Multi-mode gas distribution mechanism and control method thereof

Abstract

The invention relates to a multi-mode gas distribution mechanism and a control method thereof, belonging to the field of engine gas distribution mechanisms, variable stroke driving and auxiliary braking. The multi-mode gas distribution mechanism comprises a first shaft sleeve driven by a first camshaft through splines, a second shaft sleeve driven by a second camshaft through the splines, a brakecam, a switching mechanism, a brake rocker arm and the like. The first shaft sleeve is provided with a first intake two-stroke cam, a first intake four-stroke cam, a second intake two-stroke cam, a second intake four-stroke cam and the like, and the second shaft sleeve is provided with a first exhaust two-stroke cam, a first exhaust four-stroke cam, a second exhaust two-stroke cam, a second exhaust four-stroke cam and the like. By controlling the switching mechanism and the brake rocker arm, the gas distribution mechanism provided by the invention can realize flexible switching of multiple modes such as two-stroke drive, four-stroke staged drive, four-stroke staged brake, two-stroke staged brake and the like of the engine, so the power, economy, safety and transportation capability of thevehicle are improved.

Description

technical field [0001] The invention relates to a multi-mode gas distribution mechanism and a control method thereof, belonging to the fields of engine gas distribution mechanism, cylinder deactivation, variable stroke drive and auxiliary braking. Background technique [0002] With the rapid increase of the number of engines, energy and environmental issues as well as traffic safety issues have become one of the major issues restricting my country's sustainable development. Because it can effectively improve engine power output, reduce fuel consumption and emissions, variable stroke drive technology and cylinder deactivation technology have attracted much attention. Engine downsizing (Down-size) and low-speed (Down-speed) have become a recognized development trend of energy saving and emission reduction. When the engine brakes, the smaller the bore and the lower the speed, the worse the braking effect. As the vehicle's own braking ability continues to weaken, freight requi...

AI Technical Summary

Problems solved by technology

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

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