Actuating unit for axial deflection of gas-exchanging valve in combustion engine

FIELD: engines and pumps.

SUBSTANCE: actuating unit comprises a disk and a rod that form a piston. A rod is attached to the disk and axially exposes from it. A disk divides a cylinder volume into the first and the second parts and is capable of anaxial movement between active and inactive positions, and a rod is capable of an axial movementin concordance with the disk movement. The unit also comprises a pressurized fluid circuit that is designed with a possibility of controlled fluid communication and with the cylinder volume first part. The unit has the first hydraulic circuit (21) that comprises a fluid-filled space (22). A piston of an actuating unit comprises the second hydraulic circuit (24). A space (22) is in communication with a central hole through the fluid (25) in the second circuit (24) when the piston disk is in the inactive position. A hole (25) is semi-bounded by a positioning piston (29) that is capable of an out-in traverse axially towards the piston and of a pressing on a gas-exchanging valve in the cylinder volume second part. A second circuit (24) comprises a valve (27) that is configured to prevent the fluid flow from the hole (25). A rod has an exposed end (30) that is partially thrust against a stop surface (31) in the space (22) when the disk is in the inactive position. A piston area (29), that faces the central hole (25), is less than or equal to the pressurized exposed end (30) area of the actuating unit piston rod.

EFFECT: actuating unit piston rod is always in the inactive defined position when the engine valve is closed or the actuating unit is inactive.

5 cl, 5 dwg

 



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: invention can be used in the internal combustion engines. Method of shock-absorbing of impact loads is designed for the gas distributing valve of the internal combustion engine and is performed by the hydraulic drive system of the gas distributing valve of the internal combustion engine comprising control system of gas distributing valve drive, gas distributing valve (7), slide valve (11) to control liquid flow, hydraulic accumulator (6) charged with work liquid, and piston (14) of the gas distributing valve drive. During movement of the gas distributing valve (7) from closed position to opened position, and vice versa the control system of the gas distributing valve drive (7) tracks the current position and speed of the gas distributing valve (7), determines time of start of movement braking of the gas distributing valve (7), and by the slide valve (11) of liquid flow control ensures the work liquid supply from the hydraulic accumulator (6) in the piston (14) cavity of the gas distributing valve drive, ensuring movement of the gas distributing valve (7) in the specified direction. Further the system by means of the slide valve (11) changes direction of the work liquid supply from the hydraulic accumulator (6) in the piston (14) cavity of the gas distributing valve drive, ensuring movement of the gas distributing valve in opposite direction, as result speed of the gas distributing valve (7) is reduced to value ensuring shockless contact when the gas distributing valve (7) achieves the final point of movement. Then the control system returns the slide valve (11) for liquid flow control to the previous position, and the work liquid from the hydraulic accumulator (6) ensure final setting of the gas distributing valve (7) to the specified position.

EFFECT: reduction of the impact loads on valve.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: control system connects a shaft of non-reversing starter mechanism to a crank shaft of an internal combustion engine (ICE) and rotates it. If the direction of rotation of the starter mechanism shaft doesn't coincide with the pre-set direction of the crankshaft rotation, the control system at position of the piston near the top dead point at the moment, when above the piston the pressure of gases is increased to the value providing the fuel combustion conditions, disconnects shafts and sets a liquid flow control spool of the nozzle drive piston into the position at which liquid from the hydraulic accumulator flows into the top cavity of the nozzle plunger drive piston, and the nozzle injects fuel into the combustion chamber. Fuel is burnt, and combustion products change the direction of the piston movement and the crankshaft rotation to the opposite. At the position of the piston near the lower dead point the control system sets the liquid flow control spool into the position at which liquid from the hydraulic accumulator flows into the top cavity of the drive piston of the gas-distributing valve. The exhaust gas-distributing valve connected to it opens. After discharge of gases in atmosphere the kinetic energy of the flywheel and the crankshaft rotates it, and the control system ensures functioning of gas-distributing valves and the fuel nozzle according to the pre-set direction of rotation of the ICE crankshaft.

EFFECT: higher efficiency of engine control.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: control system interconnects a shaft of a reversing starter with a crank shaft of an internal combustion engine (ICE) and rotates it towards the pre-set direction of rotation of ICE crank-shaft. At the compression stroke with the closed gas-distributing valves at the moment when over the piston the pressure of the compressed air or the fuel mix is increased to the value providing fuel combustion conditions, the system disconnects the reversive starter shaft with the ICE crank-shaft. Then the nozzle injects fuel into the combustion chamber and ignites fuel by a spark plug. At the same time the system sets the sequence of opening and closing of gas-distributing valves and operation of the fuel nozzle according to the pre-set direction of rotation of the crankshaft.

EFFECT: higher efficiency of engine control.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: gases in the cylinder of the internal combustion engine (ICE) press on a pump piston end face, and liquid enters the hydraulic accumulator, after that the spring returns it in a starting position and through the check valve liquid from the compensation tank is forced out there. For opening of the ICE valve the control system sets a valve spool in the position at which liquid from the hydraulic accumulator goes to the top cavity of the drive piston of the gas-distributing valve and the gas-distributing valve opens. The exhausted liquid from the lower cavity is forced out into the compensation tank. For closing of the gas-distributing valve the control system follows the inverse sequence. For fuel supply the control system sets the nozzle spool into the position at which liquid of the accumulator goes into the top cavity of the drive piston of the nozzle plunger, and the nozzle plunger injects fuel into the combustion chamber. And at the return movement the nozzle plunger sucks fuel from the fuel tank.

EFFECT: improvement of efficiency of internal combustion engine due to regulation of its gas distribution valves and nozzles by the common hydraulic system.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: control system connects a shaft of non-reversing starter mechanism to a crank shaft of an internal combustion engine (ICE) and rotates ICE crankshaft. If the direction of rotation of the starter mechanism shaft doesn't coincide with the pre-set direction of ICE crankshaft rotation, the control system with the closed gas-distributing valves at the moment when over the piston the pressure of the compressed air or the fuel mix is increased to the value providing fuel combustion conditions, the system disconnects the non-reversive starter shaft with the ICE crank-shaft. Then the nozzle injects fuel into the combustion chamber and ignites fuel by a spark plug. Fuel burns, and under the action of combustion products the piston changes the movement direction and the rotation direction of ICE crankshaft to the opposite. At the same time the control system changes the sequence of opening and closing of gas-distributing valves and operation of the fuel nozzle according to the pre-set direction of rotation of the crankshaft.

EFFECT: improvement of effective control of internal combustion engine.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: control device for gas exchange in a piston engine has a cam device of a cam shaft of the engine, which interacts with an inlet valve mechanism for opening and closing of the inlet valve of the engine cylinder. The control device includes part (8) of the housing, in which piston device (9) having a possibility of being moved and connected to the cam device and the valve mechanism is arranged. Guide element (10) is arranged in part (8) of the housing between the cam device and piston device (9) with possibility of being moved in response to movements of the cam device. The control device includes control means of inlet valve opening time. Guide element (10) is equipped with auxiliary piston (13) arranged with a possibility of being moved between guide element (10) and piston device (9) and together with guide element (10) determining chamber (14). Part (8) of the housing is equipped with inlet channel (15) and outlet channel (17), which are located at the distance along movement direction of guide element (10) and arranged in their turn so that they are interconnected with the above chamber (14) through a circuit made in guide element (10) so that in order to choose the increased time of the inlet valve opening, chamber (14) is filled with hydraulic medium by means of inlet channel (15) during inlet valve closing so that relative movement of auxiliary piston (13) in relation to piston device (9) can be caused. Hydraulic medium leaves chamber (14) during displacing movement of the inlet valve by means of outlet valve (17). As a result, displacement of the inlet valve in a peak phase of inlet valve opening remains unchanged.

EFFECT: improvement of cylinder gas exchange.

5 cl, 15 dwg

FIELD: engines and pumps.

SUBSTANCE: control system traces instant position of pistons in engine cylinder to open the intake valve open position of which allows combustion products to flow from external combustion chamber to working chamber of the piston wherein energy of expanding combustion products forced from external combustion chamber drives the piston. Kinetic energy of said piston is transmitted via piston rod and con-rod coupled therewith at crankshaft position that allows its spinning in preset direction.

EFFECT: higher efficiency of engine control.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: control system attaches a shaft of a reversing starter mechanism to a crank shaft by an internal combustion engine (ICE) and rotates it. At the end of a compression stroke, the control system supplies air from pneumatic accumulators to a cavity of a plunger actuator of a fuel injector, and fuel is sprayed to a combustion chamber with its ignition by an ignition plug. After that, the system disconnects the shaft of the reversing starter with ICE crank shaft. After combustion is completed, the system supplies the air from the pneumatic accumulator to the cavity of the actuator piston of the outlet valve and opens it. The pneumatic control system by gas distribution and spray of fuel allows efficient operation of ICE both in one and the other direction of the shaft rotation.

EFFECT: improving efficiency of control at reversing of an internal combustion engine.

3 dwg

FIELD: machine building.

SUBSTANCE: gases in the cylinder move the compressor piston that pumps the atmosphere air via the check valve to the common pneumatic accumulator for all cylinders. During suction cycle in the cylinder the compressor spring moves its piston to the initial position, and atmosphere air via the check valve is pumped in the compressor cavity. To open valve of the internal-combustion engine the control system sets its slide in the position where air from the common pneumatic accumulator enters the valve drive cavity and opens the valve. Closing is performed in the reverse order. For the fuel supply to the combustion chamber the control system sets the slide of air flow control to the position where air from the common pneumatic accumulator enters the cavity of the sprayer plunger drive. The drive of the sprayer piston moves the plunger and ensures injection. The sprayer plunger preparation for next injection is performed in reverse order, as result fuel from the tank via the check valve is supplied to the cavity of the sprayer plunger.

EFFECT: improved efficiency of operation of the internal-combustion engine due to gas distribution adjustment.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: at compression stroke in first cylinder, air or fuel mix press against compressor drive piston end surface to drive compressor piston so that working fluid is displaced via check valve into hydraulic accumulator. At a time, fluid from compensation tank is fed via check valve into opposite chamber. After first cylinder piston reached TDC in second cylinder at compression step or at fuel combustion step and expansion of combustion products, air, mix or combustion products press against second cylinder compressor drive piston end surface. This makes compressor drive piston displace the compressor piston engaged therewith to feed working fluid from opposite chamber via check valve into hydraulic accumulator. Thereafter, this cycle reiterates.

EFFECT: unified drive for control over valve body and fuel atomiser.

2 dwg

FIELD: machine building.

SUBSTANCE: invention can be implemented in mechanisms of gas distribution of internal combustion engines (ICE), particularly in devices for regulation of phases of gas distribution and valve stroke. The device for control over the drive of the ICE valve consists of distributing shaft (2) with cams (3), of lever-pusher (4) with movable bracket (5), of core-rod (6), of electro-magnet (7) of a valve stroke, of guide (8) of the valve drive, of control hydro-cylinder (9) and control electro-magnet (10) of regulation of valve timing. Lever-pusher (4) contains roller (11). Roller (11) is kinematically tied with cam (3). Movable bracket (5) is coupled with core (12) of control electro-magnet (10) of regulation of valve timing. Lever-pusher (4) contacts valve (13) and is connected with guide (8) of valve drive via axle (14). Axle (14) is arranged in a through slot of core-rod (6). Guide (8) of valve drive is installed in controlling hydro-cylinder (9). Core-rod (6) rests on piston (15) of controlling hydro-cylinder (9). Spring (16) is installed between guide (8) of valve drive and core rod (6).

EFFECT: optimal speed of air or fuel-air mixture at various moments of intake stroke and optimal amount of fuel intakes.

5 dwg

FIELD: machine building.

SUBSTANCE: invention can be implemented in mechanisms of gas distribution of internal combustion engines (ICE), particularly in devices for regulation of phases of gas distribution and valve stroke. The device for control over the drive of the ICE valve consists of distributing shaft (2) with cams (3), of lever-pusher (4) with movable bracket (5), of core-rod (6), of electro-magnet (7) of a valve stroke, of guide (8) of the valve drive, of control hydro-cylinder (9) and control electro-magnet (10) of regulation of valve timing. Lever-pusher (4) contains roller (11). Roller (11) is kinematically tied with cam (3). Movable bracket (5) is coupled with core (12) of control electro-magnet (10) of regulation of valve timing. Lever-pusher (4) contacts valve (13) and is connected with guide (8) of valve drive via axle (14). Axle (14) is arranged in a through slot of core-rod (6). Guide (8) of valve drive is installed in controlling hydro-cylinder (9). Core-rod (6) rests on piston (15) of controlling hydro-cylinder (9). Spring (16) is installed between guide (8) of valve drive and core rod (6).

EFFECT: optimal speed of air or fuel-air mixture at various moments of intake stroke and optimal amount of fuel intakes.

5 dwg

FIELD: engines and pumps.

SUBSTANCE: claimed system comprises gas pressure control valve, and intake-exhaust valve to allow intake at one position at opposite position. At intake, control system opens the gas pressure control valve while intake-exhaust valve is set to intake position. At exhaust, control system opens the gas pressure control valve while intake-exhaust valve is set to exhaust position. Control system traces the ICE pistons current position to define opening and closing moments for every valve in compliance with load at ICE. Said system sets the valve control slide valve to position whereat gas is fed from the drive system pneumatic accumulator into the valve drive piston chamber to be actuated. Used gas flows from opposite chamber of appropriate valve into compensating pneumatic accumulator, then, into pistons of the compressor driven by air or mix at compression stroke, or by combustion products at expansion stroke. Compressed gas charges the pneumatic accumulator.

EFFECT: higher efficiency of gas exchange.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: method of axle spacing motion compensation is intended for use in a gas distribution mechanism (1) provided with a valve gas distribution of an internal combustion engine in which at least one camshaft (3) is installed in the cylinder head (2) of the internal combustion engine and is driven by cylindrical gears. One drive cylindrical gear (8) is provided on the crankshaft (10) mounted in the cylinder block (9) of the internal combustion engine. One drive cylindrical gear (4) is provided on the camshaft (3). At least one intermediate gear (5), (6) is mounted on the trunnion support (12), (13). The gas distribution mechanism (1) has at least one means for equalizing the variation of the axle spacing between the crankshaft and the camshaft caused by the repair work. The method consists in that, in the case of a purpose-defined change in the axle spacing, in the case of repair, a single or multi-row interchangeable intermediate gear (7) is used instead of the original intermediate gear (6) or instead of the original gear (6), which is part of the original intermediate gear. The intermediate gear (7) is configured to equalize the axle spacing by a certain amount. Gas-distributing mechanism of internal combustion engine is disclosed.

EFFECT: simplified equalizing of the interaxal distances appearing in the repaired states.

12 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: valve gas control mechanism is designed for an internal combustion engine. At least one camshaft of the engine is installed in the engine cylinder head and driven by cylindrical gearwheels. The driving cylindrical gearwheel is placed on the crankshaft installed in the engine cylinder block. The driven cylindrical gearwheel is located on the camshaft. There is at least one adjustable intermediate gear installed on a trunnion (13). The trunnion (13) for the intermediate gear is designed to lock in at least two positions on the end face (9a) of the internal combustion engine. The above mentioned positions correspond to the new state of the engine and specified repair state of the engine with purposefully changed distances between the axes of the crankshaft and camshaft. There are channels (16), (18) for lubrication oil open to the end face (9a) and provided on the end face (9a). The channels, being in one position or another of the intermediate gearwheel, are located coaxially with the lubrication oil channel in the trunnion (13) of the intermediate gearwheel. The lubrication oil channels (16), (18) are oriented in such a way that the trunnion (13), in one or the other position, closes one corresponding channel of the channels (16), (18) for lubrication oil.

EFFECT: simplified manufacture and assembly of the valve gas control mechanism.

12 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: actuating unit comprises a disk and a rod that form a piston. A rod is attached to the disk and axially exposes from it. A disk divides a cylinder volume into the first and the second parts and is capable of anaxial movement between active and inactive positions, and a rod is capable of an axial movementin concordance with the disk movement. The unit also comprises a pressurized fluid circuit that is designed with a possibility of controlled fluid communication and with the cylinder volume first part. The unit has the first hydraulic circuit (21) that comprises a fluid-filled space (22). A piston of an actuating unit comprises the second hydraulic circuit (24). A space (22) is in communication with a central hole through the fluid (25) in the second circuit (24) when the piston disk is in the inactive position. A hole (25) is semi-bounded by a positioning piston (29) that is capable of an out-in traverse axially towards the piston and of a pressing on a gas-exchanging valve in the cylinder volume second part. A second circuit (24) comprises a valve (27) that is configured to prevent the fluid flow from the hole (25). A rod has an exposed end (30) that is partially thrust against a stop surface (31) in the space (22) when the disk is in the inactive position. A piston area (29), that faces the central hole (25), is less than or equal to the pressurized exposed end (30) area of the actuating unit piston rod.

EFFECT: actuating unit piston rod is always in the inactive defined position when the engine valve is closed or the actuating unit is inactive.

5 cl, 5 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: intake and exhaust valves of valve-timing mechanism of internal combustion engine are installed outside combustion chamber for reciprocation in intake and exhaust ducts, being acted upon by drives and closing of intake and exhaust ports from outer side of combustion chamber. Each drive is essentially hydraulic system with hydraulic distributor and cylinder communicating through pipelines, and hydraulic drive made for fastening on head of cylinder block. Hydraulic drive has piston coupled with valve and installed in housing for reciprocation. Hydraulic brakes arranged in space of hydraulic drive housing are filled with liquid and are provided with holes to let out said liquid. Projections are made on opposite ends of hydraulic drive piston to fit them in slots of corresponding hydraulic brakes. Cylinder of hydraulic distributor is connected with electric motor. Piston of hydraulic drive and valve are connected by means of rocker and movable joint. Invention provides description of method of valve timing.

EFFECT: simplified drive and algorithm of valve control.

8 cl, 12 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: proposed valve-timing mechanism contains oil pump, valve operating cylinders coupled with engine valves and with spool distributor with housing, shaft, rotor with oil pass channels, upper frame with oil line unions, and lower frame with oil inlet-outlet unions. Frames are fixed in housing. Engine crankshaft sets into rotation shaft with fitted-on rotor through gear wheel by means of belt. Shaft is provided with straight and skew splines and screw cut and is installed in housing on bearings for rotation and axial displacement. Rotor is provided with opposite skew splines in connection with shaft, and gear wheel is connected with shaft by spline joint. Electric motor is coupled with shaft by screw cut. Spool distributor is provided both in circuit of operating mechanism of intake valves and in circuit of operating mechanism of exhaust valves.

EFFECT: simplified design, enlarged operating capabilities of engine.

5 cl, 7 dwg

FIELD: mechanical engineering; internal combustion engine.

SUBSTANCE: device to control valves of timing gear of internal combustion engine contains hydraulic actuators functionally coupled with each valve of timing gear. Each actuator contains one control piston acting onto valve and two working spaces limited by said piston among which first working space whose pressure provides displacement of valve of timing gear in direction of closing is constantly filled with working liquid under pressure, and second working space pressure of which provides displacement of timing gear valve in direction of opening is made for alternately building up working pressure in space and drop of working pressure by means of first and second control valves employing electric drive. Provision is made for delivery of common electric control signal to second control valves united preferably into common valve unit for pair of actuators which control operation of two valves of timing gear used as intake on exhaust valves of one of cylinders of internal combustion engine.

EFFECT: reduced cost of manufacture.

10 cl, 7 dwg

FIELD: engines and pumps.

SUBSTANCE: pressure pulse generation device incorporates a cylinder, a piston fitted in the said cylinder to reciprocate therein, a circuit of working flowing medium including inlet and outlet from the cylinder on one side of the piston , the connecting rod linked to the piston and chamber filled with liquid Note that, the connecting rod can move through the said chamber with the piston reciprocating in cylinder. The device incorporates, at least, one valve element to temporarily interrupt the liquid release from the chamber.

EFFECT: efficient arrangement of the valve inside the cylinder.

30 cl, 14 dwg

FIELD: engines and pumps.

SUBSTANCE: device to generate the pressure pulses incorporates a working liquid medium source and the working medium lower-pressure space, a working medium circuit, a valve body arranged in the chamber and moving therein, the first circuit tap and the second one to communicate with the valve body opposite parts, a chamber with an orifice on one side of the said valve body, the said orifice communicating with the first tap to allow the working medium come out of the chamber. The valve body, acted upon by the working fluid in taps, can move to its first position to stop the orifice to be opened to release the working medium. The device contains a valve element to allow or interrupt the communication between the chamber and the working medium source via the second tap arranged above the before said chamber stream wise of the working liquid medium.

EFFECT: generation of pressure pulses with high frequency and accuracy without losses of the working medium.

21 cl, 10 dwg

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