CN203685406U - Air cylinder cover of diesel engine - Google Patents

Abstract

The utility model discloses an air cylinder cover of a diesel engine. The air cylinder cover is of an integral structure integrating a plurality of cylinders. The air cylinder cover comprises air inlet channels, air inlet ports, oil injector installation holes, air exhaust ports and an oil injector high-pressure oil inlet channel, wherein the air inlet channel and an air exhaust channel are distributed on the two sides of each cylinder of the air cylinder cover, each cylinder is provided with two air inlet ports and two air exhaust ports, the air inlet ports are connected with the air inlet channels, the air exhaust ports are connected with the air exhaust channels, the oil injector installation holes are perpendicularly formed in the center of a combustion chamber, a sealing groove is formed in the periphery of each cylinder hole, the sealing grooves cover the air inlet ports, the air exhaust ports and the oil injector installation holes, the oil injector high-pressure oil inlet channel is communicated with the oil injector installation holes, an oil injector oil return channel is communicated with the oil injector high-pressure oil inlet channel, and an oil injector oil return hole is connected with the oil injector high-pressure oil inlet channel. According to the air cylinder cover of the diesel engine, inflation efficiency inside the air cylinders can be improved, oil pockets are more evenly distributed, emission is effectively reduced, the number of peripheral parts is reduced, the cost is lowered, and the sealing performance and reliability of the air cylinder cover are improved.

Description

Cylinder head of a diesel engine

technical field

The utility model relates to a cylinder head of a diesel engine.

Background technique

The cylinder head is an important part of the diesel engine. The air enters the combustion chamber through the intake port on the cylinder head and mixes with the atomized diesel oil. After compression and combustion, exhaust gas is formed and discharged through the exhaust port on the cylinder head. At present, the cylinder head of a diesel engine basically adopts a two-valve intake and exhaust structure, and its inflation efficiency is low. In addition, the oblique installation of the fuel injector cannot make the fuel injection evenly distributed, and cannot meet the increasingly stringent engine emission requirements; Both oil return and oil return require external connection pipelines, the layout is relatively complicated, and it is easy to cause leakage of external pipelines; generally, the bottom plane of the cylinder head is a plane structure around the cylinder hole, and the sealing performance is poor.

Utility model content

In order to solve the above problems, the utility model proposes a cylinder head of a diesel engine, which can improve the gas charging efficiency in the cylinder, make the distribution of the oil beam more uniform, effectively reduce emissions, reduce peripheral parts and cost, and improve the sealing performance of the cylinder head and reliability.

In order to achieve the above object, the utility model adopts the following technical solutions:

A cylinder head of a diesel engine, which is an integral structure of multiple cylinders, including an intake port, an intake port, a fuel injector installation hole, an exhaust port, an exhaust port, a sealing groove, a fuel injector return hole, and a fuel injection port. The high-pressure oil inlet passage of the device; among them, the intake passage and the exhaust passage are distributed on both sides of each cylinder of the cylinder head, each cylinder has 2 intake ports and 2 exhaust ports, the intake port is connected to the intake port, and the exhaust The gas port is connected to the exhaust port; the fuel injector installation hole is vertically arranged in the center of the combustion chamber, and a sealing groove is provided around each cylinder hole, and the sealing groove wraps the intake port, exhaust port and fuel injector installation hole; the fuel injector The high-pressure oil inlet passage communicates with the fuel injector mounting hole, the fuel return passage of the fuel injector communicates with the high-pressure fuel inlet passage of the fuel injector, and the fuel return hole of the fuel injector connects with the high-pressure fuel inlet passage of the fuel injector.

The side where the air inlet is located is provided with an oil outlet of an oil return hole.

The beneficial effects of the utility model are:

(1) The utility model is a multi-cylinder integrated cylinder head, which greatly improves the reliability;

(2) The four-valve intake and exhaust structure is adopted, and the intake and exhaust passages are distributed on both sides of the cylinder head, which greatly improves the charging efficiency in the cylinder, and makes the injector vertically arranged to have better oil beam distribution and air mixing , effectively reduce emissions;

(3) Equipped with fuel injector installation holes, no additional fuel injector bushing is required, which reduces the cost, avoids the sealing problem caused by installing the fuel injector bushing, and reduces leakage points;

(4) There is a high-pressure oil inlet passage of the fuel injector, which communicates with the installation hole of the fuel injector. During installation, it is connected to the fuel injector through a high-pressure connection pipe to supply fuel. The high-pressure fuel inlet of the fuel injector is located on the air intake side of the cylinder head; The oil return hole of the fuel injector is also set in the cylinder head, and the oil return hole of the fuel injector is connected with the high-pressure oil inlet passage, and the oil outlet of the oil return hole is also set on the air intake side of the cylinder head; It is separated from the engine oil chamber, avoiding the damage to the engine caused by the diesel oil leaking and mixing with the engine oil. At the same time, the external connection pipeline is reduced, and the structure is simpler, which not only reduces the cost, but also improves the reliability;

(5) A sealing groove is processed around the cylinder hole on the bottom plane of the cylinder head, which improves the sealing performance of the cylinder gasket.

Description of drawings

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

Fig. 2 is a structural schematic diagram of the intake and exhaust ducts of the present utility model;

Fig. 3 is a schematic diagram of the bottom plane structure of the utility model;

Fig. 4 is the method diagram of sealing groove of the present utility model;

Fig. 5 is a structural schematic diagram of the installation hole of the fuel injector and the high-pressure fuel inlet channel of the fuel injector of the present invention;

Fig. 6 is a structural schematic diagram of the oil return hole of the injector and the high-pressure oil inlet channel of the injector of the present invention.

Among them, 1. Intake port, 2. Intake port, 3. Injector installation hole, 4. Exhaust port, 5. Exhaust port, 6. Sealing groove, 7. Injector oil return hole, 8. Injector high-pressure oil inlet passage.

Detailed ways:

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

As shown in Figures 1 to 6, an integral cylinder head of a diesel engine is arranged with an intake port 1, an exhaust port 5, an injector installation hole 3, an injector high-pressure oil inlet channel 8 and an injector return oil Hole 7. Among them, the intake port 1 and the exhaust port are distributed on both sides of each cylinder of the cylinder head, and each cylinder has two intake ports 2 and two exhaust ports 4, the intake port 2 is connected to the intake port 1, and the exhaust port The door 4 is connected to the exhaust port 5; the fuel injector installation hole 3 is vertically arranged in the center of the combustion chamber, and a sealing groove 6 is provided around each cylinder hole, and the sealing groove 6 wraps the intake port 2, the exhaust port 4 and the fuel injector Installation hole 3; injector high-pressure oil inlet passage 8 communicates with injector installation hole 3, and injector return oil passage communicates with injector high-pressure oil inlet passage 8; injector return oil hole 7 communicates with injector high pressure The oil inlet channel 8 is connected.

The utility model is a multi-cylinder integral cylinder head, which greatly improves the reliability.

The cylinder head adopts a four-valve intake and exhaust structure, and the intake and exhaust channels 5 are distributed on both sides of the cylinder head, which greatly improves the charging efficiency in the cylinder, and makes the injector vertically arranged to have better oil beam distribution and air mixing. , effectively reducing emissions.

There is an injector installation hole in the cylinder head, no additional injector bushing is needed, which reduces the cost, avoids the sealing problem caused by installing the injector bushing, and reduces leakage points.

The cylinder head is provided with a fuel injector high-pressure oil inlet passage 8, which communicates with the fuel injector installation hole 3. During installation, it is connected to the fuel injector through a high-pressure connection pipe to supply fuel. The high-pressure fuel inlet of the fuel injector is located at the cylinder head side; the cylinder head is also provided with an injector oil return hole 7, which is connected to the injector high-pressure oil inlet passage 8, and the oil outlet of the oil return hole is also located on the intake side of the cylinder head. This structure separates the intake and return of diesel oil from the engine oil chamber, avoiding the damage to the engine caused by the leakage of diesel oil and mixing with engine oil, and at the same time reducing the external connecting pipelines, the structure is simpler, which not only reduces the cost, but also improves the reliability .

A sealing groove 6 is processed around the cylinder hole on the bottom plane of the cylinder head, which improves the sealing performance of the cylinder gasket.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (2)

1. a cylinder cover for diesel engine, is characterized in that: be the monolithic construction of multi-cylinder one, comprise intake duct, inlet valve port, mounting hole of oil sprayer, exhaust doorway, air outlet flue, seal groove, oil sprayer spill port, oil sprayer high pressure oil input channel; Wherein, intake duct, air outlet flue are distributed in the both sides of each cylinder of cylinder head, and every cylinder has 2 inlet valve ports and 2 exhaust doorways, and inlet valve port connects intake duct, and exhaust doorway connects air outlet flue; Mounting hole of oil sprayer is arranged vertically in central position, firing chamber, and every cylinder cylinder hole is provided with seal groove around, seal groove parcel inlet valve port, exhaust doorway and mounting hole of oil sprayer; Oil sprayer high pressure oil input channel communicates with mounting hole of oil sprayer, and oil sprayer back oil road is communicated with oil sprayer high pressure oil input channel; Oil sprayer spill port is connected with oil sprayer high pressure oil inlet passage.

2. a kind of cylinder cover for diesel engine as claimed in claim 1, is characterized in that: described intake duct place one side is provided with spill port oil outlet.

Images