US 5,551,382 AGranted

Cooling system for an internal combustion engine

AssigneeKlockner-Humboldt-Deutz Aktiengesellschaft

InventorsLothar Bauer, Werner Lemme, Reinhard Rechberg, Wolfgang Strusch, Heinz W. Fuchs, Jurgen Wahnschaffe

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Abstract

This invention relates to a reciprocating internal combustion engine having a cylinder crankcase with a cylinder head with is designed to reduce the manufacturing and spare parts cost. A single design unified cylinder head is employed for liquid cooling and air cooling, the cylinder head having both cooling spaces for the liquid coolant and cooling fins for the cooling air. Coolant passageways in the cylinder head are connected to coolant spaces in the cylinder block portion of the cylinder crankcase by way of openings in the upper end of the cylinder block and openings in the cylinder head gasket which permit flow of coolant to the annuli in the cylinder head. In addition to the annuli, the coolant passageways in the cylinder head include a longitudinally extending header, horizontally extending web ducts extending radially inward from the annuli and vertically extending connecting conduits inclined relative to the cylinder axes interconnecting the web ducts and the header. Each connecting conduit extends through a pillar extending between the cover plate portion and the base portion of the cylinder head. The pillars are in the wind shadow of, and in a substantially parallel relationship to, injection nozzles installed in the cylinder head.

Claims11

Dependent claims

A reciprocating internal combustion engine including a cylinder crankcase having at least two cylinders cooled by liquid flowing in cooling spaces in said cylinder crankcase, a block type cylinder head elongated in one direction and having a bottom base adapted for mounting on top of said cylinder crankcase with seal surfaces for said cylinders, said cylinder head (1) including

at least one laterally extending intake duct for each cylinder including an intake valve opening in said base,
at least one laterally extending exhaust duct for each cylinder including an exhaust valve opening in said base,
laterally extending vertical cooling fans (2) for air cooling formed on said cylinder head above said bottom base,
a liquid cooling annulus (3) in said base for each cylinder, each annulus being disposed coaxial with its associated cylinder and outside of said seal surfaces, said annulus being in free flow fluid communication with one of said cooling spaces in said cylinder crankcase,
a web duct (5) extending from each annulus (3) to at least between said intake valve and exhaust valve openings of the associated cylinder,
a collecting header (7) spaced above said web ducts and extending in said one direction,
a pillar (16) extending upwardly from said bottom base above each cylinder said pillar (16) being independent of said intake and exhaust ducts and
a connecting conduit (6) in said pillar (16) interconnecting said web duct (5) and said collecting header (7), said annulus, said connecting conduit (6) and said web duct (5) being in fluid communication with one another, with said collecting header (7) and with at least one of said cooling spaces of said cylinder crankcase.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/358,083Filed 15 Dec 1994
Priority: DE 43 42 800.215 Dec 1993
Granted: 3 Sep 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

F01P 1/02
Air cooling: arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
F01P 3/02
Liquid cooling: arrangements for cooling cylinders or cylinder heads
F02F 1/38
For liquid cooling: the cylinder heads being of overhead valve type
F02F 1/40
For liquid cooling: cylinder heads with means for directing, guiding, or distributing liquid stream