Locking multi-mode lever-type variable valve driving system

A drive system, multi-mode technology, applied in engine components, machine/engine, valve control, etc., to achieve good reliability, high cost performance, and reduced requirements

Inactive Publication Date: 2017-03-29
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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  • Locking multi-mode lever-type variable valve driving system
  • Locking multi-mode lever-type variable valve driving system
  • Locking multi-mode lever-type variable valve driving system

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Embodiment Construction

[0038] The invention relates to a locking multi-mode lever 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 ...

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Abstract

The invention discloses a locking multi-mode lever-type variable valve driving system, belonging to the field of engine valve driving. The variable valve driving system mainly comprises a cam shaft, a mode input mechanism, a mode output mechanism, a mode switching mechanism, a valve regulating lever, a valve control mechanism and the like. By using the mode switching mechanism, the switching among 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, of an engine is realized, further, by matching with the valve control mechanism for use, the optimum ventilation under different working conditions of the engine is finally realized, and the aims of comprehensively improving the engine dynamic property, fuel economy, emission performance and braking security are achieved. The invention is proposed by aiming at practical application, the reliability is high, the structure is compact, the requirements of a system on all the mechanisms are reduced, relatively mature technologies are adopted by all the mechanisms, the practical potential of the system in a short time is high, and the application prospect is good.

Description

technical field [0001] The invention relates to a locking multi-mode lever 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 n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06F01L13/00F01L1/344
CPCF01L1/34413F01L13/00F01L13/0036F01L13/06F01L2710/003F01L2760/00
Inventor 崔靖晨隆武强田华田江平王阳刘威杨添淏
Owner DALIAN UNIV OF TECH
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