摘要:
A semiconductor type acceleration sensor comprises a flexible printed circuit board on which a semiconductor type detector chip section is mounted. The detector chip is formed with openings therethrough overlapping an opening formed in a rear-side base plate of the flexible printed circuit board such that the detector chip section is supported only by a bridge portion. In case of excess input in an acceleration direction, elastic deformation of the bridge portion and a bending portion of the flexible printed circuit board provide absorption of the excess input for protecting the detector chip section.
摘要:
There is proposed an assembly for damping vibrations in a torque transmitting arrangement between an engine and an input part of a transmission. The assembly comprises a first flywheel connected to the engine, and a second flywheel connectable to the input part of the transmission. The first and second flywheels are rotatable relative to each other. At least one damper includes spring means operative to resiliently oppose rotation of the flywheels relative to each other. The assembly also comprises at least one lock-up mechanism including centrifugal force responsive means operative to prevent rotation of the flywheels relative to each other after the damper has become idle when rotation of the engine is lower than a predetermined speed value.
摘要:
A valve timing control system includes of a cylindrical sprocket driven through a timing chain by a crankshaft of the engine. An arm is fixed to one end section of the camshaft and located inside the sprocket in a manner to extend generally diametrically. First and second plungers are slidably disposed respectively in first and second cylindrical bores formed in the sprocket. A hydraulic pressure chamber is defined between the bottom portion of each plunger and the bottom wall of the cylindrical bore so as to be supplied with a hydraulic pressure from a hydraulic pressure source. Each plunger is projectable toward the arm upon supply of the hydraulic pressure to the corresponding hydraulic pressure chamber thereby to cause the arm to rotate relative to the sprocket. Projections of the first and second plungers induce the rotational movements of the arm in opposite directions relative to the sprocket, respectively. The rotational movements of the arm cause the camshaft to undergo relative rotation which advances or retards the valve timing of the intake and/or exhaust valves.
摘要:
A spring seat is disposed about a tube which forms part of a shock absorber and supported in a predetermined position thereabout. The tube is subject to press bulge formation so that a portion of the tube becomes force fitted against a portion of the spring seat. Dies can be used to induce the formation of one or more projections which prevent the spring seat from moving axially along the tube. The force fit prevents relative rotation.
摘要:
A main rocker arm which is pivotally mounted on a rocker shaft has one or more sub-rocker arms pivotally mounted thereon. The main rocker arm is arranged to synchronously open and close two poppet valves. Each of the sub-rocker arms can be selectively locked to the main one by way of hydraulically operated plunger arrangements. The main rocker arm is provided with a roller type cam follower which follows a low speed cam. The sub-rocker arms are provided with followers which engage high or very high speed cams. Lost motion springs which maintain the sub-rocker arms in contact with the cams are mounted on the main rocker arm.
摘要:
An apparatus for controlling the damping coefficient of shock absorbers which are associated with the road wheels of the vehicle, produces control signals using one or more of a bouncing rate, a pitching rate and a rolling rate value which is filtered out of a plurality of outputs provided by a plurality of acceleration sensors which are each located in proximity of a shock absorber. The control signal can be modified using the outputs of weight sensors which are used to derive the relative velocities of the road wheels with respect to the vehicle body.
摘要:
A cooling arrangement for a piston head of an internal combustion engine including a plurality of cooling channels built-in to the piston head. Cooling medium induction paths and draining paths are formed through the piston head for introducing and draining cooling medium into and from the cooling channels. A single cooling medium injection nozzle is disposed within the engine cylinder. The cooling medium injection nozzle is oriented to inject the cooling medium so that an axis of a jet flow of the cooling medium injected from the cooling medium injection nozzle is aligned with the axes of the cooling medium induction paths at different stroke positions of a piston during an engine revolution cycle.
摘要:
As a torque transmitting member, an annular resilient disc interconnects a crankshaft and an annular flywheel. The crankshaft has an axially extending cylindrical wall in opposed and spaced relationship to an inner peripheral wall of the annular flywheel. For reducing vibrations of annular resilient disc, an elastic annular body has an inner peripheral wall fixed to the crankshaft and an outer peripheral wall opposed to the inner peripheral wall of the flywheel. A heat insulating ring or heat insulating pieces are provided to reduce transmission heat from the flywheel to the elastic annular body. Alternatively, a heat insulating space or spaces may be provided.
摘要:
In a piston, a circumferential groove for a piston ring, a knock pin being inserted in a bore set radially relative to the piston ring groove. A head end of the knock pin protrudes into a space defined by the piston ring groove for interposing between ends of a piston ring for preventing turning, or rotation, thereof. Means for preventing mechanical interference between the walls of the piston ring groove and the head end of the knock pin is provided.
摘要:
A suspension control system for an automotive vehicle is provided in which a movement of a sprung mass velocity is monitored, when the magnitude of the sprung mass velocity is below a predetermined threshold value, a control unit outputs a control signal to a pulse motor to vary the position of an adjuster so that one of extension and compression stroke sides of a position member of a shock absorber, whose direction is the same as that of the sprung mass velocity provides a high damping coefficient, and when the magnitude of the sprung mass velocity is above the predetermined threshold value, a control constant for the damping coefficient is changed toward a high damping sensitivity range until the sprung mass velocity exceeding the predetermined threshold value is reduced below another predetermined threshold value, a magnitude of the other predetermined threshold value being lower than that of the predetermined threshold value.