Solenoid

About: Solenoid is a research topic. Over the lifetime, 19278 publications have been published within this topic receiving 114721 citations.

Solenoid operated switching device.

Abstract: A switching device (FIGS. 5 A and 5B) employs as actuator a bistable solenoid which includes a plunger (16) movable within a winding (12) between end positions in each of which it is held by permanent magnets (18, 20). The plunger (16) of the actuator is engageable with an insulated lever (86) which in turn actuates a contact blade (76) via a spring (108). The lever may be cranked, and may have an extension (90) outside of the casing (70) to enable the device to be manually operated or to provide a visual indication of the state of the switch. Other types of solenoid may be employed as the actuator.

Exhaust gas purifier for internal combustion engine

Abstract: PURPOSE:To attain a high purification efficiency through the utilization of the oxygen retaining function of a ternary catalyst, by connecting the negative pressure of a variable-Venturi-part carburetor through a solenoid valve which is opened and closed at a constant frequency of about 1Hz to 2Hz and by determining the cross-sectional area of the valve so that the average of the air-fuel ratio of a mixture is nearly equal to a theoretical air-fuel ratio and the fluctuation width of the actual air-fuel ratio is about + or -0.2 to + or -1.0 as to the average. CONSTITUTION:A solenoid drive circuit 60, which generates rectangular pulses of 1Hz to 2Hz in frequency, energizes a solenoid 56 to open a valve port 53 to introduce air into a negative pressure chamber 20 from an air filter 51. Consequently, a suction piston 8 is moved toward a Venturi part 13 to intensify the negative pressure in it to cause a sucking action for fed fuel. For that reason, a mixture is thickened. A thick mixture and a thin mixture are thus alternately introduced into an engine cylinder. The dimensions of the valve port 53 are determined so that the average of the air-fuel ratio of the mixture is nearly equal to a theoretical air-fuel ratio and the fluctuation width of the actual air-fuel ratio is about + or -0.2 to + or -1.0 as to the theoretical ratio. This results in providing a high purification efficiency through the oxygen retaining function of a ternary monolithic catalyst 5.

Solenoid manifold assembly

Abstract: A sandwich solenoid manifold assembly is provided which includes a steel plate having a plurality of fluid passages formed therethrough, a plastic manifold including a plurality of worm passages formed in a lower surface thereof and a plurality of insert receiving holes provided therein. The lower surface of the plastic manifold being connected to the steel plate. A plurality of steel inserts are inserted in the through holes in the plastic manifold, the steel inserts having a first end provided with a radial flange which abuts against a surface of the plastic manifold and a second end which abuts against the steel plate. The sandwich solenoid manifold assembly is less expensive to manufacture in comparison with conventional die cast solenoid manifolds.

Solenoid having increased throw capability

Abstract: A solenoid for actuating a print wire normally biased against the impact direction by novel spiral spring means. Energization of the solenoid coil rapidly moves the print wire in the impact direction against the bias of the spring. Release of the energy supplied to the solenoid coil causes very rapid return of the print wire to the non-printing (i.e., quiescent) position. The novel spiral spring structure experiences a substantially linear spring force upon deflection and provides significantly increased deflection as compared with conventional structures to allow for substantially rapid initial acceleration of the print wire in the impact direction while providing for rapid return of the print wire to the quiescent condition. The mounting of said spring reduces bouncing on overshooting.