CN2668873Y

CN2668873Y - Four-valve petrol engine cylinder head

Info

Publication number: CN2668873Y
Application number: CNU2003201234278U
Authority: CN
Inventors: 尹晋宪; 靳素华; 夏顺礼; 钱多德; 杨林强
Original assignee: Anhui Jianghuai Automobile Co Ltd
Current assignee: Anhui Jianghuai Automobile Co Ltd
Priority date: 2003-12-17
Filing date: 2003-12-17
Publication date: 2005-01-05
Anticipated expiration: 2013-12-17

Abstract

The utility model relates to a four-valve petrol engine cylinder head. The middle part of the cylinder head is provided with four pavilion-shaped combustion chambers side by side, the pavilion-shaped combustion chambers are respectively provided with two exhaust valve holes and two air inlet valve holes, the center vertical position of the pavilion-shaped combustion chambers is provided with a spark plug hole, and the cylinder head part of the combustion chamber is provided with a water jacket. The cylinder head is provided with a lubricating oil path, two sides of the cylinder head are provided with a shaft hole for installing a double-top camshaft, and the centre position of the cylinder head is provided with a valve clearance regulator hole. The utility model can be used as the cylinder head of the engine with 85-88mm cylinder radius and 2. 0-2. 4L displacement capacity. The transmission of a gas distribution mechanism is relatively simple, and the reliability is high. The spark plug hole vertically arranged at the center part of the combustion chamber can decrease bursting and vibration, and the pavilion-shaped combustion chamber makes the combustion more sufficient, which can obtain better economic index. The double-top camshaft makes the rigidity of the gas distribution system higher, which can obtain better whole vehicle dynamic index and provide the technical support for the variable application and the cylinder inwards direct injection of the engine at the same time.

Description

Four-valve petrol machine cylinder cover

Technical field

The utility model relates to technical field of internal combustion engines, specifically relates to a kind of four-valve petrol machine cylinder cover.

Background technique

The advance of current motor how, is embodied in the combustion case in gas distribution system and the firing chamber to a great extent.What state's intrinsic motivation used in a large number is 2 valves, OHV technology, the size of the cylinder cap of this type of motor is little, combustion-chamber shape is simple, low cost of manufacture, but the ventilation ability of two air valve structures of this type of cylinder cap, simultaneously because the insufficient exhaust index that causes of burning is low, what this type of technology adopted during engine design at present is also considerably less.2 valves, the OHV technology at home on the market by 4 valves, the two pitman arm shaft technology of Single Over Head Camshaft replace, the advantage of the engine cylinder cover of this type of technology is: the application of four Valves Technology improves the scavenging efficiency in the cylinder greatly, power per liter can reach about 40, the shortcoming of the engine cylinder cover of this type of technology is: be difficult to the realization spark-plug hole and arrange in the firing chamber central vertical, thereby quick-fried shaking easily taken place influence the thermal efficiency of motor and output power, also can reduce the working life of part, the driving mechanism complexity of simultaneously two pitman arm shafts, the manufacture cost height, assembling difficulty is big, simultaneously do not have advance technically yet, lost further upward mobility.

Summary of the invention

The purpose of this utility model is to be cylinder diameter 85-88mm, and the motor of discharge capacity 2.0-2.4L provides one to be difficult for quick-fried high-caliber cylinder head of shaking takes place, and satisfies the high and low emission request of the complete machine thermal efficiency.

Technical solutions of the utility model: a kind of four-valve petrol machine cylinder cover, it is characterized in that four the fluffy shape firing chambers that in the middle part of cylinder head, are arranged side by side, all establish two exhaust valve ports and two inlet valve ports on the fluffy shape firing chamber, establish spark-plug hole in central vertical position, fluffy shape firing chamber, the cylinder cap of firing chamber is partly established water jacket; Establish oil leab on the cylinder head, establish the axis hole that Dual Over Head Camshaft is installed in the both sides of cylinder head, install the lash adjuster hole at the cylinder head centre bit.Described fluffy shape firing chamber, its volume is 40-50ml, and the intake valve throat diameter is 25-30mm, and the exhaust valve throat diameter is 24-28ml, and spark-plug hole is arranged in the firing chamber central vertical.Described oil leab is a lateral arrangement on cylinder head, vertically arranges that wherein two vertical oil ducts arrange that by the cylinder cap edge other two vertical oil ducts are arranged in the cylinder head center portion for four.Cylinder head is provided with EGR technology air flue interface.

The beneficial effects of the utility model: the cylinder head that can be used as cylinder diameter 85-88mm, discharge capacity 2.0-2.4L motor, the transmission of distribution device is simple relatively, the reliability height, spark-plug hole is arranged in the firing chamber central vertical can reduce quick-fried shaking, fluffy shape firing chamber makes burning more abundant, can obtain the better economic index, Dual Over Head Camshaft makes gas distribution system rigidity higher, can obtain car load power index preferably, provide technical support for advanced persons such as from now on engine application variable timing, in-cylinder direct injections simultaneously.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a worm's eye view of the present utility model.

Fig. 2 is a plan view of the present utility model.

Fig. 3 is vertical view of the present utility model.

Fig. 4 is a water jacket sectional view of the present utility model.

Fig. 5 is a left view of the present utility model.

Fig. 6 is an EGR technology air flue interface sectional view of the present utility model.

Among the figure 1, exhaust valve port, 2, inlet valve port, 3, horizontal oil duct, 4, water hole on the cylinder cap, 5, exhaust crest places the cam axis hole, 6, the hole, valve clearance, 7, the intake valve aditus laryngis, 8, the exhaust valve aditus laryngis, 9, air inlet crest places the cam axis hole, 10 _1-4, vertical oil duct, 11, spark-plug hole, 12, EGR technology air flue interface, 13, the air inlet side, 14, exhaust side.

Embodiment

Structural type of the present utility model be for can install Dual Over Head Camshaft, 16 valves and 16 lash adjusters.Dual Over Head Camshaft can be contained in respectively on exhaust crest places the cam axis hole 5 and the air inlet crest places the cam axis hole 9 and by the finger-type rocking arm and directly drive the inlet and outlet door, referring to Fig. 3.Four the fluffy shape firing chambers that are arranged side by side at cylinder head middle part are all arranged two exhaust valve ports 1 and two inlet valve ports 2 above, are four cylinders, 16 valve ports.Establish spark-plug hole 11 in central vertical position, fluffy shape firing chamber, be convenient to reduce quick-fried shaking, valve nasal bridge region heat load is reduced.Fluffy shape firing chamber, its volume are 44ml, and spark-plug hole 11 is in firing chamber central vertical layout, as shown in Figure 1, 2.Intake valve aditus laryngis 7 diameters are 288mm, and exhaust valve aditus laryngis 8 diameters are 263mm, and the inlet flow area is increased, and flow resistance reduces, so charging efficiency improves greatly, and pumping loss reduces, and sees Fig. 3.A horizontal oil duct 3, four vertical oil leabs 10 have been arranged on the cylinder cap _1-4, the lubricant oil in the horizontal oil duct 3 on the cylinder cap is guided into each kinematic pair, wherein two

oil ducts

10 ₁, 10 ₄Arrange by the cylinder head edge, for Dual Over Head Camshaft provides lubricant oil; Other two oil ducts 10 ₂With 10 ₃Be arranged in the cylinder cap center and provide lubricant oil for lash adjuster hole 6.Water jacket is arranged around the The combustion chamber, forming a closed loop with body water jacket, water pump, cooling water tank fully cools off engine chamber from → body water jacket → cylinder head water jacket water case → water pump cooling water circulation, simultaneously because exhaust side temperature height, thermal distortion easily takes place, so the wall thickness that fire power face goes out will be higher than the air inlet side, as shown in Figure 4.Air flue interface 15 adopts EGR technology air flue interface to see Fig. 5,6.

The utility model adopts cast aluminium alloy.

Claims

1, a kind of four-valve petrol machine cylinder cover, it is characterized in that four the fluffy shape firing chambers that in the middle part of cylinder head, are arranged side by side, all establish two exhaust valve ports and two inlet valve ports on the fluffy shape firing chamber, establish spark-plug hole in central vertical position, fluffy shape firing chamber, the cylinder cap of firing chamber is partly established water jacket; Establish oil leab on the cylinder head, establish the axis hole that Dual Over Head Camshaft is installed in the both sides of cylinder head, install the lash adjuster hole at the cylinder head centre bit.

2, four-valve petrol machine cylinder cover according to claim 1, it is characterized in that described fluffy shape firing chamber, its volume is 40-50ml, and the intake valve throat diameter is 25-30mm, the exhaust valve throat diameter is 24-28ml, and spark-plug hole is arranged in the firing chamber central vertical.

3, four-valve petrol machine cylinder cover according to claim 1, it is characterized in that described oil leab lateral arrangement on cylinder head, vertically arrange that wherein two vertical oil ducts arrange that by the cylinder cap edge other two vertical oil ducts are arranged in the cylinder head center portion for four.

4,, it is characterized in that cylinder head is provided with EGR technology air flue interface according to claim 1,2 or 3 described four-valve petrol machine cylinder covers.