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Compact multi-mode valve driving system

A drive system, multi-mode technology, applied in the direction of engine components, machines/engines, non-mechanically actuated valves, etc., can solve the problems that cannot satisfy multi-mode engines, achieve good application prospects, high power output, and wide application range Effect

Active Publication Date: 2017-08-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since most of the existing practical variable valve drive systems are used in four-stroke drive mode engines and cannot meet the requirements of multi-mode engines, a valve drive system with high reliability, simple and compact structure, and meeting the requirements of multi-mode engines is developed imperative

Method used

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  • Compact multi-mode valve driving system

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Embodiment Construction

[0042] The invention relates to a compact multi-mode valve drive system, which includes an exhaust valve assembly and an intake valve assembly. It also includes a first camshaft 101 provided with a sleeve 2, a second camshaft 102 provided with an exhaust brake cam 201, a rocker arm, a rocker arm fulcrum, an intake valve bridge 503, a switching assembly, and a brake switch 703 and brake switch return spring 73K. The sleeve 2 is provided with at least an intake four-stroke cam 251, an intake two-stroke cam 252, an exhaust four-stroke cam 261, an exhaust two-stroke cam 262, a first switching groove 271 and a second switching groove 272, and the rocker arm is at least It includes an intake rocker arm 301 and an exhaust main rocker arm 302. The rocker arm fulcrum includes at least an intake rocker arm fulcrum 401 and an exhaust main rocker arm fulcrum 402. The switching components include a first switching component 701 and a second switching component 702. The intake rocker arm 30...

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Abstract

The invention discloses a compact multi-mode valve driving system and belongs to the field of engine valve driving, stroke changing and auxiliary braking. The compact multi-mode valve driving system comprises a first cam shaft provided with a shaft sleeve, a second cam shaft provided with an exhaust braking cam, switching assemblies, a braking switch and the like. The shaft sleeve is provided with an intake four-stroke cam, an intake two-stroke cam, an exhaust four-stroke cam, an exhaust two-stroke cam and two switching grooves. The axial position of the shaft sleeve is controlled through the two switching assemblies, and two-stroke and four-stroke seamless switching is achieved; and the driving modes and the braking modes are switched through only one braking switch. By means of the compact multi-mode valve driving system, the four modes including the four-stroke driving mode, the two-stroke driving mode, the four-stroke braking mode and the two-stroke braking mode are flexibly switched, and high-power, low-oil-consumption, low-emission and efficient graded braking is achieved. The compact multi-mode valve driving system is simple and compact in structure, high in reliability, low in cost and high in response speed.

Description

Technical field [0001] The invention relates to a compact multi-mode valve drive system, belonging to the field of valve drive, variable stroke and auxiliary braking. Background technique [0002] With the rapid increase in the number of engines, energy and environmental issues and driving safety issues have become one of the major issues restricting the sustainable development of our country. Because it can effectively increase engine power output, reduce fuel consumption and emissions, variable stroke technology has attracted much attention. Engine downsizing (Down-size) and low-speed (Down-speed) have become recognized development trends in energy conservation and emission reduction. When the engine is braking, the smaller the cylinder diameter and the lower the speed, the worse the braking effect. Under the background that the vehicle's own braking ability is constantly weakening, vehicle safety is getting more and more attention, and more and more countries have listed the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06F01L1/26F01L9/02F01L1/24F01L1/18F01L9/10F01L9/14
CPCF01L1/18F01L1/24F01L1/26F01L13/06F01L9/14F01L2013/0052
Inventor 崔靖晨隆武强王阳冯立岩田华刘威
Owner DALIAN UNIV OF TECH
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