Introduction 1.The Development of Automobile and Tractor 1.1 The development of automobile In 1886,a German called Karl Benz(Carl Benz)successfully developed the world's first single-cylinder two-stroke gasoline three-wheeled vehicles. 业械电子工程学度二 Automobile and Tractor Northwest A&F University Automobile and Tractor Northwest A&F University Introduction 1. The Development of Automobile and Tractor 1.1 The development of automobile In 1886, a German called Karl Benz (Carl Benz) successfully developed the world's first single-cylinder & two-stroke gasoline three-wheeled vehicles