Brunswick Corporation

Other

Francis E Bertram

Gary L Meisenburg

Alvin R Zemlicka

Douglas A Kiesling

Jay L Menzel

Jack L Golz

An internal combustion engine is provided with an exhaust discharge system providing merging exhaust paths for discharging exhaust from individual cylinders into an exhaust cavity. A diverter valve is provided for selectively preventing merger of the exhaust from the individual cylinders prior to discharge, and an exhaust passage receives such diverted exhaust for discharge into the exhaust cavity. The diverter valve operates to divert exhaust at low speed operation, which provides satisfactory low speed exhaust tuning. The diverter valve is closed at high speed operation to allow the exhaust from the individual cylinders to merge prior to discharge, which provides satisfactory high speed exhaust tuning. The invention provides satisfactory exhaust tuning at both high speed and low speed operation, which heretofore had not been possible, to increase overall engine performance and power.

Marine engine exhaust system with diverter valve and alternate exhaust

A marine stern drive unit (1) includes an assemblage of a propeller-carrying drive shaft housing (10), a bell housing (9) and gimbal housing (8). Mating flow-through passages (21, 23) are disposed in the drive shaft housing and bell housing, and a dual control valve system (30, 31) joins the passages at their juncture. The valve system is arranged to be open when the two housings are assembled, but closes automatically when the housings are disassembled to retain lubricant in the separate housing assembles when the latter are separated for servicing. The valve system includes a valve (31) in one of the passages (23) which is constructed to be snapped together and to be held firmly within the passage, but manually and quickly releasable therefrom when desired. The fluid passage (23, 26) in the bell housing communicates to the gimbal housing which has a sealed fitting (60) and a lubricant carrying portion (65) passing through the usual gimbal mounting hole (14) of the boat transom (2). An inboard container (71) connected to the gimbal housing passage (66) permits inspection of the level and condition of the lubricant. The container has a one-way valve (78) therein which prevents outward leakage of lubricant fluid, but which permits sucking back of lubricant into the system during engine cooling.

Marine stern drive with through-housings lubrication system

A stern drive for a marine vessel is provided with a series of internal passageways that route the hydraulic fluid to the trim cylinders so that external hydraulic hoses can be eliminated.

Internal routing of hydraulic fluid for trim cylinders

A marine engine exhaust assembly (7) is provided with water flow path control devices which minimize back pressure. Lower intermediate elbow portions (8) and the respective bullhorn upper legs (12) are formed and joined in a manner to provide a continuous common gas-water passage which is axially linear in a fore-to-aft direction. The common gas-water passages are formed to provide a gradual reduction in cross-sectional area from top to bottom. The wall contours of the intermediate elbows gradually merge from circular at the upper end to generally elliptical at the lower end. In addition, the wall contours of the upper bullhorn legs are generally elliptical (FIG. 5) at their upper ends for communicating with the intermediate elbows, and gradually merge into a rectangular shape (FIG. 6) in the area of the bullhorn bends (13), which continues on to adjacent the bullhorn discharge portion. The leading edges of gas-water separator plates (25) are formed with a generally V-shaped downstream curve (28) which provides a slicing edge for the water. A gimbal housing (33) has water-carrying lightening pockets (38) which connect from the bullhorn to drain holes (37) in the housing body. The lightening pockets are short and terminate adjacent their respective drain holes. The inner pocket ends are broadly curved (39) in the direction of the respective drain holes.

Marine engine exhaust assembly

A hose washing machine is provided including a frame and a pair of brushes supported by the frame in opposed relationship and for receiving a hose therebetween. Each of the brushes has a planar brush face engageable with the hose, and the brushes are supported for rotation about an axis transverse to the planar brush faces. The brush face of one of the brushes is positionable in opposed mating relation with the brush face of the other brush, and at least a portion of each of the brush faces engages the hose and moves in a direction transverse to the longitudinal axis of the hose. A first motor is provided for rotating one of the brushes in one rotational direction, and a second motor is provided for rotating the other of the brushes in an opposite rotational direction. The hose washing machine also includes apparatus for spraying detergent onto the hose including a nozzle and a pump means for supplying detergent to the nozzle, the pump means including a reciprocable pump piston and a rotatable cam engaging the pump piston for driving the piston, and the rotatable cam mounted on a rotatable shaft of one of the motors for rotation therewith.

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Malone, WI, United States of America

Francis E Bertram