摘要:
In an exhaust gas pipe, a first fluid flows in a flow direction in the pipe, and a second fluid is injected inside the pipe by a nozzle, from an injection inlet arranged in the pipe wall, according to an injection direction. A mixing device fastened inside the pipe upstream from the injection inlet creates turbulence that helps the mixing of the fluids. The mixing device has a first portion located on the injection inlet side of the pipe and a second portion located opposite the injection inlet side of the pipe, the portions being designed so that the fluid velocity is higher downstream from the mixing device second portion than downstream from the mixing device first portion. An aqueous solution of urea can be injected inside an exhaust pipe of a diesel engine.
摘要:
A process is provided for regenerating an exhaust gas after-treatment device in an exhaust line of an internal combustion engine arrangement, the exhaust line including a particle filter. The process includes identifying when soot loading of the particle filter exceeds a predetermined level. After that, temperature of exhaust gases at the particle filter is maintained within a first temperature range until at least one of a predetermined period of time has lapsed or a determination is made that soot loading of the particle filter is below the predetermined level. After that, the temperature of the exhaust gases at the particle filter is increased to within a second temperature range above the first temperature range. An internal combustion engine arrangement is also disclosed.
摘要:
A valve actuation mechanism includes a rocker adapted for opening a cylinder valve, via an activation piston movable in a piston chamber of the rocker under action of a fluid pressure raise in the piston chamber, from a first position in which an engine operating function is deactivated to a second position, in which the engine operating function is performed, the rocker including a controlled blocking valve, wherein the control of the blocking, valve between its open state and its blocking state is performed by action of a force exerted by the fluid pressure in the piston chamber on a valve member of the blocking valve which is exposed to the fluid pressure in the piston chamber.
摘要:
An internal combustion engine includes a plurality of cylinders, an air intake line and an exhaust line collecting exhaust gas. The engine also includes an EGR line for rerouting a part of the exhaust gas from the exhaust line towards the air intake line and at least a first turbocharger comprising a first turbine driven by the exhaust gas flowing towards the atmosphere, linked to a first compressor located on the air intake line. The engine further includes a variable geometry EGR turbine located on the EGR line, driven by the EGR gas flowing in the EGR line. Thus, thanks to the pressure reduction occurring in the turbine, the EGR gas temperature is lowered, and less cooling power from the engine cooling system is required to cool down the EGR.
摘要:
A valve actuation mechanism includes a rocker adapted for opening a cylinder valve, via an activation piston movable in a piston chamber of the rocker under action of a fluid pressure raise in the piston chamber, from a first position in which an engine operating function is deactivated to a second position, in which the engine operating function is performed, the rocker including a controlled blocking valve, wherein the control of the blocking, valve between its open state and its blocking state is performed by action of a force exerted by the fluid pressure in the piston chamber on a valve member of the blocking valve which is exposed to the fluid pressure in the piston chamber.
摘要:
A power steering system includes a first steering mechanism designed to control the steering of at least one of the wheels of a steered axle and includes a mechanical transmission of the movement from a steering wheel of the vehicle to the wheel, a first actuator controlled by a parameter related to the steering wheel movement and capable of providing a steering assistance effort to the wheel. The power steering system further includes a second steering mechanism which includes a second actuator capable of providing a steering assistance effort to at least one of the wheels of the same axle, the second actuator having a housing which is secured to the axle, a first and a second piston rods able to slide through the housing and extending, on opposite sides, beyond the housing, with the piston rods being substantially parallel to the axle.
摘要:
In an exhaust gas pipe, a first fluid flows in a flow direction in the pipe, and a second fluid is injected inside the pipe by a nozzle, from an injection inlet arranged in the pipe wall, according to an injection direction. A mixing device fastened inside the pipe upstream from the injection inlet creates turbulence that helps the mixing of the fluids. The mixing device has a first portion located on the injection inlet side of the pipe and a second portion located opposite the injection inlet side of the pipe, the portions being designed so that the fluid velocity is higher downstream from the mixing device second portion than downstream from the mixing device first portion. An aqueous solution of urea can be injected inside an exhaust pipe of a diesel engine.
摘要:
A gas flow regulating device for cleaning a particulate filter is configured to be arranged in connection to the filter at a side thereof in a through-flow of a gas to be used for cleaning the filter. The device is a standalone unit configured to be removably installed in connection with a cleaning process, wherein the device includes a frame defining a gas flow passage and a gas flow regulating element arranged inside the frame, wherein the gas flow regulating element is provided with at least one opening for gas through-flow and a blocking part capable of blocking a portion of a gas through-flow area of the filter such as to force the gas to flow through the at least one opening, wherein the gas flow regulating element is movably arranged between at least two different positions, and wherein the at least one opening covers different portions of the gas through-flow area in the different positions. An arrangement for cleaning a particulate filter including such a device, and a method for cleaning a particulate filter using such a device are also provided.
摘要:
A process is provided for regenerating an exhaust gas after-treatment device in an exhaust line of an internal combustion engine arrangement, the exhaust line including a particle filter. The process includes identifying when soot loading of the particle filter exceeds a predetermined level. After that, temperature of exhaust gases at the particle filter is maintained within a first temperature range until at least one of a predetermined period of time has lapsed or a determination is made that soot loading of the particle filter is below the predetermined level. After that, the temperature of the exhaust gases at the particle filter is increased to within a second temperature range above the first temperature range. An internal combustion engine arrangement is also disclosed.
摘要:
An internal combustion engine includes a plurality of cylinders, an air intake line and an exhaust line collecting exhaust gas. The engine also includes an EGR line for rerouting a part of the exhaust gas from the exhaust line towards the air intake line and at least a first turbocharger comprising a first turbine driven by the exhaust gas flowing towards the atmosphere, linked to a first compressor located on the air intake line. The engine further includes a variable geometry EGR turbine located on the EGR line, driven by the EGR gas flowing in the EGR line. Thus, thanks to the pressure reduction occurring in the turbine, the EGR gas temperature is lowered, and less cooling power from the engine cooling system is required to cool down the EGR.