and the idler sprocket; and a second chain reeved around the idler sprocket and the camshaft sprocket, an oil jet hole is formed in the frontmost camshaft supporting portion in communication with a main oil passage via an annular oil groove formed in the camshaft and an inclined oil groove formed in the cylinder head, so that lubricant can be sufficiently jetted from the oil jet hole to the second chain located near the frontmost camshaft supporting member, without use of an additional oil jet pipe member.
摘要:
An electrically driven vehicle includes: a vehicle body; a first battery mounted in the vehicle body and usable for running; a generator unit that is detachably mounted in the vehicle body and charges the first battery; diagnosis means for diagnosing whether the generator unit is capable of generating power; and management means for performing a management of an amount of charge of the first battery according to a diagnostic result of the diagnosis means.
摘要:
An electrically driven vehicle equipped with a battery usable for running in which a power generation unit of engine driven type that charges the battery is detachably mounted on a vehicle body, includes including a first connection part that brings a high-voltage system in which the battery and the power generation unit are electrically connected together into a connected state in a state in which the power generation unit is mounted in a mounting position and brings the high-voltage system into a disconnected state in a state in which the power generation unit is dismounted from the mounting position, whereby the first connection part switches a connection state of the high-voltage system in accordance with installation or removal of the power generation unit. The first connection part includes a connector on the vehicle side and a connector on the power generation unit side.