Land leveler control method, system and leveler

The invention discloses a control method of a land scraper, which comprises the following steps: the load of the land scraper under different working conditions is monitored; the monitored load is compared with the preset load; a corresponding characteristic curve is selected according to the comparison result; an EFI engine is controlled to run according to the selected characteristic curve. Theinvention also provides a land scraper control system and a land scraper consisting of the control system. The electronic control unit of the EFI engine of the land scraper stores more than two sets of characteristic curves. When the load of the land scraper is different, the land scraper selects different characteristic curves and the EFI engine runs according to different characteristic curves.Therefore, a rotating speed value can correspond to more than one power values and torque values. The land scraper realizes different output power and torque of the EFI engine under different load, meets the requirements of the land scraper under different working conditions, saves energy and improves working quality.