CN201381904Y - An eccentric engine block - Google Patents

Abstract

Disclosed is an eccentric engine cylinder body, wherein a center line of a main bearing hole and a center line of a cylinder are off-center in a certain distance delta, the eccentric distance delta=0.1-10 mm, when in work, the center line of a crankshaft deflects to a main thrust surface of a piston, and then, one portion of lateral torque of the piston can be balanced out when the engine works, thereby reducing the friction loss of a cylinder liner of the piston, effectively overcoming shortcomings in the prior art, lowering fuel oil consumption, improving dynamic performance and economy, improving the service span of the diesel engine, and simultaneously lowering the vibration of the diesel engine. The eccentric engine cylinder body is particularly suitable for straight single-cylinder and multi-cylinder diesel engines.

Description

An eccentric engine block

technical field

The utility model relates to a cylinder block of an engine, in particular to an eccentric engine cylinder block.

Background technique

With the technical development of the engine, the requirements for the power, economy, reliability and emission of the engine are becoming more and more stringent. Minimizing the friction loss of the engine is one of the goals pursued by the engine designer. The centerline of the cylinder block of a traditional engine is on the same plane as the centerline of the main bearing hole. For a two-valve engine, due to the eccentricity of the combustion chamber, the explosive pressure generated during gas combustion produces a torque on the piston, causing the piston to generate a lateral thrust. On the one hand, it leads to increased friction loss, and on the other hand, it leads to wear of the piston and cylinder liner, which affects the economy, power, reliability and emission of the diesel engine.

Utility model content

The purpose of this utility model is to provide an eccentric engine cylinder block, which uses a certain distance δ from the center line of the main bearing hole and the center line of the cylinder. Offset the lateral moment of a part of the piston, reduce the friction loss of the piston cylinder liner, and effectively overcome the shortcomings of the above-mentioned prior art.

The utility model provides an eccentric engine cylinder block, which makes up for the deficiency of the traditional cylinder block. It is a cylinder block with a certain distance δ eccentricity between the center line of the main bearing hole and the center line of the cylinder, which can reduce fuel consumption and improve power performance. Economical, improve the life of the diesel engine, while reducing the vibration of the diesel engine. The utility model is especially suitable for in-line single-cylinder and multi-cylinder diesel engines.

Description of drawings

Fig. 1 is a cross-sectional view of a cylinder block of the present utility model.

Fig. 2 is a view rotated along direction A in Fig. 1 .

Detailed ways

The following will be described in conjunction with the embodiments and accompanying drawings, but the protection scope of the present utility model is not limited thereto.

As shown in Figure 1-2, the utility model adopts a certain distance δ between the centerline 3 of the main bearing hole 4 and the centerline 2 of the cylinder 1, δ=0.1-40mm, and when working, the centerline of the crankshaft is biased towards the main thrust of the piston On the one hand, this can offset a part of the lateral moment of the piston when the engine is working, reduce the friction loss of the piston and cylinder liner, reduce fuel consumption, improve power, economy, improve the life of the diesel engine, and reduce the vibration of the diesel engine. Applicable to in-line single-cylinder and multi-cylinder diesel engines.

Claims (2)

1. An eccentric engine cylinder block is characterized in that: the center line (3) of the main bearing hole (4) is eccentric to a certain distance δ from the center line (2) of the cylinder (1). 2. The eccentric engine cylinder block according to claim 1, characterized in that: the eccentric distance δ=0.1-40mm.

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