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INVENTION
Russian Federation Patent RU2088768
Gas & gasoline dual-fuel internal combustion engine with turbocharged
Name of applicant: All-Russian Scientific Research Institute of Natural Gases and Gas Technologies
Name of the inventor: Zhabin VM
The name of the patentee: All-Russian Scientific Research Institute of Natural Gases and Gas Technologies
Address for correspondence:
Starting date of the patent: 1994.08.03
Usage: The invention relates to engine, and more specifically - a bi-fuel internal combustion engines with turbocharged, used mainly in automobiles. The inventive between the air filter 18 and a gas adapter-mixer 6 carburetor 15 have air distribution device 19 formed as a hollow spacer with placed axially in the inner cavity of the automatic check valve 20 and seat 21, dividing the inner cavity of the spacer into two communicating a cavity between 22 and 23. The distribution device 19 is provided with air nozzles 24 and 25, intended for internal cavities posts 22 and 23 with a turbocharger. Moreover, the air distribution device 19 is further provided with a pneumatic control system, made in the form of a cylinder 26 with piston 27 positioned therein, kinematically connected with a plate rod 20 of the automatic valve is equipped with a turbocharger 28. The engine 29, in turn comprising a gas turbine 30 driven by exhaust gases and a compressor 31 for supplying compressed air to the gas turbine engine 32. The gas inlet pipe 30 connected to its exhaust manifold 33 and the engine 32 for discharging exhaust gas to the atmosphere is provided with a discharge duct 34. compressor air intake pipe 31 through its intake pipe 35 communicated with the air nozzle 24, and air Bleed pipe 31 of the compressor through the discharge pipe 36 in communication with an air pipe 25 of the air distribution device 19. The exhaust manifold 33 is provided with a bypass line 37 with a relief body 38. The space above the piston of the pneumatic cylinder 26 communicated with the suction pipe 31 of the compressor section of the pipeline 39 with a small adjustment screw 40. The heating air conduit 36 communicates on the one hand through a balancing pipe naddiafragmennoy cavity 41 of the first stage, on the other - through a balancing pipe 42 - naddiafragmennoy cavity with the second-stage gas gear 5.
DESCRIPTION OF THE INVENTION
The invention relates to engine and more particularly to a bi-fuel internal combustion engines with turbocharged used mainly in automobiles.
Known internal combustion engines with turbocharged containing a piston internal combustion engine installed in the exhaust duct of the gas turbine of the turbocharger, operating a wheel mounted on the same shaft as the rotor of a centrifugal supercharger, which is located in the inlet pipeline (internal combustion engines. Design and operation of piston and combined engines . Ed. A. Orlin, MI Mechanical Engineering, 1970, pp. 7-8).
When the supercharged air density is increased and, therefore, increases the amount of fresh charge which have arrived at the inlet to the cylinder, as compared with the air charge in the same engine without turbocharging.
However carburetor petrol engines with turbocharged have a number of drawbacks.
These disadvantages include the fact that with increasing pressure increases the boost pressure and temperature of the mixture at the compression end, whereby the combustion mixture becomes easy detonation character. In order to avoid detonation accounts or lowering the compression ratio of the engine carburetor, or use more expensive gasoline with a higher octane number.
Of the known internal combustion engines with turbocharged closest the technical essence and achieved result is an internal combustion engine (VG Grigoriev Kolubaev VD Erokhov VI et al. Of gas-cylinder cars, 1989, p.37, Figure .12) comprising an inlet conduit attached to it with a successively carburetor adapter-mixer nozzles and air inlet gas and the air filter, exhaust pipe for discharging exhaust gas from the exhaust manifold to the atmosphere line for supplying fuel to the carburetor equipped with a solenoid valve the fuel filter, the gas supply pipe into the adapter-mixer in which sequentially set the high pressure regulator, a solenoid valve with a gas filter and a low-pressure two-stage reducer.
However, conventional combustion engines have a number of significant drawbacks. These disadvantages are that the translation engine from petrol to compressed natural gas (at a constant compression ratio) is accompanied by lowering of its maximum capacity of 18 22% implies that, in turn, affects the car capacity. In addition, the reduction in the maximum power gas engines running on compressed natural gas, accompanied by a deterioration tyagovodinamicheskih and vehicle performance.
To improve the cardinality and economic performance of the engine at partial and full load by improving the regulation of the composition of gas-air mixture is proposed dual fuel Gas & gasoline internal combustion engine with a turbocharged, equipped with a turbocharger with a suction Air Bleed and gas inlet pipes, the latter of which is in communication with the exhaust manifold, fitted with a body of the bypass outlet gas driven control, and between the air filter and the adapter-mixer set air distribution device in the form of spacers, within which coaxially positioned automatic check valve separating the interior space into two cavities, one of which communicates with the air filter and the suction nozzle turbocharger and the other, with the adapter-mixer, and through the discharge conduit from air Bleed nozzle turbocharger, the discharge line communicates with naddiafragmennymi cavities of the first and second gear stage low-pressure air distribution device is further provided with a pneumatic control system, made in the form of a cylinder disposed in it piston, kinematically connected with a plate of the automatic valve, nadporshnevoe a cylinder space which through a conduit of small cross-section communicated with the suction nozzle turbocharger, and a pipeline of small cross-section is provided with an adjusting screw.
The drawing schematically shows an apparatus Gas & gasoline dual fuel internal combustion engine turbocharged.
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Bi-Fuel Gas & gasoline internal combustion engine with a turbocharged contains a main valve 1, gas heater 2, a single-stage high-pressure reducer 3, the solenoid valve with a gas filter 4, a two-stage gas reducer low pressure 5 and a gas adapter mixer 6, communicating with each other gas pipelines of high pressure 7, 8, 9 and 10 and the low pressure trubroprovodami 11 and 12. Gasoline fuel supply system for the engine includes a fuel tank (not shown), the fuel pump 13, the solenoid valve with a gasoline filter 14 and the carburetor 15, communicating with each other through a gasoline pipe 16 and 17. Between the air filter 18 and a gas adapter-mixer 6 is arranged an air distribution device 19 formed as a hollow spacer to placed axially in an inner cavity of an automatic check valve 20 and seat 21, dividing the inner cavity of the spacer into two interconnected cavities 22 and 23. The dispenser 10 is provided with 24 and 25 air nozzles. Moreover, the air distribution device 19 is further provided with a pneumatic control system, made in the form of a cylinder 26 with a piston disposed therein 27, kinematically connected with a plate 20 of the automatic valve stem 28. The engine equipped with the turbocharger 29, in turn comprising a gas turbine 30 driven by exhaust gases and a compressor 31 for supplying compressed air to the engine 32. Gas turbine nozzle 30 to its gas inlet connected to the exhaust manifold 33 and the engine 32 for discharging exhaust gas to the atmosphere is provided with the outlet 34. |
Compressor air intake pipe 31 through its intake pipe 35 communicated with the air nozzle 24, and Air Bleed pipe through the discharge pipe 36 in communication with an air pipe 25 of the air distribution device 19.
The exhaust manifold 33 is provided with a bypass line 37 equipped with a bypass, in turn, control body 38.
Space above the piston of the pneumatic cylinder 26 communicated with the suction pipe 31 of the compressor section 39 of small pipe with the adjusting screw 40.
Pressure air conduit 36 communicates on the one hand through a balancing pipe naddiafragmennoy cavity 41 of the first stage, and on the other through a tube 42 with a balancing cavity naddiafragmennoy second stage gas gear 5.
Manifold Valve 1 and fuel pump 13 through a piping system and valves communicated respectively with gas cylinders and fuel tank (not shown).
WORK IS AS FOLLOWS
When operating on gas fuel, compressed natural gas from high pressure cylinders (not shown) through the open consumable (not shown) and a main gas valve 1 and the conduit 7 flows into the gas preheater 2 2. From heater preheated gas through the gas conduit 8 is supplied to a single-stage reducer 3, high pressure, where the gas pressure is reduced to 0.8-1.2 MPa. The heated gas passing through a main solenoid valve with a gas filter 4, cleaned of solids and gas through the conduit 10 enters the first stage of two-stage low-pressure gas-reducer 5, wherein the pressure is reduced to 0.18-0.20 MPa. The gas is then fed from the first stage to the second gear stage, where its pressure is reduced to atmospheric pressure.
Subsequently, the gas from the second stage low pressure regulator enters the metering economizer device providing the correct amount of gas in the gas-air adapter mixer 6 carburetor 15 where it is mixed with the purified compressed air coming simultaneously from the air cleaner 18 through the cavity 22 of air distribution device 19, the suction pipe 35, a compressor 31, discharge line 36 and a lower cavity 23 to form a combustible mixture. Reverse air valve 20 thus by differences in pressure between the cavities 22 and 23 
on the one hand and by the additional force on check valve 20 exerted due to the depression created in the suction pipe of the compressor 31 and transmitted through the half-open the adjusting screw 40 and duct 39 of small cross section, and the overpiston space 26 of the pneumatic cylinder, is pressed tightly against the valve seat 21. The piston 27 at this point is in the extreme (upper in the figure) position. Cross-sectional area of the cylinder 26 and a small pipe section 39 are selected so that even at low loads of the engine, and therefore a relatively low rotational frequencies of the compressor 31 in the cylinder 26, a vacuum sufficient to hold the valve disc 20 is closed. With the help of the adjusting screw 40 achieved the required sensitivity of operation of pneumatic control systems. The resulting fuel-air mixture in a mixer, having a higher density compared with the gas mixture from ambient air aspirated into the engine through the mixing chamber and diffuser carburetor mixer (not shown) is directed into the intake manifold and distributed to the individual engine cylinders. The mixture entering the engine 32 at a pressure compensates for the loss of power compared to the power of the engine when operating on its benzovozdushnoy mixture.
When the engine exhaust gases passing through the exhaust manifold 33 and the bypass control body 38 rotates the gas turbine impeller 30, and with it the rotor 31 and the compressor, and the exhaust gases are removed to the atmosphere through the outlet 34.
When the load increases and, consequently, an increase in the charge air pressure is transmitted to the last cavity naddiafragmennye high and low pressure reducer. The increase in pressure cavities naddiaframennyh low and high pressure while vacuum in the cavity of the second stage low pressure reducer 5 is accompanied by increased pressure drop in the cavities of the first and second gear stage, which gives rise to forces on diaphragm actuators. These efforts are, respectively, of the diaphragm valves and high and low pressure. The degree of opening of the high and low pressure valves increases, which leads to a corresponding increase in fuel gas flow through these valves. All this generally leads to an increase in gas consumption in line with the increased air flow through the engine.
A further increase in the engine load causes an increase in the charge air pressure and, consequently, an increase in the degree of opening of the high and low pressure valves, respectively, first and second gear stage 5, which leads to an increase in gas flow in accordance with the increased engine load.
When the engine is running on gaseous fuel solenoid valve 4 is opened. Overflow control body 38 in the exhaust manifold 33 is set to supply exhaust gases to the gas turbine 30.
With the engine running on liquid fuel gasoline from the fuel tank (not shown) petrol pump 13 through a gasoline pipe 16, an open solenoid valve 14 and the gasoline pipe 17 is supplied to the carburetor 15, which at the same time through the air filter 18, the open check valve 20 and a lower cavity 23 enters the atmosphere air. The resulting air-fuel mixture in the carburetor 15 through the air collectors (not shown) enters the engine cylinders. The turbocharger 29 is not running, as in this case the exhaust manifold 33 through the bypass 38 and control organ bypass conduit 37 communicates with the outlet 34, bypassing the gas inlet nipple 30 of the gas turbine.
CLAIM
Bi-Fuel Gas & gasoline internal combustion engine with a turbocharged, containing the inlet pipeline with fixed on it consistently carburetor adapter-mixer nozzles air intake and gas and air filter, exhaust pipe, supply pipe of gasoline in the carburetor equipped with a solenoid valve and fuel filter, supply line gas into the adapter-mixer in which sequentially set the high-pressure regulator, a solenoid valve with a gas filter and a two-stage reducer of low pressure, characterized in that it is provided with a turbocharger with suction, Air Bleed and gas inlet pipes, the latter of which communicates with an outlet conduit, provided with a body recirculation of exhaust gases from the control actuator, and between the air filter and the adapter-mixer set air distribution device in the form of a hollow spacers, within which coaxially positioned automatic check valve separating the internal space of the spacer into two cavities, one of which communicates with an air filter and a suction pipe of the turbocharger and the other with an adapter-mixer and through the delivery conduit from air Bleed nozzle turbocharger, the discharge line communicates with naddiafragmennymi cavities of the first and second stages of the low pressure regulator and the air distribution device is further provided with a pneumatic control system, made in the form of a cylinder with a piston disposed therein, kinematically connected with a plate of the automatic valve, nadporshnevoe cylindrical space through which a small section of the pipeline communicated with the suction nozzle turbocharger, and a pipeline of small cross-section is provided with an adjusting screw.
print version
Publication date 26.12.2006gg
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