Methods and systems are provided for an air system. In one example, a system includes a boost device configured to be driven by exhaust air from a plurality of cylinder in order to compress ambient air. The compressed ambient air is delivered to a tank configured to store compressed gases.

A method for producing liquefied gases includes providing an internal combustion engine with at least one cylinder and an exhaust manifold, providing a flow circuit, which includes the cylinder and connects an air inlet to the exhaust manifold, conveying air along the flow circuit according to a flow direction from the air inlet towards the exhaust manifold, compressing the air along a portion of the flow circuit, and liquefying at least one gaseous component of the compressed air.

Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, fuel supplied to cylinders being reactivated is supplied by direct fuel injectors even though the engine is operating in a region (e.g., speed and torque) where under conditions where cylinders are not being reactivated the engine injects fuel solely via port fuel injectors.

A method for operating a multi-cylinder internal combustion engine in which every active cylinder operates in a four-stroke mode and every deactivated cylinder filled with an approximately completed gas filling is compressed and expanded during the four-stroke operation of the activated cylinder. In a method in which excitations of a crankshaft speed are minimized, a limited number of even-numbered cylinders of a multi-cylinder internal combustion engine (2) having a maximum even number of cylinders (20, 21, 22, 23, 24, 25) are deactivated sequentially, the limited even number of cylinders being smaller than the maximum even number of cylinders (20, 21, 22, 23, 24, 25) of the multi-cylinder internal combustion engine (2).

The invention relates to the vehicles for off-road driving, both on land and on water, which can be used for construction of vehicles with good cross-country ability, (all-terrain vehicles). An all-terrain vehicle comprises a cabin with a glazing and a door, a passenger compartment, a frame, an engine with an exhaust system, a transmission gearbox, a steering gear, a running gear comprising a final drive system connected with at least two pairs of axle shafts with the wheels mounted on them having the low pressure tires, a suspension connected with the wheel tires, a tire inflation system, a heating system, a control system, is different in that it comprises an air line connected simultaneously with all wheel tires and associated with a tire inflation system. A suspension of an all-terrain vehicle comprises a wheel suspension system connected with the wheel tires, a fluid power drive, and a tire inflation system, is different in that a wheel suspension system is configured as an air line formed by the hollow tubes welded together to make a frame formed by the side members and the cross bars or it is configured outside a frame to form a closed circuit connected with each tire by means of the pipelines with the valve members, whereas as a fluid power drive and a tire inflation system the claimed invention provides an engine exhaust system equipped with a damper and connected with an air line through a pipeline with a valve member.

Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines operating in a cylinder output level modulation mode (e.g., skip fire, multi-level skip fire, or firing level modulation modes). In some circumstances, turbo lag can be mitigated by initially transitioning the engine to an intermediate effective firing density that is higher than both the initial and target effective firing density to increase the flow of gases through the engine and the turbocharger while maintaining a compressor ratio the same as or close to the initial compressor pressure ratio. After reaching a point where the desired torque is actually generated at the intermediate effective firing density, the operational effective firing density is gradually reduced to the target effective firing density while increasing the operational compressor pressure ratio to the target compressor ratio.

Methods and systems to provide compressed air to one or more air consumers external to the engine via exhaust gases of an internal combustion engine are presented. In one example, the exhaust gas may be routed to drive an air turbine of an air compression system. The air compressed at the compression system may be stored in a tank and/or provided to the one or more air consumers.

Methods and systems are provided for an air system. In one example, a system includes a boost device configured to be driven by exhaust air from a plurality of cylinder in order to compress ambient air. The compressed ambient air is delivered to a tank configured to store compressed gases.

A system includes a controller coupled to an exhaust gas aftertreatment system coupled to a plurality of combustion cylinders of an engine. The controller is structured to: determine that the engine is operating in a low load operating condition; deactivate a combustion cylinder based on the determination that the engine is operating in the low load operating condition such that an exhaust gas temperature threshold corresponds with when the combustion cylinder is deactivated; increase an engine exhaust gas temperature while the combustion cylinder is deactivated via at least one thermal management command; and reactivate the deactivated combustion cylinder in response to the engine operating with a load greater than a preset threshold for a certain period of time.

Systems and methods for cooling an internal combustion engine via flowing air through the internal combustion engine during select conditions are presented. In one example, lift of intake and/or exhaust poppet valves may be adjusted as a function of engine temperature. In addition, opening and closing timings of intake and exhaust poppet valves may be adjusted as a function of engine temperature.