The invention provides a catalyst ignition stage
torque distribution method. The method is used for a
hybrid vehicle comprising a
control system and an exhaust
system. The method comprises the following steps that: a
vehicle driving demand torque and the first temperature of a first
catalytic converter are acquired, and whether the temperature of the first
catalytic converter reaches an ignition temperature or not is judged; and if the temperature of the first
catalytic converter does not reach the ignition temperature, the
vehicle driving demand torque is compared with a
motor torque output threshold value, and when the
vehicle driving demand torque is smaller than or equal to the
motor torque output threshold value, a
motor control module is adopted to control the output torque of the motor to be the vehicle driving demand torque and control an engine to heat the first catalytic converter. On the basis of the method, the invention further provides a
system and a device. According tothe method,
system and device of the invention, different output
torque distribution strategies are designed the engine works under proper working conditions, so that the temperature of the first catalytic converter and the temperature of a second catalytic converter are increased respectively, and meanwhile, the torque output range of the engine is limited; the situation that
oil consumption andemission are not facilitated due to multiple transient working conditions of the engine, large load of a refrigerator and the like is avoided; and vehicle fuel economy is improved.