30 results about "Naturally aspirated engine" patented technology

A system and method for controlling a multiple cylinder internal combustion engine having an exhaust gas turbocharger with a compressor coupled to a turbine include redirecting substantially all intake airflow around the compressor and substantially all exhaust flow around the turbine when an engine operating parameter exceeds an associated threshold. In one embodiment, turbocharger boost is provided below an associated engine speed threshold with the turbocharger compressor and turbine bypassed at higher engine speeds such that the engine operates as a naturally aspirated engine.

The invention relates to a system for reverse crankcase ventilation during boosted engine operation. Positive crankcase ventilation (PCV) systems have been employed on naturally-aspirated engines for over half a century. The gases in the crankcase exit the engine into the engine intake due to the slightly elevated pressure in the crankcase. Flow is controlled via a PCV valve in a PCV duct. In pressure-charged engines, PCV flow stops when pressure in the intake exceeds that of the crankcase. Such stagnation leads to sludging and deposit formation. According to an embodiment of the disclosure, reverse flow through the system is allowed by installing a second PCV valve in parallel with the normally-provided PCV valve, with the second PCV valve allowing an opposite direction of flow. Oil separators are provided on both PCV ducts to and from the engine to remove oil from blowby gases for flow in either direction.

An auxiliary device for braking booster of cars, comprises of the intake manifold, braking booster, vacuum line, single direction valve, with the intake manifold connects with the braking booster by vacuum lines through single direction valve; it also includes braking boosting auxiliary pump and the connecting lines to increase the evacuation; vacuum lines led out by the intake manifold, connects with the outlet of the braking boosting auxiliary pump, whose another two lines are separately connected with the intake line to the intake guiding tube, and the other with the front of the braking boosting vacuum lines. As to the naturally aspirated engine, the intake lines are connected to the front of the throttle valve. While, the intake lines connect to the front of gas booster for the supercharging engine. Due to the adoption of Venturi affect theory on braking boosting auxiliary pump, to some degree, it can effectively increase the evacuation of the braking booster and improve the security of the car. The merit is even obvious when this device applies to cars with vacuum braking booster, and the one with the gas booster of insufficient vacuum of the intake manifold, in particular.

The invention discloses an air inlet manifold for a supercharged gasoline engine, comprising a pressure stabilizing chamber made of an aluminum alloy material, an air inlet flange arranged at one end of the pressure stabilizing chamber, a first air passage, a second air passage, a third air passage, a fourth air passage and cylinder cover joint flanges, wherein the first air passage, the second air passage, the third air passage and the fourth air passage are communicated with the pressure stabilizing chamber; and the cylinder cover joint flanges are arranged at the mouths of the first air passage, the second air passage, the third air passage and the fourth air passage. The air inlet manifold is characterized in that: a connection part between the air inlet flange and the pressure stabilizing chamber is of a smooth transition structure; the bottom of the pressure stabilizing chamber is provided with two first bracket mounting lugs, and the lower part of the air inlet flange is provided with a second bracket mounting lug; and the first bracket mounting lugs and the second bracket mounting lug are respectively connected to a cylinder body through first brackets and a second bracket. By means of the air inlet manifold disclosed by the invention, the local vibration acceleration level and the local surface high-frequency vibration speed level are reduced under the condition of keeping a material of an air inlet manifold of a common naturally-aspirated engine unchanged, and the surface radiation noise is effectively reduced; and not only are using requirements of the supercharged gasoline engine met, but also the cost and the weight of the overall automobile are not increased on the premise of not increasing the material cost and the manufacturing process difficulty.

The invention discloses an electronic control fuel injection system of a small general gasoline engine and relates to an improvement technology of a small general engine control system. The technical scheme includes that firstly, a control system is used and comprises a sensor, a control unit and an actuator, an engine is a single cylinder four-stroke naturally aspirated engine, the sensor senses a crankshaft position triggering signal and a camshaft position triggering signal and sends the signals to the control unit, and the control unit controls a stepping motor, an ignition coil, an oil sprayer and an oil pump to work; secondly, when the small general gasoline engine works, a top dead center of a compression stroke is determined in the operating process of the small engine; and thirdly, the operating state of the small engine is controlled directly by a traditional engine idle speed control mode,namely, an idle speed control valve mode. The electronic control fuel injection system is applicable to the small general engine, and electronic fuel injection, ignition control and gas inlet control of the small general engine are achieved.

The invention discloses a working-station-variable turbocharger. The working stations of the turbocharger can be changed manually according to the working conditions of an engine, so that the turbocharger is better matched with the working conditions of the engine, the variable working stations of the working-station-variable turbocharger are driven by a servo motor, the intervention degree of a worm wheel is linear, and the aborting feeling generated by the sudden intervention of the worm wheel does not exist. When the engine rotates at a low speed, the worm wheel can be positioned in the fully idle working station, resistance during the exhaust of the engine is greatly reduced, the performance of the engine is further improved, and the service life of the turbocharger is also prolonged. When the service life of the turbocharger reaches the limit, the working stations of the turbocharger can be changed to be the idle working stations, so that a gas distribution system of the engine is not affected and can be compared with that of a naturally-aspirated engine; therefore, the usage and maintenance cost of the turbocharger is reduced, and the economy is better.

A system (100) for controlling emissions of exhaust gases in said naturally aspirated engine is disclosed. The system includes an open loop exhaust gas recirculation flow. The system (100) further includes a catalyst (102) mounted at exhaust manifold (106) of the engine. Furthermore the system (100) includes an exhaust gas mixing tube inserted into intake elbow (104) (mixing tube). The system (100) further includes an exhaust gas recirculation valve (110) mounted on cold side of EGR cooler. Furthermore, the system (100) includes an electronic control unit to control exhaust gas recirculation valve (110) along with various other engine calibration parameters.

The invention provides a three-way catalytic converter carbon deposit cleaning agent specially used for a naturally aspirated engine, belonging to the technical field of engine cleaning agents. According to the three-way catalytic converter carbon deposit cleaning agent specially used for the naturally aspirated engine provided by the invention, the carbon deposit cleaning agent comprises the following raw materials in parts by weight: 10-30 parts of organic acid, 0.1-1 part of modified calcium lignosulphonate, 1-8 parts of a surfactant, 70-100 parts of water, 5-15 parts of bentonite and 0.1-1 part of cellulose; the preparation method of the cleaning agent provided by the invention comprises the step of mixing the organic acid, the modified calcium lignosulphonate, the surfactant, the water, the bentonite and the cellulose uniformly at room temperature; the cleaning agent provided by the invention can thoroughly clear carbon deposit impurities on a three-way catalytic converter, clears difficult-to-clean places such as corners and concave portions of a three-way catalytic converter specially used for the naturally aspirated engine particularly effectively, and can prevent the engine from being corroded.

The invention provides an intake gas heating device of a naturally aspirated engine, and belongs to the technical field of engines. The intake gas heating device comprises the engine, a water cavity, a temperature sensor, a water tank, a water pump and an electrometric valve, an engine gas inlet pipe between a gas filter and a throttle valve penetrates through the water cavity, the temperature sensor is arranged on an engine gas inlet pipe behind the gas filter, an engine exhaust pipe behind a silencer penetrates through the water tank, the two ends of a water cavity water inlet pipe are connected with the water cavity and the water tank respectively, the two ends of a water cavity water outlet pipe are connected with the water cavity and the water tank respectively, and the water pump and the electromagnetic valve are arranged on the water cavity water inlet pipe. In the intake gas heating device, the waste heat of the engine exhaust gas can be used for heating water in a water container, and therefore the engine intake gas can be heated. The intake gas heating device is reasonable in structure, simple in design and suitable for the design of engine exhaust gas waste heat utilization systems.

The invention discloses exhausting ducts of a naturally aspirated engine. The exhausting ducts comprise exhausting duct bodies arranged on a cylinder cover inside the naturally aspirated engine and exhausting outlets formed in the exhausting duct bodies correspondingly. The exhausting duct bodies are mutually independent and connectionless. A bent pipe part and a flow channel part are arranged in any one exhausting duct body, wherein the sectional areas of the bent pipe part are equal everywhere, and the flow channel part is of uniform cross section structure or diverging pipe structure. The exhausting outlets are connected with externally-connected exhausting duct body sections correspondingly. The overall lengths of the exhausting duct bodies in the cylinder cover to a naturally aspirated engine catalytic converter are determined by adjusting the lengths of the externally-connected exhausting duct body sections. The exhausting ducts have the advantages that through the exhausting ducts, the naturally aspirated engine is good in fuel economy, and the waste gas residual amount is reduced.

The invention relates to an auxiliary tool for connecting an engine with a process exhaust device in a hot test, which comprises a rectangular shaping plate, a protective plate and two handle components, the front side of the rectangular shaping plate is in contact with the process exhaust device, the upper side of the protective plate is vertically connected with the rear side of the rectangular shaping plate, and the process exhaust device is attached to an exhaust surface of an engine cylinder cover; the protection plate is connected with the process exhaust device through a long bolt; limiting components are arranged on the left side and the right side of the protection plate respectively. One ends of the two pairs of limiting components respectively penetrate through the process exhaust device and are connected with the exhaust surface of the engine cylinder cover; the structure of the process exhaust device is the same as that of the exhaust manifold, the process exhaust device is of a cavity structure, the upper portion of the process exhaust device is provided with a combination face, the lower portion of the process exhaust device is provided with an exhaust pipe, and the combination face is provided with exhaust holes and attached to the exhaust face of the engine cylinder cover. The air exhaust accessory can solve the problem that a naturally aspirated engine hot test original air exhaust accessory is too large in size and inconvenient to install, can also solve the problem that the assembling space is limited, and is convenient and fast to operate, safe and reliable.

Systems (100, 200 and 300) and methods (400, 500 and 600) for controlling exhaust gas emissions from naturally aspirated engine are disclosed. The system (100, 200 and 300) includes an open loop exhaust gas recirculation flow to the engine. The system (100, 200 and 300) includes a diesel oxidation catalyst (102, 202 and 302) mounted on or near exhaust manifold (106, 206 and 306) of the engine. Furthermore, the system (100 and 200) includes an exhaust gas mixing conduit (114 and 214) inserted into air intake conduit (104 and 204). The system (100, 200 and 300) further includes an exhaust gas recirculation valve (110, 210 and 310) mounted on cold side or a hot side of EGR cooler. Furthermore, the system (100, 210 and 310) includes an electronic control unit to control exhaust gas recirculation valve (110, 210 and 310) along with various other engine calibration parameters.

A dual-sliding-body synchronous movement system belongs to the technical field of internal combustion engines and comprises an engine intake pipe, an engine, an engine exhaust pipe, a guide-leaf plate, a rotating shaft, a push-pull rod, a control body, springs, a moving body, sliding bodies and a connecting pipe, wherein the guide-leaf plate is arranged in an air inlet branch and fixedly connected with the rotating shaft; one end of the push-pull rod is hinged to the guide-leaf plate, and the other end of the push-pull rod is hinged to the moving body after penetrating the lower wall surface of the control body; the sliding bodies are connected through the springs; one end of the connecting pipe is communicated with the lower cavity of the control body, and the other end of the connecting pipe is communicated with the engine exhaust pipe, between a catalyst pack and a noise damper. When the engine works under the low-speed working condition, intake flow tumbling is relatively strong; when the engine works under the high-speed working condition, the pumping loss is low. The dual-sliding-body synchronous movement system is reasonable in design, simple in structure and suitable for optimal design of the air intake system of a naturally aspirated engine.

The invention provides a parallel automobile engine air intake system. The parallel automobile engine air intake system comprises a body. The body comprises a bypass air inlet which is formed in an air intake pipe of an existing natural air intake engine or formed in a shell at one side of an air outlet of an air filter, and the bypass air inlet is connected with an outlet of an air supercharger; and an inlet of the air supercharger is connected with a second air filter, and thus the body with a natural air intake system and a supercharging air intake system working in parallel is formed. According to the parallel automobile engine air intake system, the air supercharger is additionally arranged and is made to operate in parallel with the original natural air intake system in parallel, so that air inflow of an engine is increased, and under the conditions that safety is guaranteed and energy consumption is reduced, pollution is reduced, and the output power of the engine is increased. Meanwhile, since the air supercharger can be driven by a small-power motor, an excessive load, caused by the air supercharger, to an existing automobile power generation system is avoided, and production cost is effectively reduced.

A dual-sliding-body synchronous stretching system belongs to the technical field of internal combustion engines and comprises an engine intake pipe, an engine, an engine exhaust pipe, a guide-leaf plate, a rotating shaft, a push-pull rod, a control body, springs, a moving body, sliding bodies and a connecting pipe, wherein the guide-leaf plate is arranged in an air inlet branch and fixedly connected with the rotating shaft; one end of the push-pull rod is hinged to the guide-leaf plate, and the other end of the push-pull rod is hinged to the moving body after penetrating the lower wall surface of the control body; the sliding bodies are connected through the springs; one end of the connecting pipe is communicated with the lower cavity of the control body, and the other end of the connecting pipe is communicated with the engine exhaust pipe, between a catalyst pack and a noise damper, of the engine. When the engine works under the low-speed working condition, intake flow tumbling is relatively strong; when the engine works under the high-speed working condition, the pumping loss is low. The dual-sliding-body synchronous stretching system is reasonable in design, simple in structure and suitable for optimal design of the air intake system of a naturally aspirated engine.