Systems, devices, and methods described herein provide one or more radical chemicals generators (RCGs) and/or mini-chambers (M-Cs) that can be used to provide enhanced radical ignition (ERI) in an internal combustion engine. RCGs as described herein can include quenching systems (QSs) that can be configured to quench a flame of combustion products to produce a jet of partial combustion products containing radical species (RS). The jet of partial combustion products can be injected to a main combustion chamber (MCC) of an engine to induce ERI. ERI can proceed under leaner fuel conditions and lower temperatures compared to those needed for conventional thermally induced, fuel oxidation chain initiation reaction processes.

An air/fuel mixture is ignited in an internal combustion engine by receiving the air/fuel mixture as an incoming air/fuel mixture flow from a main combustion chamber of the internal combustion engine into an enclosure adjacent the main combustion chamber. The enclosure defines a first chamber enclosing first and second ignition bodies and the enclosure defines a second chamber adjacent the first chamber and connected to the first chamber via a passage. A portion of the air/fuel mixture received in the enclosure is directed toward an ignition gap between the first and second ignition bodies and another portion is directed into the second chamber. The air/fuel mixture is then ignited in the ignition gap, and flame from combustion in the first chamber is ejected into the main combustion chamber. Then, flame from combustion in the second chamber is ejected into the main combustion chamber.

In a laser ignition device which is mounted in an internal combustion engine and at least includes a laser spark plug equipped with an optical window which protects an optical device from high temperature and high pressure generated in a combustion chamber and a prechamber cap equipped with a cylindrical prechamber, a prechamber throat portion that is a bottomed cylinder with a sectional area smaller than that of the prechamber, and a plurality of prechamber spray holes which communicate with a combustion chamber on a side of a closed end of the prechamber throat portion, the prechamber cap is arranged between the optical window and the combustion chamber. A converging point FP is located inside the prechamber to ignite an air-fuel mixture delivered into the prechamber, thereby jetting combustion flames from the prechamber into the combustion chamber to fire the internal combustion engine. The center axis AX.sub.F of the prechamber is oriented horizontally eccentrically from the center axis AX.sub.S of the prechamber throat portion.

Air/fuel mixture is received from a combustion chamber of the internal combustion engine into an enclosure about a flame kernel initiation gap between a first ignition body and a second ignition body. Air/fuel mixture received into the enclosure is directed into a flame kernel initiation gap. The mixture is then ignited in the flame kernel initiation gap.

Systems, devices, and methods described herein provide one or more radical chemicals generators (RCGs) and/or mini-chambers (M-Cs) that can be used to provide enhanced radical ignition (ERI) in an internal combustion engine. RCGs as described herein can include quenching systems (QSs) that can be configured to quench a flame of combustion products to produce a jet of partial combustion products containing radical species (RS). The jet of partial combustion products can be injected to a main combustion chamber (MCC) of an engine to induce ERI. ERI can proceed under leaner fuel conditions and lower temperatures compared to those needed for conventional thermally induced, fuel oxidation chain initiation reaction processes.

The present invention discloses a prechamber jet disturbance intensified combustion system, comprising a main combustion chamber and a main fuel injector, the lower end of a fuel nozzle of the main fuel injector is located inside the main combustion chamber; a plurality of prechambers are arranged outside the main combustion chamber, the prechambers are connected with the main combustion chamber by prechamber channels, an auxiliary fuel injector is arranged outside each prechamber, and the lower end of a fuel nozzle of the auxiliary fuel injector is located inside the corresponding prechamber. The present invention abandons layout and combustion process idea of an existing heavy-duty diesel engine combustion system, which remarkably increases the mixing rate of fuel and air and the combustion rate by using autonomous and controllable parts, materials and process conditions.

To provide an engine capable of more quickly decreasing an auxiliary chamber gas pressure and ensuring a favorable load responsiveness. A gas engine is an engine including, as combustion chambers of each cylinder, an auxiliary chamber that ignites fuel gas to generate flame and a main chamber that combusts the mixture of fuel gas and air using the flame generated in the auxiliary chamber, and includes an auxiliary chamber main pipe that supplies the fuel gas to the auxiliary chamber, an air supply passage in which the air to be supplied to the main chamber flows, and a connection pipe communicating from the auxiliary chamber main pipe to the air supply passage.

An internal combustion engine having a prechamber with first and second sub-chambers. The first sub-chamber has a prechamber gas valve and an igniter. The second sub-chamber has a plurality of first orifices to couple with a main combustion chamber. The second sub-chamber is coupled to the first sub-chamber via a direct connection or an indirection connection. The direct connection includes at least one second orifice, such as a plurality of second orifices. The indirect connection includes a third sub-chamber, wherein the third sub-chamber is coupled to the first sub-chamber by at least one third orifice (e.g., a plurality of third orifices), and the third sub-chamber is coupled to the second sub-chamber by at least one second orifice (e.g., a plurality of second orifices).

Systems, devices, and methods described herein provide one or more radical chemicals generators (RCGs) and/or mini-chambers (M-Cs) that can be used to provide enhanced radical ignition (ERI) in an internal combustion engine. RCGs as described herein can include quenching systems (QSs) that can be configured to quench a flame of combustion products to produce a jet of partial combustion products containing radical species (RS). The jet of partial combustion products can be injected to a main combustion chamber (MCC) of an engine to induce ERI. ERI can proceed under leaner fuel conditions and lower temperatures compared to those needed for conventional thermally induced, fuel oxidation chain initiation reaction processes.

An internal combustion engine, comprising a super-charging, which is designed to compress the charge air into the charge air pipe, with overpressure up to 2.8 BAR, a throttle valve, which operation is to provide a sufficient amount of charge air into the main combustion chamber, while together throttling an overpressure of the charge air from the charge air pipe to achieve a pressure reduction and thus a temperature reduction of the charge air in the intake port up to −20° C. (−4° F.), a cylinder head, which is equipped with a swirl chamber, per main combustion chamber, the size of which is 8% to 15% of the compression volume, whereby the formation of the fuel/air mixture occurs only in this swirl chamber, whereby in combination with the subcooling of the charge air in the intake port, reduces fuel consumption.