78results about "Silencing apparatus" patented technology

A method for inspecting a honeycomb structured body of the present invention is a method for inspecting a honeycomb structured body comprising a pillar-shaped honeycomb fired body having a multitude of cells placed in parallel with one another in the longitudinal direction with a cell wall therebetween, the method comprising: measuring the shape of the honeycomb structured body in the longitudinal direction through preparing a contact measurement apparatus including a reference surface, a rail disposed perpendicularly to the reference surface, and a measurement probe including a contacting probe configured to move along the rail; contacting one end face of the honeycomb structured body with the reference surface; and moving the measurement probe in a direction nearing the reference surface to contact the contacting probe with the other end face of the honeycomb structured body.

A flow-through muffler includes a plurality of heat conducting walls, baffles, or partitions that together define a plurality of passages arranged to form acoustic waveguides, attenuators, and/or cancellation chambers, the walls, baffles, or partitions increasing a surface area exposed to the exhaust gases to facilitate extraction of heat while attenuating or canceling the resulting sound pressure waves. The muffler may have a cooling arrangement mounted thereon, and thermoelectric generator elements or other heat-powered device, such as a reformer, connected across the heat differential between the cooling arrangement and an exterior surface of the muffler housing that is in thermal contact with the heat conducting walls, bafflers, or partitions. In addition, the muffler may be made tuneable by providing a device for varying a length of one of the passages relative to another passage, and by including a sound cancellation chamber at an intersection of the passages. In addition, the internal surfaces of the muffler may be coated with a catalyst to provide a combination muffler and catalytic converter.

An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for operation of the engine and the after-treatment device to ensure cost-effective use of the engine and the after-treatment device while complying with exhaust emissions requirements. In particular, the engine controller receives the price of fuel consumed by the engine and the price of reductant used by the after-treatment device to determine the respective cost of operation. Specifically, the fuel is diesel fuel used in a diesel engine; the reductant is urea use in a urea-based Selective Catalytic Reduction (SCR) system; and the regulated exhaust emissions is nitrogen oxide (NOx) emissions. The engine operating parameters may include cooled exhaust gas recirculation airflow, fuel injection timing, fuel injection pressure, and air-to-fuel ratio. The SCR system operating parameters may include the volume of urea injected.

The composite sound-absorbing device of the present invention includes a perforated board having a number of first pores thereon, a back board and side boards, the perforated board, back board and side boards forming a closed cavity, wherein: at least one or more of the resonant cavities being located within the closed cavity; at least one or more of second pores being located on the resonant cavities; at least one of the second pores being connected with the closed cavity; the resonant cavity having a volume of V=10 mm³ −1×10¹⁰ mm³, having a thickness of 0.05 mm-10 mm, the second pores having an aperture of d′=0.05-100 mm, with a perforation rate σ′=0.01%-30%. The present invention is beneficial to improve the effect of sound-absorbing and expand the frequency band of sound-absorbing.

An engine air brake device for a 4-stroke reciprocating-piston internal combustion engine is provided and has at least one intake valve and two exhaust valves per cylinder. The exhaust train incorporates a throttling device actuatable for engine deceleration so that an exhaust back pressure builds up in the accumulated exhaust gas upstream of the throttling device and becomes effective in conjunction with an engine-internal braking device associated to only one of the two exhaust valves for each cylinder, the other exhaust valve being controlled conventionally. The engine-internal braking device comprises a control piston installed in the valve bridge and pressed in the direction of the exhaust valve from a control pressure chamber supplied with pressurized oil and possibly also by means of an additional control compression spring.

An electronic apparatus includes a drive for recording/reproducing a recording medium, and a sound absorbing member having a Helmholtz resonator for insulating sounds at a predetermined frequency among sounds generated by the drive.

The invention discloses a non-road diesel engine combustor DPF regeneration temperature control method. According to the method, control over the regeneration temperature of a non-road diesel engine combustor DPF is completed by combining feedforward control and PID feedback control. The method has the advantages that closed-loop control is stable and feedforward control is fast. The control precision of the regeneration temperature of a DPF catalytic converter is improved. Under various diesel engine working conditions, the error of the actual temperature of an inlet of the DPF catalytic converter and the DPF target regeneration temperature can be controlled within 25 DEG C. Accordingly, a DPF system can conduct reliable regeneration temperature management under various working conditions.

The attenuation system is applied to a compressor which comprises: a cylinder (2) having an end closed by a valve plate (4) provided with a discharge orifice (4a) and defining, with the cylinder (2), a compression chamber (6), a cylinder cover (5) being seated against the valve plate (4) and defining a discharge chamber (7), which communicates with the exterior of the compressor through a discharge tube (8). The attenuation system comprises: at least one intermediary chamber (10) defined in the interior of the discharge chamber (7), in order to receive, from the discharge orifice (4a), the whole discharge flow coming from the compression chamber (6); and at least one 4a connecting tube (20) mounted in the interior 4b of the discharge chamber (7), having a first end (21) open to the interior of the intermediary chamber (10) and a second end (22) open to the interior of the discharge chamber (7).

The present invention discloses a novel apparatus and way for controlling combustion dynamics in a premix combustion system. The apparatus comprises a hemispherical dome assembly with a plurality of dome dampers having a predetermined damper volume and air supply with the damper in fluid communication with the combustion chamber. The dome dampers are pressurized with a volume of air to dampen pressure waves received from the combustion chamber. One or more combustor frequencies can be targeted through use of the present invention.

A method for operating an internal combustion engine, in whose exhaust gas system an exhaust gas treatment device is positioned, a reagent, which is possibly mixed with compressed air, being introduced into the exhaust gas system upstream from the exhaust gas treatment device, and a device for performing the method. The reagent is brought to a predefined reagent setpoint pressure using a reagent pump and subsequently metered using a reagent dosing valve. The reagent pressure existing upstream from the reagent dosing valve is detected. In the framework of a diagnosis, a time curve of the reagent setpoint pressure is predefined. The reagent pressure detected during the diagnosis is compared to at least one predefined threshold value. If the threshold value is exceeded, an error signal is provided. The corresponding diagnosis of a compressed air path may be provided alternatively or additionally to the diagnosis of the reagent path.

A cooler block for an agricultural tractor comprising a cooler assembly mounted on a radiator and coupled to the radiator by upper and lower linkages. The cooler assembly can be moved between a first position in which the cooler assembly lies parallel to the radiator and a second position in which the cooler assembly is inclined relative to the radiator. The cooler assembly is pivotable about a pivot in the upper linkage that is itself movable relative to the radiator. The lower linkage allows the entire cooler assembly to rise and the pivot of the upper linkage to move away from the radiator as the cooler assembly is pivoted from the first to the second position. A detent is incorporated into one of the two linkages to retain the cooler assembly in the second position.

An exhaust gas treatment device comprises a casing and a tail gas treatment module located inside the casing, wherein the casing comprises a mixing cavity, a splitting cavity and a distributing cavity; the exhaust gas treatment device further comprises a conical mixer located inside the mixing cavity and a mixing pipe located in the splitting cavity, and the conical mixer comprises a plurality of conical swirl plates and a plurality of openings corresponding to the conical swirl plates. Therefore, on one hand, urea can be laid on the pipe wall of the mixing cavity so as to increase the evaporation area and dwelling time of the urea and improve the mixing effect; on the other hand, exhaust gas can flow more smoothly, the local pressure loss can be reduced, and the back pressure can be reduced.

Provided is a gasket capable of maintaining a high sealing property under a high temperature, in which a gasket basic substance and coverture are not sublimated or decomposed when the gasket is used under a high temperature above 500° C. The gasket for a high-temperature joint includes a gasket basic substance formed by filling a heat-resistant filler mainly composed of diatomaceous earth into gaps of a meshed metallic reinforcing member, and coverture made of a heat-resistant antifriction material mainly composed of a mixture of boron nitride and polytetrafluoroethylene resin for covering a surface of the gasket basic substance.

A urea solution apparatus for a vehicle may include a urea solution storage tank installed in a side of a lower part in a rear part of a car body, and a urea solution pipe configured to inject a urea solution into the urea solution storage tank, wherein the urea solution pipe is connected to the urea solution storage tank in such a way that a urea solution injection nozzle of the urea solution pipe is located in a space in which a fuel inlet hole is provided.

There is provided an air-fuel ratio sensor with which an improvement in the accuracy in detecting the air-fuel ratio of detection target gas and an improvement in the response characteristics can both be achieved. The sensor includes a sensor element that outputs an output signal indicative of the air-fuel ratio of a detection target gas, a pair of electrodes including a detection target gas side electrode to which the detection target gas is introduced and an atmosphere side electrode exposed to the atmosphere, which are arranged in such a way as to sandwich the sensor element, a diffusion-controlling layer that is disposed on the sensor element in such a way as to cover the detection target gas side electrode and introduces the detection target gas from an entrance portion through which the detection target gas flows in to the detection target gas side electrode, and a catalyst layer provided on a part of the entrance portion.

The invention provides a sound insulation material (10) capable of improving the sound insulation performance, which comprises a sound insulation board (20) throughout the whole surface, a sound-source perforation board (30) arranged closer to the sound source (2) than the sound insulation board (20) and equipped with through holes (31) for sound absorption and a radiation perforation board (40) at the opposite side of the sound source (2) separated by the sound insulation board (20) and equipped with a plurality of through holes (41) for lowering the radiation sound.The sound insulation board (20) has the shape of reciprocating between the two perforation boards (30, 40).A sound-source air layer (50) and a radiation air layer (60) are respectively formed between the sound-source perforation board (30) and the radiation perforation board (40).A plurality of sound-source joint parts (21) and a plurality of radiation joint parts (22) respectively bonded to the two perforation boards (30, 40) are alternately provided.

A decorative rotatable accessory includes one or more rotatable decorative elements mounted about a cylindrical vehicle component, such as an automobile exhaust, a motorcycle fork, a head lamp, handle bar, or the like. In one implementation, an assembly comprises an interface that is mounted to the vehicle component. A rotator, which is operably coupled to one or more decorative elements, is coupled to the interface component in such a way that the one or more decorative elements can rotate in response to a wind or air force. In particular, when an air force, such as wind or exhaust pushes against one or more of the decorative elements, or against one or more impeller blades coupled to the decorative elements, the decorative elements rotate, creating a decorative motion effect.

The invention discloses a method and device for evaluating the urea crystallization risk based on a steady-state working condition. According to the method for evaluating the urea crystallization risk based on the steady-state working condition, a urea crystallization risk coefficient eta is evaluated through three coefficients, including a quality coefficient eta m, a temperature coefficient eta t and an efficiency coefficient eta e. The urea crystallization risk coefficient is obtained through comprehensive calculation from the three aspects of quality, temperature and structure, the crystallization risk is quantified through a mathematical method, the urea crystallization threshold value can be obtained through calibration, the urea decomposition detailed mechanism is fused into the model, the chemical reaction path is expressed in the form of a mathematical equation, the influence of an SCR mixer on crystallization is quantified from the angle of SCR conversion efficiency, the urea crystallization risk coefficient is not a fixed formula and can be calibrated according to a bench steady-state test, and the method is deduced based on a urea crystallization basic principle and a mathematical formula and is high in reliability.

An internal combustion engine is provided in which the temperature of an exhaust gas gradually decreases from its upstream side to its downstream side, and the temperature of a working medium of a heat exchanger, which flows in the opposite direction to the exhaust gas, gradually increases from its upstream side to its downstream side. The temperature difference between the exhaust gas temperature and the working medium temperature is the smallest at the interface between a liquid phase region and a two-phase region of the working medium, and since a catalyst device is incorporated at the upstream side, relative to the flow of exhaust gas, of the vicinity of the position where the temperature difference is the smallest, it is therefore possible for the heat exchanger to utilize the heat generated by the catalyst device effectively. Since the catalyst device is disposed in the two-phase region of the working medium, in which the temperature is constant, and this constant temperature is a temperature at which the catalyst is active, the catalyst can exhibit a stable exhaust gas purification performance.

An emission reduction device which may be removably affixed to an engine's exhaust system. The device comprises a cylindrical carcass with a beveled opening in a diagonal line in its proximal part A bobbin is affixed in the distal portion of the carcass. A cylindrical-shaped fibrous blanket may be inserted in the carcass and the fibrous blanket may be wrapped in a wire mesh. A second fiber mesh formed into a cone may be removably inserted in the cylindrical-shaped fibrous blanket with the larger diameter of the cone positioned proximally.

An aging device of a catalytic converter of a vehicle simulates wear-and-tear of a catalytic converter under conditions that simulate to those of a real vehicle by injecting an oil additive or an engine oil mixture containing phosphor (P), zinc (Zn), and etc., into an engine.

The invention relates to a method pertaining to an SCR system for exhaust cleaning, whereby reducing agent is supplied to a feed device (230) which supplies it to a dosing unit (250) for batched supply of reducing agent by means of a valve arrangement (350, 360) at a consumption point in the SCR system. The method comprises the steps of - continuously determining (s410) the cumulative number of doses injected (N) by said dosing unit (250), - continuously comparing (s420, s430) said cumulative number of doses injected (N) with a predetermined numerical value (TH), and - delivering an indication (s440) when said cumulative number of doses injected (N) exceeds said predetermined numerical value (TH). The invention relates also to a computer programme product comprising programme code (P) for a computer (200; 210; 500) for implementing a method according to the invention. The invention relates also to an SCR system and a motor vehicle (100; 110) equipped with the SCR system.

The invention relates to a reductant supply system for a waste gas cleaning catalyst ( 1 ) of an internal combustion engine, particularly a motor vehicle, comprising a reductant tank ( 3 ) for the storage of reductants, at least one electrically heatable fluid duct ( 6, 8 ) for the conveyance of reductant from the reductant tank ( 3 ) to a waste gas cleaning catalyst ( 1 ), a pump ( 5 ) to pump the reductant via the fluid duct ( 6, 8 ) from the reductant tank ( 3 ) to the waste gas cleaning catalyst ( 1 ), and a plug-in connection ( 10, 11 ) for connecting sections of the fluid duct ( 6, 8 ) in a fluid-conveying manner and/or connecting the fluid duct in a fluid-conveying manner to a component of the reductant supply system, wherein the plug-in connection additionally forms an electric connection line ( 12, 13, 14 ); which in operation conveys an electrical heating current for heating of the fluid duct ( 6, 8 ). The invention relates also to a plug-in connection ( 10, 11 ) for connecting a heatable fluid duct section ( 8 a, 8 b) as well as a female connector ( 10 ) and a male connector ( 11 ) of such plug-in connection.

Disclosed is a particulate combustion catalyst in which a catalyst component supported by a carrier is composed of an alloy that comprises 85-20 at% of Ag and 15-80 at% of at least one noble metal that is selected from the group consisting of Pd, Pt and Au. The particulate combustion catalyst has excellent heat resistance, and is capable of oxidizing and removing soot at low temperatures. In addition, the particulate combustion catalyst is capable of oxidizing and removing soot at low temperatures regardless of the NOx concentration in an exhaust gas since an oxidation reaction proceeds even when there is oxygen only. Also disclosed are: a method for producing the particulate combustion catalyst; a particulate filter which is coated with the particulate combustion catalyst; a method for producing the particulate filter; and an exhaust gas purifying apparatus which comprises the particulate filter that is coated with the particulate combustion catalyst.