Gm Global Technolgoy Operations, Inc.

William R Matthes

William C Bubniak

Neil A Schilke

Alan William Hayman

Edward D Klomp

Ko-Jen Wu

Andreas M Lippert

David L Reuss

Jennifer L Liedtke

Gerald A Silvas

Alexandros C Alkidas

Gerald J Schimelfening

A combustion chamber for a swirl flow two valve spark ignition direct injection engine includes a cylinder with a closed end having a wedge shaped combustion chamber recess. A fuel injector extends through the closed end near a shallow side of the wedge recess. A spark plug extends through the closed end at a deeper part of the wedge recess opposite from the injector. A single pair of laterally spaced intake and exhaust valves control intake and exhaust ports opening into the wedge recess. A piston in the cylinder has an outer diameter and includes a head end having a raised pedestal with a shallow upwardly angled face ending at a raised ridge and enclosing a shallow bowl in the head end. The bowl is generally oval with a major dimension generally aligned with a cylinder centerline through the valves.

Combustion chamber for swirl flow two valve spark ignition direct injection engine

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.

Stratified charge engine with charge preparation means

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. The directional vanes are so located on the valve back whereby to effect a desired direction of flow out through this discharge opening. The outside diameter of the means defining this flow passage is slightly less than the inside diameter of the cylindrical wall portion of the intake port so as to be slidably received therein. Anti-rotation means are associated with the cylinder head and the high-swirl intake valve to prevent rotation of the latter.

Induction system with high-swirl intake valve

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. An air-exhaust gas mixing valve has its outlet connected to the inlet passage in the housing, the mixing valve having an inlet for induction air and an exhaust inlet connectable to the exhaust system of the engine, a butterfly valve being positioned to control the flow of exhaust gases through the mixing valve, the butterfly valve being actuated by a linkage system operatively connected to the fuel pressure regulator whereby movement of the butterfly valve is controlled as a function of the fuel pressure in the fuel pressure regulator. The throttle-nozzle, in poppet valve form, functions as the primary throttle valve for the pressurized carburetor and is adapted to be operated by the usual throttle pedal control actuator by a vehicle operator.

Controlled exhaust gas fuel atomizing nozzle

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. The coolant system further includes an orifice in the thermostat control valve which is sized to control the rate of air pressure change in the coolant system to prolong establishment of the normal coolant level for a substantial time period on cold start.

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Troy, MI, United States of America

William R Matthes