摘要:
An engine system and a method of controlling a combustion process in an internal combustion engine are disclosed. The combustion process is based on compression ignition of a stratified air-fuel mixture using a high octane fuel such as gasoline. Multiple fuel injections may be used in a given combustion cycle. Fuel injection timing, EGR, exhaust rebreathing, late intake valve closing, and intake boost are controlled to enable autoignition over essentially the entire speed and load operating range of the engine, while providing reduced emissions, low noise, and low fuel consumption.
摘要:
OBJECTS To provide a cooling structure for effectively cooling an electromagnetic brake of a phase varying apparatus for an automobile engine MEANS OF ACHIEVING THE OBJECTS In a phase varying apparatus for varying the relative phase between an inner cylinder (20) of a camshaft (2) and a sprocket (12) rotatably mounted on the inner cylinder (20), the phase is varied by energizing an electromagnetic brake (40) adapted to put a braking force on a rotary drum (44) rotatably and coaxially mounted on the inner cylinder (20). A fastening bolt integrally connects the inner cylinder 20 with the body 2a of the camshaft (2). A gap S1 is formed between the head (6a) of the fastening bolt 6 and the inner cylinder (20). A spacer (24) is provided to place the rotary drum (44) at a right axial position on the periphery of the inner cylinder (20). The spacer (24) is provided with grooves (26) (to form oil channels 25) formed in one end face thereof in abutting contact with the head (6a) of the fastening bolt (6). Engine oil is lead to an oil sump (74) formed inside an annular braking section via oil paths (70) formed in the inner cylinder (20) and the oil channels (25). In order to secure a sufficient amount of oil to be stored in the oil sump (74) and supplied to the sliding surfaces for efficient cooling thereof, the length of the bolt head (6a) projecting into is reduced. Thus, an effectively increased amount of oil contributes to efficient cooling of the sliding surfaces.
摘要:
A device for controlling an internal combustion engine based on a temperature of a certain portion in the cylinder, comprising a variable valve mechanism for varying opening areas of at least either the intake valves or the exhaust valves, wherein a temprature of gas in the cylinder is calculated based on the opening area of at least either the intake valve or the exhaust valve varied by the variable valve mechanism, and the internal combustion engine is controlled based on the temperature of gas in the cylinder.
摘要:
The invention relates to a camshaft, especially for motor vehicle engines, comprising a first shaft and a second shaft forming a hollow outer shaft (1) and an inner shaft (2) arranged coaxially in the outer shaft (1) and mounted in such a way that it can rotate in relation to the outer shaft (1). Said camshaft also comprises first cams (3a) arranged on the outer shaft (1) in a rotationally fixed manner, and second cams (3b) that are arranged on the outer shaft (1) and fixed to the inner shaft (2). According to the invention, the first shaft and the second shaft are supported against each other in the axial direction (x) by means of a formfitting shape (5), the first shaft, seen in the axial direction (x), comprising a first contact surface (6a) on one side of the formfitting shape (5) and a second contact surface (6b) on the other side of the formfitting shape (5), for supporting the second shaft in a rotationally movable manner by means of the formfitting shape (5).
摘要:
OBJECT: To provide a phase varying apparatus for automobile engine capable of smoothly varying the phase angle of a camshaft relative to a drive rotor MEANS OF ACHIEVING THE OBJECT: The inventive phase varying apparatus comprises: a drive rotor supported by a camshaft and driven by a crankshaft a first control rotor integral with the camshaft; a first torquing mechanism for providing the first drive rotor with a torque in one direction, and a reverse rotation mechanism for proving the first control rotor with a torque in the opposite direction The reverse rotation mechanism comprises of a first radius-decreasing guide groove formed in the control rotor, a crank member adapted to rotate about a position offset from the rotational axis of the drive rotor, and a first pin mechanism mounted on the crank member and movable in the radius-decreasing guide groove, and a second operative mechanism for rotating the first control rotor in the opposite rotational direction relative to the drive rotor. A phase varying apparatus capable of smoothly varying the phase angle of a camshaft relative to a drive rotor by comprising: a drive rotor supported by a camshaft and driven by a crankshaft; a first control rotor integral with the camshaft; a first torquing mechanism for providing the first drive rotor with a torque in one direction, and a reverse rotation mechanism for proving the first control rotor with a torque in the opposite direction, wherein the reverse rotation mechanism comprises a first radius-decreasing guide groove formed in the control rotor, a crank member adapted to rotate about a position offset from the rotational axis of the drive rotor, and a first pin mechanism mounted on the crank member and movable in the radius-decreasing guide groove, and a second operative mechanism for rotating the first control rotor in the opposite rotational direction relative to the drive rotor.