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Engine cylinder

An engine block, overall structure technology, applied in engine components, machines/engines, cylinders, etc.

Active Publication Date: 2009-05-27
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the method of increasing the wall thickness and reinforcing ribs at the weak structure was mainly used to solve the modal problem, but it was contradictory to the continuous weight reduction requirements of the engine. What method should be adopted to achieve the weight, structural strength and modal The optimal balance point constitutes a difficulty in engine design

Method used

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Embodiment Construction

[0016] Such as Figure 1 to Figure 3 As shown: the reinforcement rib 2 and the reinforcement rib 3 are connected by the rear end flange 4 and the curved convex surface structure 1 to form a whole, the back of the rear end surface is hollowed out in the convex structure area, and a weight-reducing concave is set on the joint surface of the cylinder body. 5. The hollowing out of the rear end surface and the weight-reducing pit 5 jointly play the role of reducing weight. The entire formed overall structure can greatly improve the strength of the connection between the rear end face of the cylinder body and the gearbox and its own natural frequency without much increase in weight, which meets the design requirements. It uses the least amount of material and the most optimized structure but meets high strength and high natural frequency, greatly saves material, and improves the economy and NVH characteristics of the engine.

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Abstract

The invention relates to an engine block, which comprises a rear end face flange. A convex hull face structure and reinforcing ribs are arranged on the rear end face flange. The reinforcing ribs, the rear end face flange and a crankcase are connected into an integral structure by the convex hull face structure, and a part with the reinforcing ribs and the convex hull face structure on the flange face of the block are hollowed out. Through CAE structural strength analysis and NVH property analysis, the structural design can greatly improve the properties of the two, and meet the requirements on light weight design, high power per liter, structural strength and NVH.

Description

technical field [0001] The invention relates to an engine block, in particular to a rib structure of the engine block. Background technique [0002] Now, as the power and torque of the engine continue to increase, the structural strength of the engine and the problems of noise and vibration are particularly prominent. In order to improve the strength of the cylinder block, many existing designs adopt methods of increasing the wall thickness of the cylinder block and reinforcing ribs, but this is also Will increase the volume and weight of the engine block. [0003] The structural strength and natural frequency (mode) of the engine are the necessary guarantees for the reliability and performance of the engine. The requirements for the structural strength and mode of the engine are to adapt to high power per liter (now some engines have more than 100KW / L per liter power), high torque requirements. In the past, the method of increasing the wall thickness and reinforcing ribs ...

Claims

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Application Information

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IPC IPC(8): F02F1/00
Inventor 朱友贵
Owner CHERY AUTOMOBILE CO LTD