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VVEB的英文原意是Variable Vavle Exhaust Brake,即可变气门排气制动技术。可变气门制动(VVEB)技术能使排气门的开度随发动机转速而发生变化。发动机转速高时,排气门的开度变大;发动机转速低时,排气门的开度变小。采用VVEB技术的缓速装置可以使行驶中的车辆,特别是下长坡的车辆速度减低或保持在一定速度范围内,从而大大提高车辆的可靠性、安全性和经济性
VVEB English original meaning is Variable Vavle Exhaust Brake, that is variable valve exhaust brake technology. Variable valve brake (VVEB) technology allows the exhaust valve opening with the engine speed changes. When the engine speed is high, the opening degree of the exhaust valve becomes larger; when the engine speed is low, the opening degree of the exhaust valve becomes smaller. Retarders with VVEB technology reduce or maintain the speed of vehicles on the road, especially downhill, within a certain speed range, thereby greatly improving the reliability, safety and economy of vehicles