Combined tail gas collection system for multi-cylinder engine and control method thereof

Abstract

The invention discloses a combined tail gas collection system for a multi-cylinder engine and a control method thereof, relating to a device capable of being rapidly switched and used for independently collecting and analyzing the tail gas of each cylinder and each exhaust stage. The device mainly comprises a combined tail gas acquisition device, a cooling water jacket, an air compressor, a pressure gage, a high-temperature temperature sensor and a header, an air-fuel ratio analyzer, a tail gas analyzer, a tail gas carbon black granule analyzer, a waste gas collector, a solenoid valve and thelike. The invention has the advantage that a set of tail gas collecting and analyzing device can be applied to collecting and analyzing the tail gas of each cylinder and each working condition of themulti-cylinder engine rapidly, conveniently and accurately. The device is simple in structural design and easy to manufacture and operate, and is favorable for reducing equipment purchase and application cost; meanwhile, the system also has favorable adaptability and expansibility and can be used for butt joint with different models of engines very conveniently. The system and the control method thereof in the invention can be used for exhaust laboratories of engine manufacturing plants and also for laboratories and the like in universities and colleges as well as scientific research institutions, and has a wide market prospect and better economic benefits.

Description

technical field [0001] The invention provides a multi-cylinder engine tail gas joint collection device, in particular to the collection and analysis of different cylinders and different combustion components of the multi-cylinder engine and the tail gas before and after aftertreatment. The purpose of the present invention is to realize the convenient and rapid switching, collection and comparative analysis of the exhaust gas of each cylinder of a multi-cylinder engine by using a set of exhaust gas collection and analysis device within one measurement cycle, and at the same time, it can also collect and compare the exhaust gas before and after the exhaust gas post-treatment and analyze. Background technique [0002] With the rapid growth of the number of motor vehicles, oil consumption is increasing year by year, and the tail gas emitted by motor vehicles has caused serious air pollution. In order to more accurately collect and detect engine exhaust emissions and make them m...

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Problems solved by technology

[0003] However, the current exhaust gas collection device can only collect the exhaust gas from the exhaust manifold or a single cylinder through the collection probe, and the collection probe generally adopts a hard connection such as a screw; when the engine is running, the temperature of the exhaust pipe is very high. This exhaust gas collection method is difficult to quickly switch between different collection parts

With the deepening of research on mixed fuel engines, it has become one of the main research methods to study the combustion characteristics of fuels by burning different components and proportions of fuels in different cylinders. Therefore, it is necessary to collect and measure the exhaust gas of different cylinders of the engine separately; and the use of multiple devices for collection not only increases the difficulty of layout and installation, but also leads to a substantial increase in cost

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