CN203441615U - Cylinder block and cylinder head connecting structure of automobile engine - Google Patents

Abstract

The utility model relates to a cylinder block and cylinder head connecting structure of an automobile engine. The cylinder block and cylinder head connecting structure comprises a cylinder block with a water sleeve, a cylinder head, a cylinder gasket and a cylinder head bolt, and is characterized in that the cylinder gasket is arranged at the sealing position where the cylinder block is connected with the cylinder head, and a cylinder block threaded hole, connected with the cylinder head bolt, on the cylinder block is extended to the position of the lower end of the bottom of the water sleeve of the cylinder block. According to the cylinder block and cylinder head connecting structure, a cylinder block, a cylinder head and a cylinder head bolt of an existing engine are adopted, the cylinder head bolt is lengthened, meanwhile, the corresponding cylinder block threaded hole is lengthened, the cylinder head bolt is screwed to the position, with high rigidity, at the lower end of the bottom of the water sleeve of the cylinder block, and screwing deformation of the cylinder hole is accordingly reduced. The cylinder block and cylinder head connecting structure further has the advantages of being simple and reasonable in structure, long in service life, safe, reliable, wide in application scope and the like.

Description

A connection structure between a cylinder block and a cylinder head of an automobile engine

technical field

The utility model belongs to the technical field of automobile engines, in particular to a connection structure between a cylinder block and a cylinder head of an automobile engine.

Background technique

At present, in order to reduce the friction loss of engine operation, low-tension piston rings are adopted, resulting in an increase in oil consumption. The main reason is that after the tension is reduced, the followability of the piston ring to the cylinder bore is also reduced, and the cylinder bore is deformed due to thermal deformation and the influence of the tightening force of the cylinder head bolts. Compared with the two, the deformation of thermal deformation is relatively small, and the deformation of tightening is larger. In the past, when the engine cylinder head bolts were tightened to the cylinder block, they were tightened to the upper part of the cylinder block, so that the stress of the threaded part of the cylinder head bolts would be transmitted to the cylinder bore through the upper wall of the cylinder block, resulting in increased deformation of the cylinder bore, so How to suppress the tightening deformation is the key to reducing oil consumption and air leakage.

Contents of the invention

The purpose of the utility model is to provide a connection structure between an automobile engine cylinder block and a cylinder head which reduces the deformation of the cylinder bore.

The purpose of this utility model is achieved in that it includes a cylinder block with a water jacket, a cylinder head, a cylinder gasket, and cylinder head bolts, and it is characterized in that: the cylinder gasket is arranged at the sealing position where the cylinder body and the cylinder head are connected On the cylinder block, the depth of the cylinder block threaded hole used to connect the cylinder head bolts extends to the lower end of the bottom of the cylinder block water jacket.

Specifically, the depth of the threaded hole of the cylinder block extends to a position with high rigidity at the lower end of the water jacket bottom of the cylinder block, so as to suppress tightening deformation and reduce oil consumption and air leakage.

The utility model utilizes the existing engine cylinder block, cylinder head, and cylinder head bolts to extend the cylinder head bolts, and at the same time, the corresponding cylinder block threaded holes are also extended, so that the cylinder head bolts are tightened to the lower end of the cylinder block water jacket with high rigidity. position, thereby reducing the tightening deformation of the cylinder bore.

The technical solution adopted by the utility model includes designing an elongated cylinder head bolt and a cylinder block corresponding to an extended threaded hole, and the elongated cylinder head bolt securely fixes the cylinder head and the cylinder block together.

The new model also has the advantages of simple and reasonable structure, long service life, safety and reliability, and wide application range.

Description of drawings

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

Fig. 2 is a schematic diagram of a cross-sectional structure along B-B in Fig. 1;

Fig. 3 is a schematic diagram of the cross-sectional structure along the line A-A in Fig. 1 .

Explanation of the symbols of the main parts of the drawings

1- cylinder head, 2- cylinder block, 3- cylinder gasket, 4- cylinder head bolts, 5- cylinder block water jacket.

The utility model will be described in further detail below in conjunction with the accompanying drawings by examples, but the following example is only an example of the utility model, and does not represent the limited scope of protection of the utility model, the scope of protection of the utility model The claims shall prevail.

Detailed ways

Example 1

As shown in Figures 1 to 3, 1 in the figure is the cylinder head, 2 is the cylinder block, 3 is the cylinder gasket, 4 is the cylinder head bolt, and 5 is the water jacket of the cylinder block; the cylinder gasket 3 is arranged between the cylinder block 2 and At the sealing position where the cylinder head 1 is connected, the depth of the cylinder block threaded hole used to connect the cylinder head bolt 4 on the cylinder block 2 extends to a position with high rigidity at the lower end of the bottom of the cylinder block water jacket 5 .

The utility model has a simple structure, and through installation tests: the engine oil consumption is significantly reduced in the range of 3000-4000 rpm, and the effect is slightly better in other speed ranges; the reduction effect of air leakage is better in the range of 2000-4500 rpm.

Claims (2)

1. the linkage structure of an automobile engine cylinder body and cylinder cap, it comprises the cylinder block with water jacket, cylinder head, head gasket, cylinder head bolt, it is characterized in that: described head gasket is arranged on the sealing station that cylinder block is connected with cylinder head, in cylinder block, for connecting the cylinder block tapped hole degree of depth of cylinder head bolt, extend to the position of lower end, block jacket bottom.

2. a linkage structure for automobile engine cylinder body and cylinder cap, is characterized in that: the described cylinder block tapped hole degree of depth extends on the position that lower end, block jacket bottom rigidity is high.

Images