实践证明,中速行车好处多,安全节油保护车。 1.中速行车有利于延长发动机使用寿命。发动机由于高温、高压和高速运转,其寿命短于底盘各主要总成。实验证明,转速对发动机的磨损影响较大。低转速时润滑条件不良,配合件之间难以形成良好的润滑油膜,因此,使零件磨损增大。在高转速时,活塞、连杆等往复运动机件的惯性力增加,润滑油易被挤出,机件温度升高,润滑油粘度降低,使磨损加剧。农用车或汽车在中速行驶时磨损最小,并有利于节省燃油。 2.车辆高速行驶时,空气阻力增大,车速增加1 Practice has proved that the benefits of medium-speed driving more fuel-efficient safety car. 1. Medium-speed driving is beneficial to prolong the service life of the engine. Engine due to high temperature, high pressure and high-speed operation, its life is shorter than the main assembly of the chassis. Experiments show that the speed of the engine wear a greater impact. Poor lubrication conditions at low speeds, difficult to form a good lubricant film between the parts, so that parts wear increased. At high speed, piston, connecting rod and other reciprocating parts of the inertia force increases, the lubricating oil is easily squeezed out, the temperature of the mechanical parts increases, reducing the viscosity of the lubricating oil, so that wear increased. Agricultural vehicles or cars have minimal wear and tear at medium speeds and help to save fuel. 2. When the vehicle is running at high speed, the air resistance increases and the speed increases by one