The dual pass intercooled supercharger includes a supercharger and intercooler. The system is configured such that air leaving the supercharger traverses the intercooler from one side to an opposing side two or more times.

Methods and systems are provided for a cooling arrangement of a hybrid vehicle. In one example, a system comprises a high-temperature coolant circuit with a pressure line shaped to actuate an actuator of a pressure-actuated valve arranged in a low-temperature coolant circuit.

Split-cycle internal combustion engine comprising at least one compressor cylinder and at least one combustion cylinder each associated with a relating piston and a relating head, equipped with at least one admission valve and one exhaust valve of the combustor piston, first controller of the at least one admission valve and second controller of the at least one exhaust valve, the piston of the combustion cylinder is associated with a crankshaft by a crank mechanism and when the engine is in a firing condition the second controller is arranged to cause a first opening event of the at least one exhaust valve in a first predetermined angular position of the crankshaft and when the engine is in the engine braking condition the second controller is arranged to reposition the first event in a second predetermined angular position out of phase by 180 degrees with respect to the first angular position.

Methods and systems are provided for variable thermal capacity charge air cooler (VTC-CAC). In one example, the VTC-CAC includes a plurality of cooling channels and an integrated bypass that diverts air around the cooling channels. Division of boosted intake air between the cooling channels and the bypass is regulated by a positioning of dual-gate mechanism that is adjusted in response to manifold charge temperature.

A method of operating a forced induction gaseous-fueled engine includes mixing gaseous-fuel and engine intake air to form a mixture at a fuel mixer. The method includes delivering the mixture to an intake manifold by at least partially bypassing a charge air cooler.

Methods and systems are provided for a tempering circuit. A system comprises where the tempering circuit is fluidly coupled to each of an engine cooling circuit, an EGR cooler, and an EGR valve. The tempering circuit comprising a plurality of control valves for selectively adjusting tempering medium flow to various portions of the tempering circuit.

An engine exhaust gas circuit includes a primary circuit in fluid communication with an intake of an engine and an outlet of the engine. The primary circuit conveys a gas from the outlet of the engine to the inlet of the engine. The primary circuit including a valve body having a rotary flap rotatably disposed in the valve body. A bypass circuit extends from a branch point intermediate the outlet of the engine and the valve body to the valve body.

Torque fluctuations caused by misfire and abnormal combustion are prevented appropriately at the time of switching from SI to HCCI, and exhaust of NOx is restricted at the time of switching.

Provided is a control apparatus for an internal combustion engine performing a plurality of combustion modes each having a different air-fuel ratio and compression end temperature in a cylinder 7 from each other. In the middle of switching from a first combustion mode to a second combustion mode, an intermediate combustion mode in which the compression end temperature is increased while keeping a different air-fuel ratio from the air-fuel ratio of the first combustion mode and the air-fuel ratio of the second combustion mode is performed. Accordingly, at the time of switching between an operation mode performing SI and an operation mode performing HCCI, a temperature in the cylinder 7 and an air-fuel ratio are controlled appropriately, torque fluctuations caused by misfire and abnormal combustion can be prevented appropriately, and exhaust of NOx can be restricted.

A charge air cooler, e.g., as used with a supercharger having meshing rotors in sealing contact with a housing, the housing having an inlet port to admit air into the meshing rotors and the housing having an outlet port to expel air from the meshing rotors, the charge air cooler having an inlet-side core for transmitting the flow of pressurized air, and an outlet-side core receiving the flow of pressurized air transmitted from the inlet-side core and further transmitting the flow of pressurized air, each core having coolant conduits and fins joined to the coolant conduits for contact with the flow of pressurized air, the fins being arranged with a predetermined density, wherein the inlet-side core fin density is lower than the outlet-side core fin density, whereby the inlet-side core presents less resistance to the flow of pressurized air than the outlet-side core and the outlet-side core presents greater surface area for heat conductance from the flow of pressurized air than the inlet-side core. Charge air coolers with this configuration provide improved pressure and temperature characteristics in a supercharger's flow of pressurized air to an engine.

Nonwoven abrasive articles comprise a nonwoven abrasive member having an overlayer composition comprising a fatty acid metal salt disposed thereon adjacent to a working surface. The nonwoven abrasive member comprises abrasive particles adhered to a fiber web by a binder. The abrasive particles may be exposed and/or the nonwoven abrasive member may have suitable frictional properties. Methods of making the same are also disclosed.