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A lock-type multi-mode four-bar variable valve drive system

A drive system, multi-mode technology, applied in the direction of engine components, machines/engines, valve details, etc., to achieve the effects of good reliability, rational design, and improved possibility of practicality

Inactive Publication Date: 2019-04-09
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 at the same time, so the development of a multi-mode variable valve drive system is imminent

Method used

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  • A lock-type multi-mode four-bar variable valve drive system
  • A lock-type multi-mode four-bar variable valve drive system
  • A lock-type multi-mode four-bar variable valve drive system

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Embodiment Construction

[0038] The invention relates to a locking multi-mode four-bar 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 hi...

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Abstract

The invention relates to a locking-type multi-mode four-rod variable valve driving system, and belongs to the field of engine valve driving. The locking-type multi-mode four-rod variable valve driving system mainly comprises a camshaft, a mode input mechanism, a mode output mechanism, a mode switching mechanism, a valve adjusting mechanism, a valve control mechanism and the like. By the adoption of the mode switching mechanism, an engine can be switched between multiple modes including a two-stroke driving mode, a four-stroke driving mode, a two-stroke braking mode, a four-stroke braking mode and the like. Furthermore, due to the fact that the mode switching mechanism and the valve control mechanism are matched for use, optimal ventilation of the engine under different working conditions is realized ultimately, and the purpose of comprehensively improving the engine dynamic property, fuel economy, emission performance and braking safety is achieved. The locking-type multi-mode four-rod variable valve driving system is put forward oriented to practical applications, reliability is high, the structure is compact, the requirements for all the mechanisms by the system are lowered, mature technologies are adopted in all the mechanisms, the practical potential of the system in the short term is high, and the application prospects are good.

Description

technical field [0001] The invention relates to a locking multi-mode four-bar 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 under 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 st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/06F01L13/00F01L1/344
CPCF01L1/34413F01L13/00F01L13/0036F01L13/06F01L2710/003F01L2760/00
Inventor 崔靖晨田华隆武强冯立岩王阳刘威杨添淏
Owner DALIAN UNIV OF TECH
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