1052results about "Piping arrangements" patented technology

A check valve which is positioned in the vacuum air line of an internal combustion engine. The check valve includes a single-piece valve body having an outlet port and two or more inlet ports, with one outlet port located substantially in line with the inlet port and connected by a venturi tube. The second inlet port is separated from the main air flow line by the valve stem and a diaphragm which allows communication there between and prevents back pressure. The second inlet port communicates with the outlet port through the valve stem and a second venturi tube which provides a vacuum boost to a device, usually vehicle brakes, connected to the inlet. The use of seal diaphragms having a non-constant radius allows for faster recovery time for replenishment than prior art devices.

A vacuum enhancing check valve for direct connection to a vehicle brake booster which increases the partial vacuum provided thereto and restricts possible air back flow into the brake booster. The valve comprises a venturi for reducing the pressure of air induced to flow between a first air inlet and an air outlet by a partial vacuum at a vehicle engine's intake manifold. By significantly reducing the air pressure, the valve enhances the partial vacuum available for provision to the brake booster. The venturi is also in air communication with a second air inlet directly attachable to the brake booster such that the air pressure at the second air inlet tends toward the enhanced partial vacuum within the venturi. A valve seat and seal member within the valve are cooperative to allow air flow from the second air inlet toward the venturi, but not in the reverse direction.

The embodiments disclosed herein provide a check valve aspirator including a venturi pipe having a converging section with a converging inlet and a converging outlet, and a diverging section with a diverging inlet and a diverging outlet. The converging outlet is in fluid communication with the diverging inlet. An outlet channel is in fluid communication with the venturi pipe and has an outlet port. A ratio of a diameter of the converging section outlet to a diameter of the outlet port is less than 0.4.

Disclosed is an accumulator comprising a cylindrical shell including a cylindrical portion, a partitioning member for partitioning the interior of the shell into a hydraulic chamber and a gas chamber, and a port including a hydraulic fluid flow path for communicating the exterior of the shell and the hydraulic chamber. The variation of the pressure of a hydraulic fluid flowing into the hydraulic chamber is accommodated by expansion and compression of a gas in the gas chamber according to expansion and contraction of the partitioning member. The port is approximately airtightly inserted into the cylindrical portion of the shell, and is welded to an outer circumference of the cylindrical portion by means of welding.

Disclosed is an accumulator comprising: a pressure vessel; an elastic bellows in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path having an opening communicating with the interior and an exterior of the pressure vessel; a valve connected to a movable end of the bellows to operatively close the opening according to elastic motion of the bellows; and a hydraulic chamber partitioned from a gas chamber formed in an interior of the bellows containing the compressed gas. The valve comprises an upper surface which can cover the opening, and plural circular protrusions which surround the entire circumference of the opening and can closely contact the circumference of the opening.

A hydraulic block for a hydraulic power unit of a hydraulic vehicle brake system includes a main brake cylinder bore and an intake that are integrated to form a pedal travel simulator.

A brake / clutch master cylinder for a motorcycle / bicycle or the like, with a body which is produced by moulding of plastics material reinforced by glass fibre without the need for machining operations or metal inserts and which forms, together with the cylindrical shell of the master cylinder, a hydraulic-fluid reservoir, a coupling sleeve for a male quick-fit hydraulic connector, and a seat for fixing to a handlebar, the body having a high degree of structural stiffness with respect to working stresses and adequate resilience for impact stresses imparted to the body by means of the hand operating lever.

Metal tubes, such as the small diameter metal tubes used in hydraulic braking systems, are connected to hoses also used in such systems by fittings which are configured to receive radially projecting beads on the metal tubes. Each of the fittings includes a body portion with a bore therethrough and a crimping collar which is unitary with the body portion. The body portion receives an insertion end of the tube therethrough, which insertion portion projects into the unitary crimping collar. A radially extending bead on the tube is received in a recess adjacent the bore through the body portion. In one embodiment, the tube is held in place by another bead which is seated in another recess at the opposite end of the bore.

A check valve which is positioned in the vacuum air line of an internal combustion engine. The check valve includes a single-piece valve body having an outlet port and two or more inlet ports, with one outlet port located substantially in line with the inlet port and connected by a venturi tube. The second inlet port is separated from the main air flow line by the valve stem and a diaphragm which allows communication there between and prevents back pressure. The second inlet port communicates with the outlet port through the valve stem and a second venturi tube which provides a vacuum boost to a device, usually vehicle brakes, connected to the inlet.

The invention discloses a brake energy recovery system with a pedal travel simulator, and a control method of the brake energy recovery system and aims to solve the problem that pedals are felt different from conventional vehicles when brake energy recovery systems of electric and blade electric vehicles recover energy. A hydraulic brake subsystem comprises a brake pedal, a vacuum booster, a main brake cylinder, a liquid storage cup, a normally-open electromagnetic valve, a normally-closed electromagnetic valve, the pedal travel simulator, a hydraulic adjusting unit, a vacuum pump and a one-way valve. The vacuum pump is connected with the vacuum booster, the pedal travel simulator is connected with the liquid storage cup through the one-way valve, the upper end of the brake pedal is in ball joint riveting with the vacuum booster, the main brake cylinder is connected with the liquid storage cup,, a front cavity of the main brake cylinder is connected with an A port of the normally-open electromagnetic valve, a port B of the normally-open electromagnetic valve is connected with a port C of the normally-closed electromagnetic valve and a port E of the hydraulic adjusting unit, a port D of the normally-closed electromagnetic valve is connected with the pedal travel simulator, and a rear cavity of the main brake cylinder is connected with a port F of the hydraulic adjusting unit. The invention further provides the control method of the brake energy recovery system.

A valve device for brake control of a different pressure medium-operated vehicle brake systems comprises a housing that has pressure medium ducts. A relay valve provides a pneumatic control pressure, which is fed to the relay valve via at least one of the pressure medium ducts at a higher flow rate. At least one insert is pneumatically connected to at least two of the pressure medium ducts, which can be pneumatically connected to each other by the insert. The two pressure medium ducts define a pressure medium path, the profile of which differs based on the housing that is in each case selected and / or switched based on the selected insert. The housing is selected from a set of housings having different pressure medium ducts, in particular bores, but which are otherwise essentially similar. The insert is selected from a set of different inserts.

The invention provides a brake control apparatus that improves the controllability of a vehicle in the control for restraining slip of the wheels. The brake control apparatus includes: wheel cylinders that apply braking force individually to wheels by supplying a working fluid; retention valves that are provided respectively upstream of the wheel cylinders and that are opened and closed so as to restrain slip of the wheels; a common control valve provided upstream of the retention valves to supply the working fluid to the wheel cylinders; and a control portion that controls the common control valve by different control laws to restrain fluctuations in pressure on a primary side of the retention valves caused by fluctuations in a capacity to which the working fluid from the common control valve is supplied, by opening or closing of the retention valves.

The invention discloses an ABS urgent relay valve, which consists of electromagnetic adjusting valve and relay valve, wherein the relay valve is fixed on the bottom of electromagnetic adjusting valve with inlet of master cylinder connecting inlet pipe through electromagnetic valve, which controls cavity C, the vent top of relay valve connects depression channel through electromagnetic adjusting valve, the relay valve adopts urgent relay valve with vent pipe in the center of urgent relay valve, when the gas supplying pipe is broken suddenly, the vehicle breaks gas to brake urgently, which improves safety of entire vehicle.

A valve unit for an electro-pneumatic brake control is connected to an input of an air-quantity-boosting valve for the aeration / venting thereof. A double-armature solenoid valve includes primary and secondary armatures each spring-loaded and actuated by common magnet coil. The primary armature is a switch for a vent valve; the secondary armature is a switch for an intake valve. When the coil is not drawing current, the armatures are in spring-loaded position, the intake valve blocking intake and the vent valve venting. When a first current flows through the coil, the primary armature enters switching position, with the secondary armature in spring-loaded position; the intake valve blocking intake and the vent valve blocking venting. When a second current greater than the first flows through the coil, both primary and secondary armatures are moved into switching positions, so that the intake valve admits air and the vent valve blocks venting.

A joining assembly for fixing a flexible tube at a plate shaped holder. The joining assembly comprises first and second sleeve members made of plastic material and adapted to be joined by snap-lock means so as to form a closed sleeve clampingly receiving the flexible tube, and a bracket made of plastic material and adapted to engage the closed sleeve so as to fix it in a hole of the holder.

A highway vehicle towing system includes a light railroad track embedded in a highway and capable of transmitting electricity from a power supply plant, and a towing tractor movable along the light railroad track to tow a car. The owing tractor has multiple pairs of metal wheels movably supported on the light railroad track, a motor, electrical wires connecting the metal wheels to the motor for transmitting electricity from the light railroad track to the motor, a transmission shaft coupled to and rotatable by the motor, and a differential mechanism coupled between the transmission shaft and the metal wheels for enabling the metal wheels to be rotated along the light railroad track by the motor.

A vehicular brake system component is used in a brake system of a vehicle. The brake system component includes a sealable bonded component having a metal member and an elastic rubber member bonded to each other and located so as to touch a brake fluid.

The invention provides a fluid coupling for coupling a fluid source with a fluid supply line. The fluid coupling comprises a gladhand mounted to a body via a swivel connection. The gladhand is movable between a stored and protected position, wherein an outlet of the gladhand rests against a rubber cup to prevent fluid flow therefrom, and a use position, wherein the gladhand is removed from the rubber cup and can be connected to a fluid supply line. Additionally, the fluid coupling comprises a valve assembly preferably disposed in the body. The valve is operable between open and closed positions to effectively turn the fluid coupling on and off.

The invention relates to an X-type pipeline layout energy feedback type hydraulic antilock brake system (ABS) for an electric vehicle, which is characterized in that one oil outlet of a brake main cylinder is connected with a right front wheel and left rear wheel brake oil pipeline of a pressure regulator, the other oil outlet of the brake main cylinder is connected with a left front wheel and right rear wheel brake oil pipeline of the pressure regulator, a main cylinder pressure sensor is arranged on a pipeline connected with the brake main cylinder and the right front wheel and left rear wheel brake oil pipeline, two front wheel cylinders are respectively provided with a wheel cylinder pressure sensor; a high-speed switching valve is respectively additionally arranged between the right front wheel and left rear wheel brake oil pipeline and the brake main cylinder and between the left front wheel and right rear wheel brake oil pipeline and the brake main cylinder; and two high-speed switching valves and a medium-pressure energy accumulator are additionally arranged in a right front wheel brake pipeline and a left front wheel brake pipeline. The invention can realize integrated control of brake energy feedback and the ABS, improves the vehicle fuel economy, and improves the energy recovery efficiency in the brake process and can not affect the driving habit of a driver, thereby being capable of being widely applied to the vehicle.

PCT No. PCT / DE96 / 00917 Sec. 371 Date Feb. 23, 1998 Sec. 102(e) Date Feb. 23, 1998 PCT Filed May 25, 1996 PCT Pub. No. WO97 / 02971 PCT Pub. Date Jan. 30, 1997The vibration damper has a sleevelike shaped part comprising an elastomer as a diaphragm. The shaped part is received tightly on the opening end of a bore of a housing and surrounds an extension of a support body disposed in the bore. Provided on a side face of the extension is a groove, which communicates with a chamber in the extension. The shaped part, which on its outside is exposed to the brake fluid, with the inside of its jacket wall defines a hollow chamber, formed toward the extension of the support body and having atmospheric pressure. The vibration damper can be used in a slip-controlled hydraulic brake systems of motor vehicles.

The present invention is directed to a braking stroke simulator for use in a brake system, which comprises a simulator piston moved in response to operation of a manually operated braking member, and an elastic element for providing a stroke to the simulator piston in response to braking operation force applied to the manually operated braking member, wherein restoring amount of the elastic element is restricted to set an initial load to be applied thereto. The elastic element includes a first elastic member made of rubber, and a second elastic member made of a helical spring, which is disposed in series with the first elastic member. The initial load applied to the first elastic member and the initial load applied to the second elastic member are set to be substantially equal to each other.

An electronic vent valve for an electronically controlled pneumatic (ECP") braking system having a plurality of braking sites at which a braking force can be applied. The ECP braking system includes a master controller processing circuit, individual braking control units located proximate each of the braking sites and a brake pipe supplying compressed air to the braking sites. The electronic vent valve is in fluid communication with the compressed air carried by the brake pipe and has an open position for substantially venting the compressed air from the brake pipe and a closed position for substantially retaining the compressed air within the brake pipe. The electronic vent valve includes a control circuit for causing the valve to open during emergency braking operations, thereby assuring a rapid decrease in the brake pipe pressure. The control circuit preferably includes a brake pipe pressure sensor and a microprocessor for calculating a rate of change of the brake pipe pressure (dP / dt) and for causing the valve to open whenever the calculated rate of change of brake pipe pressure exceeds a threshold value. The control circuit can additionally cause the valve to open in response to a direct command from the master controller and can transmit to the master controller various operational characteristics of the braking system and the microprocessor itself.

A damping element for attenuating hydraulic pressure pulses is integrated into a hydraulic chamber of a motor vehicle hydraulic system. The damping element includes a end cap support body and a membrane that fits over a portion of the support body. The membrane has a first side facing towards a source of hydraulic fluid and a second side facing away from the hydraulic fluid source. At least one space is provided between the second side of the membrane and the end cap support body to allow for deformation of the membrane under hydraulic pressure. The membrane has a collar with a lip seal provided for fitting into place on the wall of the hydraulic chamber. At least one second space for receiving hydraulic fluid is defined between the lip seal and a region of the membrane opposite the lip seal.

A hydraulic brake system includes a bicycle steering assembly having a head tube, a connecting member connected with the head tube and a handlebar mounted on the connecting member. The connecting member has a receiving portion disposed therein. A hydraulic device is mounted in the receiving portion. The hydraulic device includes a hydraulic braking mechanism and at least one connecting tube connected with the hydraulic braking mechanism. A braking device is adapted to mount on a wheel of the bicycle. The at least one connecting tube is connected with the braking device. Two brake levers are respectively mounted on two ends of the handlebar. Each brake lever has a brake cable connected therewith. The brake cable has one end connected to a corresponding brake lever and the other end connected to the hydraulic brake mechanism for relatively driving the brake device.

The present invention is directed to a braking stroke simulator for use in a brake system, which comprises a simulator piston moved in response to operation of a manually operated braking member, and an elastic element for providing a stroke to the simulator piston in response to braking operation force applied to the manually operated braking member, wherein restoring amount of the elastic element is restricted to set an initial load to be applied thereto. The elastic element includes a first elastic member made of rubber, and a second elastic member made of a helical spring, which is disposed in series with the first elastic member. The initial load applied to the first elastic member and the initial load applied to the second elastic member are set to be substantially equal to each other.

A hybrid system for a vehicle which can ensure a braking stability on a slippery road is provided. Therefore, the system is provided with a motor 2 a rotation force of which is transmitted to a rear wheel 7, braking actuators 57, 67 which brake the front wheel 6 and the rear wheel 7, and proportional valves 53, 63 controlling a braking force introduced into each braking actuator 57, 67. A control unit 20 is so provided that the control unit 20 calculates a required braking energy based upon a vehicle operating condition in demanding a braking and operates the motor 2 as a power generator to generate a power so as to produce the calculated braking energy, as well as controls a braking force of the front wheel 6.

A solenoid valve for a brake system, which has a simplified configuration and can be easily manufactured with reduced manufacturing costs. The solenoid valve includes valve seat member integrally formed with a seat portion having a first orifice, an opening / closing member slidably installed in the valve seat member, the opening / closing member having an inner passage formed through the opening / closing member, an outer passage formed at an outer surface of the opening / closing member, a second orifice formed at one end of the opening / closing member, the second orifice having a smaller diameter than that of the first orifice, and a first opening / closing portion formed at the other end of the opening / closing member to open or close the first orifice, an opening spring to move the opening / closing member, for opening of the first orifice, a sleeve having a first end coupled to an outer surface of the valve seat member and a flange formed at the first end so as to be fixed to a modulator block, a valve core coupled to a second end of the sleeve, opposite to the first end of the sleeve, an armature slidably mounted in the sleeve, the armature having a second opening / closing portion to open or close the second orifice, and a restoring spring to press the armature toward the second orifice.

A hydraulic braking system including first and second braking circuits. The first and second braking circuits each include a wheel brake, a pressurized fluid source, and a hydraulic conduit connecting the wheel brake to the fluid source. Each of the hydraulic conduits includes a control valve that operates to selectively prevent fluid flow from the pressurized fluid source to the wheel brake. A connecting conduit connects the first and second braking circuits. A floating piston is disposed within the connecting conduit and is adapted to be displaced by the pressurized fluid provided by the pressurized fluid source in the first braking circuit when the control valve of the first braking circuit is closed. The displacement of the piston generates an additional volume of pressurized fluid in the hydraulic conduit of the second braking circuit that effectively augments the pressurized fluid provided by the second pressurized fluid source.