摘要:
A valve operating mechanism for an internal combustion engine wherein a plurality of rotatable cams have different cam profiles for operating an intake or exhaust valve differently in high and low speed ranges of the engine. A plurality of rocker arms are selectively connected or disconnected for transmitting the appropriate cam lift to the valve depending on the engine speed range. The cam profiles have dampening areas at the start of opening and the finish of closing of the valve. The dampening areas of the high speed cam have a smaller rate of change than the dampening areas of the low speed cam to minimize the possibility of engagement by a rocker arm with a cam for one speed while the engine is operating at another speed by another cam and rocker arm.
摘要:
A device for switching valve operation modes in an internal combustion engine with a rotatable camshaft having cams integral therewith, valves disposed in intake or exhaust ports of the combustion chamber and normally urged closed by a spring, and the valves being openable by the cams through a plurality of rocker arms disposed adjacent to each other for imparting the cam lifts to the valves. A coupling mechanism selectively connects and disconnects the rocker arms by means of pistons in aligned guide holes in the rocker arms movable between positions to either extend across the adjacent sides of the rocker arms or be aligned with such sides. A solenoid is provided in one rocker arm and surrounds a piston to selectively cause movement of that piston. Springs urge the pistons to the position controlled by the solenoid.
摘要:
Apparatus for controlling the operation of intake or exhaust valves of an internal combustion engine in which cam-driven rocker arms that operate the valves are selectively connected or disconnected for movement in unision or for independent movement in order to open and close the valves in accordance with the various modes of engine operation. Control of the valves is produced by the cooperative effect of hydraulic pressure and variable spring forces whereby more accurate valve operation over a greater number of engine operating modes is achieved.
摘要:
A wiring board includes a substrate having first and second surfaces, a first penetrating hole penetrating through the substrate, a first through-hole conductor formed on the inner wall of the first hole, a filler filled inside the first conductor and forming a second penetrating hole, and a second through-hole conductor formed in the second hole, a first conductive circuit on the first surface of the substrate, a second conductive circuit on the second surface of the substrate, a first conductive portion on one end of the second hole, and a second conductive portion on the opposite end of the second penetrating hole. The first conductor is connecting the first circuit and the second circuit. The second conductor is made of a conductive material filled in the second hole and is connecting the first conductive portion and the second conductive portion.
摘要:
A wiring board includes a substrate having a first penetrating hole penetrating through the substrate, a first through-hole conductor formed on the inner wall of the first penetrating hole, a filler filled inside the first conductor and forming a second penetrating hole, and a second through-hole conductor formed in the second penetrating hole, a first conductive circuit formed on a first surface of the substrate; a second conductive circuit formed on a second surface of the substrate; a first conductive portion formed on one end of the second penetrating hole, and a second conductive portion formed on the opposite end of the second penetrating hole. The first conductor is connecting the first and second circuits. The second conductor is connecting the first and second conductive portions. The first circuit has the thickness which is set greater than the thickness of the first conductive portion.
摘要:
An engine mounting structure for a motorcycle including a plurality of resilient members for connecting the engine to the vehicle body frame. The resilient member located at the position nearest to the rear wheel is given a resilient property being uniform in the vertical and fore-and-aft directions, and remaining resilient members are given a non-uniform resilient property being hard in the vertical direction and flexible in the fore-and-aft direction. With this configuration, even when the rear wheel moves horizontally in the lateral direction, the influence is attenuated while being transferred to the vehicle body frame. When a resilient member being hard in the vertical direction is used, the behavior of the rear wheel such as the vertical swinging motion or lateral turn can immediately be transferred to the vehicle body frame. Therefore, drivability of the motorcycle during high-speed driving is improved.
摘要:
Apparatus for maintaining the cam follower for operating a valve for an internal combustion engine in biased engagement against the cam includes a first spring operative to bias the cam follower under a low speed engine operating condition and a second spring series-connected to the first spring and having a spring constant greater than that of the first spring operative to bias the cam follower under a high speed engine operating condition.
摘要:
A lubricating apparatus in an internal combustion engine of the horizontal type in which a main oil gallery for feeding oil to engine portions to be lubricated is provided substantially parallel to the engine crank shaft in the bearing cap secured to engine block for rotatably supporting the crank shaft, and an oil filter is provided on the bearing cap at a central portion in the direction of the crank shaft. The oil pump is provided on one end of the crank shaft and oil passages are formed in the bearing cap for conducting the oil from the oil pump to the oil filter and then from the oil filter to the central portion of said main gallery.
摘要:
A method for manufacturing a substrate with a metal film includes preparing an insulative substrate having the first surface and the second surface on the opposite side of the first surface, forming in the insulative substrate a penetrating hole having the inner wall tapering from the first surface of the insulative substrate toward the second surface, forming a layer of a composition containing a polymerization initiator and a polymerizable compound on the inner wall of the penetrating hole, irradiating the layer of the composition with energy such that a polymer is formed on the inner wall of the penetrating hole, applying a plating catalyst on the polymer, and forming a plated-metal film on the inner wall of the penetrating hole.
摘要:
A wiring board includes a substrate having first and second surfaces and a first penetrating hole through the substrate, a first conductive circuit on the first surface of the substrate, a second conductive circuit on the second surface of the substrate, an interlayer insulation layer on the substrate and the first or second circuit, and a third conductive circuit on the interlayer layer. The interlayer layer has a via conductor in the interlayer layer and connecting the third circuit and the second conductor. The substrate has a first through-hole conductor connecting the first and second circuits and on the inner wall of the first hole, a filler filled inside the first conductor and forming a second penetrating hole, and a second through-hole conductor in the second hole. The via conductor is shifted from the center of the second conductor in the direction parallel to the first surface of the substrate.