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44 results about "Indirect injection" patented technology

Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. In the last decade, gasoline engines equipped with indirect injection systems, wherein a fuel injector delivers the fuel at some point before the intake valve, have mostly fallen out of favor to direct injection. However, certain manufacturers such as Volkswagen and Toyota have developed a 'dual injection' system, combining direct injectors with port (indirect) injectors, combining the benefits of both types of fuel injection. Direct injection allows the fuel to be precisely metered into the combustion chamber under high pressure which can lead to greater power, fuel efficiency. The issue with direct injection is that it typically leads to greater amounts of particulate matter and with the fuel no longer contacting the intake valves, carbon can accumulate on the intake valves over time. Adding indirect injection keeps fuel spraying on the intake valves, reducing or eliminating the carbon accumulation on intake valves and in low load conditions, indirect injection allows for better fuel-air mixing. This system is mainly used in higher cost models due to the added expense and complexity.

In-situ droplet monitoring for self-tuning spectrometers

ActiveUS20060087651A1Fast dropletStable analytical signalParticle separator tubesMaterial analysis by optical meansLow noiseLaser scattering
A laser scattering based imaging technique is utilized in order to visualize the aerosol droplets in an inductively coupled plasma (ICP) torch from an aerosol source to the site of analytical measurements. The resulting snapshots provide key information about the spatial distribution of the aerosol introduced by direct and indirect injection devices: 1) a direct injection high efficiency nebulizer (DIHEN); 2) a large-bore DIHEN (LB-DIHEN); and 3) a PFA microflow nebulizer with a PFA Scott-type spray chamber. Moreover, particle image velocimetry (PUV) is used to study the in-situ behavior of the aerosol before interaction with, for example, plasma, while the individual surviving droplets are explored by particle tracking velocimetry (PTV). Further, the velocity distribution of the surviving droplets demonstrates the importance of the initial droplet velocities in complete desolvation of the aerosol for optimum analytical performance in ICP spectrometries. These new observations are important in the design of the next-generation direct injection devices for lower sample consumption, higher sensitivity, lower noise levels, suppressed matrix effects, and for developing smart spectrometers. For example, a controller can be provided to control the output of the aerosol source by controlling the configuration of the source or the gas flow rate via feedback information concerning the aerosol.
Owner:GEORGE WASHINGTON UNIV THE

Hydrogen engines and its burnt gas jet method

The invention discloses a hydrogen engine, which comprises a fuel gas supply system, an intake manifold, a CNG special spark plug and a cylinder, wherein, fuel gas injectors are arranged on different positions of the end part of the fuel gas supply system extending into a cylinder cover of the engine; and hydrogen is directly injected into the cylinder of the engine through the fuel gas injector or is indirectly injected into the cylinder of the engine through the fuel gas injector after mixing with inlet gas in an inlet channel. By adoption of the technical proposal, direct injection of hydrogen in the cylinder of the engine is realized; compared with a general hydrogen engine, higher charging efficiency and thermal efficiency are obtained by adoption of higher compression ratio, and the power and the torque of the engine are increased; moreover, the hydrogen engine has the advantages of high power output, high response speed and so on; simultaneously, the combustion is improved and the exhaust is reduced. The problems of premature combustion and backfire are solved by adoption of the control means of combination of direct injection in the cylinder and indirect injection of the inlet channel, and simultaneously the maximum potential and exhaust advantages of hydrogen engines are given full play.
Owner:CHERY AUTOMOBILE CO LTD

Combined air supply dual-fuel engine system with dual-needle valve fuel injector and combustion method

The invention discloses a combined air supply dual-fuel engine system with a dual-needle valve fuel injector and a combustion method, and belongs to the field of combustion methods of dual-fuel engines. The combined air supply dual-fuel engine system comprises an air inlet channel, an intake valve, an exhaust channel, an exhaust valve, a divided manifold low-pressure injection natural gas injection valve, a high-pressure in-cylinder direct injection natural gas injection valve, a dual-needle valve fuel injector, an omega-shaped combustion chamber and the like. When the engine operates at low load and medium load, the high-pressure in-cylinder direct injection natural gas injection valve is controlled to perform single or multiple gas injections into the cylinder; when the engine operates at high load, a combined air supply mode of the air inlet outside the cylinder and the direct injection inside the cylinder is adopted, and different fuel oil and gas injection control strategies are adopted under different engine operating conditions. By controlling the natural gas injection quantity, the injection times and the injection time of the divided manifold low-pressure injection naturalgas injection valve and the high-pressure in-cylinder direct injection natural gas injection valve, the high-efficiency low-emission combustion of the engine in the full operating conditions range can be achieved, thereby improving the in-cylinder combustion, widening the load range of the engine, and reducing NOx emission effectively.
Owner:HARBIN ENG UNIV

Alternate operation control type membrane-coupled organic waste treatment apparatus and method of operating the same

An organic waste treatment apparatus according to the present disclosure includes an acid fermenter 140, a methane fermenter 150, a thickener tank 300, and a separation membrane device 400, and includes: a first circulation line 141 in which a first circulation pump 141a is installed in a linked manner so that a part of organic waste being acid-fermented in the acid fermenter 140 is supplied to the methane fermenter 150; and a second circulation line 151 in which a second circulation pump 151a is installed in a linked manner so that a part of a anaerobic digestive fluid being methane-fermented in the methane fermenter 150 is supplied to the acid fermenter 140, in which the thickener tank 300 is installed between the methane fermenter 150 and the separation membrane device 400, supplied with concentrated circulating water from the separation membrane device 400, and supplies at least a part of the supplied concentrated circulating water to the methane fermenter 150 in an indirect injection manner, such that a means for perfectly removing offensive odor generated during a process of treating the anaerobic digestive fluid is organically coupled, and a high degree treatment process is performed, and as a result, it is possible to perfectly remove offensive odor and to reduce manpower and maintenance costs by automation of the entire facilities.
Owner:HYUNDAI ENGINEERING AND CONSTRUCTION

In-situ droplet monitoring for self-tuning spectrometers

A laser scattering based imaging technique is utilized in order to visualize the aerosol droplets in an inductively coupled plasma (ICP) torch from an aerosol source to the site of analytical measurements. The resulting snapshots provide key information about the spatial distribution of the aerosol introduced by direct and indirect injection devices: 1) a direct injection high efficiency nebulizer (DIHEN); 2) a large-bore DIHEN (LB-DIHEN); and 3) a PFA microflow nebulizer with a PFA Scott-type spray chamber. Moreover, particle image velocimetry (PIV) is used to study the in-situ behavior of the aerosol before interaction with, for example, plasma, while the individual surviving droplets are explored by particle tracking velocimetry (PTV). Further, the velocity distribution of the surviving droplets demonstrates the importance of the initial droplet velocities in complete desolvation of the aerosol for optimum analytical performance in ICP spectrometries. These new observations are important in the design of the next-generation direct injection devices for lower sample consumption, higher sensitivity, lower noise levels, suppressed matrix effects, and for developing smart spectrometers. For example, a controller can be provided to control the output of the aerosol source by controlling the configuration of the source or the gas flow rate via feedback information concerning the aerosol.
Owner:GEORGE WASHINGTON UNIVERSITY

Hydrogen engines and its burnt gas jet method

The invention discloses a hydrogen engine, which comprises a fuel gas supply system, an intake manifold, a CNG special spark plug and a cylinder, wherein, fuel gas injectors are arranged on different positions of the end part of the fuel gas supply system extending into a cylinder cover of the engine; and hydrogen is directly injected into the cylinder of the engine through the fuel gas injector or is indirectly injected into the cylinder of the engine through the fuel gas injector after mixing with inlet gas in an inlet channel. By adoption of the technical proposal, direct injection of hydrogen in the cylinder of the engine is realized; compared with a general hydrogen engine, higher charging efficiency and thermal efficiency are obtained by adoption of higher compression ratio, and thepower and the torque of the engine are increased; moreover, the hydrogen engine has the advantages of high power output, high response speed and so on; simultaneously, the combustion is improved and the exhaust is reduced. The problems of premature combustion and backfire are solved by adoption of the control means of combination of direct injection in the cylinder and indirect injection of the inlet channel, and simultaneously the maximum potential and exhaust advantages of hydrogen engines are given full play.
Owner:CHERY AUTOMOBILE CO LTD

Apparatus and method for measuring air flow of oil spray nozzle of indirect-injection diesel engine

The invention discloses an apparatus and method for measuring air flow of an oil spray nozzle of an indirect-injection diesel engine. The apparatus herein is provided with a digital display dial gauge on a top portion of an oil sprayer assembly. The bottom portion of the oil sprayer assembly is provided with a depthometer. The oil spray nozzle is installed on the oil sprayer assembly. The oil spray nozzle is communicated with an air flow meter via air delivery pipeline. The air flow meter is communicated with a vacuum pump via a pressure-regulating tank. Air delivery pipeline which makes the air flow meter and the pressure-regulating tank communicated is provided with an adjustable vacuum pressure meter thereon. The method herein comprises: a stage of installing the oil spray nozzle to be measured; a stage of setting measurement conditions and parameters; and a stage of outputting a tested result after the measurement. The apparatus and method have the beneficial effects of: the apparatus and the method are used for measuring the air flow of the oil spray nozzle of the indirect-injection diesel engine, and can rapidly and accurately detect associated indexes of a diesel product with a low testing cost, and are markedly significant in regulating the use quality of diesel in the fuel market and refraining the emission of the diesel vehicles.
Owner:TIANJIN HTC CO LTD
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