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Variable compression ratio engines

A compression ratio, engine technology, applied in engine control, combustion engine, machine/engine, etc., can solve uncontrollable problems

Inactive Publication Date: 2008-12-31
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application No. 88101975.5 discloses a variable compression ratio device for variable connecting rod length of internal combustion engine. Ratio changes, which are reflected between several strokes of the internal combustion engine, and are uncontrollable, and cannot provide flexible fuel engines with compression ratios that adapt to different fuels

Method used

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  • Variable compression ratio engines
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Embodiment Construction

[0014] Such as figure 1 , 2 As shown, a variable compression ratio engine includes a cylinder head and a cylinder block 1, a crankcase and a power output shaft 12. The cylinder head is fixed on the cylinder block 1 , and the crankcase is integrally formed with the cylinder block 1 . Inside the cylinder 1 , a piston 2 is connected to a crankshaft 9 via a connecting rod 3 . The power output shaft 12 is installed on the crankcase, and the crank journal of the power output shaft 12 and the crankshaft 9 has a power output gear 11 and an input gear 10 respectively. The power output gear 11 meshes with the input gear 10 . There is also a support arm 4 in the crankcase, the crankshaft 9 is installed on the support arm 4, one end of the support arm 4 is hinged with the cylinder block 1, and the hinge shaft of the hinge is the power output shaft 12, and the other end As the control end, the support arm 4 can be rotated around the power output shaft 12 through a control mechanism.

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Abstract

The invention discloses a variable compression-ratio engine which comprises a cylinder cover, a cylinder body, a power output shaft and a crankcase. The cylinder cover is fixed on the upper surface of the cylinder body; the crankcase and the cylinder body are formed integrally. In the cylinder body, a piston is connected with the crankcase through a connecting rod. The power output shaft is mounted on the crankshaft; the power output shaft and the crank neck of the crank are respectively provided with a power output gear and an input gear; the power output gear is meshed with the input gear. A support arm is arranged in the crankcase; the crank is hinged with the support arm. One end of the support arm is hinged with the crankcase and the hinged shaft is the power output shaft. The other end of the support arm is the control end; the control end is connected with a control mechanism which drives the support arm to rotate around the power output shaft. Because the control mechanism is adopted for controlling the displacement of the control end of the support arm, the compression-ratio of the engine is ensured to be consistent with the operating condition of the engine, so as to improve the efficiency and reduce the exhaust.

Description

technical field [0001] The invention relates to the field of engines, in particular to an automobile engine whose compression ratio is variable and controllable. Background technique [0002] At present, the compression ratio of most engines cannot be changed. However, in order to reduce fuel consumption, improve engine performance and reduce emissions under different working conditions, the compression ratio must be flexibly changed according to different working conditions. At the same time, the compression ratio of the current flexible fuel engine is fixed, which cannot adapt to the combustion characteristics of different fuels at the same time. After the fuel is changed, the thermal efficiency is reduced, and abnormal combustion phenomena such as knocking are prone to occur; changing fuel during driving can also easily lead to abnormal phenomena such as unstable engine operation. Therefore, the variable compression ratio engine has become a new direction of current rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D15/02
CPCF02B75/047F02D15/02Y02T10/12
Inventor 熊志江卢能才
Owner CHERY AUTOMOBILE CO LTD
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