CN203809142U - Water cooled internal combustion engine cylinder cover, water cooled internal combustion engine provided with cylinder cover and mechanical device provided with water cooled internal combustion engine - Google Patents

Abstract

A water-cooled internal-combustion engine cylinder head, a water-cooled internal-combustion engine equipped with such a cylinder head, and a mechanical device equipped with such a water-cooled internal-combustion engine. The utility model cylinder head is divided into upper and lower cylinder head bodies. The welding seam 8030 at the connection between 87 and the outer side of the lower cylinder head 88, the welding seam 14 surrounding the spark plug hole 12, the welding seam 8032 surrounding the intake valve stem hole 8812, the welding seam 8033 surrounding the exhaust valve stem hole 8822, and the welding seam surrounding the intake valve stem hole 8822 The welding seam 8037 of the passage 887, the welding seam 8038 surrounding the exhaust passage 889, and the welding seam 8035 surrounding the cylinder head bolt hole 881 are connected to form an integral cylinder head.

Description

A water-cooled internal-combustion engine cylinder head, a water-cooled internal-combustion engine equipped with the cylinder head, and a mechanical device equipped with the water-cooled internal-combustion engine

technical field

The utility model relates to a cylinder head of a water-cooled internal combustion engine equipped with an ignition spark plug, a water-cooled internal combustion engine equipped with the cylinder cover, and a mechanical device of the water-cooled internal combustion engine equipped with the cylinder cover. the

Background technique

The cylinder head of a water-cooled internal combustion engine equipped with an ignition spark plug, especially a multi-cylinder cylinder head, is now cast with a mud core due to the complex shape of the water cavity and being enclosed in the shell of the cylinder head. The manufacturing process is complicated, sand casting is difficult, and the surface is rough. , Difficult to clean, high cost, and heavy pollution. It is urgent to create a new structure and structure of water-cooled internal combustion engine cylinder head, which can use light alloy die-casting process to manufacture water-cooled internal combustion engine cylinder head. the

CN102678352A discloses a water-cooled internal combustion engine cylinder head equipped with an ignition spark plug, which injects fuel into the intake passage to mix with air, and then enters the cylinder through the intake valve for combustion; CN102251873A discloses a central direct injection (DI) water-cooled internal combustion engine The cylinder head, the fuel injector and the spark plug are located in the central recess of the cylinder head; CN102865154A discloses an oblique direct injection type water-cooled internal combustion engine cylinder head, and the fuel injector is located on the side of the water-cooled cylinder head. the

CN202991254U and CN103452690A disclose a kind of upper and lower two bodies to manufacture the cylinder head, and then use welding, bonding, bolt fastening connection and/or riveting method to connect the upper and lower two cylinder head bodies into a technical scheme of an integral cylinder head, with The basic structure and construction approach to realize the water-cooled cylinder head manufactured by light alloy die-casting. Further, it is also necessary to create a new and better structure and structure of the upper and lower bodies of the water-cooled internal combustion engine cylinder head. Multi-cylinder water-cooled gasoline engines for automobiles, water-cooled engines using liquefied combustible gases, and various water-cooled internal combustion engines that use spark plugs to ignite fuel. Both an internal combustion engine in which fuel is injected into an intake port and an internal combustion engine in which fuel is directly injected into a cylinder can be used. the

Contents of the invention

The interior of the water-cooled internal combustion engine cylinder head equipped with ignition spark plugs in the prior art is provided with spark plug holes, intake valve stem holes, exhaust valve stem holes, intake passages, exhaust passages, cylinder head bolt holes, and water for cooling water. cavity. One way of fuel injection is that the fuel is injected into the intake port and mixed with air, and then enters the cylinder for combustion through the intake valve. Another fuel injection method is that the fuel is directly injected into the cylinder and mixed with air for combustion, and a fuel injector hole is also provided inside the cylinder head. The position where fuel is directly injected into the cylinder, one is central direct injection, and the other is oblique direct injection. the

The technical solution of the utility model to solve its technical problems is to divide the water-cooled cylinder head 80 into two different parts of the cylinder head body. The cylinder head 80 includes a spark plug hole 12, an intake valve stem hole 8812, an exhaust valve stem hole 8822, Intake passage 887, exhaust passage 889, cylinder head bolt holes 881, the cylinder head 80 is composed of upper cylinder head 87 and lower cylinder head 88 manufactured separately, wherein, the spark plug hole 12, the intake air The valve stem hole 8812, the exhaust valve stem hole 8822, the intake passage 887, the exhaust passage 889, and the cylinder head bolt hole 881 are respectively formed by the spark plug holes of the upper cylinder head 87. The cover part, the upper cylinder head part of the intake valve stem hole, the upper cylinder head part of the exhaust valve stem hole, the upper cylinder head part of the intake port, the upper cylinder head part of the exhaust port, the upper cylinder head part of the cylinder head bolt hole and the The lower cylinder head of the spark plug hole of the lower cylinder head 88, the lower cylinder head of the intake valve stem hole, the lower cylinder head of the exhaust valve stem hole, the lower cylinder head of the intake port, the lower cylinder head of the exhaust port, and the cylinder head Bolt holes are connected to the lower cylinder head, and the cylinder head water chamber 83 is composed of welds 8030 surrounding the connection between the upper cylinder head 87 and the lower cylinder head 88, welds 14 surrounding the spark plug hole 12, and 8812 surrounding the intake valve stem hole. weld 8032 around the exhaust valve stem hole 8822, weld 8037 around the intake duct 887, weld 8038 around the exhaust duct 889, weld 8035 around the cylinder head bolt hole 881 to connect the upper cylinder Cover 87 and lower cylinder cover 88 form. the

The technical solution above is applied to a water-cooled cylinder head where fuel is injected into the intake port, mixed with air, and then enters the cylinder through the intake valve for combustion. For a water-cooled internal combustion engine cylinder head equipped with an ignition spark plug that directly injects fuel in the cylinder, further, a fuel injector hole 750 is added in the cylinder head 80 . the

A fuel injector hole 750 can also be added on the cylinder head 80, and the fuel injector hole 750 is composed of the upper cylinder head portion of the fuel injector hole formed in the upper cylinder head 87 and the fuel injector hole formed in the lower cylinder head 88. The injector hole lower head portion is joined via a weld 78 surrounding the injector hole 750 . the

A bracket for installing the camshaft 85 can also be added on the upper cylinder head 87 . the

A water-cooled internal combustion engine, including a body, is characterized in that: the cylinder head 80 described in any one of the above-mentioned various technical solutions is installed on the body 70 . the

A mechanical device equipped with a water-cooled internal combustion engine, including a body 70, characterized in that: the water-cooled internal combustion engine body 70 of the above-mentioned mechanical device is equipped with a cylinder head 80 as described in any one of the above-mentioned various technical solutions. the

Description of drawings

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

Fig. 1 is a top view of a water-cooled four-cylinder internal combustion engine cylinder head equipped with an ignition spark plug. the

Fig. 2 is a sectional view of a water-cooled internal combustion engine cylinder head equipped with an ignition spark plug. The fuel injection method is that fuel is injected into the intake port and mixed with air, and then enters the cylinder for combustion through the intake valve. the

Figure 3 is a water-cooled cylinder head with direct fuel injection in a cylinder equipped with an ignition spark plug. It is an oblique direct injection water-cooled internal combustion engine cylinder head, and the fuel injector is located on the side of the water-cooled cylinder head. the

Figure 4 is a water-cooled cylinder head with direct fuel injection in a cylinder equipped with an ignition spark plug. It is a central direct injection (DI) water-cooled internal combustion engine cylinder head, and the fuel injector and spark plug are located in the central recess of the cylinder head. the

Explanation of reference signs

10. Spark plug, 12. Spark plug hole, 14. Weld around the spark plug hole, 18. Combustion chamber, 20. Piston, 70. Body, 71. Intake manifold, 72. Body water cavity, 73. Body water cavity and Water passage hole of cylinder head water chamber, 75. Fuel injector, 78. Weld seam surrounding fuel injector hole, 750. Fuel injector hole, 80. Cylinder head, 81. Communication between cylinder head water chamber and body water chamber Water hole, 83. Cylinder head water cavity, 85. Camshaft, 87. Upper cylinder head, 88. Lower cylinder head, 831. Water inlet, 832. Water outlet, 881. Cylinder head bolt hole, 8035. Surrounding cylinder head bolt Hole weld, 887. Intake port, 8037. Weld around intake port, 889. Exhaust port, 8038. Weld around exhaust port, 8812. Inlet stem hole, 8813. Intake valve Stem, 8032. Weld around intake valve stem hole, 8822. Exhaust valve stem hole, 8823. Exhaust valve stem, 8033. Weld around exhaust valve stem hole, 8030. Around upper cylinder head and lower cylinder Welds at the joints on the outside of the cover. the

Detailed ways

Below, the utility model is described with reference to accompanying drawing. the

In Fig. 1, a top view of a cylinder head of a water-cooled four-cylinder internal combustion engine is shown. When the two camshafts 85 rotate, they drive the opening and closing of the four valves of each cylinder of the four cylinders. The figure shows two kinds of fuel injector holes 750 arranged in different positions. The fuel injector holes 750 of the central direct injection (DI) water-cooled internal combustion engine cylinder head are marked on the left side of the figure, and the fuel injector holes 750 are also marked on the right side of the figure. Given the oblique fuel injector holes 750, one of them can be selected, or used in combination, and the present invention can be applied to both. the

In Fig. 2, fuel is injected into the intake port 887, mixed with air, and then enters the cylinder for combustion through the intake valve. It is only for illustration that there is no fuel injector hole 750 inside the cylinder head, thus omitting the drawings of the cylinder head bolt hole 881 and the upper casing of the cylinder head. the

In FIG. 3 , the upper portion of the upper cylinder head 87 has a bracket for installing the camshaft 85 . The lower cylinder head portion of the lower cylinder head 88 is formed with the spark plug hole 12, the intake valve stem hole 8812, the exhaust valve stem hole 8822, the intake passage 887, the exhaust passage 889, and the oblique fuel injector hole 750, which is the main body. On the upper cylinder head 87, the upper cylinder head portion of the spark plug hole 12, the intake valve stem hole 8812, the exhaust valve stem hole 8822, the intake passage 887, the exhaust passage 889, and the fuel injector hole 750 are formed, which is corresponding to the above-mentioned The through holes of the orifices of each main body of the lower cylinder cover 88 are convenient for mass production to use automatic machine welding. This kind of structure and structure makes the inner cavity of the cylinder head completely exposed to the outside, and each hole, air intake channel and exhaust channel inside the cylinder head can be directly die-cast and core-pulled. It is very difficult to make small water cavities with mud cores. Die-casting can precisely manufacture small, complex, tortuous water cavities that penetrate through various positions inside the cylinder head for a long distance, so as to facilitate the control of water flow. The precise and small water chamber channel formed by die-casting is beneficial to the uniform cooling of the cylinder head. the

In Fig. 4, on the lower cylinder head 88, further, draw the lower cylinder head portion where the cylinder head bolt holes 881 are formed, which is the main body; the upper cylinder head portion where the cylinder head bolt holes 881 are formed on the upper cylinder head 87 is Corresponding to the through hole of the main body of the cylinder head bolt hole 881 on the lower cylinder head 88, it is convenient for mass production to use automatic machine welding. A central direct injection (DI) injector hole 750 is immediately adjacent to the spark plug hole 12 . the

The above-mentioned utility model can be applied to both single-cylinder and multi-cylinder water-cooled internal combustion engine cylinder heads equipped with ignition spark plugs to realize light alloy split die-casting upper and lower body cylinder heads, and then connect the upper and lower bodies by welding to form a whole water-cooled internal combustion engine cylinder equipped with ignition spark plugs build. For automobile engines that urgently need to be lightweight, the above invention is used in light alloy die-casting cylinder heads, which can meet the requirements of further compact design of the engine, obtain more precise, clean, and consistent air intakes, and improve the flow quality of the air entering the cylinders. Fuel mixing is more uniform, the quality of combustion is improved, and it is more energy-saving and environmentally friendly. the

Claims (5)

1. A cylinder head of a water-cooled internal combustion engine, said cylinder head (80) comprising a spark plug hole (12), an intake valve stem hole (8812), an exhaust valve stem hole (8822), an air intake passage (887), Exhaust passage (889), cylinder head bolt hole (881), cylinder head water chamber (83), it is characterized in that: described cylinder head (80) is made up of upper cylinder head (87) and lower cylinder head ( 88) Connection composition, wherein, the spark plug hole (12), the intake valve stem hole (8812), the exhaust valve stem hole (8822), the intake passage (887), the exhaust Road (889) and the cylinder head bolt hole (881) are respectively formed on the upper cylinder head portion of the spark plug hole of the upper cylinder head (87), the upper cylinder head portion of the intake valve stem hole, and the upper cylinder head portion of the exhaust valve stem hole. Cylinder head portion, intake port upper head portion, exhaust port upper head portion, head bolt hole upper head portion, spark plug hole lower head portion formed in the lower head (88), intake valve stem hole The lower cylinder head part, the lower cylinder head part of the exhaust valve rod hole, the lower cylinder head part of the intake port, the lower cylinder head part of the exhaust port, and the lower cylinder head part of the cylinder head bolt hole are connected, and the cylinder head water cavity (83) The welding seam (8030) surrounding the outer joint of the upper cylinder head (87) and the lower cylinder head (88), the welding seam (14) surrounding the spark plug hole (12), and the welding seam surrounding the intake valve stem hole (8812) (8032), weld (8033) around exhaust valve stem hole (8822), weld (8037) around intake (887), weld (8038) around exhaust (889), around cylinder The welding seam (8035) of cover bolt hole (881) connects upper cylinder cover (87) and lower cylinder cover (88) and forms. the 2. The cylinder head according to claim 1, characterized in that: a fuel injector hole (750) is arranged on the cylinder head (80), and the fuel injector hole (750) is formed on the upper cylinder head (87) The fuel injector hole upper cylinder head portion of ) is connected with the fuel injector hole lower cylinder head portion formed in the lower cylinder head (88) via a weld (78) surrounding the fuel injector hole (750). the 3. The cylinder head according to claim 1, characterized in that: there is a bracket for installing the camshaft (85) on the upper cylinder head (87). the 4. A water-cooled internal combustion engine, comprising a body, characterized in that the cylinder head according to any one of claims 1-3 is installed on the body (70). the 5. A mechanical device equipped with a water-cooled internal combustion engine, comprising a body (70), characterized in that: the water-cooled internal combustion engine body (70) of the above-mentioned mechanical device is equipped with a cylinder head as described in any one of claims 1-3. the