Abstract: A stratified-charge combustion system design for direct-injection spark-ignited engines with the piston bowl in the exhaust-valve side. The air flow from the inlet valve provides a normal tumble in cylinder air flow. The fuel injector is positioned on the intake-valve side of the combustion cylinder and forms a charge stratification in the combustion chamber. With the piston bowl on the exhaust-valve side, the distance for spray penetration of the fuel from the injector is extended. The rate of fuel spray penetration in the combustion chamber is reduced by counter air flow against the fuel spray. The air-fuel mixture is moved upwardly to the area of the spark plug by the tumble air flow for ignition. The invention provides less piston bowl wall wetting which results in less soot formation and less emissions of undesirable hydrocarbons.

Abstract: A finger follower rocker arm system for an internal combustion engine includes a body having a first end engagable with a valve stem of the internal combustion engine and a second end engagable with a pivot fulcrum of the internal combustion engine, an arm mounted on the body between the first end and second end engagable with a cam lobe of the internal combustion engine, a latch pin disposed within the body and being moveable to engage and disengage the arm, and an actuating mechanism to engage the latch to limit movement of the arm relative to the body to transmit movement of the cam lobe to the body for activating the valve stem and to disengage the latch to allow movement of the arm relative to the body to allow lost motion of the cam lobe relative to the body for de-activating the valve stem.

Abstract: A pressure feedback EGR system including an EGR tube having a metering orifice therein and extending between an exhaust passageway and an intake passageway of the internal combustion engine, a first pressure tap connected to the EGR tube on one side of the metering orifice, a second pressure tap connected to the EGR tube on the other side of the metering orifice, and the first pressure tap and the second pressure tap each having an end disposed within the EGR tube and with each end being partially closed to form an orifice extending therethrough to reduce noise from pulsations across the metering orifice.