The present subject matter provides a device and a method for injecting non-combustible fluid into an internal combustion. In order to reduce the non-combustible fluid consumption, the fluid to be injected is heated to a predefined temperature which improves the spray characteristics, reduces wall wetting and leads to a better vaporization of the fluid in the combustion chamber.

The present subject-matter provides a method to inject a non-combustible fluid, most preferably water, into an internal combustion engine, as well as a corresponding controller 12 and a computer program product for carrying out the method by means of a computer. It is a particular technical advantage of the claimed subject-matter that it allows for suppressing knocking in an internal combustion engine without any drawbacks regarding exhaust gas emissions. This advantage is achieved by avoiding collision of fuel and water spray when injecting both fluids directly into the cylinder 100.

The present subject-matter provides a method to inject a non-combustible fluid, most preferably water, into an internal combustion engine, as well as a corresponding controller 12 and a computer program product for carrying out the method by means of a computer. It is a particular technical advantage of the claimed subject-matter that it allows for suppressing knocking in an internal combustion engine without any drawbacks regarding exhaust gas emissions. This advantage is achieved by avoiding collision of fuel and water spray when injecting both fluids directly into the cylinder 100.

The present invention provides a method for avoiding knocking in an internal combustions engine, preferably in a gasoline engine with a high compression ratio and a variable valve train which is able to perform EIVC, by injecting a non-combustible fluid into the intake port and/or in the cylinder during a transient operating mode.

A power system including a variable volume combustion chamber for a two-stroke engine having a controlled exhaust port, a fuel injector to the combustion chamber, an oxygen injector to the combustion chamber and a water injector to the combustion chamber. The fuel, oxygen and water injectors controlled by a CPU provide repeated serial pulses of fuel, oxygen and water to complete a charge. An ignition chamber receives a compressed charge then ignited by a spark plug to pass through a restricted port to the main combustion chamber. A source of pressurized concentrated oxygen to the oxygen injector is in a closed air separator having a ceramic membrane of yttrium stabilized zirconia with a synthesized double perovskite nanofiber catalyst coating.

A power system including a variable volume combustion chamber for a two-stroke engine having a controlled exhaust port, a fuel injector to the combustion chamber, an oxygen injector to the combustion chamber and a water injector to the combustion chamber. The fuel, oxygen and water injectors controlled by a CPU provide repeated serial pulses of fuel, oxygen and water to complete a charge. An ignition chamber receives a compressed charge then ignited by a spark plug to pass through a restricted port to the main combustion chamber. A source of pressurized concentrated oxygen to the oxygen injector is in a closed air separator having a ceramic membrane of yttrium stabilized zirconia with a synthesized double perovskite nanofiber catalyst coating.

An internal combustion engine is equipped with a water injector for cooling the internal combustion engine by a spray of atomized water into the intake track or combustion chamber prior to ignition. The atomized water spray may be in the intake manifold or directly in the cylinder. The water is injected at a volume of between a ratio of about 95% fuel to about 5% water and about 50% fuel and about 50% water. The temperature of the internal combustion engine is maintained at between about 95° C. and about 200° C. during operation.

An internal combustion engine is equipped with a water injector for cooling the internal combustion engine by a spray of atomized water into the intake track or combustion chamber prior to ignition. The atomized water spray may be in the intake manifold or directly in the cylinder. The water is injected at a volume of between a ratio of about 95% fuel to about 5% water and about 50% fuel and about 50% water. The temperature of the internal combustion engine is maintained at between about 95° C. and about 200° C. during operation.

Injection method and system for the injection of water in an internal combustion engine; the following steps are substantially comprised: operating, when the internal combustion engine is turned on, a reversible pump in order to suck water from a tank and feed the water under pressure to an injector through a feeding duct; cyclically opening, when the internal combustion engine is turned on, the injector in order to inject the water towards at least one cylinder of the internal combustion engine; and draining the water, when the internal combustion engine is turned off, from the injector and the feeding duct by using a release valve connecting the feeding duct to the outside.

A spark-ignition internal combustion engine has an air intake tract for supplying fresh air to a combustion chamber of the spark-ignition internal combustion engine, an exhaust tract for discharging exhaust gases from the combustion chamber, and a urea introduction device having a urea injection nozzle for introducing an aqueous urea solution into the combustion chamber. The urea injection nozzle is disposed in the combustion chamber or upstream of the combustion chamber in relation to an air flow from the air intake tract into the combustion chamber.