The most commonly used connection among vehicles is bolt connection.
China's latest national standard "Terms and Definitions of Types of Cars and Trailers" (GB/T 373.1—21) defines cars as follows: vehicles driven by power and with four or more wheels are mainly used for carrying people and/or goods; Towing vehicles carrying people and/or goods; Special purpose.
domestic automobile brands are: Wuling, Baojun, Hongqi, Chang 'an, Great Wall, Chery, Geely, Roewe, BYD, etc.
Foreign automobile brands include Toyota, Volkswagen, Audi, Mercedes-Benz, Hyundai, Kia, Peugeot and Cadillac.
in p>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", and in 1885, he made the first Ben Ci patented motor vehicle in Mannheim.
This vehicle is a three-wheeled vehicle, which uses a two-stroke single-cylinder gasoline engine with .9 HP. This vehicle has some basic characteristics of modern vehicles, 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 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.