710 results about "Cylinder Valve" patented technology

An engine with cylinder deactivation (Displacement on Demand or DOD™) includes standard (STD) cylinders which are not deactivated and DOD cylinders which can be deactivated by closing their intake and exhaust valves and shutting off their fuel supply. To provide smooth transitions, the STD and DOD cylinders form separate groups each supplied with charge air through one or more separate throttles. When switching to DOD operation, the throttles are oppositely actuated to cut out the DOD cylinders and maintain torque in the active cylinders prior to deactivation of the cylinder valves. When returning to STD operation, the valves are reactivated before oppositely actuating the throttles to enable full cylinder operation. In DOD operation, a small supercharger may be operated to boost torque of the operating STD cylinders and thus increase the DOD operating range.

Methods and systems are provided for monitoring cylinder valve deactivation in an engine operating with a plurality of cylinder valves. One example method comprises, sensing a plurality of cylinder valve positions of a plurality of cylinder valves; and combining the plurality of sensed positions to form a combined cylinder valve signal. The method may further include identifying valve degradation and differentiating valve degradation among the plurality of cylinder valves based on the combined cylinder valve signal and an expected value of the signal, and further based on a crank angle at which the expected value differs from the combined signal.

A method for calculating transient fuel wall wetting characteristics of an operating engine is described. The method accounts for cylinder valve deactivation of cylinders in the engine in calculating the dynamic fueling compensation. In one example, fuel vaporization effects from fuel puddles in deactivated cylinders is considered when calculating the fueling compensation for active cylinders.

The invention discloses an automatic assembling line of a liquefied petroleum gas cylinder valve and relates to an improvement on production equipment of a liquefied petroleum gas cylinder valve. The automatic assembling line is characterized by consisting of a loading working platform, a valve core assembling working platform, a connecting piece assembling working platform, a valve rod assembling working platform, a rubber pad assembling working platform, an oil coating working platform, a nut assembling working platform, a nut screwing working platform, a paper pad assembling working platform, a hand wheel assembling working platform, a spring assembling working platform, a round nut assembling working platform, a finished product blanking working platform and a line body. The automatic assembling line has the beneficial effects that a workpiece is clamped and conveyed by adopting a mode of automatic loading of a vibrating disc and stepping transmission so as to be transferred in a reciprocating manner of returning to the original position; and after the assembly of all the working platforms is finished in circulation, the blanking of the workpiece in next circulation is carried out, and the movement of the mechanism is more accurate by utilizing a cylinder and a linear guide rail. A sensor is adopted to sense whether the workpiece exists, a signal is transmitted to a PLC (programmable logic computer) and the PLC sends an instruction to execute the actions of all the working platforms and carry out closed-loop control.

A method of controlling a hybrid propulsion system of a vehicle, where the hybrid propulsion system includes an internal combustion engine and an alternate torque source configured to provide motive power to the vehicle. While the engine is turned off, initial cranking of the engine is performed to initiate an engine start. During initial cranking, a cylinder valve is operated in a startup timing mode so as to reduce pumping work required to move a piston during initial cranking. Subsequent to initial cranking, the valve is operated with a different timing than that employed during the startup timing mode.

Methods and systems are provided for monitoring cylinder valve deactivation of a cylinder valve of an engine. One example method comprises, indicating degradation of cylinder valve deactivation in response to manifold pressure at or around a characteristic frequency.

A method for operating an engine, comprising port injecting a first quantity of a first gaseous fuel in a cylinder cycle and direct injecting a second quantity of a secondary injectant in the cylinder cycle as a function of a desired air-to-fuel ratio (AFR), the desired AFR based on a temperature of an engine cylinder valve. The desired AFR may be outside the AFR range available during natural gas combustion alone and thus allows for cooler engine operation.

Periodic torque disturbances that affect cylinder valve operation are anticipated, and an appropriate reaction torque is provided by an electric motor to counteract the periodic torque disturbances to position a cylinder valve at a desired position.

Systems and methods are provided for operating an internal combustion engine including a variable cam timing (VCT) mechanism in cooperation with a plurality of deactivatable cylinders, each cylinder with a plurality of cylinder valves. One example method comprises, operating at a first cylinder valve timing before a transition of reactivating deactivated cylinders, and, before the transition, advancing cylinder valve timing from the first valve timing, where after the transition the cylinder valve timing remains at a second valve timing, the second valve timing advanced relative to the first valve timing.

A method of controlling cylinder valve switching between a first valve condition and a second valve condition for transitioning between combustion modes of an engine comprises adjusting timing of a signal to switch between said valve conditions in response to information from a combustion sensor, wherein said combustion modes include spark ignition and homogeneous compression ignition.

A valve apparatus especially well-suited for use in gaseous oxygen delivery systems. A valve apparatus is provided that substantially reduces the risk of fire in high-pressure oxygen systems. The apparatus is particularly well-suited for use as a plug valve on ordinary cylinder containers, but may be beneficially used in any pressurized gas system, particularly oxygen systems such as those encountered in many industrial facilities. The wetted portion of the valve is isolated from threaded portions to prevent particulate contamination of the gas stream. The valve seat is located to protect it from direct impact of high-velocity gas streams. The inventive valve, and its associated inventive check-filter and excess-flow prevention features, reduces the potential for hazardous combustion at valve points within oxygen delivery systems.

The invention relates to a combination valve for a high-pressure hydrogen storage cylinder, which comprises a charging check valve, a manual stop valve, an electromagnetic valve, a pressure reducing adjusting valve and a safe pressure releasing device; wherein a gas flue of a charging inlet of the hydrogen storage cylinder is provided with the check valve and the manual stop valve, a gas supply flue is educed between the two valves and supplies gas outwards through the electromagnetic valve and the pressure reducing adjusting valve; a pressure releasing gas flue is educed between the manual stop valve and the gas flue connected into the combination and releases pressure outwards through the safe pressure releasing device. As a cylinder valve is provided with the pressure reducing adjusting, considering the integration of the cylinder valve and the mensurability and output controllability of the gas, the invention can implement the low-pressure output; therefore, a gas supply output system has the very high safe reliability and simultaneously can be used as a main valve of a hydrogen storage cylinder group; other gas cylinders of the hydrogen storage cylinder group can supply gas outwards after pressure reduction through the main valve.

A method for recirculating exhaust gas includes operating an intake valve to open an intake port of a combustion chamber, operating an exhaust valve to open an exhaust port of the combustion chamber, and directing exhaust gas from the exhaust port to an exhaust recirculation port of the combustion chamber. The method also includes operating an exhaust recirculation valve to open the exhaust recirculation port to allow the exhaust gas to enter the combustion chamber and determining at least one valve actuation condition for controlling actuation of each of the intake valve and the exhaust recirculation valve.

A combined air-supplying/air-purifying breathing system that includes a self-contained breathing apparatus, a facepiece for delivering breathable air from the self-contained breathing apparatus to a user, and a powered air-purifying respirator having at least one filter and a blower and having an output connected by a hose assembly to the facepiece. A control interface operationally connects the self-contained breathing apparatus to the powered air-purifying respirator. The self-contained breathing apparatus includes a pressure vessel, a cylinder valve assembly and a pressure reducer, all carried by a back frame, and the powered air-purifying respirator is adapted to be mounted on, and carried by, the back frame, by coupling the back frame and the respirator together at respective attachment points.

The invention discloses a hydrogen storage tank with an external heat exchanging structure, and belongs to the hydrogen storage technical field of the hydrogen energy field. The hydrogen storage tank comprises the following structure: a skirt support is disposed at the bottom of a tank body; a hydrogen storage material bed is disposed in the tank body; a gas guide tube is disposed at the center position in the tank body and pass straight through the tank mouth from the tank bottom; a filter is installed in the tank mouth, and a hydrogen cylinder valve is installed at the external of the tank mouth; a housing is disposed at the external of the tank body, two ends of the housing are respectively provided with a heat conduction liquid inlet and a heat conduction liquid outlet; and a heat exchanging structure is arranged in an annular chamber between the housing and the tank body. The heat exchanging structure is in the shape of a straight flow, a winding flow, a single spiral or multiple spirals, and the hydrogen storage material bed is a uniform mixed body of a hydrogen storage material and heat conduction fiber. The provided hydrogen storage tank is simple in structure, easy for preparation and processing, and low in cost. Compared with conventional hydrogen storage tanks, the hydrogen storage tank provided by the invention has relatively excellent heat exchanging effect and relatively excellent hydrogen desorption performance.

The invention relates to an automatic detection line of a liquefied petroleum gas cylinder valve, which belongs to the technical field of detection instruments. The invention is characterized in that the automatic detection line consists of eleven work stations: an upper element work station, a high-pressure closed sealing detection work station, an opening work station, a low-pressure opening sealing detection work station, a high-pressure opening sealing detection work station, an internal thread through gauge detection work station, an internal thread stop gauge detection work station, an external thread detection work station, a flow rate detection work station, a tight screwing work station and an opening reduction work station. The invention has the advantages that the detection line compares the leakage detected by a gas sensor with the leakage detected by a differential pressure sensor, the leakage detection by the gas sensor greatly shortens the detection time and improves the defection efficiency, the efficiency improvement of the leakage detection by the gas sensor is very obvious, particularly for 100 percent detected products, and in addition, the precision is high.

A positive displacement piston unit is provided that utilizes a magnetorheological (MR) or electrorheological (ER) fluid as the transmission fluid. Each cylinder of the invention has an intake port connected to the suction port of the hydrostatic pump and an output port connected to the pressure port. Flow of the transmission fluid through the cylinder is controlled by an electromagnet or electrode located in close proximity to the intake and output ports of the cylinder. By energizing the electromagnet or electrode, the viscosity of the transmission fluid can be increased such that the portion of the fluid immediately near the electromagnet or electrode substantially solidifies. The solidified portion of the transmission fluid disables fluid through the particular passage, thereby restricting flow of the transmission fluid to the cylinder. As such, the present invention does not require the use of mechanical cylinder valves to control the flow of the transmission fluid.

A valve insert for a cylinder valve for connecting an LPG tank to a gas consuming appliance has a body member mounted in the outlet end of the cylinder valve and a valve element slidable in the body member and cooperable therewith to control the flow of gas from the tank to the appliance. A quad sealing ring between the valve body and valve element seals against gas leakage therebetween and provides a lubricant reservoir for lubricating the surfaces thereof, and a wiper ring downstream of the quad sealing ring cleans the surfaces and precludes the ingress of foreign matter to the area of the gas sealing quad ring.

A method for operating an engine having at least a first and second cylinder [group], the first cylinder having a first electrically actuated valve and the second cylinder having a second electrically actuated valve, comprising of operating the first cylinder with a spark timing more retarded than a spark timing of a second cylinder, where during said operation, said first cylinder operates with a first operation of said first electrically actuated valve and said second cylinder operates with a second operation of said second electrically actuated valve, where said first operation is different from said second operation.

A dual cylinder manifold comprising a flexible, high pressure hose member connected between a first and a second interconnector that funnels pressurized air from two cylinders containing pressurized air to a single regulator. In operation, the first interconnector is attached to a first cylinder valve, the second interconnector to the second cylinder valve, and a regulator attached to the second interconnector. The hose member may be removably connected to the interconnectors so that it can be replaced with another hose member if desired. The manifold may also include valve connectors attached to the interconnectors for connecting to the cylinder valves, a valve adaptor for adapting the second interconnector to receive a regulator of differing connecting design where necessary, a valve connector for making the intended regulator compatible with the second interconnector, or combinations thereof. The manifold may also be provided as a kit having removable or interchangeable components for constructing a several possible manifolds, each connectable to differing dual tank systems.