Abstract: A split phase fuel conditioner 10 includes a main body 20 defining an ignition chamber 22. A transfer passage 24 is in fluid communication between the ignition chamber 22 and chamber 14. A valve 28 selectively opens and closes a throat 26 of the transfer passage 24 to control fluid communication between chamber 22 and chamber 14. A first injector 30 injects a first fuel volume into ignition chamber 22. A second fuel injector 32 injects a second volume of fuel directly into transfer passage 24 through the first valve 28. The first fuel volume is ignited in the chamber 22 to form an ignition plasma. Valve 28 is opened allowing the ignition plasma to condition the second fuel volume by vaporising the second fuel volume. The ignition plasma then sweeps the conditioned second fuel volume into the combustion chamber where it combusts in a controlled manner.

Abstract: An engine has a plurality of combustion chambers, each of which is divided into an ignition chamber and a first combustion chamber. The chambers are linked by a transfer tube defining a passageway facilitating communication between the ignition chamber and the first chamber. A valve is provided for selectively opening and closing the passage. A tube is provided with an opening intermediate of its length allowing fuel to be injected via a fuel injector into the passage.

Abstract: An internal combustion engine 10 includes a first combustion chamber (20) in each of its cylinders (12). First fuel injector (24) injects a first volume of fuel into the chamber (20). A housing (28) defining an auxiliary combustion chamber (30) is coupled to the engine (10). The housing (28) includes a passage (32) that extends from the auxiliary combustion chamber (30) to the first combustion chamber (20). Fluid communication through the passage (32) is controlled by a valve (34). When the valve (34) is in an extended position it provides a high impedance to the flow of fluid between the auxiliary combustion chamber (30) and the first combustion chamber (20). However when in a retracted position, the valve (34) allows unimpeded fluid flow between the two chambers. An auxiliary air and fuel injector (38) to inject a fuel/air mixture into the auxiliary combustion chamber (34). Air for the auxiliary injector (38) is sourced from outside of the first combustion chamber (20), i.e.