CN201381911Y - A secondary air cylinder head - Google Patents

Abstract

The utility model relates to a secondary intake cylinder end, which comprises a cylinder end (1) which is provided with a secondary intake passage (3) communicated with an exhaust passage (2), and is characterized in that the secondary intake passage (3) is connected with a one-way valve. The cylinder end has simple and compact structure and low cost.

Description

A secondary air cylinder head

technical field

The utility model relates to a cylinder head, in particular to a secondary intake cylinder head applied to motorcycle engines and general power machinery.

Background technique

As people become more and more aware of environmental protection, countries now have higher and higher requirements for engine emissions. Therefore, a secondary air intake check valve device is added to the engine to reduce emissions by utilizing the secondary combustion of exhaust gas on the cylinder head. For example, the one-piece supplementary air cylinder head patent disclosed in the patent No. 200720106314.5 uses heat insulation pads and gaskets to connect the one-way valve with the cylinder head, and a secondary air supply valve is installed outside the single-way valve, so such a structural assembly part Many, the cost is higher.

Utility model content

The purpose of the utility model is to provide a secondary air cylinder head with simple structure.

The purpose of this utility model is achieved through the following technical solutions: a secondary air intake cylinder head, including a cylinder head, the cylinder head has a secondary air intake channel communicated with the exhaust channel, it is characterized in that: the secondary air intake The air inlet is connected with the one-way valve.

The one-way valve may include a one-way valve body and a one-way valve cover matched with the one-way valve body.

In order to further simplify the structure, the inlet of the secondary air inlet is provided with a cavity matching with the one-way valve body, and the one-way valve body is arranged in the cavity.

In order to ensure the airtightness of the one-way valve, a sealing ring is provided on the one-way valve body for sealing between the one-way valve body and the one-way valve cover, and between the one-way valve body and the cavity.

The beneficial effects of the utility model are: the body of the secondary air intake check valve is directly made on the cylinder head, and it is sealed by the rubber sealing ring on the check valve and the check valve cover, so the overall structure is simpler Compact and less costly.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is an exploded view of Fig. 1 .

Detailed ways

The utility model will be further described below through specific embodiments, but the utility model is not limited to the following specific embodiments.

Embodiment 1: As shown in Figure 1 and Figure 2, a secondary air intake cylinder head includes a cylinder head 1, the cylinder head 1 has a secondary intake air passage 3 communicating with the exhaust passage 2, and the secondary air intake passage 3 communicates with the exhaust passage 2. The air inlet 3 is connected with a one-way valve; the one-way valve includes a one-way valve body 4 and a one-way valve cover 5 matched with the one-way valve body 4; the inlet 3 of the secondary air inlet 3 -1 is provided with a cavity 6 matched with the one-way valve body 4, and the one-way valve body 4 is arranged in the cavity 6; the one-way valve body 4 is provided with a sealing ring 7 for The sealing between the one-way valve body 4 and the one-way valve cover 5 and the one-way valve body 4 and the cavity 6 .

When the engine using this cylinder head is working, the filtered air enters the one-way valve through the valve cover, and then directly enters the secondary intake port 3, and performs secondary combustion with the exhaust gas in the exhaust port 2 at high temperature, thereby Reduce engine emissions.

Claims (4)

1, a kind of secondary air inlet cylinder head comprises cylinder head (1), and described cylinder head (1) has the secondary air inlet road (3) that is communicated with air outlet flue (2), it is characterized in that: described secondary air inlet road (3) is connected with one-way valve.

2, secondary air inlet cylinder head as claimed in claim 1 is characterized in that: described one-way valve comprises one-way valve body (4) and the unidirectional valve gap (5) that matches with described one-way valve body (4).

3, secondary air inlet cylinder head as claimed in claim 2 is characterized in that: the entrance point in described secondary air inlet road (3) is provided with the die cavity (6) that matches with described one-way valve body (4), and described one-way valve body (4) is arranged in the described die cavity (6).

4, secondary air inlet cylinder head as claimed in claim 3 is characterized in that: described one-way valve body (4) is provided with seal ring (7).

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