摘要:
A modular oil pump for use in combination with an internal combustion engine having a dry sump lubrication system. The device features a first gerotor pump having an intake port engageable in communication with at least one engine sump and having an discharge port engageable in sealed communication with a fluid reservoir for the dry sump system. A second gerotor pump, engageable in sealed communication with the fluid reservoir has a discharge port fluidly engageable with the engine lubrication system oil supply conduit. Both the first pump and second pump are assembled from separate housings, and cooperatively engaged inner and outer gears sized for rotation and in line mounting on the engine crankshaft inside a cavity in the housings. The volume pumping capacity of the first pump at a ratio to efficiently drain fluid and gas from the engine sumps and supply the reservoir with a constant supply of lubrication fluid. The device may be assembled from a kit having a plurality of different sized components to adjust the ratio of the pumping volume of the first pump to the second pump.
摘要:
An improved starting system for internal combustion engines using gaseous fuels such as hydrogen, natural gas, propane, butane and the like. In an engine using liquid fuel injection for normal operation, a sensor for the catalytic converter is provided to sense a "cold converter" condition of the sort which occurs when the engine has not been operated for some time. When starting is initiated, the gasoline introduction system is disabled and introduction of the gaseous fuel in initiated. Rapid engine start promptly occurs, even under very cold ambient conditions. Once the engine has started and has run for a period to warm the catalytic converter to a selected temperature the gaseous fuel introduction system is interrupted and the gasoline system is enabled and provides the fuel thereafter. Catalytic converter temperature is preferably measured at the catalytic material, although measurement of exhaust gas temperature at the converter or downstream thereof is often effective. If desired, gaseous fuel flow may continue for a very short period after liquid fuel flow has begun. This system improves the life of the catalytic converter and the engine, reduces hydrocarbon and carbon monoxide emissions during starting and eliminates the need for special, higher cost, gasoline mixes for winter cold starting.
摘要:
An improved Roots type supercharger for use with high performance vehicle engines. In Roots type superchargers as the lobes of the two cooperating rotors mesh, air is compressed between the approaching lobe on one rotor and inter-lobe area on the other rotor. This rapidly and severely compressses the air caught at that nip, tending to bend the rotors, overload the bearings and the rotor end seals. Also, compression heating of that air overheats the supercharger and charge air. Both of these phenomena tend to shorten the useful life of the supercharger. To overcome this problem, a row of relief passages is provided through the face of each lobe communicating with a large interior volume within the lobe. As the perforated lobe approaches the inter-lobe area of the second rotor, the air in the nip passes through the relief passages, only slightly increasing the pressure of the relatively large volume within the lobe rather than highly increasing the pressure in the nip. The relatively small pressure increase does not distort the components or significantly increase system or charge air temperature. A plurality of relief passages may also be provided in opposite lobe faces and the lobe interior may be longitudinally divided into two volumes, each communicating with the holes on only one face, where either face may act as a leading face.
摘要:
Improved intake and exhaust valves for an engine or the like for more efficient fluid flow into a cylinder and the exhausting of spent fluid therefrom. The valves of the present invention have the same general configuration of the valves of a conventional internal combustion engine except that the vertical circumferential portion of the valve head (margin) is differently configured. A curvilinear (Coanda effect) surface is employed on the intake valve between the stem side edge of the margin portion of the valve head and the valve seat and a sharp 90 degree edge is formed at the joinder of the margin and valve face (Feuling effect). The exhaust valve employs the Coanda effect curved surface portion at both the joinder of the back surface of the valve and the valve seat as does the intake valve and further employs this curved surface at the joinder of the valve face and margin of an exhaust valve. In both the intake and exhaust valves the margin of the valve is substantially twice the length of the generally accepted maximum allowable length (Feuling effect). This increased vertical margin surface may be accomplished in several ways, namely, by an increased width valve head thickness with a recessed valve head face or an increased valve head thickness alone without the recess.
摘要:
The invention relates to the smooth coating with a lyophilic (non-welling) material the passive surfaces of elements moving through or having contact with a fluid medium, such as, water, oil or the like. In one embodiment the under surfaces of the pistons, outer surfaces of the connecting rods and the crank shaft of an internal combustion engine are coated with polytetrafluoroethylene or the like which is lyophilic to the lubricating oil to which it comes in contact. Other embodiments employ lyophilic smooth coatings for ship rudders and outboard lower end units.
摘要:
An intake and exhaust system for use with internal combustion engines that uses two intake valves and one exhaust valve for each engine. The three valves are preferably circular and spaced around the cylinder centerline in said cylinder head. One or more spark plugs (or other suitable ignition devices) are provided in the head on the cylinder centerline and/or between pairs of adjacent valves. For best results, the ratio of total exhaust valve cross sectional area to total intake valve cross sectional area should be in the range of 45% to 65%. Three squish areas having a total area of at least about 12% of the bore cross-sectional area are preferably provided spaced around said combustion chamber periphery and extending between pairs of adjacent valves. At top dead center, the distance between the piston corresponding head squish pad areas is up to about 0.02 times the bore diameter. This invention provides a fast and uniform lean burn, permits use of a high compression ratio and lower octane unleaded gasoline and provides improved thermal efficiency. Other fuels and other fuel ignition systems also benefit, such as diesel engines.
摘要:
The disclosure is directed to an improved aerodynamic helmet. The helmet has a continuous aerodynamic curvilinear front, side and top surfaces whereby the fluid flowing over and around the sides of the helmet flows in a substantially continuous flow direction from the forward curved area aft of a straight area at the greatest width or largest transverse dimensions of the helmet after leaving the surface influence thereof. The continuous transverse surface around the outer periphery of the helmet at or slightly aft of the greatest width area is provided with a fluid flow termination surface or trailing edge causing the normal direction of the fluid flow around the helmet to break loose from the surface of the helmet and continue in substantially the same direction after passing the termination or trailing edge thereby preventing turbulence to the flow rather than allowing the fluid flow to follow the surface and flow around a portion of the smaller dimension back surface of the helmet before separating therefrom which creates turbulence behind the helmet and unwanted lift thereto. The improved helmet lowers wind drag compared to the conventional helmet by about 40%.
摘要:
In an internal combustion engine utilizing hydraulic valve lifters, a source of pressurized engine oil at a higher than normally expected pressure is supplied thereto. The oil delivered to the lifter galley is derived from either an engine oil pump which produces a higher pressure oil flow then conventionally desired for normal engine operation or a separate oil pump. The pressure setting of the oil output from either pump is determined by the engine RPM, i.e. higher pressure with higher engine RPM or from pump speed if an electrically operated separate pump is employed. The exact oil pressure level delivered to the valve galley or to individual valve galleys is determined by an on board computer (engine controller) monitoring the manifold pressure, engine RPM and throttle position so that the hydraulic lifter plunger maintains contact with the valve stem regardless of engine RPM or pump motor speed and variable and different amounts oil pressure and resulting valve lift can be achieved at various selected locations on the valve lift curve created by the valve's camshaft lobe. Variable high oil pressure is supplied only to the lifters to selectively alter their normal degree of valve lift at any location along the valve's cam operating curve while the remaining oil delivery areas of the engine operate at their normally expected oil pressure levels. In event of a failure of normal engine oil pump operation when a second auxiliary pump for galley delivery is used, an electric valve is provided to channel oil from the auxiliary pump to the engine areas requiring lubrication.