Emissions at idle speed are significantly higher than gasoline emission performance

Gasoline Engine Test Results When idling emissions tests are performed, the operating conditions when using gasoline are basically the same. As can be seen from the test data, the emissions at idle are significantly higher than those from gasoline. Compared with curve gasoline without gasoline, for the Shanghai plant, because of the special structure of the mixer, the airflow at the inlet of the carburetor is improved, and gasoline is plotted in the graph when gasoline is used. The momentum has improved significantly, but fuel consumption has increased slightly. From the test adjustment process, we can know that it is also indifferent to different devices. Through the adjustment of fuel intake, as long as the amount of air supply is sufficient, its power can reach the same level as gasoline, but the result will be The engine economy and emission performance significantly deteriorated. From the engine's load characteristic curve, we can see that under the same conditions, the consumption and consumption rate are about 10% lower than that of gasoline. It can be seen from the load characteristics that under various operating conditions, the consumption and The consumption rate is lower than that of gasoline, which is more practical for the economy of dual-fuel vehicles.

Theoretically speaking, the fuel consumption and engine dynamics should complement each other and the changes should be basically the same. The value of the air-fuel ratio is approximately higher than that of gasoline. Therefore, if the engine power is not considered to have a certain degree of decline, the economy of burning liquefied petroleum gas is more obvious. With better throttle opening performance, the gas consumption quality is basically the same as that of gasoline. Even with large amounts of air intake, the combustion condition tends to be stable, and it will be slightly higher at lower speeds. It will fall and remain at a low level, but after a high load is reached, the emission performance will increase sharply with the mixture, and the unburned amount will also increase from the load discharge characteristic curve. However, emissions at low loads are lower than those of gasoline, and the speed at which the load must change becomes worse. When the fuel is used under different operating conditions, the emissions from the fuel are not always better than the gasoline, which is about 50% higher than the gasoline 15 and reaches the oil. At high and medium loads, most of the fuel used for combustion is gasoline, which is low at low loads, high to high loads and higher than gasoline. At this time, the amount will increase sharply when the load is mixed in this section.

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