Internal-combustion engines – Cooling – With cooling of additional parts or materials
Patent
1996-06-14
1997-07-15
Kamen, Noah P.
Internal-combustion engines
Cooling
With cooling of additional parts or materials
123196A, 123196AB, F01P 1108
Patent
active
056473060
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an assembly of auxiliary apparatus for an internal combustion engine; an internal combustion engine including the assembly; and a unitary base structure for the assembly.
2. Description of the Prior Art
A number of assemblies combining auxiliary apparatus such as oil filter units and oil cooler devices are known. These assemblies are generally designed for external mounting on internal combustion engines. Such assemblies are provided to reduce engine envelope size and to reduce the number of connecting conduits between the auxiliary apparatus in order to reduce the number of possible leakage paths and facilitate installation and maintenance of said auxiliary apparatus.
U.S. Pat. No. 4370957 discloses an assembly of auxiliary apparatus comprising an oil cooler device and a twin oil filter unit, together with an oil pump and a coolant pump which share a common drive shaft. The oil cooler device housing has a mounting surface for attachment to an engine and a flange for mounting the coolant pump, upon which is provided a further flange for mounting the oil pump. The auxiliary apparatus can be interchanged separately although, except in the case of the oil filters and the oil pump, not without disturbing at least one other piece of apparatus.
The mounting surface of the oil cooler device housing is spaced from an inner wall of the housing which, together with other walls of the housing, generally encloses an oil pathway and a coolant pathway, the arrangement being such that when the assembly is attached to an engine the inner wall is located on a side of the mounting surface spaced away from the engine. Whilst this assembly still allows the engine envelope size to be reduced, it does not maximize the amount by which the engine envelope size can be reduced.
OBJECTS AND SUMMARY OF THE INVENTION
It is an object of the present invention to obviate or mitigate the disadvantages of the prior art.
According to one aspect of the present invention there is provided an assembly of auxiliary apparatus for an internal combustion engine comprising a coolant pump, an oil cooler device and an oil filter unit combined and interconnected as a constructional unit for mounting on the internal combustion engine, wherein the oil cooler device comprises a housing having an oil pathway and a coolant pathway, the pathways being arranged to allow heat exchange between oil and coolant flowing through the pathways, and the housing has a mounting surface for attachment to an internal combustion engine.
Preferably, the housing is constructed as a two part sub-assembly with the oil pathway and the coolant pathway each located partly within an outer cover with their remaining portions located within an inner cover which, in use, is located in the recess in the engine and forms a part of a coolant jacket of the engine.
The outer cover includes means for attaching the cooler device to the engine cylinder block, and the inner and outer covers of the housing may be arranged such that when the outer cover is fastened to the engine, it clamps the inner cover in position.
Alternatively, the inner cover is formed, in use, by a wall of the engine.
By either of these arrangements, a reduced engine envelope can be achieved compared with the prior art in which the coolant pathway of the cooler device is spaced outwardly from a mounting surface of the oil cooler device.
The oil pathway may comprise a plate type cooler element.
Means for enabling the coolant pump to be connected to the oil cooler device may comprise a coolant pump backplate with an integral coolant inlet connection incorporated in the outer cover of the housing.
The outer cover may have further means incorporated therein to enable the oil filter unit to be connected to the oil cooler device.
Thus, the coolant pump and-oil filter unit can be separately serviced or replaced without disturbing the other apparatus comprising the assembly of the invention.
Preferably, in use, coolant flowing through the coolan
REFERENCES:
patent: 2067421 (1937-01-01), Sergardi
patent: 2730083 (1956-01-01), Kremser
patent: 4370957 (1983-02-01), Skatsche et al.
Kamen Noah P.
Perkins Limited
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