Geometric compression ratio changeable internal combustion engine

A compression ratio, internal combustion engine technology, applied in the direction of internal combustion piston engine, combustion engine, mechanical equipment, etc., can solve the problems of unable to meet actual needs, slow adjustment response performance, complex adjustment mechanism, etc., to achieve simple mechanism, fast response speed, The effect of reducing specific fuel consumption

Pending Publication Date: 2018-05-25
任军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Known variable geometry compression ratio internal combustion engines such as: connecting rod type, gear type, cylinder offset type, hydraulic piston type, etc., their adjustment response performance is slow, the adjustment mechanism is complicated, and the weight is large, which cannot meet the actual needs

Method used

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  • Geometric compression ratio changeable internal combustion engine
  • Geometric compression ratio changeable internal combustion engine
  • Geometric compression ratio changeable internal combustion engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0009] exist figure 1 The closing angle of the middle exhaust valve is α degrees after the top dead center, and the geometric compression ratio

[0010] ε=2R-2r<2R

[0011] exist figure 2 The closing angle of the middle exhaust valve is β degrees before the top dead center, the geometric compression ratio

[0012] ε=2R-2r≤2R

[0013] exist image 3 The closing angle of the middle exhaust valve is γ degrees before the top dead center, the geometric compression ratio

[0014] ε=2R-2r≈2R

[0015] Generally, the intake valve closing angle is slightly adjusted as well.

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Abstract

The invention discloses an engine capable of changing the geometric compression ratio of an internal combustion engine. Adjustment of the compression ratio can be finished within one stroke, only correct timing of an exhaust valve needs to be adjusted, and simplicity, practicability and oil saving are achieved.

Description

Technical field [0001] The present technology relates to an internal combustion engine with a variable geometry compression ratio, which can completely adjust the compression ratio within one stroke. Background technique [0002] The known variable geometry compression ratio internal combustion engines, such as connecting rod type, gear type, cylinder offset type, hydraulic piston type, etc., have slow adjustment response performance, complex adjustment mechanism and heavy weight, which cannot meet actual needs. SUMMARY OF THE INVENTION [0003] In order to achieve the practical requirements of short adjustment time and simple mechanism in the transition process of variable geometric compression ratio. The technical solution of the present invention to solve the problem is to adjust the closing angle of the exhaust valve of the patent ZL201420431180.4, so that the exhaust gas in the cylinder is compressed to change the compression ratio of the connected compression stroke,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D15/00F02D13/02
CPCF02D13/0242F02D15/00Y02T10/12
Inventor 不公告发明人
Owner 任军
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