Control system and strategy for adding hydrogen peroxide to fuel oil
A control system, hydrogen peroxide technology, applied in the direction of adding non-fuel substances to fuel, charging system, combustion engine, etc., can solve the problems of reducing NOx, deterioration of fuel economy, reducing oxygen concentration in intake pipe, etc., to promote mixing, increase Effects of chance of collision and contact
Inactive Publication Date: 2015-07-08
JILIN UNIV
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Problems solved by technology
EGR is to return part of the exhaust gas to the intake pipe to participate in combustion again. The return of exhaust gas reduces the oxygen concentration in the intake pipe. While reducing NOx, the reduction of air-fuel ratio will increase the emission of PM in the exhaust and cause worsening fuel economy
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example 1
[0042] Example 1: If Figure 4 shown
[0043] (1) Collect the speed and torque signals of the diesel engine, such as the speed is 1650r / min and the torque is 700N (50% load), and send it to the control unit of the diesel engine.
[0044] (2) Under the working condition of diesel engine 1650r / min, 50% load, according to the rotating speed of diesel engine, the torque setting limit value of NOx (600ppm) and smoke (1%) in the diesel exhaust emission.
[0045] (3) Deriving the mapping relationship between NOx discharge and hydrogen peroxide ratio according to the basic test data in this working condition, so as to determine the opening degree (20%) of the solenoid valve (6).
[0046] (4) Collect the NOx and smoke signals in the exhaust gas through the NOx sensor and the smoke meter. If the NOx exceeds 600ppm and the smoke exceeds 1%, then increase the opening of the solenoid valve and increase the ratio of hydrogen peroxide to reduce the NOx to 600ppm Below, if the smoke level i...
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The invention provides a control system for adding hydrogen peroxide to fuel oil. The system comprises a diesel engine (1), an exhaust pipe (2), a fuel oil nozzle (4), an ECU (5), a fuel oil box (11) and a high-pressure common rail. The system is characterized by further comprising a hydrogen peroxide storing box (7) and a control system, wherein the hydrogen peroxide storing box (7) is connected to a fuel oil pipeline (10) through a solenoid valve (13) and a hydrogen peroxide flow meter (16) in a sequence; an NOx sensor (3) and a smoke meter (19) are respectively connected to the exhaust pipe (2); signals acquired by the NOx sensor (3) and the smoke meter (19) are fed back to the ECU (5); the ECU (5) controls the solenoid valve (13) through a solenoid valve controller (6) so as to control the quantity of added hydrogen peroxide. According to the system, hydrogen peroxide is added to the fuel oil; the hydrogen peroxide has the volatilization effect; the NOx generation can be controlled by lowering down the maximum temperature in the cylinder; oxygen generated by the volatilization of hydrogen peroxide and the weak blasting effect are utilized to improve oil-gas mixing and control the PM.
Description
technical field [0001] The present invention relates to adding hydrogen peroxide (H 2 o 2 ) system and control strategy can reduce NOx emissions in diesel engine exhaust emissions. technical background [0002] Diesel engines are widely used due to their high thermal efficiency. With the shortage of energy and the enhancement of people's awareness of environmental protection, emission regulations have become more and more strict on the emission of NOx and PM in the exhaust of diesel engines. The necessary conditions for NOx generation are: high temperature, oxygen enrichment and residence time, all of which are indispensable. The important condition for the generation of PM is oxygen deficiency. Although the traditional combustion mode is generally oxygen-enriched combustion, the oxygen concentration in local areas is low due to the incomplete and uniform mixing of oil and gas, which leads to the generation of PM. It can be seen from the formation conditions of NOx and PM...
Claims
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IPC IPC(8): F02B47/06F02M25/00F02M25/10
CPCY02T10/12
Inventor 韩恒田径张龙平许允亓升林
Owner JILIN UNIV