摘要:
A commutator has such a construction that a flange having an outside diameter larger than the outside diameter of a cylindrical body is provided integrally with the cylindrical body in the vicinity of one end of the cylindrical body; guide grooves formed in a circular arc shape in cross section are provided on the flange at the boundary of the flange to the cylindrical body; engaging pieces passing through the guide grooves are provided on one end of a commutator segment; and engaging pieces are caused to deform plastically to fixedly fit the engaging pieces to the flange.
摘要:
A variable swirl siamese type intake port structure for an internal combustion engine cylinder head includes a first generally straight intake passage which leads to a first intake port and a second generally helical intake passage which leads to a second intake port which is formed with a helical end vortex portion. A control valve is fitted in the first generally straight intake passage at an upstream portion thereof so as to control its flow resistance. A bypass passage opens from a point downstream of the control valve in the first generally straight intake passage to the helical end vortex portion of the second intake port. And a downstream portion of the bypass passage is communicated to a downstream portion of the second generally helical intake passage. Thereby the resistance to flow of air-fuel mixture of the generally helical intake passage is diminished, and the engine volumetric efficiency and the maximum attainable engine output power are increased.
摘要:
An engine comprising an intake port which has a separating wall projecting downwardly from the upper wall of the intake port. The separating wall defines a helical portion, an inlet passage portion tangentially connected to the helical portion, and a bypass passage interconnecting the inlet passage portion and the helical portion. The side wall of the helical portion has a slightly inclined portion located near the outlet portion of the bypass passage and expanding towards the separating wall so as to define a narrow passage portion between the inclined portion and the separating wall. A rotary valve is arranged in the bypass passage and is actuated by a vacuum-operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of the engine is increased beyond a predetermined value.
摘要:
An engine comprising an intake port which has a separating wall projecting downward from the upper wall of the intake port. The separating wall defines a helical portion, an inlet passage portion tangentially connected to the helical portion, and a bypass passage interconnecting the inlet passage portion to the helical portion. A rotary valve is arranged in the bypass passage and actuated by a vacuum operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of an engine is increased beyond a predetermined value. The separating wall has a height which is equal to approximately half the height of the intake port in the vicinity of the rotary valve.
摘要:
An internal combustion engine has a cylinder head formed with a wedge shaped cylinder head recess which has on its one side closer to a spark plug a steeply inclined roof surface of about 38.degree. to 40.degree. inclination and on its other side a gently inclined roof surface of about 5.degree. to 20.degree. inclination formed with an intake valve opening, and a piston formed with a piston recess which generally mates with the cylinder head recess and which has on its one side closer to the spark plug an inclined side surface of about 45.degree. inclination. The planar surface portion of the piston crown and the planar surface portion of the cylinder head on opposite sides of the recessed portions mutually define a relatively large squish area on the side of the gently inclined roof surface and a relatively small squish area on the side of the steeply inclined roof surface. A helical port is connected to the intake valve opening so as to generate a swirl flow of air-fuel mixture in the combustion chamber.
摘要:
An engine comprising an intake port which has a separating wall projecting downward from the upper wall of the intake port. The separating wall defines a helical portion, an inlet passage portion tangentially connected to the helical portion, and a bypass passage interconnecting the inlet passage portion to the helical portion. A rotary valve is arranged in the bypass passage and actuated by a vacuum operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of an engine is increased beyond a predetermined value. A conical shaped groove is formed on the bottom wall of the intake port. The lower end of the rotary valve is located in the groove.
摘要:
A helically-shaped intake port comprising a helical portion and an inlet passage portion which is tangentially connected to the helical portion and extends so as to be slightly curved. The intake valve is arranged at the outlet open end of the helical portion. The side wall of the inlet passage portion, which is located near the axis of the intake valve, has on its upper portion an inclined wall portion which is arranged to be directed downwards. A projection projecting downwards and arranged to enclose the valve stem of the intake valve is formed in one piece on the upper wall of the helical portion. The projection has a maximum thickness at a position near the cross point of the circumferential wall of the projection and the straight line passing through the axis of the intake valve, and extending in parallel with a plane containing the inlet open end of the inlet passage portion. The upper half of the inclined wall portion of the side wall of the inlet passage portion is tangentially connected to the circumferential wall of the projection, which has the maximum thickness.
摘要:
An internal combustion engine comprises a first raised portion formed on the inner wall of the cylinder head, a second raised portion formed on the top face of the piston at a position opposite to the first raised portion with respect to the axis of the piston, and a third raised portion formed on the inner wall of the cylinder head above the second raised portion. A first flat squish area is formed between the flat peripheral top face of the piston and the flat bottom face of the first raised portion. A second spherical shell shape squish area is formed between the spherical bottom wall of the third raised portion and the spherical rear face of the second raised portion. A secondary throttle valve is arranged in the intake passage located downstream of the throttle valve of a carburetor. A secondary intake passage is branched off from the intake passage located between the secondary throttle valve and the throttle valve of the carburetor and opens into the intake port at a position near the intake valve. The secondary throttle valve is closed when the engine is operating under a light load, while the secondary throttle valve is opened when an engine is operating under a heavy load.
摘要:
An intake apparatus of an engine includes: a first intake passage supplying fresh air to a cylinder; a second intake passage arranged near the first intake passage, and supplying fresh air to the cylinder; a first intake valve opening and closing the first intake passage at an aperture of the first intake passage; a second intake valve opening and closing the second intake passage at an aperture of the second intake passage. An opening timing of the first intake valve of the intake apparatus advances relative to a top dead center, and a valve lift amount of the first intake valve differs from that of the second intake valve, and there is a period while the valve lift amount of the first intake valve is larger than that of the second intake valve, in an intake stroke.
摘要:
An electronic component is provided with a substrate, a thin-film element layer provided on the substrate, first and second bump electrodes, provided on a surface of the thin-film element layer, and an insulator layer provided between the first bump electrode and the second bump electrode. The thin-film element layer contains a first spiral conductor which is a plane coil pattern. The first bump electrode is connected to an internal peripheral end of the first spiral conductor. The second bump electrode is connected to an external peripheral end of the first spiral conductor. Both of the first and second bump electrodes, have a first exposure surface exposed to a principal surface of the insulator layer and a second exposure surface exposed to an end face of the insulator layer.