Method for increasing temperature of aftertreatment system of compression-release type engine and engine
A system temperature, engine technology, applied in engine components, engine control, machine/engine and other directions, can solve problems such as cost increase, and achieve the effect of increasing temperature, realizing temperature, and increasing gas temperature
Pending Publication Date: 2020-12-11
WEICHAI POWER CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a method for increasing the temperature of the aftertreatment system of a compression release engine and the engine, so as to solve the technical problem in the prior art that a set of hydraulic mechanism is added to increase the temperature of the aftertreatment system, resulting in increased cost
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[0019] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.
[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship betw...
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The invention relates to the technical field of engines, in particular to a method for increasing the temperature of an aftertreatment system of a compression-release type engine and an engine. The method comprises the steps that when a control unit judges that the temperature of the aftertreatment system needs to be increased, a brake electromagnetic valve is controlled to be opened, meanwhile, afuel gas supply system is controlled not to stop injecting fuel gas, and an ignition system is controlled to ignite before the top dead center of the compression stroke. In this way, mixed gas of airand fuel gas is still sucked in in the air input stroke, the combustible mixed gas is ignited by the ignition system to generate high-temperature gas before the top dead center of the compression stroke, the generated high-temperature gas can be exhausted into the aftertreatment system through an opened exhausting valve at the top dead center of the compression stroke, and therefore the temperature of the aftertreatment system is rapidly increased. By means of the method, the temperature of the aftertreatment system can be increased without adding other mechanisms, and the cost is low.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to a method for increasing the temperature of an aftertreatment system of a compression release engine and the engine. Background technique [0002] The post-processing system of the gas engine needs a certain temperature to have sufficient conversion efficiency. At present, the variable valve timing technology is often used to increase the temperature of the after-treatment system of the gas engine, that is, by installing a set of hydraulic fluid at the transmission end of the camshaft. Force mechanism, so as to realize the angle adjustment of the camshaft within a certain range, which is equivalent to adjusting the opening and closing timing of the valve, or advancing, lagging, or keeping it unchanged. The disadvantage of the prior art is that a hydraulic mechanism needs to be added, which increases the cost of the product. Contents of the invention [0003] The purpose of the ...
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IPC IPC(8): F02D43/00
CPCF02D41/0245F02D41/0002F02D41/0027F02D41/3005F02D37/02F01N2430/00
Inventor 李勤王飞韩雨许成
Owner WEICHAI POWER CO LTD