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An Engine Motion Structure with Variable Compression Ratio

A technology of motion structure and compression ratio, applied in engine control, machine/engine, mechanical equipment, etc., can solve problems such as gear device wear, worm device deformation, ablation, etc., and achieve reduced energy loss, high reliability, and motion structure simple effect

Active Publication Date: 2022-03-18
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this patent is: the cylinder head is a part that withstands high temperature and high pressure, and the worm device may be deformed, ablated, stuck, etc. due to high temperature and high pressure, and its reliability is not high
The disadvantage of this patent is: frequent changes in the engine compression ratio will cause wear of the gear device, and the reliability is not high
The disadvantages of this patent are: the processing of the eccentric camshaft is complicated, the cost is high, and the energy consumption required for the relative movement between the crankcase and the cylinder block is high

Method used

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  • An Engine Motion Structure with Variable Compression Ratio
  • An Engine Motion Structure with Variable Compression Ratio
  • An Engine Motion Structure with Variable Compression Ratio

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 -The variable compression ratio engine kinematic structure shown in 5, comprises cylinder, and cylinder comprises cylinder housing 10 and the cylinder head 11 that is fixed on cylinder housing 10 tops, intake camshaft 1 and exhaust camshaft 2 are arranged in parallel on the top of the cylinder head 11, and the piston 3 is arranged in the cylinder housing 10.

[0027] The piston 3 is connected with a cross-bar sleeve mechanism that can move up and down with it: it includes a guide sleeve 12 that is coaxially sleeved on the cylinder housing 10, moves up and down along the cylinder housing 10 axis, and a diameter along the guide sleeve 12. To the cross bar 13 fixed on the bottom of the guide sleeve 12, a piston rod 14 is connected between the piston 3 and the cross bar 13, and the top and bottom ends of the pisto...

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Abstract

The invention discloses an engine motion structure with variable compression ratio, which comprises a cylinder, an intake camshaft and an exhaust camshaft arranged in parallel on the cylinder, a piston that can move up and down is arranged in the cylinder, and the piston is fixedly connected with a Its cross-bar sleeve mechanism moves up and down. The cross-bar sleeve mechanism is hingedly connected with a connecting rod. The top of the connecting rod is hingedly connected with a motion conversion mechanism that can convert linear motion into rotary motion. The power output end of the motion conversion mechanism is fixed with a The gear shaft parallel to the intake camshaft and the exhaust camshaft is rotationally connected with the intake camshaft and the exhaust camshaft through a gear transmission mechanism. The gear shaft is arranged in a trapezoidal slider whose top surface is an inclined plane. The cylinder is provided with a wedge-shaped block that cooperates with the trapezoidal slide block and has a sloped bottom surface. A slide block guide groove for the trapezoidal slide block to move up and down and a wedge-shaped block guide groove for the wedge-shaped block to move left and right are provided in the cylinder. The compression ratio of the engine is adjustable, the movement structure is simple, stable and reliable, and the energy consumption is low.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine motion structure with variable compression ratio. Background technique [0002] The engine compression ratio is the ratio of the maximum stroke volume of the piston to the minimum stroke volume, and its calculation formula is: compression ratio = V1 / V2. As far as a certain cylinder of the engine is concerned, when the stroke of the piston reaches the lowest point, the position of the piston at this time is called the bottom dead center, and the volume in the combustion chamber of the cylinder is the maximum stroke volume V1. When the piston moves in the opposite direction, it reaches the highest point position , the position of the piston at this time is called the top dead center, the volume of the combustion chamber is the smallest in the entire piston stroke, and the volume is V2. The compression ratio of a general engine cannot be changed, because the volume of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D15/02F02B75/04F02B75/32
CPCF02D15/02F02B75/04F02B75/32
Inventor 章帅韬
Owner DONGFENG MOTOR CORP HUBEI
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