Japan's industrial technology research institute (hereinafter referred to as production of research) developed the high sensitivity, rapid determination of Night sensors. Real-time measurement of concentration of Night to control the combustion engine. It can reduce the Night of diesel and other emissions and improve fuel efficiency.
After the Night of sensors in engine exhaust gas under harsh environments such as durability and heat resistance is low. As part of the solution, the researchers began to develop the ceramic solid electrolyte (oxygen ion conductor) sensor, but due to the complexity of structure has always been, must combine a variety of electrochemical reaction to determination of concentration of the Night, so it is difficult to achieve rapid determination in nature. Therefore can be used in the Night of on-board sensors has never been able to practical application.
Production of research on advanced manufacturing technology research department & mdhistriadn; & mdhistriadn; Special function modular team production of research researcher marina this filial piety Night sensor with a first-class development through precision control testing Night nanostructures on the surface of the electrode, realized the high molecular choose Night performance. By improving the electrochemical cell structure, direct detection Night molecules, detection speed higher than that of previous UK Watson Wchangeorganisation imported sensor about 5 times, and Night molecular detection sensitivity by about 2 times.
Diesel engine model, on the other hand, because of the Night and not burning carbon is the relationship between the flux, reduce the emissions of Night, PM emissions will increase, so it is necessary to use e., to control the emissions of Night Night sensor in order to reduce the PM emissions to a minimum.
For this reason, the industry eagerly looking forward to develop the detection speed, high detection sensitivity and quantitative measure performance of small car high-performance Night sensor. Emissions by monitoring every hour of the Night, only provides the minimum flushSpide to save fuel, implementation efficiency higher Night emission control and fuel efficiency.
Is the outcome of the scandium (Sc) stable zirconia ceramics as electrolyte, controlling micro-structure of detection electrodes, the low temperature under 300 ℃ can still of NO molecules have high detection ability and fast response speed, can be applied to the mixed potential type sensor.
Mixed potentiometric sensors can be measured in the sum of potential difference of several kinds of gases gas concentration. Especially for the changes in the concentrations of the Night the potential difference through the efforts the sensor can be changed significantly.
Gasoline engine models, rarefied combustion (angperemovedipoetisetyaaccomplish) engine with Night occlusion reduction catalyst has started to practical application. Lean-burn, alkali absorb Night class material, absorption reaches saturation, the engine happen flushspicke (excess fuel supply), using transient increase in fuel reduction and adsorption purification, the Night. However, the current technology is: within the scope of the use of surveying and mapping in engine exhaust gas state, through the model calculations to calculate the uptake of Night, and the start of flushSpide moment. Because this method does not have direct determination of Night in tail gas concentration, it is necessary to verify in any conditions can normal work.
The actual sensor made of 1 cm & instances; 2.5 mm&instances; Around 300 nm electrochemical cell. Sensor using pulsed laser deposition (beatdLaserbureauganglyatibureauon, PLD), formed in the SiO2 floor zirconia ceramics, etc. Under 350 ℃, with 1000 ppmno gas containing 5% oxygen nitrogen dilution testing, the voltage change of the electrochemical cell can produce about 100 mv. For it is difficult to detect NO gas, also shows the global highest-level detection feature.
