| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Passive air vent system for a marine propulsion engine | US10035934 | 2001-10-29 | US06500038B1 | 2002-12-31 | Matthew W. Jaeger; Thomas W. Boyer |
| A marine propulsion system is provided with a hydrophobic membrane disposed across a port of its cooling system which allows air to pass through the membrane, but inhibits water from passing through it. During draining procedures, air can freely pass into the cooling system through the membrane to replace evacuated water and avoid the formation of low pressure regions within the cooling system. During initiation of the marine propulsion engine, following a period when what has been drained from the cooling system, air can freely pass through the membrane to be expelled from the cooling system as it is replaced by water pumped in the cooling system by a sea pump. | ||||||
| 182 | Exhaust system for watercraft | US09990217 | 2001-11-21 | US06491557B2 | 2002-12-10 | Masaru Tamaki |
| A small watercraft comprises a hull having a longitudinal axis and an engine disposed within the hull. A tunnel is defined on an underside of the hull. A propulsion is driven by the engine and includes a jet pump unit disposed at least partially within the tunnel. An exhaust system communicates with the engine and extends to and terminates at an exhaust discharge outlet to discharge exhaust gases generated by the engine. The exhaust discharge outlet is located along the tunnel such that the exhaust gases are discharged into a space defined between the tunnel and the jet pump unit. An exhaust opening is located downstream of the exhaust discharge outlet and is defined between the tunnel and the jet pump unit. A barrier is located in the exhaust opening so as to form an exhaust sub-chamber in the tunnel upstream of the barrier. | ||||||
| 183 | Moisture migration inhibitor for wet marine exhausts, and method therefore | US09947605 | 2001-09-06 | US06478645B1 | 2002-11-12 | Eddie Allbright; Fred Inman, Sr. |
| A moisture inhibitor system for wet exhausts as utilized in marine applications such as boats and other watercraft. The preferred embodiment of the present invention contemplates an exhaust manifold having an inner exhaust passage which has situated therein a collection barrier or raised pocket situated to collect moisture migrating from the exhaust port, generally at the stern of the vessel. The collection pocket is heated by the exhaust stream, and is formed to collect and retain the migrating moisture, while simultaneously the heated walls of the collection barrier evaporate the collected moisture forming moisture vapor, which moisture vapor is urged through the exhaust passage and the exhaust port, where it is leaves the system. The system thereby prevents moisture migrating up the exhaust passage from reaching the engine. In the preferred embodiment of the invention, the exhaust pipe includes a generally vertical portion emanating from the engine, and an elbow at the top of the vertical portion communicating with an exhaust conduit situated generally horizontally, but with a slightly downwardly angled path leading to the exhaust port at the stern of the vessel. In this embodiment, the moisture collection pocket is situated in the lower inner portion of the generally horizontal exhaust conduit, in the vicinity of the elbow. The collection pocket is configured so as to provide minimal disturbance in the flow of exhaust through the system. An alternative embodiment of the present invention contemplates a moisture collection pocket formed inside portion of the the manifold elbow near the manifold opening at the engine head. | ||||||
| 184 | Water preclusion system for watercraft exhaust | US09844507 | 2001-04-27 | US20020094732A1 | 2002-07-18 | Tatsuya Yoshida; Tadatsugu Yamamura |
| An exhaust system for a watercraft includes a water trap arranged on a first side of a hull tunnel, a discharge port arranged on a second side of the hull tunnel, and a chamber branched from and communicating with an exhaust passage connecting the watertrap with the discharge port. | ||||||
| 185 | Exhaust timing control valve control arrangement | US09833023 | 2001-04-10 | US20020068490A1 | 2002-06-06 | Nobuyuki Ochiai |
| An engine has an exhaust control valve which is moved by a control system according to a predetermined control strategy. The control system obtains data from sensors that help the control system to identify certain characteristics of engine operating conditions. The control strategy involves cycling the exhaust control valve under predetermined engine operating conditions to clean the surface of the valve while reducing the impact of the cycling on engine performance. The cycling generally occurs during engine start-up and following engine shutdown. The cycling may be aborted during periods of rapid acceleration. | ||||||
| 186 | Exhaust system for watercraft | US09996520 | 2001-11-28 | US20020065007A1 | 2002-05-30 | Susumu Yamazaki; Shigeharu Mineo |
| An internal combustion engine includes an exhaust system. Additionally, the engine includes a secondary air injection system that injects air into the exhaust system to burn un-burnt fuel that may be entrained in the exhaust gases. The secondary air injection system can include individual secondary injection conduits, each having a check valve, and being configured to inject air into each exhaust runner of the engine. The secondary air injection system can also include, in lieu or in addition, a cooling jacket cooling a portion of the exhaust system between upstream from a catalyst device and downstream from the point of injection of secondary air. | ||||||
| 187 | Marine engine | US09648075 | 2000-08-25 | US06357399B1 | 2002-03-19 | Mitsuyoshi Nakamura |
| A two-cycle, multi-cylinder engine maintains roughly equal temperatures between cylinders, despite differing exhaust efficiencies between the cylinders. Several ways of reducing the temperature of one of the cylinders in comparison to the other are disclosed. One embodiment involves supplying more coolant to the cooling passages around the hotter running cylinder. Other ways involve reducing the compression ratio or retarding ignition timing in the hotter running cylinder in comparison to the other cylinder. | ||||||
| 188 | Personal watercraft having an improved exhaust system | US09886464 | 2001-06-22 | US20020022416A1 | 2002-02-21 | Gaetan Lecours; Robert Bourret; Eric Menard; Robert Lachance; Thomas Perron; Jeff Oler |
| A personal watercraft with an exhaust system including a first and second mufflers each disposed in opposite sides of the hull. A manifold pipe communicates the engine with the first muffler. A transfer pipe communicates the first muffler with the second muffler. An outlet pipe communicates the second muffler to the atmosphere at an exhaust point located at an opposite side of the hull. The outlet pipe has a raised portion between the second muffler and the exhaust point so that only rotation of the watercraft in a first rotational direction will cause entrant water in the outlet pipe to flow into the second muffler. The transfer pipe has a raised portion between the first and second mufflers so that only rotation of the watercraft in second rotational direction about the longitudinal axis opposite the first rotational direction will cause water that has flowed into the second muffler to flow into the first muffler. | ||||||
| 189 | Exhaust system for engine powering a watercraft | US09557301 | 2000-04-25 | US06346019B1 | 2002-02-12 | Masayoshi Nanami |
| Various embodiments of an exhaust system for an engine powering a water propulsion device of a watercraft having a hull with a front end and a rear end are disclosed. The water propulsion device is positioned near the rear end of the watercraft, with the engine connected to the hull and positioned generally towards the front end of the watercraft from the water propulsion device and having an output shaft arranged to drive the water propulsion device. The exhaust system routes exhaust from each cylinder or combustion chamber of the engine to a discharge at the rear end of the watercraft. | ||||||
| 190 | Engine arrangement for small planing watercraft | US09928422 | 2001-08-14 | US20010055924A1 | 2001-12-27 | Masayoshi Nanami |
| A small planing watercraft including a hull, a propulsion unit mounted on the hull and a high RPMnullhigh output engine for driving the propulsion unit, wherein the engine includes at least one intake valve and an intake valve timing control system for advancing the opening and closing of the intake valve when the watercraft is operating below a predetermined speed corresponding to a velocity at which the watercraft transitions from non-planing to planing motion. The engine may also include a long air intake passage for low-speed operation and a short air intake passage for high-speed operation, with an air intake control valve in the short air intake passage that is closed when the watercraft is operating below the predetermined speed. The engine may also include an exhaust control valve for constricting the exhaust passage, and a system for at least partially closing the exhaust control valve when the watercraft is operating below the predetermined speed. The invention increases the lower RPM output of a high RPMnullhigh output engine to enable faster transition of the watercraft between non-planing and planing operations. Engine intake air flows over the intake valve timing control to provide a cooling effect. | ||||||
| 191 | Cantilever jet drive package having mounting adapter with exhaust passage | US09615178 | 2000-07-13 | US06293842B1 | 2001-09-25 | Fletcher C. Belt |
| A marine vessel or watercraft in which the power plant or engine is cantilevered off of the inboard face of the transom by a mounting adapter. An inboard engine is attached to the mounting adapter. By this arrangement, the mounting adapter provides cantilevered support to the engine. The engine has at least one exhaust port for engine exhaust gases. The mounting adapter has an exhaust channel in flow communication with an exhaust port of the inboard engine. In addition, the transom has an opening in flow communication with the exhaust channel of the mounting adapter. Thus the passage in the mounting adapter provides a flow path for engine exhaust gases to pass through an opening in the hull. Optionally the exhaust channel in the mounting adapter includes a noise suppression device, e.g., a muffler. | ||||||
| 192 | Exhaust elbow with a water trap for a marine propulsion system | US09604147 | 2000-06-27 | US06290558B1 | 2001-09-18 | James E. Erickson |
| An exhaust elbow for a marine propulsion exhaust system is provided with a water trap section that defines a water collection cavity. Within the water trap section, a barrier extends downward into the water collection cavity to define first and second exhaust passages. When water begins to collect in the water collection cavity, the cross sectional area of the exhaust passage is reduced and the velocity of exhaust gases passing through the exhaust passage is increased. The water collection cavity is shaped to be easily cleared when exhaust gas pressure increases as the engine speed increases. | ||||||
| 193 | Apparatus and method for multi-conduit waterlift engine silencing | US09349871 | 1999-07-08 | US06273772B1 | 2001-08-14 | Joseph I. Smullin |
| A waterlift silencer and method for reducing the acoustic energy of a fluid mixture of engine exhaust gas and a liquid coolant and limiting back pressure exerted by the silencer on an engine, particularly as applied to engines located below the waterline of a marine vessel. The silencer has two or more mixture-expelling conduits through which the fluid mixture is dynamically lifted above the silencer to a point above the waterline. The mixture-expelling conduits are sequentially operated in order to maintain exhaust gas volume flow rates high enough to partially atomize the liquid and thus allow it to be expelled upward, while maintaining a minimal back pressure on the engine throughout the full range of normal engine operating speeds. Two mixture-expelling tubes may be used. The first tube typically has a diameter that is equal to or smaller than the diameter of the second tube, and has an opening in its bottom portion that is further from the bottom of the holding chamber than is an opening in the bottom portion of the second tube. When the engine is started, the pressure in the holding chamber pushes the free water level of the fluid mixture down to the opening in the first tube, which may thus dynamically lift the fluid mixture out of the chamber. As the engine speed increases, the free water level reaches the opening in the second tube, so that the fluid mixture is carried out through both tubes. The first tube may be located within the second tube. | ||||||
| 194 | Engine component layout and seat design for watercraft | US09217419 | 1998-12-21 | US06273014B1 | 2001-08-14 | Akitaka Suzuki |
| A watercraft includes an improved seat design that allows a rider to better absorb impact shocks with his or her legs as the watercraft bounds over wakes. The seat assembly includes a front seat section and a rear seat section that is sized to accommodate one or more riders in tandem with each rider straddling the seat. The front seat section is narrower than the rear seat section to permit the front rider to place his or her legs more directly in front of him or her. This position improves the rider's comfort and allows the rider to assume a stance in which the rider can better absorb impact shocks on the watercraft. In order to accommodate this seat design, an improved engine component layout is provided so as to reduce the width of the upper end of the engine. The induction and exhaust systems of the engine are laid out on the lower sides of the watercraft, and extend at least partially beneath foot wells that flank the sides of the seat assembly. | ||||||
| 195 | Exhaust pipe of personal watercraft and connecting structure thereof | US09323299 | 1999-06-01 | US06213828B1 | 2001-04-10 | Yoshinori Tsumiyama; Masaki Ito |
| An exhaust pipe suitable for a personal watercraft which can reduce exhaust noises, prevent a transom board from being made dirty by an exhaust gas and avoid exposing a rider trying to get onto a deck to the exhaust gas stream directly, the exhaust pipe being provided above a water line of a transom board for discharging an exhaust gas behind the personal watercraft, the exhaust pipe projects from the transom board rearward and has at least a rear portion curved downward. Consequently, an opening face provided on a rear end of the exhaust pipe is oriented obliquely rearward with respect to a water surface as seen from a side of the personal watercraft. | ||||||
| 196 | Fuel pump arrangement for watercraft | US09099286 | 1998-06-18 | US06210243B1 | 2001-04-03 | Ryoichi Nakase |
| A marine engine is constructed having an improved component layout so as to reduce the tendency of an engine fuel pump being exposed to water. This advantage is accomplished while shielding the fuel pump from water that may enter through an access opening above the engine. In one form the fuel pump is mounted under an air intake system of the engine. The fuel pump is also desirably arranged to reduce thermal effects on the fuel pump by positioning the fuel pump on an air intake pipe of the engine. In another from, the fuel pump is mounted under and inclined cylinder block and an exhaust system. | ||||||
| 197 | Exhaust outlet structure for personal watercraft | US09338091 | 1999-06-23 | US06206741B1 | 2001-03-27 | Yoshimoto Matsuda |
| A shut-off member provided on a rear end of an exhaust passage of the personal watercraft is formed to have such a shape that one of the ends of a short pipe made of nitrile rubber is flatly made, thereby including a lip portion having upper and lower side walls which come in contact with each other, and is protruded rearward and downward from a hull of the watercraft. A portion between the upper and lower side walls coming in contact with each other forms a slit to act as an exhaust port. The slit is substantially shut off based on a molding shape thereof if there is no difference between internal and external pressures of the shut-off member, and is opened against the elastic force of a surrounding flexible material depending on a differential pressure and a flow rate of an internal fluid if the internal pressure becomes higher than the external pressure. | ||||||
| 198 | Cantilever jet drive package | US265075 | 1999-03-09 | US6132269A | 2000-10-17 | Fletcher C. Belt |
| A marine vessel and jet propulsion system cantileverly mounted to the transom of a boat having a water tunnel or cavity integrally formed as a part of the boat structure. The turbojet pump assembly is cantileverly mounted on the aft portion of the transom and is connected by a drive shaft to the output of the drive engine of the boat. According to a preferred embodiment, a mounting member located between the transom and the drive engine also serves as an exhaust manifold housing. | ||||||
| 199 | Small watercraft exhaust device | US135076 | 1998-08-17 | US6066014A | 2000-05-23 | Steven George Smith; Dallas Beckwith Wynne |
| A personal watercraft having a hull with a plurality of strakes and an inboard internal combustion engine which powers a jet-pump propulsion drive for propelling the watercraft through a body of water. The watercraft includes an exhaust system, that is in fluid communication with the engine, which terminates at a number of rearwardly facing exhaust outlets. Each of the outlets is positioned in the hull adjoining one of the strakes' rearward end, thus being located below the water's surface when the hull is in its normal upright position. | ||||||
| 200 | Wedge with angularly adjustable positions | US227443 | 1999-01-08 | US6045422A | 2000-04-04 | George F. Widmann |
| An exhaust processing system for a boat including an exhaust chamber having an exhaust opening in the rear bottom thereof, and a wedge plate is pivotally mounted at the forward end of the opening. Controls are provided to pivot the wedge to thereby change the negative pressure in the exhaust chamber | ||||||
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