摘要:
A flow control valve includes a hollow cylinder 32 having an open end and a fluid flow port 31 formed in its circumferential wall, a solenoid coil disposed around the cylinder, and a valve member 41 slidable within the cylinder in response to an amount of power supplied to the solenoid coil for adjusting an opening area of the fluid flow port to control the flow rate of the fluid flowing through the fluid flow port and the open end of the cylinder. A protective inner-diameter portion 32a formed in the open end of the cylinder is provided in association with a fluid flow path including the fluid flow port and the open end of the cylinder for preventing any foreign matters entrained in a fluid from being caught in the clearance defined between the hollow cylinder and the valve member by providing an annular clearance between the cylinder and the valve member. A reduced outer-diameter portion 44a axially partially extending from one end of the valve member or a dam plate 10, 11 disposed in the fluid flow path for defining a labyrinth flow path upstream of the fluid flow port may also be provided. At least a cylindrical wall 35, 36 having the fluid flow port of the hollow cylinder may be made of a molded resin.
摘要:
A device for controlling fuel injection preventing the wasteful consumption of electric power and expanding the dynamic range for controlling the amount of fuel. The device comprises fuel pressure regulator means (4) for adjusting fuel pressure (Pf) of the fuel to be injected, injector drive means (5) including an electromagnetic coil for opening the valve body of the injector (2), and injection control means (1) for controlling the fuel regulator means and the injector drive means depending upon the operating conditions (Ne, Qa and Pf), wherein, the injection control means includes an injection timer (13) for setting the exciting time for controlling the driving time for opening the valve body by controlling the exciting current and the exciting time for the electromagnetic coil, an over-excitation timer (14) for feeding an over-exciting current, and an over-exciting period control unit (15) for variably setting the initial count value of the over-excitation timer depending upon the fuel pressure, and wherein the over-exciting period is variably set to be a minimum required limit that increases with an increase in the fuel pressure.
摘要:
A cup-shaped spring holder having a flange on the outer periphery on the open end side is secured on the end portion of a valve shaft which protrudes outwardly from a carburetor barrel, with a clearance for coil insertion provided between the barrel and the open-end side. An outer torsion coil spring is fitted in the aforementioned spring holder to restrain an axial shift of the spring. And one end of an inner torsion coil spring fitted on the aforementioned shaft end portion is led out through the aforementioned clearance and retained by a spring retainer on the aforesaid barrel. Because of the above-described constitution, this invention features simple construction, easy manufacture, increased mechanical strength, a less number of components parts required, easy assembly, and improved valve shaft strength.
摘要:
Grooves 6 having a length larger than the diameter of shaft 2 are formed in both surfaces of throttle valve 3 between mounting screws 4 and the inner circumferential wall of throttle body 1, perpendicular to the shaft axis, to capture any excess adhesive applied to the screws and migrating outwardly therefrom.
摘要:
An apparatus for detecting the opening of the throttle valve of an internal combustion engine. The apparatus comprises a throttle body constituting a portion of a suction passage, a valve shaft held to the throttle body, a throttle valve for controlling the flow of air inside the suction passage, and a sensor fixed to the throttle body. The sensor has a driving shaft one end of which is disposed outside the case of the sensor. A U-shaped engaging member having two legs is fixed to this one end of the driving shaft. A disklike engaging member having two grooves is fixed to one end of the valve shaft. The two legs are fitted in the two grooves.
摘要:
A proportional flow control valve in which a valve seat is provided in the proportional flow control valve body, a valve piece is slidably mounted on a movable iron core, and is urged toward the valve seat by an elastic member disposed between the valve piece and the movable iron core, and a holder is fixedly mounted on the movable iron core so as to limit the movement of the valve piece toward the valve seat caused by the elastic member. The proportional flow control valve is high in reliability in which the leakage of fluid is substantially zeroed even when fully closed, and the difficulties are eliminated that, when its flow rate adjusting means engages with or disengages from the valve seat, hammering sounds are produced and the flow characteristic is adversely affected, and which is simple in adjustment and is maintained correct in flow characteristic at all times.
摘要:
A control valve device for controlling flow rate, comprises: valve holder (31) linearly moved forward and backward by a driving unit (2), said valve holder serving as a converting mechanism for converting a rotary motion of driving means into a linear motion; valve piece (32) being supported by the front end of the valve holder while movable back and forth direction, and fitted into a valve seat (1b) when the valve holder advances toward the valve seat; and a spring (37) interposed between the valve piece and the valve holder for urging valve piece toward the valve seat.
摘要:
A cooling water temperature controlling apparatus for an internal combustion engine comprises a butterfly valve placed in a cooling water passage for the internal combustion engine at a position between the inlet port of a radiator and the inlet port of a radiator bypass pipe, and a stepper motor connected to the butterfly valve through a reduction gear having a worm gear wheel so as to adjust a degree of opening of the butterfly valve depending on the temperature of cooling water.
摘要:
A method of manufacturing a sliding part includes: an injection molding step of injection-molding a compacted member of a molding compound which is a mixture of powder material equivalent to SUS440C, graphite carbon corresponding to an oxygen content of the material, and a binder; a degreasing step of heating the compacted member thus obtained by the injection molding step under a neutral atmospheric condition to remove substantially all of the binder from the compacted member; and a baking step of heating the compacted member which is degreased under a vacuum condition of 0.1333 Pa or less from a room temperature up to 1000° C. to reduce an oxygen content of the compacted member to 0.02% or less by the reaction of C+O→CO, and then heating the compacted member under an argon atmospheric condition of 133.3 to 3999 Pa for two hours after the temperature is increased up to 1250° C.
摘要:
An idling speed control valve for an internal combustion engine is disposed bypassing a throttle valve arranged at an intake passage of the engine, and proportionally controls the quantity of air flowing in the bypass passage based on an output of an electronic control unit including an idling revolution number control function. The valve is controlled by an electromagnetic coil of a solenoid device, and the coil is made of a brass series alloy wire material.