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.

The invention relates to design of all-terrain vehicles. The vehicle comprises a gas line which is connected to all of the wheel tires simultaneously and is coupled to a system for inflating the tires. A suspension comprises a wheel springing system connected to the wheel tires, a pneumatic drive and a system for inflating the tires, wherein the wheel springing system is configured in the form of an gas line formed from the cavities of the pipes from which a frame is welded, or is configured outside the frame, forming a closed loop that is connected to each of the tires by means of pipes with closure members, and wherein the pneumatic drive and the system for inflating the tires are constituted by an engine exhaust system which is provided with a baffle and is coupled to the air line by means of a pipe with a closure member.

Methods and systems are provided for improving fuel efficiency and tailpipe emissions of a variable displacement engine. Fueling is initially disabled in cylinders selected to be deactivated while pumping air through the cylinders to an exhaust after-treatment catalyst, and then valve operation is disabled. On reactivation, if manifold vacuum is dissipated, one bank of cylinders are reactivated while the other bank is operated in DFSO with valves pumping air until manifold vacuum is reestablished.

Methods and systems are provided for improving fuel efficiency and tailpipe emissions of a variable displacement engine. Fueling is initially disabled in cylinders selected to be deactivated while pumping air through the cylinders to an exhaust after-treatment catalyst, and then valve operation is disabled. On reactivation, if manifold vacuum is dissipated, one bank of cylinders are reactivated while the other bank is operated in DFSO with valves pumping air until manifold vacuum is reestablished.

The invention relates to design of all-terrain vehicles. The vehicle comprises a gas line which is connected to all of the wheel tires simultaneously and is coupled to a system for inflating the tires. A suspension comprises a wheel springing system connected to the wheel tires, a pneumatic drive and a system for inflating the tires, wherein the wheel springing system is configured in the form of an gas line formed from the cavities of the pipes from which a frame is welded, or is configured outside the frame, forming a closed loop that is connected to each of the tires by means of pipes with closure members, and wherein the pneumatic drive and the system for inflating the tires are constituted by an engine exhaust system which is provided with a baffle and is coupled to the air line by means of a pipe with a closure member.

A gas feeding arrangement for feeding gas from an internal combustion engine cylinder chamber to a gas tank includes a feeding conduit assembly and a dedicated feeding valve. The feeding valve is adapted to assume an open condition in which it provides for gas transport in a direction from the cylinder chamber towards the gas tank, via the feeding conduit assembly. The gas feeding arrangement includes a one-way valve adapted to prevent gas transport from the gas tank to the cylinder chamber, via the feeding conduit assembly.

A method is provided for controlling an internal combustion engine including at least one first cylinder and at least one second cylinder with respective reciprocating pistons, each of the first and second cylinders being arranged to receive air from a fresh air intake arrangement, to receive fuel, and to provide repetitive combustions by means of the received air and fuel, the method including receiving in the first cylinder air from the fresh air intake arrangement, expelling from the first cylinder gases in the form of the air received in the first cylinder or gases including at least a portion of the air received in the first cylinder, guiding to the second cylinder gases expelled from the first cylinder, injecting fuel into the second cylinder so as to provide repetitive combustions with air in the gases guided from the first cylinder to the second cylinder, and, while guiding to the second cylinder gases expelled from the first cylinder, throttling or inhibiting the supply to the second cylinder of air from the fresh air intake arrangement, wherein guiding to the second cylinder gases expelled from the first cylinder includes guiding to the second cylinder all gases expelled from the first cylinder.

The invention relates to design of all-terrain vehicles. The vehicle comprises a gas line which is connected to all of the wheel tires simultaneously and is coupled to a system for inflating the tires. A suspension comprises a wheel springing system connected to the wheel tires, a pneumatic drive and a system for inflating the tires, wherein the wheel springing system is configured in the form of an gas line formed from the cavities of the pipes from which a frame is welded, or is configured outside the frame, forming a closed loop that is connected to each of the tires by means of pipes with closure members, and wherein the pneumatic drive and the system for inflating the tires are constituted by an engine exhaust system which is provided with a baffle and is coupled to the air line by means of a pipe with a closure member.

Methods and systems are provided for compression heating of air. In one example, a method may include, during an engine start and prior to a first combustion event, deactivating cylinder exhaust valves while spinning the engine electrically and unfueled until a threshold intake air temperature is reached, and alternately activating and deactivating the exhaust valves of one or more cylinders to maintain the intake air temperature above the threshold temperature after the first combustion event. In this way, a temperature of an air charge may be increased, resulting in increased fuel economy and decreased vehicle emissions.

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.