An aftertreatment system comprises a first SCR system, a second SCR system positioned downstream of the SCR system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first SCR system and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to instruct the reductant insertion assembly to asynchronously insert the reductant into the first SCR system and the second SCR system.

A turbine impeller includes: a hub portion coupled to an end of a rotational shaft; a plurality of main blades disposed at intervals on a peripheral surface of the hub portion; and a short blade disposed between two adjacent main blades among the plurality of main blades. An inter-blade flow channel is formed between the two adjacent main blades so that a fluid flows through the inter-blade flow channel from an outer side toward an inner side of the turbine impeller in a radial direction. In a meridional plane, a hub-side end of a leading edge of the short blade is disposed on an inner side, in the radial direction, of a hub-side end of a leading edge of the main blade.

Provided is a diaphragm type actuator that drives an operation rod in an axial direction of the operation rod, including: a diaphragm which is connected to the operation rod; a low pressure chamber which is adjacent to one end side of the diaphragm in the axial direction; a high pressure chamber which is adjacent to the other end side of the diaphragm in the axial direction; a return spring which is provided in the low pressure chamber and urges the diaphragm toward the high pressure chamber; and a retainer which is provided on a surface near the high pressure chamber in the diaphragm. An elastic member is disposed inside the high pressure chamber and the elastic member is disposed between a retainer and a wall surface facing the retainer in the axial direction.

A fuel reforming system for a vehicle includes an Exhaust Gas Recirculation (EGR) line for recirculating a part of exhaust gas of an engine towards an intake side, a fuel reformer provided on the EGR line, the fuel reformer reforming fuel that is to be supplied to the engine, and the fuel reformer supplying the reformed fuel to the engine via the EGR line, an EGR valve provided downstream of the fuel reformer, and a pressure control valve provided in the fuel reformer for controlling an inner pressure of the fuel reformer.

A reductant insertion system for an after treatment system configured to decompose constituents of an exhaust gas, includes: a dry reductant tank configured to contain a dry reductant; a reductant delivery line configured to operatively couple the dry reductant tank to the after treatment system for delivery of the dry reductant to the after treatment system; and a pressurized gas source configured to communicate the dry reductant to the after treatment system through the reductant delivery line using pressurized gas.

In a catalyst warming-up control, a first time injection is performed by an injector in an intake stroke. A second time injection is performed with an amount smaller than the first time injection in an expansion stroke after a compression top dead center. In the catalyst warming-up control, an interval from the start of the ignition period of an spark plug to the completion of the second time injection is controlled by the ECU so that the initial flame generated from an air-fuel mixture containing the fuel spray injected by the first time injection is brought into contact with the fuel spray injected by the second time injection.

An electro-catalytic honeycomb for exhaust emissions control and manufacturing method thereof firstly provides a honeycomb structural body comprising a backbone, a solid-oxide layer, a cathode layer and an inner annular layer. The backbone is provided with an anode and gas channels. The anode is provided with an outer surface and an inner surface inside the gas channels. The solid-oxide layer is formed on the inner surface. The cathode layer is formed on the solid-oxide layer. The inner annular layer is allowed for encapsulating an annular end edge of the outer surface. Subsequently, a sealing body is provided over the inner annular layer. Then, the anode is reduced to a reducing environment. Finally, an encapsulation is provided over the honeycomb structural body to seal the outer surface and a sealing membrane of the sealing body is removed for passing a lean-burn exhaust through the gas channels.

An oil separator is designed for an internal combustion engine with a camshaft system, via which oil separator a medium containing oil-particle-enriched blow-by gases, is influenced to the effect that the oil particles and the blow-by gases are separated and supplied to an oil circuit or to an inlet system of the internal combustion engine. The oil particles are separated from the blow-by gases by rotation of the camshaft system. In order to optimize this oil separator, the camshaft system has at least one camshaft on which a centrifugal blade device acting as the oil separator is effective. The centrifugal blade device conveys the oil particles of the medium against housing walls which are adjacent relative to the camshaft and lead to the oil circuit, with the blow-by gases freed from oil particles being conducted into the inlet system by the pressure conditions prevailing in a crankcase of the internal combustion engine.

A filtration assembly for removing particulate matter from exhaust gas produced by an engine, including: a first filter; a second filter positioned downstream of the first filter; and a valve including: a first ring defining a plurality of first openings, and a second ring defining a plurality of second openings, the second ring abutting the first ring. The valve is moveable between a closed position in which the plurality of first openings are misaligned with the plurality of second openings to prevent a fluid from flowing through the plurality of first and second openings, and an open position in which the second ring is rotated relative to the first ring such that the plurality of first openings are aligned with the plurality of second openings allowing the fluid to flow therethrough. A first end of the valve is positioned at an outlet of the first filter, and a second end of the valve is positioned at an inlet of the second filter. In the closed position of the valve, substantially all of the exhaust gas flows through the second filter, and in the open position of the valve, at least a portion of the exhaust gas flows through the valve and bypasses the second filter.

A rotary engine where the rotor cavity has a peripheral inner surface having a peritrochoid configuration defined by a first eccentricity and the rotor has a peripheral outer surface having a peritrochoid inner envelope configuration defined by a second eccentricity larger than the first eccentricity. Also, a rotary engine where the rotor cavity has a peripheral inner surface having a peritrochoid configuration defined by an eccentricity, and a rotor with a peripheral outer surface between adjacent ones of the apex portions being inwardly offset from a peritrochoid inner envelope configuration defined by the eccentricity. The engine may have an expansion ratio with a value of at most 8. The rotary engine may be part of a compound engine system.