Abstract: The dual pass intercooled supercharger includes a supercharger and intercooler. The system is configured such that air leaving the supercharger traverses the intercooler from one side to an opposing side two or more times.

Abstract: A supercharger system is disclosed herein having a front end, a rear end, an inlet and an outlet, the system contained within a housing, wherein the supercharger system includes a rotor assembly, and a plurality of intake runners that comprise an interlaced cross-runner pattern, wherein the supercharger system comprises a front drive, front inlet configuration and an inverted orientation.

Abstract: A cylinder head comprising a single intake valve and at least two exhaust valves per cylinder. The two or more exhaust valves may provide additional curtain area and total cross sectional area for the exhaust flow and better performance for engines equipped with a cylinder head in accordance with the present disclosure.

Abstract: An electronic fuel injection system for land vehicles, comprising: a fuel tank, at least one pump, a fuel sump, wherein the at least one pump is operatively coupled to and between the fuel tank and the sump, and an engine, wherein the engine is operatively coupled to the fuel sump. A fuel sump system for land vehicles, comprising: an inlet from a pump, wherein the pump is operatively connected to a fuel tank, a fuel pump system, a regulator operatively coupled to the fuel pump system, an outlet operatively coupled to an engine, and a float component, coupled to the inlet. An electronic fuel injection system for land vehicles, comprising: a fuel tank, at least one pump, a fuel sump, wherein the at least one pump is operatively coupled to and between the fuel tank and the sump, and an engine, wherein the engine is operatively coupled to the fuel sump and wherein the electronic fuel injection system does not require a return line from the engine to the fuel tank.

Abstract: The dual pass intercooled supercharger includes a supercharger and intercooler. The system is configured such that air leaving the supercharger traverses the intercooler from one side to an opposing side two or more times.

Abstract: The dual pass intercooled supercharger includes a supercharger and intercooler. The system is configured such that air leaving the supercharger traverses the intercooler from one side to an opposing side two or more times.

Abstract: An electronic fuel injection system for land vehicles, comprising: a fuel tank, at least one pump, a fuel sump, wherein the at least one pump is operatively coupled to and between the fuel tank and the sump, and an engine, wherein the engine is operatively coupled to the fuel sump. A fuel sump system for land vehicles, comprising: an inlet from a pump, wherein the pump is operatively connected to a fuel tank, a fuel pump system, a regulator operatively coupled to the fuel pump system, an outlet operatively coupled to an engine, and a float component, coupled to the inlet. An electronic fuel injection system for land vehicles, comprising: a fuel tank, at least one pump, a fuel sump, wherein the at least one pump is operatively coupled to and between the fuel tank and the sump, and an engine, wherein the engine is operatively coupled to the fuel sump and wherein the electronic fuel injection system does not require a return line from the engine to the fuel tank.

Abstract: An exhaust muffler (1) invention includes an entry chamber (9), a resonator chamber (15), and a baffle chamber (23) positioned in serial order between an exhaust gas inlet (3) that lets exhaust gas into the entry chamber and an exhaust gas outlet (5) from the baffle chamber that lets the exhaust gas exit to the exterior. A pass-through tube (21) provides an exhaust gas passage extending from the first entry chamber, through the resonator chamber and into the baffle chamber; and a baffle system (2,4,6, 8, 10, 12 & 14) located in the baffle chamber, contains a plurality of baffles positioned between the resonator chamber at one end and said exhaust gas outlet at the other end for reflecting sound admitted into said baffle chamber via said pass-through tube, whereby interference patterns of reflected sound are produced that lessen the intensity of the sound that exits along with exhaust gas from said outlet tube.

Abstract: A tunable nitrous plate assembly for fuel injected 5.0 liter V8 engines contains a metal plate (1) that is sandwiched between the upper and lower manifold members of the engine air intake manifold. The plate contains multiple ports (17) mate with the ports in the lower manifold member and, thereby, lead to individual intake runners of the engine cylinders. Each port includes a nitrous oxide spray conduit (21) overlying a fuel spray conduit (23) with both conduits extending across the port transverse to the longitudinal plate axis. Fittings (22, 20) attached to the plate exterior couple an end of respective spray conduits for fluid communication with appropriate nitrous oxide and fuel supplies. Replaceable calibration jets (45, 46) installed in respective fittings (22, 20) in series with the supply lines are selected so that the horsepower generated by the engine cylinders is balanced.

Abstract: A nitrous plate (1) includes four end-fed nitrous oxide spray conduits (2, 4, 6 & 8) positioned coplanar in the plate passage (21), supported at one end by respective walls (17, 18, 92 & 20) of the plate with closed distal conduit ends positioned near the center (22) of the plate passage. Two conduits (2, 6) are coaxially aligned with their closed ends in confronting relationship across the central axis of the plate passage. The remaining conduits (4, 8) are coaxially aligned with closed ends in confronting relationship across the central axis to the passage and are oriented perpendicular to the other conduits. Four fuel spray conduits are included in a separate plane and are organized in the foregoing way. The distal ends of the spray conduits are mechanically linked together by a junction block (10).

Abstract: A twin tube shock absorber having inner and outer tube with an annular reservoir between the tubes. A piston in the inner tube divides the inner tube into an upper chamber and a lower chamber and valves through the piston control stiffness of the shock absorber. An acceleration sensitive valve assembly mounted in the base valve makes the shock absorber “soft” upon downward acceleration of the wheel of the vehicle in which the shock absorber is mounted. The valve assembly includes a port for fluid communication between the lower chamber and a conduit, and an inertial mass blocking the port in a port-closed position and not blocking the port in a port-open position. The inertial mass is normally in a lower port-closed position in absence of downward acceleration of the tubes of the shock absorber. Upon downward acceleration of the tubes, the inertial mass moves upwardly toward a port-open position where fluid flow through the port is not blocked.

Abstract: The cylinder head for a twin V-twin motorcycle engine contains an intake port entrance lies in a plane oriented at an angle of less than ninety degrees to another plane defined by the center lines to the intake and exhaust valve guides and the entrance is characterized by a rectangular shape that is tilted from the horizontal plane of the head so that one of the three corners to the rectangular shape is lower in vertical position than the other three. The floor, the lower side between the two lower most corners, is oriented perpendicular to the intake valve guide.

Abstract: An air oil separator adapted for attachment to a dry sump type oil pump incorporates a novel centrifuge and air ducting system. The centrifuge is formed of two disks axially spaced on a hollow rotatable shaft with the shaft having small air passages located between the disks that extend radially through to a hollow interior of the shaft. An air duct couples an open end of the centrifuge shaft to an air outlet for exhausting air from the shaft interior to the upper air side of the oil sump. Axially rotating at high speed the centrifuge separates air from inputted oil by throwing the oil to the outer reaches of the housing where the oil exits through an outlet and the separated air is exhausted through the shaft and duct.

Abstract: Greater torque and power are realized in V-twin motorcycle engine with a cylinder head having a combustion chamber that incorporates two flow relief areas, one for each of the intake and exhaust ports, located on opposite right and left sides of the combustion chamber, and flow resist areas about the remaining portions of the respective port's periphery, obstructing gas flow into the flow resist areas. The foregoing arrangement defines a gas reversion path from the exhaust port that zig-zags through the chamber to the intake port, increasing the length of the path and reducing the adverse effect of reversion. A rectangular shaped intake port entrance and an accompanying rectangular shaped manifold passage provide for input of greater volume of combustible gas and a D-shaped exhaust port exit contribute to the effectiveness of the combination.

Abstract: A cylindrical pin couples a driven member, such as a rotor, to a driving shaft by means of axially and angularly aligned cylindrical grooves in the shaft and driven member defining a cylindrical cavity for receiving the pin. The pin fits in the defined cavity and radially bridges the space between the shaft and the driven member to link the two together. The shaft and pin are formed of a metal having a lower thermal coefficient of expansion characteristic than the metal forming the driven member. Torque, applied by the shaft, is applied to the rotor distributed over a portion of the cylindrical side walls of the pin.

Abstract: An exhaust manifold for an engine has sets of branches tuned to the fundamental frequency of exhaust products but with the branch length of the sets different so that the engine speed at which resonance occurs in each set is different. An inlet manifold has runner sets with each set being paired with an exhaust manifold branch set serving the same cylinders and tuned to effect resonance of combustion air in the runners at the same engine speed that resonance occurs in its associated exhaust branches.

Abstract: An intake manifold for internal combustion engines has a plurality of independent runners emanating from a central plenum. Different sets of runners have different cross-sectional areas matched to flow velocity through the manifold at maximum torque and desired engine speeds to produce a wide high torque band. The length of each runner of each set corresponds to a harmonic frequency of the fundamental frequency of air at standard temperature, but the frequency differs for each runner set. Within each set, runner cross-sectional areas are constant throughout their length. In one embodiment, the runners curve from a plenum to their exits and in the curve each runner's cross section is regular trapezoidal with the small side of the trapezoid on the inside curve and the shape of the trapezoid effecting constant static pressure throughout the cross section.

Abstract: Independent runners of a multiple runner manifold feed from two independent plenums. Alternate runners, in the sense of engine firing order, feed from alternate of the plenums. The physical separation of the plenums attenuates intercylinder interference. Long runners of small cross section provide large mixture quantity and high mixture velocity for good torque. Runner cross-sectional area also is determined by that mixture velocity at which maximum torque occurs. The runners are tuned to the first harmonic to correspond to optimum torque. The runners of one plenum pass over the runners of the other so that runner geometry is simple.

Abstract: A plurality of sensors generate signals representing engine parameters indicative of the engine fuel requirement. These signals are all applied to a single function generator to form a composite signal that is a nonlinear function of the engine fuel requirement. One of the sensors responds to absolute intake manifold pressure; responsive to this sensor, operation is inhibited, while the absolute intake manifold pressure is below a predetermined value representative of engine deceleration. An engine starter switch generates a trigger pulse to actuate an overriding multivibrator that overrides normal operation as the engine is started. One of the sensors also responds to engine coolant temperature; responsive to this sensor, the actuation duration of the overriding multivibrator is controlled in reverse relation to the coolant temperature.

Abstract: The plenum of an independent runner manifold is oriented at an angle to the longitudinal center line of the manifold such that each carburetor throat of a four barrel carburetor sees the entire entrance of two adjacent runners of different runner pairs. Each of four runner pairs has two runners leading from the plenum to side-by-side inlet ports. The wall lengths within a runner are made at least nearly equal to each other. A sudden enlargement, in the form of a step, is provided proximate the entrance of each runner of a manifold to the ports of an engine along the outer wall thereof where mixture velocity is relatively low with respect to mixture velocity elsewhere in the same velocity profile. The enlargements control reverse mixture flow and increase the amount of mixture entering the engine's cylinders. It is believed that this increase in flow is partially due to a reduction or elimination of boundary layer separation in the inlet port.