CN201546831U

CN201546831U - Four-valve cylinder head sharing inlet passage and exhaust passage

Info

Publication number: CN201546831U
Application number: CN2009202287693U
Authority: CN
Inventors: 徐江涛; 柯小松; 刘亮
Original assignee: BEIJING CHANGYUAN HERO CITY TECHNOLOGY Co Ltd; Xiangfan Changyuan Donggu Industrial Co Ltd
Current assignee: Beijing Changyuan Hero City Technology Co., Ltd.; Xiangfan Changyuan Donggu Industry & Trade Co., Ltd.
Priority date: 2009-10-11
Filing date: 2009-10-11
Publication date: 2010-08-11
Anticipated expiration: 2019-10-11

Abstract

The utility model provides a four-valve cylinder head sharing an inlet passage and an exhaust passage, and is mainly applied in the field of automobiles. The shared inlet passage and the shared exhaust passage are arranged in an inlet main channel and an exhaust main channel; and two inlet valves and two exhaust valves are connected with the shared inlet passage and the shared exhaust passage through two independent inlet bypasses and two independent exhaust bypasses respectively, so that a two-valve cylinder head is improved to a four-valve one under the condition that no inlet valve and no exhaust valve is additionally arranged. Due to the shared passages, the utility model can greatly reduce the size and the weight of a whole engine, can increase air inflow in a time unit by being compared with a common cylinder head, can improve the integral fuel oil-air mixing efficiency, improves burning rate, ensures that fuel oil burns more completely, effectively reduces the emission of the engine, and greatly reduces the difficulty in casting the passages of the four-valve cylinder head; particularly, methods for arranging internal water jackets can be more; and the casting qualification rate of independent cylinder heads can be higher, so as to greatly reduce initial cost.

Description

Share the intake and exhaust port four-valve cylinder head

Technical field

The utility model relates to the cylinder cap in the automotive field, particularly a kind of shared intake and exhaust port four-valve cylinder head.

Background technique

At present, along with the progressively raising of discharging standards, as the cylinder cap of engine core parts also have to the satisfy emission standard of increasingly stringent by design alteration.Particularly promote the improved process to four valves, how effectively to keep the macroeconomic of two valve cylinder caps, can satisfy the function of four-valve cylinder head simultaneously again, never have solution preferably in the industry from two valves.Most of at present the employing set up two intake ducts and two air outlet flues at cylinder cap inlet and outlet mouth place, though can realize function, has following drawback:

1, the overall volume of gas-distributing channel four-valve cylinder head is bigger than conventional two valve cylinder caps.Since increased at original air inlet and air outlet flue place one pack into, vent systems, the width that causes whole intake and exhaust port is than the big 25-30% of two valve cylinder caps;

2, the casting difficulty of gas-distributing channel four-valve cylinder head increases.Arrange double air passage in minimum space, owing to be subjected to the structural limitations of wall thickness and cooling jacket system, cause design relatively complicated, qualified casting is very low, and single cost increases;

3, the intake resistance of gas-distributing channel four-valve cylinder head is big.The single air flue of gas-distributing channel four-valve cylinder head is when air inlet, and resistance ratios is shared air flue has increased by one times, influences the air inflow of whole air flue;

4, the burning of gas-distributing channel four-valve cylinder head is less economical.Because the intake resistance of gas-distributing channel four-valve cylinder head is bigger, air inflow is less, thereby causes burning insufficient, has reduced the burning Economy.

Summary of the invention

For overcoming the deficiencies in the prior art, goal of the invention of the present utility model is to provide a kind of shared intake and exhaust port four-valve cylinder head, share into row, air flue and by-path by in the inlet and outlet main passage of cylinder cap, setting up, under the situation that does not increase the inlet and outlet door, cylinder cap is promoted to four valves from two valves, improve the burning Economy thereby reach, reduce engine emission, and the purpose that reduces single cylinder cap cost.

For achieving the above object, the technical solution of the utility model is: oil injector hole is on the face of the firing chamber of cylinder cap, the air inlet side connects with intake manifold, the exhaust side connects with gas exhaust manifold, be symmetrically distributed along the center of oil injector hole two intake valves and two exhaust valves, two intake valves are near the air inlet sides, and two exhaust valves are near the exhaust sides, set up shared intake duct in the air inlet main passage, the opening suction port of sharing intake duct is on the air inlet side; Set up shared air outlet flue in the exhaust main passage, the opening relief opening of sharing air outlet flue is on the exhaust side.

Two intake valves are respectively by two independently together shared intake duct connections of air inlet by-path; Two exhaust valves are respectively by two independently together shared exhaust by-path connections of exhaust by-path; Sharing the air inlet by-path connects with intake manifold by the opening suction port of sharing intake duct; Sharing the exhaust by-path connects with gas exhaust manifold by the opening relief opening of sharing air outlet flue.

The utility model technology has following advantage compared with the prior art:

1,, on the layout of the intake and exhaust port of cylinder cap, makes the volume of cylinder cap can dwindle 20-30%, thereby greatly reduce the volume and weight of whole motor owing to exist to share air flue;

2, owing to adopt shared intake duct, air inflow in unit time increases greatly than common cylinder cap, thereby improved whole fuel-air mixing efficiency, improved rate of burning, air in the combustion process has been had important promoting effect with mix (the hot mixed function) of unburned fuel;

3, owing to adopt shared air flue, the air flue casting difficulty of four-valve cylinder head is descended greatly, particularly the layout of inner water jacket can have more selection; The casting up-to-standard rate of separate room cylinder cap is higher, greatly reduces initial cost;

4, since share air flue in the air inflow of unit time greater than gas-distributing channel, in whole combustion process, can allow oil inflame more abundant, thereby effectively reduce engine emission.

Description of drawings

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the utility model structural representation;

Fig. 2 is the structural representation of the utility model air inlet side; (downside of Fig. 1)

Fig. 3 is that the K-K of Fig. 2 cuts open figure; (structural representation of the utility model inlet and outlet by-path)

Fig. 4 is the structural representation of the utility model exhaust side.(upper side of Fig. 1)

Embodiment

As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, oil injector hole 3 is on the firing chamber of cylinder cap 1 face 2, on the firing chamber of cylinder cap 1 face 2, along oil injector hole 3 two intake valves 4 of symmetrical distribution and two exhaust valves 5, two intake valves 4 link to each other with sharing intake duct 7 by air inlet by-path 6, and the opening suction port 8 of sharing intake duct 7 is on air inlet side 9; Two exhaust valves 5 link to each other with sharing air outlet flue 11 by exhaust by-path 10, and the opening relief opening 12 of sharing air outlet flue 11 is on exhaust side 13.

During use, pass through intake manifold through turbo charged air, suction port 8 from air inlet side 9 enters in the shared intake duct 7, pressurized air in sharing intake duct 7 is delivered to pressurized air two intake valves 4 respectively by two air inlet by-paths 6, the air that arrives intake valve 4 was poured in the firing chamber in the engine charge stage, enter air in the firing chamber after combustion chambers burn, exhaust phase at motor, flow to two exhaust by-paths 10 by two exhaust valves 5, gas of combustion in exhaust by-path 10 finally is discharged in the outlet pipe by gas exhaust manifold by sharing the relief opening 12 that air outlet flue 11 flows out on the exhaust side 13.

Claims

1. shared intake and exhaust port four-valve cylinder head, oil injector hole (3) is on the firing chamber face (2) of cylinder cap (1), air inlet side (9) connects with intake manifold, exhaust side (13) connects with gas exhaust manifold, two intake valves (4) and two exhaust valves (5) are being symmetrically distributed along the center of oil injector hole (3), two intake valves (4) are near air inlet side (9), two exhaust valves (5) are near exhaust side (13), it is characterized in that: set up shared intake duct (7) in the air inlet main passage, the opening suction port (8) of sharing intake duct (7) is on air inlet side (9); Set up shared air outlet flue (11) in the exhaust main passage, the opening relief opening (12) of sharing air outlet flue (11) is on exhaust side (13).

2. shared intake and exhaust port four-valve cylinder head according to claim 1 is characterized in that: two intake valves (4) are respectively by two independently together shared intake duct (7) connections of air inlet by-path (6); Two exhaust valves (5) are respectively by two independently together shared exhaust by-path (11) connections of exhaust by-path (10); Sharing air inlet by-path (6) connects with intake manifold by the opening suction port (8) of sharing intake duct (7); Sharing exhaust by-path (11) connects with gas exhaust manifold by the opening relief opening (12) of sharing air outlet flue (11).