Travel controller of grass mower

PURPOSE: To avoid the engine stop due to an overload and realize smooth grass mowing operation. CONSTITUTION: This travel controller is equipped with an engine E, respectively interlocked and connected to a grass cutting part 2 for performing grass mowing operation and a mobile device 1B, a sensing means 4 for the engine load, a controlling means 5 for controlling the travel based on the information from the load sensing means 4 and an advancing and backing changeover means 6 capable of changing over the travel direction to both advancing and backing directions and a cutting height regulating means 9. The controlling means 5 is capable of running the grass mower through a prescribed distance in the backing direction and then readvancing when the engine load is larger than the set value N1 for discriminating the large load, lifting the cutting height, running the mower, subsequently backing the mower through the distance run with a lifted cutting height, returning the cutting height to the original height and readvancing the mower when the engine load is larger than the limit set value N2 larger than e set value N1 for discriminating the large load, decelerating and controlling a travel speed change mechanism 3 when the engine load is located between the set value N1 for discriminating the large load and the set value N0 for discriminating the small load which is a smaller value than the set value N1. COPYRIGHT: (C)1993,JPO&Japio