DPF for short is a kind of ceramic filter installed in the engine exhaust system, which can capture particulate emissions before they enter the atmosphere. Simply put, a mask is added to the exhaust pipe.
in p>1769, a Frenchman, N·J· Guniu, made a three-wheeled car driven by steam generated by gas combustion. However, the speed of this kind of car is only 4 kilometers per hour, and it is very troublesome to stop and add coal to the boiler every 15 minutes. Later, the car crashed into a brick wall during a trip and was smashed to pieces. In 1879, German engineer Karl Benz successfully tested a two-stroke experimental engine for the first time. In October 1883, he founded "Ben Ci Company and Rhine Gas Engine Factory". In 1885, he made the first Ben Ci patented motor vehicle in Mannheim, which was a three-wheeled vehicle with a two-stroke single-cylinder gasoline engine with .9 horsepower. This vehicle had some basic characteristics of modern automobiles, such as spark ignition, water cooling cycle, steel tube frame, leaf spring suspension, rear-wheel drive, front-wheel steering and brake handle. On January 29th, 1886, German engineer karl benz applied for a patent for his motor vehicle. In November of the same year, karl benz's three-wheeled motor vehicle obtained the German patent (patent number: 37435a). This is recognized as the first modern car in the world. For the above reasons, people generally regard 1886 as the first year of automobiles, and some scholars regard the year when karl benz made the first three-wheeled automobile (1885) as the year when automobiles were born. 1885 was a decisive breakthrough in automobile invention. Ben Ci, who was in the same factory as Daimler at that time, was also studying cars. In 1885, he made a gasoline engine almost at the same time as Daimler, installed it in a car and drove at a speed of 13 kilometers per hour, which was successful. This year, Britain's Butler also invented a car with a gasoline engine. In addition, Bernard of Italy also invented the automobile, and Puchilov and Vorobov of Russia invented the automobile with internal combustion engine.