The vertical engine means that the engine is perpendicular to the front axle of the car. Simply put, you stand in front of the front of the car to the engine. If the engine is placed vertically in front of your eyes, it is a vertical engine.
In general, rear-drive vehicles use a vertical engine, because the power is transmitted to the rear axle. In the case where the transmission distance cannot be shortened, the direction change of the power should be reduced as much as possible. If the transverse direction is used, because the direction of the crankshaft and the drive shaft are perpendicular, the direction is first converted to transmit power through the transmission shaft, but the direction of the transmission shaft and the direction of the rear axle are also vertical, so the rear axle needs to be The direction of rotation is reversed, which undoubtedly reduces the efficiency of the drive train. The use of a vertical engine allows the crankshaft to be parallel to the drive shaft, reducing the conversion of the primary drive direction, undoubtedly reducing energy losses.
“Reverse” is a special arrangement of the transverse engine. The usual transverse engine exhaust manifold is in front, and the rear arrangement of the intake manifold is simply “going forward and backward” if it will enter The position of the exhaust gas is exchanged, the intake manifold is placed at the front end, and the exhaust manifold is placed at the rear, becoming "forward and backward", which is called "reverse". Only the horizontally placed engine has the "positive and reverse" theory. The longitudinal and vertical engine intake and exhaust manifolds are at the left and right ends. There is no difference in the interchange, so there is no such statement.