Patents Examined by M. Macy
  • Air-fuel ratio control system for catalytic engine exhaust emission control
    Patent number: 5259358
    Abstract: A closed loop fuel control system for an internal combustion engine in which the temperature of the exhaust gases passing by the oxygen sensor are regulated. The system utilizes a heated oxygen sensor in a slipstream of the exhaust gas and the temperature of the exhaust gas is controlled prior to its passing by the heated oxygen sensor for maximum efficiency of the catalytic converter.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: November 9, 1993
    Assignee: Gas Research Institute
    Inventor: Tze-Ning Chen
  • Troubleshooting system for exhaust gas recirculation controller
    Patent number: 5257610
    Abstract: A troubleshooting system for an exhaust gas recirculation (EGR) controller, which troubleshoots the EGR controller in an optimal short EGR-OFF time by not only detecting either a rate of change of an intake manifold pressure or a difference between a maximum and a minimum thereof associated with the turning on and of the EGR in accordance with an EGR flow amount using an operation condition detecting means, but also detecting a number of revolutions of an engine or the like.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: November 2, 1993
    Assignee: Mitsubishi Denki K.K.
    Inventor: Hirofumi Ohuchi
  • Coated piston and process for applying coating
    Patent number: 5257603
    Abstract: A coated piston and a process for applying same to a piston of an internal combustion engine having a cylinder. The piston and cylinder are made primarily from a lightweight metal. Graphite bonded in cured resin is applied to the piston and forms a durable running layer.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: November 2, 1993
    Assignee: Mahle GmbH
    Inventors: Manfred Bauer, Manfred Ziegler
  • Marine engine
    Patent number: 5253618
    Abstract: An outboard motor having an air compressor for delivering compressed air to a scavenging system for the engine. The air compressor is designed so that when the engine is not running, any moisture which may be present in the pumping cavity of the air compressor will drain out of the outlet opening of the compressor.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: October 19, 1993
    Assignee: Sanshin Kogyo Kabbushiki Kaisha
    Inventors: Masanori Takahashi, Yoshihide Hirano
  • Reed valve assembly for an intake manifold and method of assembly
    Patent number: 5253617
    Abstract: A valve assembly is provided for location in a fluid flow path between an intake manifold and a cylinder for preventing blow back from the cylinder into the manifold and for reducing back pressure in said manifold on an internal combustion engine. The assembly comprises a plurality of valved units each having an inlet and an outlet. The inlet is operatively connected to the intake manifold, and the outlet is operatively connected to the cylinder. A valve member is disposed on each of the units and is flexible between a valve open position where the member is offset from the outlet, and a valve closed position where the member operatively closes the outlet, thereby preventing reversed fluid flow from the cylinder into the intake manifold. A novel method of assembling the reed valve assembly of the present invention is also provided.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: October 19, 1993
    Assignee: Capsonic Group Inc.
    Inventors: Richard E. Fitzpatrick, William K. McDannel, Craig R. Leitner
  • Internal combustion engine having a hypereutectic aluminum-silicon block and aluminum-copper pistons
    Patent number: 5253625
    Abstract: An internal combustion engine having an engine block containing a plurality of cylinder bores and a piston slidably mounted in each bore. The block is composed of a hypereutectic aluminum-silicon alloy containing from 16% to 30% silicon and having precipitated primary silicon crystals, while the piston is composed of an aluminum-copper alloy containing from 10% to 15% by weight of copper.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: October 19, 1993
    Assignee: Brunswick Corporation
    Inventors: Raymond J. Donahue, Terrance M. Cleary, Benjamin L. Sheaffer
  • Two cycle engine
    Patent number: 5251584
    Abstract: Two embodiments of two cycle, crankcase compression engines wherein exhaust emissions are controlled by controlling the amount of scavenging air flow at low and mid ranges. The scavenging air flow is controlled by balance passages that interconnect at least two crankcase chambers of the engine and in which a control valve is provided. In one embodiment, the balance passage is positioned above the crankcase chambers and communicates with them through downwardly extending passages so as to preclude the likelihood of condensation of fuel or lubricant in the balance passages and to return any fuel or lubricant to the crankcase chambers.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: October 12, 1993
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Akihiko Ohkubo
  • Fuel injection system for two cycle engine
    Patent number: 5249557
    Abstract: A fuel injection system for engines that employs a fuel injector that sprays into a chamber to which compressed air is delivered and which chamber communicates with the combustion chamber through a port that is opened and closed by the reciprocation of the piston if applied to a reciprocating engine. The source of compressed air may either be an air compressor or a crankcase chamber of the engine and the air compressor and/or crankcase chamber may also provide scavenging air for the engine. A variety of port arrangements are disclosed which include either single ports or a plurality of ports either circumferentially or axially spaced from each other and disposed between either the scavenge ports and exhaust ports or around a scavenge port or an exhaust port.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: October 5, 1993
    Assignee: Sanshin Kogyo Kabushiki Kaisha
    Inventors: Masahiko Katoh, Masanori Takahashi
  • Reed valve assembly
    Patent number: 5245956
    Abstract: A reed valve assembly includes a two ported base member adapted for placement within a fuel/air supply of an engine. The base has a reed cage with first and second reed cage faces defined on the downstream face such that the faces of the reed cage define an upright V opening downstream relative to the base. Reed petals cover openings in the reed cage faces and prevent back flow from the downstream side to the upstream side of the valve assembly. Flow from the upstream side to the downstream side is accomplished by the reed petals flexing towards one another. The reed petals are held in place by a clamping bar, which allows adjustment of the flexing tension for fine tuning of valve operation.
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: September 21, 1993
    Assignee: Barry Davidson
    Inventor: James C. Martin
  • Apparatus for the magnetic treatment of fuel
    Patent number: 5243946
    Abstract: An apparatus for the magnetic treatment of fuel for an internal combustion engine, for separating fuel impurities from the fuel molecules, including a conduit which passes through a plurality of magnetic pack means. Each magnetic pack means exposes the passing fuel to a net positive magnetic field influence. Each magnetic pack means is formed from a number of magnets having alternately oriented poles, arranged along one side of the conduit, with reflectors extending perpendicular to the conduit, positioned between the magnets. Further reflectors are positioned within the conduit, substantially in alignment with the magnetic pack means.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: September 14, 1993
    Assignee: Gekko International, L.C.
    Inventor: Romulo V. Dalupan
  • Plastic intake pipe and the method thereof
    Patent number: 5243933
    Abstract: A plastic intake pipe for an internal combustion engine, has an inside pipe provided in the plastic intake pipe and formed integrally from the intake duct portion to the intake manifold portion, a supporting member inserted in the inside pipe for supporting an inside wall of the inside pipe for fixing the intake duct portion and the intake chamber, and an outside pipe for entirely covering the inside pipe. The intake pipe prevents itself from deforming and damaging while assembling in the internal combustion engine and provides a simple structure for handling.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: September 14, 1993
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Tatsuhiko Mukawa
  • Multiple stage reed valves for use in internal combustion engines
    Patent number: 5243934
    Abstract: The present invention provides improved multiple stage reed valve construction for internal combustion engines. The reed valves comprise first stage reed valves with multiple ports in the first stage reed valve. Beams having a smoothly shaped curve from the base of the first stage reed valve to the apex thereof and narrowing toward the apex separate adjacent ports. The reed valves of the present invention provide significant improvements in engine operation.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: September 14, 1993
    Inventor: Eyvind Boyesen
  • Diesel fuel preheater for engines
    Patent number: 5243953
    Abstract: Diesel fuel preheaters with a heat exchanger and electric heating serve, for example, at low temperatures to maintain the flowability of diesel fuel and furthermore to quickly heat diesel fuel to achieve defined conditions for a fuel conserving and emission reduced combustion of the fuel and a better engine performance. The diesel fuel preheaters are provided with an integrated control unit and are adaptable to various engines and operational conditions. A special electric heating element in cooperation with the integrated control unit and the heat exchanger provide a fast and economic preheating of the diesel fuel. Furthermore, various advantageous couplings and mechanisms for the regulation of the heat transfer from the heat-deliverying medium such as cooling water to the diesel fuel at the heat exchanger are shown and described.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: September 14, 1993
    Assignee: Hermann-Frank Muller
    Inventor: Werner K. Fuchs
  • Apparatus for the treatment of gases in a positive crankcase ventilation system
    Patent number: 5243950
    Abstract: An apparatus for the treatment of gases in a positive crankcase ventilation (PCV) system, in an internal combustion engine, is provided with a housing defining a gas treatment chamber. Gas filtering media is passed through the chamber and the gases from the engine crankcase are passed throughout the gas filtering media in the chamber, before the gases are routed into the air intake portion of the engine.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: September 14, 1993
    Assignee: Gekko International, L.C.
    Inventor: Romulo V. Dalupan
  • Diagnostic device for exhaust gas recirculation device
    Patent number: 5243949
    Abstract: A diagnostic device for an exhaust gas recirculation device comprising an exhaust gas recirculation control valve. When the temperature of the engine cooling water exceeds a predetermined temperature, vacuum acts on the vacuum chamber of the exhaust gas recirculation control valve and the supply of the exhaust gas recirculation gas is started. A temperature sensor is arranged in the exhaust gas recirculation passage. When the temperature of the engine cooling water is slightly lower than the predetermined temperature, if the temperature of the interior of the exhaust gas recirculation passage exceeds a predetermined temperature, it is determined that the exhaust gas recirculation control device has malfunctioned.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: September 14, 1993
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kouichi Osawa
  • 2-cycle engine
    Patent number: 5239950
    Abstract: A number of embodiments of outboard motors embodying pressure scavenged 2-cycle internal combustion engines. In each embodiment, a plenum chamber serves the scavenge passages of the engine and the pressure relief for a scavenge pump is provided by a pressure relief valve in the plenum chamber so as to reduce the opening and closing of the pressure relief valve due to pulsations caused by the engine operation. In one embodiment, the pressure is relieved by discharging the air to the exhaust system for silencing and also for cooling the exhaust gases. In other embodiments, the air for pressure relief is discharged to the atmosphere.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: August 31, 1993
    Assignee: Sanshin Kogyo Kabushiki Kaisha
    Inventor: Masanori Takahashi
  • Delay stroke piston and rod for engine
    Patent number: 5239958
    Abstract: A reciprocating piston internal combustion engine comprises a cylinder having opposed ends, a piston reciprocably mounted in the cylinder, a connecting rod having a crank journal end and a piston journal end, the connecting rod connected to the piston at the piston journal end by means for first and second wrist pins spaced longitudinally along the rod, the first wrist pin journaled in a bore in the piston and in a slot in the piston rod, and the second wrist pin journaled in a bore in the piston rod and a longitudinal slot in the piston.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: August 31, 1993
    Inventor: Benjamin V. Booher
  • Low friction reciprocating piston assembly
    Patent number: 5239955
    Abstract: A low-friction piston construction for use in an oil-fed cylinder bore with the piston skirt relieved to define lands that are coated with SFL (graphite, MoS.sub.2, BN, and a special expoxy resin). A method of making such piston construction including provision of asperities on the skirt wall onto which the SFL coating is thermally sprayed and formation of small pockets at the mouth of the asperities to additionally act as oil replenishing reservoirs. A method of using such piston construction in an engine which comprises provisions of a slightly increased gap between the piston and cylinder wall and formation of a transferred SFL coating from the piston to the cylinder wall resulting in two polished microsmooth mating coatings, each attractive to oil films.
    Type: Grant
    Filed: January 7, 1993
    Date of Patent: August 31, 1993
    Assignee: Ford Motor Company
    Inventors: Vemulapalli D. N. Rao, Daniel M. Kabat, David A. Yeager
  • Fuel injection system for the two cycle engine
    Patent number: 5237966
    Abstract: Several embodiments of fuel injection systems for two cycle internal combustion engines wherein fuel is injected into a conduit for delivery into the combustion chamber through a port in the cylinder liner. A nozzle insert is positioned in the conduit and has a restricted opening that forms the discharge through which fuel and gas under pressure are supplied to the combustion chamber for facilitating servicing and replacement.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: August 24, 1993
    Assignee: Sanshin Kogyo Kabushiki Kaisha
    Inventors: Masahiko Katoh, Masanori Takahashi, Seiji Inoue
  • Two-stage cycle engine and combustion chamber
    Patent number: 5237972
    Abstract: A two-stroke cycle spark ignition engine having cylinder fuel injection is provided with a combustion chamber featuring a delta shaped bowl or cavity that is configured and positioned in the cylinder head to improve scavenging of the combustion chamber near the injector while maintaining adequate squish flow for improved charge mixing and combustion.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: August 24, 1993
    Assignee: General Motors Corporation
    Inventors: Edward G. Groff, Keith Meintjes, Ramachandra Diwakar