Topic
Solenoid
About: Solenoid is a research topic. Over the lifetime, 19278 publications have been published within this topic receiving 114721 citations.
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Patent•
05 Oct 1994TL;DR: In this paper, a parking brake system is provided which includes a dual solenoid operated valve (20) located in series with the emergency brake control valve (18) of a hydraulically operated brake system.
Abstract: A parking brake system is provided which includes a dual solenoid operated valve (20) located in series with the emergency brake control valve (18) of a hydraulically operated brake system The dual solenoid valve is operable to either one of two mechanical detent positions (38) so that positioning of the valve is retained in the event of loss of power The dual solenoid valve is controlled by the vehicle operator from the transmission console (40) and removes fluid pressure from the brakes when actuated to a PARK position An electronic control unit (46) is provided for sensing the speed of the vehicle and the pressure in the hydraulic line to the brakes and provides a PARK enabling signal when the vehicle speed is below a predetermined amount When a gear is selected at the console the dual solenoid valve is actuated to a position permitting fluid pressure, to be applied to the brakes and effectively returns control of the brakes to the emergency brake control device A pressure sensor (48) is provided in the line (16) to the brakes and is used to provide feedback to the driver and to control transmission shifting
54 citations
Patent•
20 Nov 1998
TL;DR: Proportional variable force solenoid valve for controlling the pressure of a fluid in a fluid control system comprises a solanoid housing having therein a soleneoid coil, an armature movable in response to electrical current applied to the soleneoids coil, and a biasing spring for biasing the armature in a direction to establish a valve fluid pressure response to solenoids coil current as mentioned in this paper.
Abstract: Proportional variable force solenoid valve for controlling the pressure of a fluid in a fluid control system comprises a solenoid housing having therein a solenoid coil, an armature movable in response to electrical current applied to the solenoid coil, and a biasing spring for biasing the armature in a direction to establish a valve fluid pressure response to solenoid coil current. An inner armature end cooperates with or engages a damping member residing in a fluid damping chamber to reduce non-linear valve responses resulting from pressure oscillations in the fluid control system.
54 citations
TL;DR: In this article, a 12-meter-long solenoid with 55 corrugation cells with mirror ratio B max /B min = 4.8/3.2 T was used for fast ion heating, issues of plasma stability and confinement were discussed.
Abstract: Recent results of the experiments at GOL-3 facility are presented. In present configuration of the device, plasma with a density of 10 14 ÷10 16 cm -3 is confined in a 12-meter-long solenoid, which comprises 55 corrugation cells with mirror ratio B max /B min =4.8/3.2 T. The plasma in the solenoid is heated up to 2-4 keV temperature by a high power relativistic electron beam (∼1 MeV, ∼30 kA, ∼8 μs, ∼120 kJ) injected through one of the ends. Mechanism of experimentally observed fast ion heating, issues of plasma stability and confinement are discussed.
54 citations
TL;DR: In this paper, a sliding mode control law for robotic systems that use on/off (solenoid) pneumatic actuators is presented for precise position control and low switching (open-close) activity of the valves.
54 citations
TL;DR: A superconducting magnet assembly for an ECR (Electron Cyclotron Resonance) ion source at the 88-inch cyclotron at LBL is described in this article, which achieves a field on axis of 4 T and 3 T at the mirrors with 0.4 T between and a sextupole field of 2.0 T at 15 cm diameter in the confinement volume.
Abstract: A superconducting magnet assembly has been built for an ECR (Electron Cyclotron Resonance) ion source at the 88-inch cyclotron at LBL. Three 34-cm ID solenoids provide axial plasma confinement and a sextupole assembly in the solenoid bore provides radial stability. Two large solenoids are spaced 50 cm. Apart with a smaller opposing solenoid between. The sextupole assembly is 92 cm long with winding inner diameter of 20 cm. And outer diameter of 27.2 cm. The design goal is to achieve a field on axis of 4 T and 3 T at the mirrors with 0.4 T between and a sextupole field of 2.0 T at 15-cm diameter in the confinement volume. Each solenoid uses rectangular conductor wish copper/SC ratio of 4; the three coils are wet-wound on a one-piece aluminum bobbin with aluminum banding for radial support. The sextupole uses rectangular conductor with copper/SC ratio of 3. Each of the 6 coils is wet-wound with filled epoxy on a metal pole; the ends of the pole are aluminum and the central 34-cm is iron to augment the sextupole field. The six coils are assembled on a 20-cm-OD stainless steel tube with a 1.4-cm thick 30.0-cm OD aluminum tube over the assembly for structural support. Thin metal bladders are expanded azimuthally between each coil and axially at tire ends to pre-load the assembly. The sextupole assembly fits inside the solenoid bobbin, which provides support for the magnetic forces. The magnet exceeds design requirements with minimum training.
54 citations