摘要:
The propeller shaft fairing is U-shaped in vertical section, and is partitioned to provide two separate sea chests from which water may be drawn for engine cooling purposes. The wall of the fairing in the region of the foremost sea chest is slot-wise apertured parallel to the propeller shaft and adjacent to the uprising side of the shaft when it is rotating to propel the craft forwardly, whereupon water is both rammed and pumped into the forward sea chest. The wall of the fairing in the region of the rearmost sea chest is apertured so that when the craft is moving in reverse water is rammed thereinto. Thus, under all conditions an adequate source of cooling water is available via at least one of the sea chests. The cooling water pump intake conduit includes separate branches drawing from the sea chests, and these branches are valve controlled automatically by means of the craft's operating control system.
摘要:
Water inlets (16) are formed on the sides of the gearcase (13) of a marine propulsion unit. Ramps (26) and (27) are formed in the gearcase (13) ahead of the inlets (16) to direct flow to the inlets (16). The ramp (26) ahead of the upper ports (16) has a greater depth to provide a substantial flow of water at positive pressure, while the ramp (27) ahead of the lower ports (16) has a lesser depth to avoid disturbances in flow when the unit is operated at high speeds where the upper inlets (16) are normally above the resting surface of the water.
摘要:
An outboard motor having a liquid cooled internal combustion engine with an improved sacrificial anode for protecting the cooling system of the engine from electrochemical corrosion. The sacrificial anode is mounted in such a way that it may be conveniently removed for inspection or servicing without removal of any other component of the engine.
摘要:
A marine propulsion device including a fluid pumping device comprising a first mechanism for pumping fluid comprising a pump housing defining a recess, a movable wall which is in the recess and which cooperates with the recess to define a variable volume fluid pumping chamber, a fluid inlet in communication with the fluid pumping chamber, a check valve in the fluid inlet permitting fluid flow into and preventing fluid flow from the fluid pumping chamber, a fluid outlet in communication with the fluid pumping chamber, a check valve in the fluid outlet preventing fluid flow into and permitting fluid flow from the fluid outlet, a spring for moving the movable wall in one direction, a solenoid mechanism comprising a plunger connected to the movable wall and a solenoid coil for moving the plunger and the movable wall in an opposite direction against the action of the spring, and a second mechanism connected to the movable wall for pumping fluid.
摘要:
Two embodiments of water-cooled, four-cycle internal combustion engines used for outboard motors. In each embodiment, an arrangement is provided that offers a compact nature and which uses the coolant delivered to the engine for cooling the oil in the oil pan. In addition, an arrangement is provided whereby the exhaust pipe may pass through the oil pan and yet avoid significant heat transfer from the exhaust system to the lubricating system. In each embodiment of the invention, coolant is delivered to this clearance for further cooling the exhaust system. In one embodiment of the invention, an arrangement is provided for limiting the discharge of coolant from the clearance so as to maintain a level of coolant around the exhaust pipe.
摘要:
In a heat exchanger primarily for usage in conjunction with a marine vessel, said heat exchanger includes a longitudinal member formed having at least one passageway provided therethrough, and a series of radially extending fins integrally connecting longitudinally of said member. The longitudinal member is preferably approximately semicircular in configuration, with said fins extending from the conic-like surface of said semicircular design, with the other or flat surface of said member provided for flush mounting against the hull of the vessel. Said fittings communicate by means of fluid lines with the cooling system of the inboard engine of the vessel, thereby providing a path for transfer of its cooling fluid or medium from said engine, and through the heat exchanger for effective dissipation of its heat out of the radial fins and into the ambient water.
摘要:
An intelligent sea water cooling system including a first fluid cooling loop coupled to a heat exchanger, a second fluid cooling loop coupled to the heat exchanger and including a fluid pump for circulating fluid through the second fluid cooling loop, and a controller operatively connected to the fluid pump. The controller may be configured to monitor an actual temperature in the first fluid cooling loop and to adjust a speed of the fluid pump based on the monitored temperature in order to achieve a desired temperature in the first fluid cooling loop.
摘要:
A marine engine quick drain system that is comprised of several engine block drain connections, provided in the area of the engine that must be drained, which drain by means of flow tubes to a drainage connector, a drainage connector which preferable is mounted on a slight incline, stably supported upon a bracket, to the boat hull, the lower end of the collector having a drain valve, such as a spring loaded lever valve, connecting with another singular drain tube, to the hull drain port, such that when the levered valve is opened, all of the coolant fluids and water within the boat engine will drain back into the lake, to empty the engine of any freezable water, when the boat is stowed, upon a boat lift, as when not in usage.
摘要:
A personal watercraft is disclosed with a hull, a seating assembly, and a four stroke internal combustion engine below the seating assembly. The engine has at least one intake valve for each of the combustion cylinder chambers, at least one exhaust valve for each of the combustion cylinder chambers, and a valve actuation assembly located in a cylinder head for operating the intake and exhaust valves. At least one air intake passageway is operatively coupled to the combustion cylinder chambers through the intake valves. An air intake manifold is connected to the cylinder bead and operatively connected to the at least one air intake passageway. The engine also has a supercharger for boosting air to the air intake manifold. The watercraft also includes a propulsion unit, operatively coupled to the crankshaft, which is located on one end of the two ends of the crankcase.
摘要:
An anode mounting structure for a marine engine including a metallic gasket mounted on the mating face between components of the engine, such as a cylinder head and a cylinder body, which form a coolant passage extending across the components, and an anode for corrosion prevention facing the coolant passage, in which the anode is attached to the gasket.