Methods and systems are provided for a boosted internal combustion engine. In one example, a system may include an intake system for supplying charge air, a compressor arranged in the intake system, a first shut-off element arranged in the intake system upstream of an impeller of the compressor, a bypass line that branches off from the intake system upstream of the first shut-off element and that rejoins the intake system upstream of the impeller, a second shut-off element arranged in the bypass line, a compressed air line that opens into the bypass line downstream of the second shut-off element, and a third shut-off element arranged in the compressed air line. A map width of the compressor may be increased by providing airflow to the impeller via the bypass line during low mass flow conditions, and impeller acceleration may be expedited by providing compressed air via the compressed air line.

Methods and systems are provided for a boosted internal combustion engine. In one example, a system may include an intake system for supplying charge air, a compressor arranged in the intake system, a first shut-off element arranged in the intake system upstream of an impeller of the compressor, a bypass line that branches off from the intake system upstream of the first shut-off element and that rejoins the intake system upstream of the impeller, a second shut-off element arranged in the bypass line, a compressed air line that opens into the bypass line downstream of the second shut-off element, and a third shut-off element arranged in the compressed air line. A map width of the compressor may be increased by providing airflow to the impeller via the bypass line during low mass flow conditions, and impeller acceleration may be expedited by providing compressed air via the compressed air line.

A method of controlling a reciprocating internal combustion engine comprising: a cylinder defining a cavity having a first end and a second end; and a piston moveable within the cavity of the cylinder between the first end and the second end, the method comprising: receiving at least a first signal; determining a quantity of liquid air to be injected using at least the received first signal; controlling injection of the determined quantity of liquid air into the first end of the cavity at a first time when the piston is closer to the first end than the second end.

A method of controlling a reciprocating internal combustion engine comprising: a cylinder defining a cavity having a first end and a second end; and a piston moveable within the cavity of the cylinder between the first end and the second end, the method comprising: receiving at least a first signal; determining a quantity of liquid air to be injected using at least the received first signal; controlling injection of the determined quantity of liquid air into the first end of the cavity at a first time when the piston is closer to the first end than the second end.

A system for optimizing performance of an engine, including an intake manifold with an upper mount, plenum floor defining a plenum opening, lower mount defining intake openings, and intake runners communicating between the plenum and intake openings. The upper mount may be coupled to an air inlet device and the lower mount may be coupled to a cylinder head. A mountable device has an upper portion and lower portion and is configured to be inserted through the upper mount of the intake manifold to be coupled to the plenum floor so the mountable device covers the plenum opening and at least the upper portion of the mountable device remains between the upper mount and the plenum floor. A fixation system is configured align the mountable device to the intake manifold and to prevent the mountable device from decoupling from the plenum floor during engine operation. The mountable device is interchangeable without removing the intake manifold from the cylinder head.

A combustion engine has at least one cylinder with a gas exchange inlet valve and a gas exchange outlet valve. A fuel injection device injects fuel directly into the cylinder. A fresh air section can be connected intermittently for fresh gas transmission to the cylinder via the gas exchange inlet valve. An exhaust section can be connected intermittently for exhaust gas transmission to the cylinder via the gas exchange outlet valve. A throttle element is provided in the fresh air section ahead of the gas exchange inlet valve in the direction of flow of a fresh air. A fresh gas line is provided, which opens into the fresh air section after the throttle element, in the region of the at least one gas exchange inlet valve. The fresh gas line opens into the fresh air section via a nozzle, which has flow according to Bernoulli, Venturi or Coanda.

A valve arrangement for supplying air to an internal combustion engine includes a first valve and a second valve arranged within the first valve. A valve guide for use in a valve arrangement is also provided.

The present invention provides, in an internal combustion engine of the type including: a combustion cylinder having a combustion chamber; an intake port in fluid communication with the combustion chamber; an intake valve for opening and closing the intake port; an exhaust port in fluid communication with the combustion chamber; and an exhaust valve for opening and closing the exhaust portion; the improvement comprising: (a) at least one intake injector disposed within the intake port for injecting a fluid into the combustion chamber; (b) at least one exhaust injector disposed within the exhaust port for injecting a fluid toward the exhaust valve; and (c) means for controlling the at least one intake injector and the at least one exhaust injector.

A valve arrangement for supplying air to an internal combustion engine includes a first valve and a second valve arranged within the first valve. A valve guide for use in a valve arrangement is also provided.

A device for an internal combustion engine for the combustion of a gasoline-based liquid fuel, having a tank, which is gas-conductively connected to the internal combustion engine with the aid of an exhaust gas line and a first shutoff valve, a hydrocarbon storage unit, which is gas-conductively disposed between the tank and the internal combustion engine with the aid of the exhaust gas line, for temporarily storing gaseous hydrocarbon contained in an exhaust gas escaping from the tank, and a hydrocarbon sensor, which is gas-conductively disposed between the tank and the internal combustion engine with the aid of the exhaust gas line, for measuring the hydrocarbon content in a purging air supplied to the internal combustion engine, the hydrocarbon storage unit being connectable to the free surroundings with the aid of a connecting line and a second shutoff valve.