35results about How to "Increase exhaust flow" patented technology

An engine system with a turbocharger is provided. The system may include an exhaust manifold having plural independent exhaust passages, each of the exhaust passages being connected to an exhaust port of a corresponding engine cylinder. The system may further include a collective part formed by gathering said independent exhaust passages in said exhaust manifold or on a downstream side of said exhaust manifold. The system may further include an exhaust turbocharger connected to a downstream side of said collective part. The system may further include a variable exhaust valve for changing each passage cross-sectional area of said independent exhaust passage at an upstream side of said collective part. The system may further include a controller for controlling said variable exhaust valve, wherein said controller is configured to perform independent exhaust throttle control for reducing a passage cross-sectional area of at least one of said independent exhaust passages.

Systems and methods for using compressed intake air that is free of soot particles to clean the EGR cooler of an internal combustion engine having a turbocharger are provided herein. One example system includes an EGR valve for selectively diverting a portion of exhaust gas through an EGR conduit to an intake side of the internal combustion engine, an EGR cooler disposed in the EGR conduit, the EGR cooler having an exhaust side and an intake side, and a compressed intake air delivery system including a compressed air conduit, the compressed intake air delivery system being configured to selectively divert a portion of compressed intake air compressed by the turbocharger through the EGR cooler to remove soot particles deposited in the EGR cooler.

A turbo-molecular pump comprises: a rotor; stationary blades; a stator; a plurality of spacers; a heater disposed on the base; a temperature sensor for detecting a temperature of the stator; and a temperature regulation section for on/off controlling the heater based on a temperature detected by the temperature sensor to regulate the temperature of the stator so as to be a reaction product accumulation prevention temperature. At least one spacer arranged on a base side of the plurality of spacers is cooled by coolant, and the turbo-molecular pump further comprises a heat insulation member disposed between the base and the spacer arranged on the base.

A detection apparatus includes a particulate matter (PM) detection unit, a temperature detection unit, and a correction unit. The PM detection unit includes an insulator, a pair of electrodes, and a detector. The insulator is disposed in an exhaust path of an internal combustion engine through which an exhaust gas flows. The pair of electrodes are arranged in contact with at least a part of the insulator. The detector detects a PM detection value which is a value correlated to an amount of PM in the exhaust gas. The temperature detection unit detects at least one of an exhaust temperature of the exhaust gas passing through the PM detection unit and an insulator temperature of the insulator. The correction unit corrects the PM detection value detected by the PM detection unit based on at least one of the exhaust temperature and the insulator temperature.

The present invention relates generally or preferably to pulsed hypersonic compression waves and more particularly to shaped charge devices using pulsed hypersonic compression waves to create thrust, two-cycle internal and external combustion engines, rotary machines and more specifically to internal and external rotary combustion engines, fluid compressors, vacuum pumps, and drive turbines for expandable gases or pressurized fluid and water, as well as hydrogen.

Exhaust aftertreatment systems and methods are described for reducing emissions output therefrom. In one example, an exhaust gas aftertreatment system comprises a first catalyst downstream of a branchpoint in a first exhaust pathway, a second catalyst downstream of the branchpoint in a second exhaust pathway, an electrical heater positioned upstream of the branchpoint for heating the exhaust flow, a control unit for adjusting an exhaust heating current of the electrical heater, and a valve for adjusting a distribution of exhaust flow to the first and second catalyst, the control unit including instructions to adjust the valve responsive to a substrate temperature within one or more of the first and second catalysts. In this way, an exhaust system with increased efficiency across a range of operating temperatures is realized that reduces emissions and energy expended during usage.

A DPF system including a Venturi exhaust passage device, in which a temperature and a pressure in a high pressure passage are measured, together with a difference of pressures in the high pressure passage and a low pressure passage, while a pressure drop across a DPF is monitored. A PM amount and an exhaust flow rate, which are key parameters in DPF control, can be calculated with the measured values. With the Venturi exhaust passage device, a two-stage bootstrapping heating device with two DOCs and an electrical heater can be used to heat exhaust gas at a temperature lower than a light-off temperature, while a flow-back passage fluidly connected to an outlet of the DPF can be used for increasing exhaust flow-rate and making PM distribution in the DPF more uniform. These technologies decrease risks of thermal runaways, and enable a DPF system controlled without using engine operating parameters.

An exhaust control device for a vehicle engine includes an exhaust control valve capable of changing the opening area of an exhaust passage. The exhaust control valve is disposed in exhaust passage forming means so as to be able to change a bent-internal side partial passage sectional area of the passage sectional area of an exhaust passage. Specifically the exhaust control valve is disposed at a bent portion of the exhaust passage that is closest to an exhaust valve port. With this configuration, the exhaust flow rate can be controlled satisfactorily.

Methods and systems are provided for a particulate matter (PM) sensor assembly positioned downstream of a diesel particulate filter in an exhaust system. In one example, a PM sensor assembly may include a bent tube having a first, upstream end coupled to an exhaust passage, and a second outwardly flared end at a downstream end of the assembly. In this way, the second end of the bent tube may form a venturi that serves to block larger particulates from entering the assembly, and additionally serves to increase exhaust flow into the sensor assembly.

The invention belongs to the technical field of power generation engineering and control thereof, and particularly relates to a system and method for controlling a high back pressure steam feed pump of a large generator set. The system comprises a high back pressure steam feed pump set, an electric feed pump set, a condenser, a low-pressure heater, a steam header, a deaerator, a condensate pump, avacuum pump, a monitoring system, a pressure measuring device, a temperature measuring device, a flow measuring device, a pipeline and a valve. According to the system and method for controlling thehigh back pressure steam feed pump of the the large generator set, the number of the equipment is reduced, the operation efficiency of the equipment is improved, and the working capacity of the exhaust steam of a steam turbine driving the steam feed pump and the condensation of the exhaust steam are fully utilized to release the latent heat of vaporization, so that the energy utilization efficiency and the flexibility of the equipment control are improved.

A marine muffler comprises an elongate cylindrical housing having an inlet and an outlet and defining an internal volume partitioned, by an angularly disposed internal baffle, into a lower chamber in communication with the inlet and an upper chamber in communication with the outlet. A vertically disposed duct is insertably secured to the baffle to allow exhaust gas and exhaust cooling water to flow from the lower inlet chamber to upper outlet chamber. The exhaust duct may preferably be further adapted with internal structure forming a plurality of individual flow conduits or passages. The duct is preferably positioned such that a plurality of flow passage inlets are positioned in proximity to the lower cylindrical housing wall, with flow passage outlets positioned in proximity to the upper housing wall. The lower duct wall may further be adapted with sidewall apertures for improving exhaust flow dynamics therethrough.

The invention relates to a turbine wheel of an exhaust gas turbocharger which may include a body composed of a TiAl alloy via at a metal injection moulding (MIM), selective laser melting (SIM) or electron beam melting (EBM). The body may have a quotient Q of a diameter dS defined by each of the outlet blade tips to a diameter dN defined by each of the outlet blade roots corresponding to the following relationship: Q=dS/dN>3.85 in this condition.

The invention discloses an engine and a supercharging system thereof. The supercharging system of the engine comprises an air inlet pipeline, an exhaust pipeline, a bypass pipeline and a bypass valve,wherein the air inlet pipeline is connected with an air compressor and an engine body; the exhaust pipeline is connected with the engine body and a turbine; an air inlet end of the bypass pipeline isconnected with the air inlet pipeline, and an air outlet end is connected with the exhaust pipeline; and the bypass valve is arranged on the bypass pipeline and controls the ventilation capacity of the bypass pipeline. According to the engine and the supercharging system thereof, the bypass valve is properly opened at a certain opening according to requirements under the appropriate working condition, supercharged intake air is bypassed to an exhaust side under the action of differential pressure, and the flow and energy of exhausted air are increased after being bypassed, so that the outputpower of the turbine is increased; and due to increase of surge margin of the engine and increase of the air-fuel ratio, the fuel injection quantity can be increased by the engine to obtain higher torque output, the surge problem of a supercharger cannot be caused, and the reliability of the supercharger is improved.

The invention provides a diesel engine dynamic air compensation and heat management system which comprises a supercharger and an engine, an intercooler and a DACS valve are sequentially arranged on a pipeline between an air outlet of the supercharger and an air inlet of the engine, and air flowing out of the air outlet of the supercharger sequentially passes through the intercooler and the DACS valve to enter the air inlet of the engine; one end of the bypass air guide pipe is communicated with a pipeline between an air outlet of the supercharger and a port, close to the supercharger, of the intercooler; the other end of the bypass gas guide pipe is communicated with the DACS valve; a bypass throttle valve is arranged at a port, communicated with the DACS valve, of the bypass air guide pipe; a temperature sensor is arranged at an air inlet of the engine and used for detecting the air inlet temperature of the air inlet of the engine in real time. The system further comprises an engine controller and a DACS controller. Adjustment of the air inlet temperature of the engine is effectively achieved, so that the exhaust temperature is increased, and tail gas emission is improved.