CN2309427Y

CN2309427Y - Radiator of air-cooled OHV engine cylinder head

Info

Publication number: CN2309427Y
Application number: CN 97222328
Authority: CN
Inventors: 周积铝
Original assignee: BAOMA LOCOMOTIVE ENGINE RESEARCH AND DEVELOPMENT ENTERPRISE Co Ltd
Current assignee: BAOMA LOCOMOTIVE ENGINE RESEARCH AND DEVELOPMENT ENTERPRISE Co Ltd
Priority date: 1997-08-01
Filing date: 1997-08-01
Publication date: 1999-03-03
Anticipated expiration: 2007-08-01

Abstract

The utility model relates to a radiator of an air-cooled type OHV engine cylinder head. The utility model is characterized in that a cooling air passage which penetrates through the cylinder head is arranged between an air inlet passage and an exhaust passage of the cylinder head, one end of the cooling air passage bends an air collecting part outside the cylinder head, and an air collecting opening is formed on the free end of the air collecting part. When the utility model is used, the cylinder head can be combined on a cylinder body, the air collection opening of the air collecting part of the cylinder head faces an air inlet for cooling air, and cooling air can be poured into the air collecting part from the air collecting opening and flows the cooling air passage for cooling the cylinder head for preventing the damage or the deteriorated performance of an engine valve caused by overheating.

Description

The sink of ventilation type OHV engine cylinder head

The utility model relates to a kind of engine sink, relates in particular to a kind of sink that prevents the ventilation type OHV engine cylinder head that the engine cylinder head is overheated.

The cylinder head 20 (as shown in Fig. 4,5) of at present general motorcycle ventilation type OHV engine mainly is in cylinder head 20 inside, respectively be provided with an intake duct 21 and an air outlet flue 22 that is communicated to engine cylinder head 20 outsides, and be positioned at the top of cylinder head 20 at intake duct 21 and air outlet flue 22, respectively being provided with one can be for the

valve link conduit

23,24 of installing valve link, and this is the structure of at present common engine cylinder head 20.

And present this traditional ventilation type OHV engine, generally be only partly to be provided with cooling unit at engine body with cylinder, part as for cylinder head 20, several pieces radiating fin 25 then only are set to be dispelled the heat, in fact, engine is when start, the heat that the engine combustion chamber is sent is to be directly delivered on the cylinder head 20, what add that air outlet flue 22 discharged is high-temp waste gas, therefore when engine running, cylinder head 20 often remains on the state of high temperature, though the automobile door structure of cylinder head 20 inside is made with exotic material, but because porthole is the central part that is positioned at cylinder head 20, therefore the radiating effect of radiating fin 25 part of the cooling cylinder head 20 central highest temperatures effectively, therefore the radiating effect of radiating fin 25 is not very effective for porthole, so just easily because of the too high deterioration that burns out porthole or cause performance of cylinder head 20 temperature inside.

The purpose of this utility model is to provide a kind of sink of improved ventilation type OHV engine cylinder head, and it can make the cylinder head of engine obtain efficiently radiates heat, to improve the working life of porthole.

The purpose of this utility model is such: a kind of sink of ventilation type OHV engine cylinder head, its characteristics are, between the inlet and outlet road of ventilation type OHV engine cylinder head, be provided with the cooling airway of this cylinder head of perforation, this cooling airway one end is to fold a gas collection portion to the cylinder head excurvation, and the free end of this gas collection portion then forms a gas collection mouth that is communicated with cooling airway.

In the sink of described ventilation type OHV engine cylinder head, described gas collection mouth is to expand outside free end gradually.

The utility model is owing to be provided with cooling airway 12 between the intake duct 21 of cylinder head 20 inside and air outlet flue 22, when motorcycle when driving, the cool air that brushes to motorcycle is directly poured in the gas collection portion 10 by the gas collection mouth 11 of cylinder head 20, and be guided into by gas collection portion 10 in the cooling airway 12 of engine cylinder head 20 inside, and described cooling airway 12 is between inlet and

outlet road

21,22, so the cool air that enters cooling airway 12 is directly cooled off porthole, prevent the damage that causes the engine porthole because of overheated with this.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.

Fig. 1 is the structural representation according to the sink of the ventilation type OHV engine cylinder head that the utility model proposes.

Fig. 2 is the 2-2 horizontal section schematic representation of Fig. 1.

Fig. 3 is the 3-3 longitudinal profile schematic representation of Fig. 1.

Fig. 4 is the structural representation of prior art ventilation type OHV engine cylinder head.

Fig. 5 is the 5-5 horizontal section schematic representation of Fig. 4.

Describe details and working condition thereof in detail below in conjunction with accompanying drawing, therefrom also can further find out other purpose, feature and advantage of the present utility model according to the concrete device of the new proposition of this practicality.

See also Fig. 1, shown in 2 and 3, wherein label 20 is a ventilation type OHV engine cylinder head of the present utility model, respectively be provided with an intake duct 21 and an air outlet flue 22 that is communicated to cylinder head 20 outsides in engine cylinder head 20 inside, advancing,

air outlet flue

21,22 are positioned at the top of cylinder head 20, then respectively being provided with one can be for the valve link conduit 23 of installing valve link, 24, and be positioned at at this cylinder head 20, air outlet flue 21, between 22, be provided with a cooling airway 12 that laterally runs through engine cylinder head 20, one end of this cooling airway 12 is to be bent into a gas collection portion 10 outside engine cylinder head 20, and make and form an opening on the free end of this gas collection portion 10 and outside free end, expand gradually, and form the gas collection mouth 11 that is communicated with cooling airway 12.

Thus, when the utility model (is example with motorcycle) when using, cylinder head 20 can be combined on the cylinder block of motorcycle, and make the gas collection mouth 11 of cylinder head 20 gas collection portions 10, direct of travel (A) (as shown in Figure 2) towards locomotive, with this when motorcycle when driving, the cool air (B) that brushes to motorcycle is directly poured in the gas collection portion 10 by gas collection mouth 11, and be guided into by gas collection portion 10 in the cooling airway 12 of engine cylinder head 20 inside, and because cooling airway 12 of the present utility model is between intake duct 21 and air outlet flue 22, so the cool air that enters cooling airway 12 is directly cooled off porthole, prevent the damage that causes the engine porthole because of overheated with this.

Claims

1. the sink of a ventilation type OHV engine cylinder head, it is characterized in that, between the inlet and outlet road of ventilation type OHV engine cylinder head, be provided with the cooling airway of this cylinder head of perforation, this cooling airway one end is to fold a gas collection portion to the cylinder head excurvation, and the free end of this gas collection portion then forms a gas collection mouth that is communicated with cooling airway.

2. the sink of ventilation type OHV engine cylinder head according to claim 1 is characterized in that, this gas collection mouth is to expand outside free end gradually.