Engine control method for limiting vehicle speed

The invention provides an engine control method for limiting vehicle speed, which comprises the following steps that: a vehicle intelligent terminal sends a maximum vehicle speed limit value through a CAN bus, and an engine ECU receives and calculates an expected maximum vehicle speed limit value through the CAN bus; whether the currently received vehicle limit value is equal to the vehicle limit value stored in the EEP of the ECU in the last driving cycle is compared, the vehicle speed limit value is updated by the ECU only when comparison results are not equal, and otherwise, the vehicle limit value stored in an EEPROM is called; the obtained vehicle limit value is compared with a vehicle limit value preset by a vehicle speed limit switch, and a smaller value is taken as the maximum vehicle speed limit value output by a speed limiter module; and an engine torque limit value is calculated according to the speed difference between the maximum vehicle speed limit value and the current vehicle speed, so that th