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Axial moving type multi-mode variable valve drive system

A drive system, mobile technology, applied in the direction of engine components, machine/engine, valve control, etc., to achieve good reliability, lower requirements, and compact mechanism

Inactive Publication Date: 2017-07-21
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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  • Axial moving type multi-mode variable valve drive system
  • Axial moving type multi-mode variable valve drive system
  • Axial moving type multi-mode variable valve drive system

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Embodiment Construction

[0041] The invention relates to an axially movable multi-mode 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 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 adjusts the axial ...

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Abstract

The invention relates to an axial moving type multi-mode variable valve drive system, and belongs to the field of engine valve drive. The axial moving type multi-mode variable valve drive system mainly comprises a cam shaft, a cam shaft sleeve, an axial moving mechanism, a valve adjusting mechanism, a valve control mechanism and the like. The cam shaft sleeve is at least provided with a first cam and a second cam. Through usage of the axial moving mechanism, conversion among multiple modes of the engine two-stroke drive mode, the four-stroke drive mode, the two-stroke braking mode, the four-stroke braking mode and the like is achieved. Through further cooperated usage of the axial moving type multi-mode variable valve drive system and the valve control mechanism, optimal air exchange of the engine under different work conditions is finally achieved, and the purposes of comprehensively improving the dynamic property, fuel economical efficiency, emission performance and braking safety of the engine are achieved. The axial moving type multi-mode variable valve drive system is provided for actual application and is high in reliability and compact in mechanism, the requirement of the system for various mechanisms is lowered, the mature technology is adopted in the mechanisms, the practical potential of the system within the short period is high, and good application prospects are achieved.

Description

technical field [0001] The invention relates to an axially movable multi-mode variable valve drive system, which belongs to the field of engine valve drive. 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 nu...

Claims

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Application Information

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IPC IPC(8): F01L13/06F01L13/00F01L1/344
CPCF01L1/34413F01L13/00F01L13/0036F01L13/06F01L2013/0052F01L2710/003F01L2760/00
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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