125results about How to "Increase exhaust pressure" patented technology

An exhaust purification apparatus for an engine has a first casing (17) that is interposed in an exhaust path (13); a second casing (23) that is set downstream of the first casing (17) and contains an exhaust purification device (24); a connecting pipe (22, 41, 51) that connects the first casing and the second casing (23) to each other and includes an insertion portion that is inserted in the first casing (17); and an injection nozzle (27, 52) that has a tip end inserted in the connecting pipe (22, 41, 51) and injects an auxiliary agent from the tip end. The insertion portion of the connecting pipe (22, 41, 51) is provided with a plurality of through-holes (22a, 41a, 41b, 51a) connecting the inside and the outside of the connecting pipe (22, 41, 51), so that the exhaust gas contained in the first casing (17) is introduced into the connecting pipe (22, 41, 51) through the through-holes and guided towards the second casing (23).

Methods and systems are provided for reducing turbo lag in a boosted engine. A boost reservoir coupled to the engine may be charged with compressed intake air and/or combusted exhaust gas. The pressurized charge may then be discharged during a tip-in to either the intake or the exhaust manifold.

Methods and systems are provided for reducing turbo lag by directing intake air from an intake manifold to an exhaust manifold. The intake air may be directed via an EGR passage by opening an EGR valve or by may be directed via engine cylinders by increasing positive valve overlap. Amounts of air directed via external EGR and air directed via positive valve overlap are based on engine operating conditions.

In one example, a method of operating an engine having a diesel particulate filter in a vehicle, the particulate filter having a length and depth, includes performing particulate filter regeneration in response to temperature variation across the length and/or depth of the particulate filter.

When an estimated value (A value) of an accumulation amount in a filter for trapping particulate matter reaches a prescribed value A1 corresponding to a prescribed accumulation amount Qm of the particulate matter and ash (S12), the forced regeneration of the filter is performed (S20); and when the estimated value (A value) reaches the prescribed value A1 again before the elapsed time since the completion of the forced regeneration of the filter reaches a prescribed time period T1 (S12, S14), it is judged that the amount of the ash accumulated in the filter is equal to or larger than a regulation amount (cleaning is required).

The invention discloses an air conditioner. The air conditioner controls capacity of an outdoor heat exhanger unit and is not equipped with a switch valve with high pressure loss, preventing a refrigerant from accummulating in the outdoor heat exchanger and keeping reliability of a compressor or refrigeration cycle. The air conditioner comprises a first expansion valve on a liquid pipeline of a first outdoor heat exchanger; a second expansion valve on a liquid pipeline of a second outdoor heat exchanger; a first connecting pipeline that enables a sunction pipeline to be connected to a port of a first four-way valve and is connected with the sunction port of the compressor and the outdoor heat exhanger unit; a second connecting pipeline that enables a sunction pipeline to be connected to a port of a second four-way valve; and a check valve that is disposed on the second connecting pipeline to only allow the refrigerant to flow from the second four-way valve to the sunction pipeline.

The invention relates to the technical field of air conditioners, in particular to a method and device for adjusting the working frequency of a compressor and an air conditioner. The method comprisesthe steps of obtaining the outdoor environment temperature of an outdoor unit containing a compressor, if the outdoor environment temperature is not less than a temperature threshold value and the number of indoor units, in a working state, connected with the same outdoor unit is increased, calculating the target working frequency of the compressor according to the outdoor environment temperatureand the total load of the indoor units in the working state, and adjusting the current working frequency of the compressor according to the calculated target working frequency so as to avoid the problem of protection shutdown of the compressor caused by excessive exhaust pressure when more indoor units are started.

Provided is a miller cycle engine in which the thermal efficiency is improved by increasing boost pressure, while the reliability of mechanical strength and thermal load of the engine body is secured by maintaining a maximum in-cylinder pressure. The mirror cycle engine includes an intake valve variable unit (36) for controlling timing to open or close an intake valve (14), a steam. turbine (28) serving as a boost pressure adding device which adds an additional boost pressure to the boost pressure increased by a turbocharger (20) so as to increase only the boost pressure, or so as to increase the boost pressure by the additional boost pressure that is larger than increase in exhaust pressure, and a valve closing timing control unit (34) which advances more the timing to close the intake valve (14) as the additional boost pressure added by the steam turbine (28) becomes higher so as to maintain the boost pressure at substantially the same level as a maximum in-cylinder pressure before adding the additional boost pressure.

The invention provides a medium-pressure and high-pressure air compressor set. According to the medium-pressure and high-pressure air compressor set, air in the natural environment can be pressurized through a screw compression system and a piston compression system; the discharge capacity is large, the discharge pressure is high, the energy consumption is small, and the compression efficiency is high. The medium-pressure and high-pressure air compressor set comprises the screw compression system, the piston compression system, a filter, a refrigerated air dryer, a buffer tank and a blow down tank. The screw compression system comprises a two-level screw compressor; the air in the natural environment is pressurized to 1.5-2.5 Mpa; after being dehydrated, degreased and cooled, the screw-compressed air passes through the filter and the refrigerated air dryer and then enters the piston compression system through the buffer tank. The piston compression system comprises a two-level piston compressor or four-level piston compressor, and the air pressurized through the screw compression system is pressurized to over 6.3 Mpa or over 32 Mpa. The blow down tank is connected with the buffer tank, the filter and the refrigerated air dryer and used for the collecting function of the buffer tank, the filter and the refrigerated air dryer.

The multistage dry vacuum pump is disclosed, in which it is possible to prevent a pump from being adhesively stuck, which problem occurs due to a difference in thermal expansions between a cylinder body and a rotor, by making thermal expansion conditions between a cylinder body and a rotor of a pump similar by concurrently cooling the cylinder body and the rotor of the pump, and a high vacuum degree can be obtained by obtaining an optimum gap design in the rotor and the cylinder, respectively, for thereby making the size of the pump smaller and significantly reducing the maintenance cost of the pump facilities. The gas passage for transferring gas compressed by each cylinder is provided at each cylinder body in a shape of surrounding an outer side of each cylinder, and a cooling water jacket for circulating cooling water is provided close to an outer side of the gas passage, and a communication passage is formed at a gas passage contacting with the cooling water jacket and is connected with an exhaust pace of the cylinder.

The invention discloses a low-temperature refrigeration control method, device and system for an air conditioner unit. The method comprises the following steps: when the air conditioner unit is started to enter a running state of low-temperature refrigeration, detecting the opening and closing state of an exhaust pressure switch of the unit; if the exhaust pressure switch is in a closing state, reducing the wind speed gear of an outdoor fan of the unit according to a first preset rule until the exhaust pressure switch is turned off or the wind speed gear is reduced to the lowest gear. The method solves the technical problems that when the air conditioner unit in the prior art is in the running state of low-temperature refrigeration, the unit has the phenomenon of running with liquid as the exhaust pressure of the unit is low, and the running reliability of the unit is low.

The invention relates to a gas generating device, in particular to a vertical carbon-dioxide generator for a greenhouse with the purpose of solving the technical difficulty that carbon dioxide generators in the same kind are high in energy loss. The vertical carbon-dioxide generator comprises a thermal decomposition reactor and an ammonia absorber. The top end of the thermal decomposition reactor is provided with a feeding sealing cover. The bottom of the thermal decomposition reactor is provided with a heater. The side wall of the thermal decomposition reactor is provided with a waste discharge valve and a mixed gas pipe. The mixed gas pipe and the ammonia absorber are communicated. The side wall of the ammonia absorber is provided with a liquid level pipe, a water-adding valve, an ammonia water discharge valve and a carbon-dioxide exhaust pipe. The interior of the ammonia absorber is provided with a millipore filter communicated with the mixed gas pipe.The vertical carbon-dioxide generator for the greenhouse has following beneficial effects: by heating ammonium bicarbonate, carbon dioxide is produced and gas is produced at high speed; by means of a pressure adjusting system, uniform gas distribution at long distance can be achieved; the problem that a technical product in the same kind may have energy dissipation due to the need of air pump pressurization is solved; the vertical carbon-dioxide generator is adapted for greenhouses with all specifications; and carbon dioxide can be supplemented to multiple greenhouses in a unified way at the same time.

The invention discloses a turbocharging system with continuously adjustable volume of an exhaust pipe, belonging to the technical field of internal combustion engines. The turbocharging system comprises a cylinder, the exhaust pipe, a turbine, a volume cavity, a sleeve body, a baffle and an elastic part, wherein an opened end of the volume cavity is connected with the side wall surface of the exhaust pipe, and the other opened end of the volume cavity extends into an opened end of the sleeve body; the baffle is arranged in the volume cavity; the elastic part is arranged between the baffle andthe rear wall of the sleeve body; when an engine is in a low-speed working condition, the rear wall of the sleeve body moves towards the direction close to the baffle, the volume of the exhaust pipe is relatively smaller, the pulse energy can be fully utilized, the gas inlet pressure of the engine is higher and the overall performance of the engine is better; and when the engine is in a high-speed working condition, the rear wall of the sleeve body moves towards the direction far away from the baffle, the volume of the exhaust pipe is relatively larger, the pump gas loss is less, and the overall performance of the engine is better. The turbocharging system is reasonable in design and simple in structure, and one of the turbocharging system provided by the turbine is applicable to the turbine inlet.

The embodiment of the invention provides an engine exhaust temperature control system and method, and belongs to the field of engines. The exhaust pressure of an engine is controlled through an exhaust throttling valve (ETV) (1), in the working period of the engine, when the exhaust temperature of the engine is lower than the working temperature, the ETV (1) is controlled to reduce the opening degree, and the exhaust pressure of the engine is increased; under the conditions that a particle supplementing and collecting system of the engine accumulates a certain carbon load and needs regeneration and the exhaust temperature of the engine is lower than the regeneration exhaust temperature, the ETV (1) is controlled to reduce the opening degree, and the exhaust pressure of the engine is increased; and the exhaust pressure of the engine is increased through the ETV (1) so as to raise the exhaust temperature, and compared with the prior art where the requirements of the fuel economy regulations and the vehicle emission regulations may not be met by increasing the rear fuel injection quantity, the engine exhaust temperature control system and method have the higher environmental protection property and economical efficiency.

An air conditioning apparatus includes a casing having an inlet and an outlet, an airflow import device, a nozzle, two valves disposed at two ends of the nozzle, a vacuum pump connected through the nozzle, a connecting device, a heater, a humidifier, and an airflow export device. The airflow import and export devices are disposed at positions near the inlet and the outlet inside the casing. The nozzle includes an intake portion, a throat, and an exhaust portion connected sequentially and coaxially. A cross-sectional area of the intake portion decreases gradually from one end away from the throat to the other end close to the throat. A cross-sectional area of the throat is smaller than that of the exhaust portion. The connecting device is connected to the intake portion and the exhaust portion. The heater and the humidifier are disposed between the nozzle and the outlet.

The invention discloses a thermal circulation process of a gas turbine based on pure oxygen or oxygen-enriched combustion, which comprises the following steps: compressing liquid fuel or gas; compressing oxygen gas or oxygen-enriched air; carrying out mixed combustion of the liquid fuel or the gas and the oxygen gas or the oxygen-enriched air; spraying water for controlling temperature; expanding high temperature and high pressure flue gas after combustion in the gas turbine for applying work; cooling most of water vapor in tail gas with circulating water in a condenser, wherein the condensed water circulates to a combustion chamber to be used for spraying water for controlling temperature, and the non-condensable gas is extracted by a vacuum pump; or exhausting gas under normal pressure without the use of the vacuum pump. By adopting direct combustion of the pure oxygen or the oxygen-enriched air and adopting the water spraying mode to replace excess air for controlling temperature, the air inflow is small, the amount of compression of a compressor is small, the restriction of the optimal pressure gas ratio is eliminated, the circulating intake pressure is improved, the non-condensable gas in the tail gas is little, and the exhaust pressure can be reduced through vacuum condensation. Because the process has high circulating intake pressure and low exhaust pressure, the expansion ratio of the gas turbine is improved, thereby improving the generating efficiency.

The invention discloses a scroll compressor, which comprises a fixed scroll component and a movable scroll component, wherein a spraying passage and a spraying hole are arranged on the fixed scroll component, the spraying passage is an annular passage, the spraying hole is arranged in the annular passage, a floating ring, an O-shaped ring A and an O-shaped ring B are arranged in the annular passage, the position of the floating ring is limited by a high-pressure and low-pressure isolation component, and the floating ring can move in the annular passage and can be fixed by a fastening element. The invention is characterized in that the spraying passage and the spraying hole are formed on the fixed scroll component, the mass of the refrigerating agents in a cavity is continuously increased because of the spraying effect, the exhaust temperature of the compressor is obviously reduced because of the cooling effect of the refrigerating agents, and the compressor can work normally. The sprayed refrigerating agents improve the refrigerating quantity, and improve the capability of the compressor, and at the same time, because the capability improvement is greater than the power improvement, the efficiency of the compressor is obviously improved.

In a case where a vehicle is in a steady running state or in a slow acceleration state, opening of an electric waste gate valve is set so that an actual air flow rate becomes minimum. Then, a feedback control is applied to opening of an electronically controlled throttle valve so that an actual amount of intake air generates output torque of an engine corresponding to an engine load. When the electronically controlled throttle valve is fully opened, while opening of the electronically controlled throttle valve is maintained, the feedback control is applied to opening of the electric waste gate valve so that output torque of the engine corresponds to an engine load, or an actual amount of intake air becomes a target amount of the intake air.