297 results about "Small engine" patented technology

The throttle of an engine in an engine driven generator system operating under an intermittently heavy load, as in supplying current to a welder, is controlled such that successive control signals sent to a throttle actuator for adjusting the engine throttle position are inhibited until at least a predetermined time has elapsed since the last preceding adjustment to the throttle. This procedure ensures that, as to each incremental adjustment to the throttle, the engine has sufficient time to respond, thereby preventing over-speeding or stalling the engine. The throttle actuator may be a stepper motor which is stepped by throttle position change signals from a processor which monitors engine speed and generator load to determine whether the throttle should be adjusted and, if so, in which direct. Alternatively, the throttle actuator may be a solenoid pulling against a spring in accordance with the average current through the solenoid coil. In this embodiment, the processor causes pulse width modulated signals to be applied across the solenoid coil with throttle position changes being reflected in changes to the width of the pulses, such changes in the pulse width being delayed for at least the predetermined time since the last preceding adjustment to the throttle.

An unmanned aerial vehicle comprising at least one rotor motor. The rotor motor is powered by a micro hybrid generation system. The micro hybrid generator system comprises a rechargeable battery configured to provide power to the at least one rotor motor, a small engine configured to generate mechanical power, a generator motor coupled to the small engine and configured to generate AC power using the mechanical power generated by the small engine, a bridge rectifier configured to convert the AC power generated by the generator motor to DC power and provide the DC power to either or both the rechargeable battery and the at least one rotor motor, and an electronic control unit configured to control a throttle of the small engine based, at least in part, on a power demand of at least one load, the at least one load including the at least one rotor motor.

The invention relates to a range-extending electric vehicle control system and method, belonging to the technical field of vehicle control of electric vehicles. The range-extending electric vehicle control system comprises a vehicle-mounted power battery, a driving motor, a range extender, a transmission box, a vehicle control unit (VCU), a battery management system (BMS) and a motor control unit (MCU), wherein the range extender consists of a small-sized engine, a power-generating/driving integrated generator, an engine control unit and a power generator control unit; the range extender is used for supplying power to the vehicle-mounted power battery or directly driving the motor; the vehicle control unit is used for carrying out vehicle traveling drive control according to the driver demands and states of all subsystems of the vehicle, managing the vehicle energy and transmitting instruments of various working states to sub nodes of the range extender. According to the range-extending electric vehicle control system and method disclosed by the invention, on the promise of battery system safety and service life and with avoidance of frequent start and stop of the range extender as a target, control over power generation through braking energy recovery and control over power generation of the range extender are coordinated; and when the electric vehicle travels for a long trip, the range extender can be controlled to start or stop, and thus the requirement of extending the driving range of the vehicle is met.

An internal-combustion engine receives no air from outside atmosphere. Instead, combustion gas expelled from the engine is cooled and recycled back into the engine. That gas contains no nitrogen and consists mostly of carbon dioxide and water vapor. Oxygen and fuel are added to the recycled gas, and the resulting mixture is used to perform an internal-combustion cycle. Cooling that gas condenses its water vapor, and liquid water is separated from the gas. That water is used for injection into the recycled gas at a later time. A small amount of the expelled combustion gas is discharged into outside environment, and the rest is recycled. Water too is recycled back into the engine, and whatever is lost to outside environment is replaced by reclaiming water produced in combustion. No additional supply of water is needed. Since no nitrogen is present, no nitrogen oxides are produced. The amount of other harmful exhaust emissions is greatly reduced too, since most of them are recycled back into the engine. Water evaporation in the cylinders greatly improves fuel economy. The engine is inherently supercharged with combustion-gas pressure, and no turbocharger is needed. Since the combustion gas is heavier than air, the engine can be substantially smaller than a conventional engine of equal power. A smaller engine has less friction.

A valve for flowing gaseous fuel, i.e., natural gas or propane gas, to an internal combustion engine includes a valve body having an inlet passage and first and second outlet paths in parallel with one another and in flow communication with the inlet passage. A plug-type adjustment member is threaded into the body and an annular seat in the body coacts with the adjustment member to form an orifice in the first outlet path. A stop mechanism limits movement of the adjustment member between a first position at which the orifice area is smaller and a second position at which the orifice area is larger. The valve permits adjustment of fuel flow to small engines so that such engines provide maximum power without exceeding applicable emission standards. And the valve is tamper-resistant.

Electric arc spraying a metal onto a substrate produces an anchor layer on the substrate that serves as a surprisingly superior intermediate layer for a catalytic material deposited thereon. Spalling of catalytic material is resisted even when subjected to the harsh conditions imposed by small engines or in a close-coupled position for a larger engine.

A low pressure, low cost electronic fuel injection system (18) for small hand-held two cycle engines (1) is provided which employs a number of improvements, including by way of example and not of limitation, an improved low cost injector construction (45), a throttle body integration (10) that includes mounting the operational components of the supply system on a single unit, an improved ignition module (40), a pressure regulated fuel system controlled by an electronic control unit (42) employing and an adaptive algorithm based on engine speed which controls the speed by varying the amount of fuel provided to the engine.

An exhalant type combustion chamber of small engine, which contains flame tube inner and outer wall of combustion chamber, 3-12 T-shape exhalants and fuel injection nozzle, wherein the 3-12 T-shape exhalants uniformly arranged around front wall of flame tube of combustion chamber, 3-12 fuel injection nozzles plugging in 3-12 exhalants, many holes drilled on inner, outer and front end wall of flame tube of combustion chamber, air interring combustion chamber to form a stable large vortex at head part of flame tube utilizing tangential air inlet. Said invention makes more uniform air mixing and more stable combustion.

The invention relates to an orbital-transfer small-sized solid rocket engine, which adopts an arrangement that: four centrosymmetric small-sized engines which are same in size are arranged in a given space; each two centrosymmetric engines form a group to realize the orbital manoeuvre of a satellite; and each small-sized engine comprises igniters, a shell, a propellant and a spray pipe, wherein the igniters adopt three parallelly-connected igniters for ignition, the material of the shell is titanium alloy which is high in strength, temperature-resistance, corrosion-resistance, good in pressure application and processing performance, and high in impact ductility, the propellant is an HTPB propellant which is high in specific thrust, medium in combustion velocity and excellent in energy response, mechanical characteristics and combustion characteristics, and the spray pipe adopts the same material as the shell of a combustion chamber, a grain which is an internal combustion grain adopting a casting installation mode, and a structure of single thrust and single spray pipe. The solid rocket engine can meet the requirements of the orbital transfer engines on large thrust during the start-up, requires short operating time, and is excellent in reliability and high in accuracy.

Electric arc spraying a metal onto a substrate produces an anchor layer on the substrate that serves as a surprisingly superior intermediate layer for a catalytic material deposited thereon. Spalling of catalytic material is resisted even when subjected to the harsh conditions imposed by small engines or in a close-coupled position for a larger engine.

A muffler for a small engine includes a first expansion chamber 12 for exhaust gas having an exhaust gas inlet 11 being connected to an exhaust gas outlet of the engine, a second expansion chamber 15 being partitioned from the first expansion chamber 12 by a partition plate 14 and being communicated with the first expansion chamber 12 through a first communicating hole 13 on the partition plate 14, and a third expansion chamber 18 being partitioned from the second expansion chamber 15 by the partition plate 14 and being communicated with the second expansion chamber 15 through a second communicating hole 16 on the partition plate 14 and having an exhaust gas outlet 17. A first heat resistant mesh catalyst 19 is disposed on the exhaust gas inlet 11. A first exhaust gas purifier 20 composed of a heat resistant knit fabric 20a coated with a catalyst for purifying the exhaust gas is disposed on the communicating hole 13 on the partition plate 14.

Accordingly, the muffler for a small engine having a large muffling effect and a large purification effect on the exhaust gas can be provided. A manufacturing process of the exhaust gas purifier is simple and thereby a manufacturing cost of the muffler for a small engine is reduced.

A choke and throttle control arrangement for a small engine includes a base plate to which a pair of levers are pivotally joined. One includes a governor spring arm connected to the engine's speed governor, and the other is provided with an arm which serves as a choke actuator. A spring interconnects the two levers to permit them to rotate in unison at low engine speed in response to operator actuation of a throttle control handle. An adjustable stop member is positioned to interrupt the rotation of the governor spring arm when a selected less-than-maximum engine speed is reached. Further throttle control handle advancement permits the choke actuating arm to move to the closed choke position. As the throttle control handle is moved towards a low speed setting, the lever containing the choke actuating arm returns to the position at which the selected less-than-maximum speed was reached. Once reaching that position, both levers move together under the influence of the interconnecting spring as the engine speed is reduced.

The invention discloses a working substance flowing system of a piston reciprocating internal combustion engine and regulation and control setting thereof. An upper end of a frame moving up and down along the rotation of a power shaft is connected with an engine cylinder piston [7]; the lower end of the frame is made into a pressure cylinder piston [5]; an air inlet pipe[14], an air inlet check valve[2] and an air compression check valve[3] are arranged on a bottom cover plate of the pressure cylinder; air sucked from the air inlet pipe[14] by the pressure cylinder is sprayed by water mist for intercooling in compression; compressed air is stored in an air storage channel, tangentially supplied to an air inlet[10] of an engine cylinder sleeve; a rod head of the air compression check valve[3] is connected with the compressed air regulating and controlling device. An exhaust port [12] of the engine cylinder is arranged in the rear side of the cylinder top; a pressurized air bypass channel tightly pressed on the lower side of a flashboard-type exhaust valve [21] and an air suction check valve [22] of the upper side of a vent-pipe inlet cool an exhaust system and exhaust air and have the effects of both decontamination and preventing an exhaust gas turbine from surging. The supercharging mechanism has compact structure, indirect transmission, stable pressurization and cooling function; the working substance flowing system is provided with the regulating and controlling device with optimized performance and is convenient to the actualization of a small and medium sized engine.

The invention provides a resistance reduction-propulsion integrated structure of a manually-ventilated supercavitating torpedo. A traditional torpedo structure is changed, a cavitation bubble generator on the head portion of the traditional structure is omitted, and the head portion of the torpedo is made to be a plane; an engine jet pipe located on the tail portion of the torpedo is omitted, and four small engine jet pipes are arranged at the front end of the torpedo and evenly distributed in the upper direction, the lower direction, the left direction and the right direction; the included angle between the central axis of each jet pipe and the central axis of the torpedo is 10-15 degrees; by the adoption of the structure, the situation that the movement form is instable due to the fact that the front portion and the rear portion of the torpedo bear thrust at the same time is avoided, and meanwhile uniform thrust can be provided. The resistance reduction-propulsion integrated structure of the manually-ventilated supercavitating torpedo can be applied to low-speed movement and can also achieve high-speed movement; during low-speed movement, natural cavitation bubbles cannot be formed on the plane of the front portion of the torpedo, the engine jet pipes inject air so that a ventilation cavitation bubble can be formed nearby, the resistance of the portion covered with the cavitation bubble is reduced, the resistance reduction effect is achieved, and a propulsion system and a resistance reduction system of the torpedo are combined.

An internal-combustion engine receives no air from outside atmosphere. Instead, combustion gas expelled from the engine is cooled and recycled back into the engine. That gas contains no nitrogen and consists mostly of carbon dioxide and water vapor. Oxygen and fuel are added to the recycled gas, and the resulting mixture is used to perform an internal-combustion cycle. A small amount of the expelled combustion gas is discharged into outside environment, and the rest is recycled. Since no nitrogen is present, no nitrogen oxides are produced. The amount of other harmful exhaust emissions, including particulate matter, is greatly reduced too, since most of them are recycled back into the engine. The engine is inherently supercharged with combustion-gas pressure and, since the combustion gas is heavier than air, the engine can be substantially smaller than a conventional engine of equal power. Direct injection of oxygen leads to further reduction in engine size. A smaller engine has much better fuel economy. Complete elimination of nitrogen oxide emissions and a significant reduction in particulate matter can substantially increase appeal of diesel engines based on the above concept.

The invention discloses a torque measuring device of a small engine and belongs to the technical field of engine performance testing. The device comprises a propeller, an engine to be measured, connecting screw rods, a double-arm steel plate, support bearings, a support polish rod, a pressure sensor, a general support plate, a rack with a slide rail, a pressure plate, a steering engine and a tension meter, wherein the propeller, the engine to be measured, the connecting screw rods, the double-arm steel plate and the support polish rod form a cantilever system, the support bearings, the general support plate and the rack with the slide rail form a support system, and the cantilever system can rotate freely around the support polish rod. The device can relatively accurately measure a torque characteristic of a small power model airplane engine (power between 0.5kW and 15kW), which cannot be measured accurately by the common torquemeter, and can measure engine thrust at the same time.

PLANT FOR WASHING MACHINERY, which is characterized by being a compact plant which includes a small engine room of approximately 9m3, inside which the different elements such as the following are housed: pressure pumps, electric motors, a diesel boiler, a hot water accumulator, a plant for osmotizing water, an electronic robot mechanism, an electric switchboard, fuel tanks, osmotized water tank, measurement pumps and auxiliary material. The washing liquids come out under pressure through hoses and reach a manual shuttle.

Uses the steam compression type electricity heat pump the household type cold hot spot three associations for the system, belongs to the energy and the refrigeration air conditioning area of technology. Including the engine/generator, the steam compression type electricity heat pump, the haze - water heat interchanger, keeps warm the water tank, the life hot water converter and the controller. The system first through the small engine electricity generation, provides the user the basic power load. Corresponding outside climatic conditions, system by three kind of different patterns movements. Summer refrigerates the pattern movement, the electricity generation provides the electricity heat pump to carry on the refrigeration, the haze afterheat uses for to provide the life hot water load; The winter heats the pattern movement, the electricity generation provides to the heat pump carries on the heating, the heat pump and haze heat interchanger series connected way heating; Spring the autumn by the thermoelectricity Communist Party of the Soviet Union pattern movement, the heat pump does not work, provides the life hot water load using the haze afterheat. The invention has coldly, hot, electricity load supply nimble, many kinds of patterns movement, energy use factor high, changes the load ability strongly, technology mature, movement reliable, cost low, the volume is small, is suitable for the family and the small commercial place.

The invention discloses a solid rocket motor powder column fixing device, which is used for fixing the radial stability of the combustion powder column on the entire surface of the engine. The engine grain fixing device includes a positioning sleeve, an elastic retaining ring and a gasket. The positioning sleeve has a thin circular structure and is designed with replaceable parts. The positioning sleeves of different sizes are matched according to the diameter of the rocket engine charge. A plurality of elastic retaining rings are evenly distributed along the circumferential direction of the positioning sleeve to ensure the stability of the charging axis. Arc-shaped gaskets are installed at the end of the circlip inside the positioning sleeve, and multiple groups of circlip gaskets have equal radial distances according to the center of the positioning sleeve, which can reduce the destructiveness of the charge due to stress concentration. The positioning sleeve, the retaining ring and the gasket are all processed by the same type of high-temperature-resistant metal material; during the combustion process, the parallel state of the axis of the free-filling full-surface combustion charge is guaranteed, and the pressure and thrust of the small engine on the ground are tested more accurately test.

An engine mounting stand for small engines, and particularly adapted for motorcycle engines. The engine mounting stand includes an upright and a journal bearing, the upright is attached to a base, a rotating bracket assembly is attached to the journal bearing of the upright, the bracket assembly designed to attach to the engine mount holes of the engine, and is operative for rotatably positioning the engine so that the mechanic can access all areas of the engine. The engine mounting stand can further include an outrigger support attached to the rotating bracket assembly, and an outrigger secured to the outrigger support. The outrigger attaches to the engine and outrigger end aperture can provide further attachment support to the bracket assembly.