Method for improving low-speed performance of multi-cylinder engine

A multi-cylinder engine and engine technology, applied in engine components, engine control, machine/engine and other directions, can solve the problems of inability to open the engine valve, difficult engine cold start, high fuel consumption, etc., to eliminate cylinder pressure, reduce Emission and fuel consumption reduction effect

Active Publication Date: 2015-03-18
SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for improving the low-speed performance of a multi-cylinder engine, to solve the technical problems in the prior art that the engine consumes a lot of fuel when idling, the vibration and noise are large when the engine is stopped, and the cold start of the engine is difficult. Technical problem of not being able to keep the engine valves open after the engine is turned off

Method used

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  • Method for improving low-speed performance of multi-cylinder engine
  • Method for improving low-speed performance of multi-cylinder engine
  • Method for improving low-speed performance of multi-cylinder engine

Examples

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Embodiment 1

[0031] figure 1 , figure 2 , image 3 and Figure 4 Used to describe Example 1.

[0032] figure 1 and figure 2 It is described that the first embodiment of the present invention is in a non-operating state and an operating state respectively, wherein the fixed chain mechanism 100 includes a box body 210, a driving mechanism and a carrying mechanism. The casing 210 contains a driving piston hole 260 and a working piston hole 190 , and fluid passages 214 and 168 , which are perpendicular to each other and pass through each other. The drive mechanism includes a drive piston 164 and a drive spring 156 . The driving piston 164 is arranged in the driving piston hole 260 in the box body 210, the left and right ends of the driving piston hole 260 have stop surfaces 158 and 246 respectively, and the driving spring 156 is arranged at one end of the driving piston 164 (the left end in the figure), The other end of the driving piston 164 (the right end in the figure) is close to ...

Embodiment 2

[0038] Figure 5 and Figure 6 Used to describe Example 2.

Embodiment 2

[0039] Embodiment 2 is a continuous motion fixed chain mechanism 100 with a valve gap adjustment function, including a box body 210, a piston linkage mechanism and a valve gap adjustment mechanism. The casing 210 contains a driving piston hole 260 and a working piston hole 190 , fluid channels 214 and 168 , and a discharge channel 169 which are perpendicular to each other. The piston linkage includes an upper link 184 and a lower link 186 , a drive piston 164 and a working piston 160 . The drive piston 164 is seated in the drive piston bore 260 and the working piston 160 is seated in the working piston bore 190 . The driving piston 164 has a guide groove 137 . One end (the left end among the figures) of the driving piston 164 has a horizontal hole 183 that communicates with the guide groove 137, and a rolling ball 162 (also a piston) is arranged in the horizontal hole 183. The other end (the right end in the figure) of the driving piston 164 is provided with a spring 156 . ...

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Abstract

The invention relates to a method for improving low-speed performance of a multi-cylinder engine. The method comprises a process of keeping an engine valve open in constant by using a solid-chained mechanism. In the first predetermined engine speed, a working piston of the solid-chained mechanism is placed on the operating position, forming the mechanical link with the engine valve, keeping the opened engine valve from closing; and in the first predetermined engine speed or the lower engine speed including zero, keeping the engine valve open in constant. Before the engine start and during the start, the working piston of the solid-chained mechanism keeps the engine valve open in constant sequentially, until the engine speed is increased from zero to the second predetermined engine speed, the working piston is switched from the operating position to the non-operating position, and cancelling the effect on the engine valve. The method uses the novel method and mechanism, and is capable of keeping an inlet valve or an exhaust valve of the engine open in constant, improving the parking, starting and idling performance of the engine, and reducing the fuel consumption and discharge of the engine.

Description

Technical field: [0001] The invention relates to the mechanical field, in particular to vehicle engine technology, in particular to a method for improving the low-speed performance of a multi-cylinder engine. Background technique: [0002] The low-speed performance of the engine mainly includes the engine's parking, starting and idling performance. Although engine hardware and software have been greatly improved, such as new technologies such as engine heating during cold start, compression ignition diesel engines are still difficult to start in cold weather. Large commercial vehicle engines also have defects such as fuel consumption, instability, vibration and noise when idling and parking. Most of the auxiliary valve drive mechanisms currently used to improve engine performance are hydraulic mechanisms. After the engine is turned off, the hydraulic mechanism cannot keep the engine valves open. The leakage of fluid (such as engine oil) will cause the failure of the hydra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D13/02F01L13/08
Inventor 杨洲奚勇奚正
Owner SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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