An axially movable multi-mode four-bar variable valve drive system

A drive system, mobile technology, applied in engine components, machines/engines, valve details, etc., to achieve high reliability, good variable valve flexibility, and good reliability.

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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  • An axially movable multi-mode four-bar variable valve drive system
  • An axially movable multi-mode four-bar variable valve drive system
  • An axially movable multi-mode four-bar variable valve drive system

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Embodiment Construction

[0039] The invention relates to an axially movable multi-mode four-bar variable valve drive system. It includes a valve drive mechanism 2, a camshaft 3, a camshaft sleeve 4, an axial movement mechanism 5, a valve control mechanism 6, and a valve adjustment mechanism 7. figure 1 It is a schematic diagram of an axially moving multi-mode four-rod variable valve drive system driven by double cams and operated by a single valve. A first cam 401 and a second cam 402 are arranged on the camshaft sleeve 4 . The first cam 401 adopts a single-lobed cam blade or a double-lobed cam blade, the second cam 402 adopts a single-lobed cam blade or a double-lobed cam blade, and the double-lobed cam blades adopt camshafts with the same profile and a phase difference of 180° Two protrusions at the corners. The valve control mechanism 7 has a valve control mechanism input 7a, a valve control mechanism output 7b and a valve control mechanism adjustment terminal 7c. The axial movement mechanism 5 ...

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Abstract

The invention provides an axially-moving multi-mode four-rod variable valve driving system and belongs to the field of engine valve driving. The axially-moving multi-mode four-rod variable valve driving system mainly comprises a cam shaft, a cam shaft sleeve, an axially-moving mechanism, a valve adjustment mechanism, a valve control mechanism and the like. The cam shaft sleeve is at least provided with a first cam and a second cam, and switching between multiple modes such as a two-stroke driving mode, a four-stroke driving mode, a two-stroke brake mode and a four-stroke brake mode of an engine is achieved through the axially-moving mechanism; and furthermore, optimal ventilation of the engine under different work conditions is finally achieved through cooperative use of the axially-moving mechanism and the valve control mechanism, and the purposes of comprehensively improving the power performance, the fuel economy, the emission performance and the brake safety of the engine are achieved. The axially-moving multi-mode four-rod variable valve driving system is provided for the practical application and is high in reliability and compact in structure, the requirements of the system for all the mechanisms are lowered, all the mechanisms adopt relatively mature technologies, and the system is high in practical utilization potential in a short time and has good application prospects.

Description

technical field [0001] The invention relates to an axially movable multi-mode four-rod 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 fi...

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 崔靖晨田华隆武强田江平王阳刘威杨添淏
Owner DALIAN UNIV OF TECH
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