Method of varying vehicle engine braking torque using full authority active fuel management

A method for intelligent active engine braking using full authority active fuel management based on vehicle speed and brake pedal position. The method includes determining if the tow mode of the vehicle has been selected and enables all engine cylinders to ensure maximum engine braking capacity is available. When vehicle tow mode is not selected then the method varies engine braking capacity by disabling one or more cylinders based on the vehicle speed and brake pedal position. 种用于基于车辆速度和制动踏板位置的全权主动燃料管理的智能主动发动机制动方法。该方法包括确定是否已经选择车辆的牵引模式，并且使所有发动机气缸能够确保最大的发动机制动能力是可用的。当没有选择车辆牵引模式时，该方法基于车辆速度和制动踏板位置通过禁用个或多个气缸来改变发动机制动能力。