Lock type multi-mode variable valve driving system

A drive system, multi-mode technology, applied in valve drive devices, engine components, machines/engines, etc., to achieve the effect of good variable valve flexibility, optimized operating conditions, and improved power performance

Inactive Publication Date: 2017-07-14
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no variable valve drive system that can meet the above requirements a

Method used

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  • Lock type multi-mode variable valve driving system
  • Lock type multi-mode variable valve driving system
  • Lock type multi-mode variable valve driving system

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Embodiment Construction

[0040] The invention relates to a locking multi-mode variable valve drive system. The opening timing of the intake / exhaust valves in various modes is very different, which requires a very large angle of phase adjustment when switching between various modes. The current common vane-type VVT ​​mechanism cannot meet the requirements, but can meet the requirements The electric VVT mechanism is expensive and cannot be widely used in the short term; another example is that the opening duration of the intake / exhaust valves varies greatly in various modes. If a mechanical continuously variable valve control mechanism is used alone to achieve a small opening duration Otherwise, the maximum lift of the valve will be very small, and it is difficult to meet the indicators such as inflation efficiency and pumping loss at the same time. If the hydraulic valve control mechanism is used alone to achieve it through oil drainage, the system of the hydraulic valve control mechanism at high speed ...

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Abstract

The invention discloses a lock type multi-mode variable valve driving system and belongs to the field of engine valve drive. The lock type multi-mode variable valve driving system mainly comprises a cam shaft, a mode input mechanism, a mode output mechanism, a mode switching mechanism, a valve adjusting mechanism, a valve control mechanism and the like. A two-stroke drive mode, a four-stroke drive mode, a two-stroke brake mode, a four-stroke brake mode and the like of an engine are switched by using the mode switching mechanism, optimal air exchange of the engine in different working conditions is finally achieved further due to the fact that the mode switching mechanism is cooperated with the valve control mechanism for use, and the purpose of comprehensively improving engine dynamic property, fuel economy, emission performance and brake safety is achieved. The lock type multi-mode variable valve driving system is provided for practical application, is high in reliability and compact in structure, the requirements of the system for all the mechanisms are lowered, the mechanisms adopt mature technology, and the system is high in practical potential in a short period and has the good application prospect.

Description

technical field [0001] The invention relates to a locking multi-mode variable valve driving system, which belongs to the field of engine valve driving. Background technique [0002] With the increasingly serious energy and environmental issues, and people's focus on driving and safety of vehicles, future engines need to comprehensively consider power, economy, emissions and safety on the premise of meeting emission standards. This requires optimizing engine performance over the full range of driving and braking conditions. At present, technologies such as variable valve, variable stroke number, cylinder deactivation, auxiliary braking, new combustion mode, variable compression ratio, variable EGR and other technologies that have attracted much attention only affect the performance of the engine in a small range of operating conditions. Make improvements. For example, the existing variable valve technology is only applied to the driving condition of the fixed stroke number ...

Claims

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Application Information

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IPC IPC(8): F01L1/344F01L13/06F01L13/00F01L1/08
CPCF01L1/344F01L1/08F01L13/0036F01L13/06
Inventor 崔靖晨田华隆武强田江平王阳刘威杨添淏
Owner DALIAN UNIV OF TECH
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