Cooling apparatus configurations for marine engines having a supercharger
AssigneeBrunswick Corporation
InventorGregg D. Langenfeld
Life of this patent
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Abstract
A marine engine comprises a powerhead having an engine block, a cylinder head and a crankcase containing a crankshaft. Operation of the marine engine causes rotation of the crankshaft. A crankcase cover encloses the crankshaft in the crankcase. A supercharger is on the crankcase cover, the supercharger being configured to provide charge air for combustion in the powerhead. A cooling passage conveys cooling fluid between the crankcase cover and the supercharger so that the cooling fluid cools both in the crankcase and in the supercharger.
Claims20
A marine engine comprising a powerhead having an engine block, a cylinder head and a crankcase having a crankcase cavity containing a crankshaft, wherein operation of the marine engine causes rotation of the crankshaft;
- a crankcase cover enclosing the crankshaft in the crankcase cavity such that lubricant in the crankcase cavity drains down an internal surface of the crankcase cover, the crankcase cover being removable so as to open the crankcase cavity;
- a supercharger on the crankcase cover, the supercharger being configured to provide charge air for combustion in the powerhead;
- and a cooling passage that conveys cooling fluid between the crankcase cover and the supercharger so that the cooling fluid cools the crankcase cover, the lubricant in the crankcase cavity, and the supercharger.
A marine engine comprising a powerhead having an engine block, a cylinder head and a crankcase containing a crankshaft, wherein operation of the marine engine causes rotation of the crankshaft;
- a crankcase cover enclosing the crankshaft in the crankcase;
- a supercharger on the crankcase cover, the supercharger being configured to provide charge air for combustion in the powerhead;
- and a cooling passage that conveys cooling fluid between the crankcase cover and the supercharger so that the cooling fluid cools both the crankcase and the supercharger;
- wherein the cooling passage is located adjacent to a charge air outlet from the supercharger such that the cooling fluid cools the charge air as the charge air is conveyed to the powerhead;
- wherein the charge air outlet comprises a central duct directing charge air towards the crankcase cover and port and starboard ducts directing the charge air from the central duct to port and starboard sides of the powerhead;
- and wherein the port and starboard ducts convey charge air to port and starboard charge air coolers, respectively, for cooling the charge air prior to conveyance to the powerhead.
A marine engine comprising a powerhead having an engine block, a cylinder head and a crankcase containing a crankshaft, wherein operation of the marine engine causes rotation of the crankshaft;
- a crankcase cover enclosing the crankshaft in the crankcase;
- a supercharger on the crankcase cover, the supercharger being configured to provide charge air for combustion in the powerhead;
- and a cooling passage that conveys cooling fluid between the crankcase cover and the supercharger so that the cooling fluid cools both the crankcase and the supercharger;
- wherein the cooling passage is located adjacent to a lubricant drainage port in the supercharger and crankcase cover.
An apparatus for a marine engine comprising a powerhead having an engine block, a cylinder head, and a crankcase having a crankcase cavity containing a crankshaft, the apparatus comprising a crankcase cover enclosing the crankshaft in the crankcase cavity such that lubricant in the crankcase cavity drains down an internal surface of the crankcase cover, the crankcase cover being removable so as to open the crankcase cavity;
- a supercharger on the crankcase cover, the supercharger being configured to provide charge air for combustion in the powerhead;
- and a cooling passage that conveys cooling fluid between the crankcase cover and the supercharger so that the cooling fluid cools the crankcase cover, the lubricant in the crankcase cavity, and the supercharger.
An apparatus for a marine engine comprising a powerhead having an engine block, a cylinder head, and a crankcase containing a crankshaft, the apparatus comprising a crankcase cover enclosing the crankshaft in the crankcase;
- a supercharger on the crankcase cover, the supercharger being configured to provide charge air for combustion in the powerhead;
- and a cooling passage that conveys cooling fluid between the crankcase cover and the supercharger so that the cooling fluid cools both in the crankcase and in the supercharger;
- wherein the cooling passage is defined by a cooling jacket having a first side on the supercharger and an opposite, second side on the crankcase cover such that coupling the supercharger to the crankcase cover encloses the cooling passage;
- and further comprising perimeter mating flanges on the crankcase cover and supercharger that define radially outer boundaries of the cooling jacket and having outer surfaces that face each other when the supercharger is mounted to the crankcase cover.
Dependencies are inferred from the claim text.