Abstract: Disclosed is a stratified charge internal combustion engine having a charge preparation chamber centrally disposed at the end of each cylinder and means for direct fuel injection into the preparation chamber. A valved opening connects the charge preparation chamber with a charge admission portion of a combustion chamber having the usual intake, exhaust and spark-ignition means. In operation, the charge chamber valve is opened twice each cycle, once during a high-pressure portion of the expansion stroke to receive a charge of pressurized hot gas, after which fuel is discharged into the charge chamber to be vaporized by and mixed with the hot gas. The charge chamber valve is subsequently opened during a portion of the subsequent compression stroke so that the premixed charge is forced at high pressure into the combustion chamber for further mixing and the creation of a localized cloud of air-fuel mixture and combustion gases which is subsequently ignited by the spark.

Abstract: An induction system for an internal combustion engine includes an intake port in the cylinder head of the engine with this intake port having a straight cylindrical wall portion terminating at an angular valve seat and, a high-swirl intake valve cooperating therewith to control the direction of flow of an induction charge into the associated combustion chamber of the engine. The high-swirl intake valve includes a head with a valve stem upstanding from the backside thereof and further includes means associated with the backside of the valve head to define a flow passage for an induction charge. This means includes a rim shroud upstanding from the back of the valve head for an angular extent of at least 180.degree. to define the inlet opening for this flow passage and spaced apart directional vanes upstanding from the remaining portion of the valve back and, a semi-circular disc fixed to the top edge of these directional vanes so as to define the discharge outlet for this flow passage.

Abstract: A fuel atomizing nozzle for use as a component part of a pressurized carburetor for an internal combustion engine in an automotive vehicle includes a housing forming part of the induction fluid passage through the carburetor, the housing having an inlet passage therein terminating at one end at an induction port, flow through which is controlled by a throttle-nozzle in the form of a poppet valve having a head and a stem, the stem being slidably received within a stepped valve guide bore in the housing, the guide bore having a stepped enlarged internal diameter adjacent to the induction passage to form, with the stem of the throttle-nozzle, a fuel discharge outlet, a fuel pressure regulator is associated with the housing to control fuel flow from a source of fuel under pressure to the fuel discharge outlet.

Abstract: An internal combustion engine system having a pressurized liquid coolant system whose coolant level automatically adjusts to effect rapid combustion chamber surface temperature rise on cold start. The coolant system includes a valve which automatically opens to drain coolant from the coolant system to a reservoir in response to coolant system pressure falling below a predetermined value because of temperature decrease on engine shut-off to establish a below-normal coolant level relative to the combustion chamber surface when the engine is cold and permits the drained coolant to be pumped back to the coolant system on cold start and then closes in response to coolant system pressure rise above the predetermined value because of coolant temperature increase on engine start-up to establish and maintain the normal coolant level for engine cooling.