The present invention provides a control system of a straddle type vehicle, estimating a second force acting on a rear wheel of the straddle type vehicle from an obstacle, on a basis of a first force acting on a front wheel of the straddle type vehicle from the obstacle; and controlling a rear suspension mechanism configured to support the rear wheel, on a basis of an estimation result, when the rear wheel is affected by the obstacle, wherein a force converted from the first force according to a difference in a state of the straddle type vehicle between when the front wheel is affected by the obstacle and when the rear wheel is affected by the obstacle is estimated as the second force.

A motor control method includes a determination step of determining whether a contact portion exists, which is a portion where the screw and the nut member are in contact with each other at a location different from a mating portion, when the motor is energized to move the nut member in a first direction, and when the contact portion is determined to exist in the determination step, a return step of energizing the motor to move the nut member in a second direction opposite to the first direction until the contact portion no longer exists.

A motor control method includes a determination step of determining whether a contact portion exists, which is a portion where the screw and the nut member are in contact with each other at a location different from a mating portion, when the motor is energized to move the nut member in a first direction, and when the contact portion is determined to exist in the determination step, a return step of energizing the motor to move the nut member in a second direction opposite to the first direction until the contact portion no longer exists.

The bike (10) comprises a frame provided with a front wheel (12) oriented by a handlebar, a saddle (39) and a crankset. The bike (10) further comprises two pivoting rear uprights (18, 19) each carrying a rear wheel (22, 23), the pivoting rear uprights being mounted by independent pivot links on the frame. The crankset actuates two drive means (26, 27, 59, 60) independent of the rear wheels. The drive means of each rear wheel comprises a free wheel (59, 60). The drive means are configured such that, in a bend, only the rear wheel located on the inside of the bend is driven by the crankset, the rear wheel located on the outside of the bend freewheeling and not being driven by the crankset.

An all-terrain vehicle includes a frame, wheels, a vehicle cover, a power supply system a saddle assembly, a brake system, a drive assembly and a suspension system. The all-terrain vehicle is sized for children to ride, with numerous disclosed modifications in accordance with its size and riders. For instance, the saddle assembly includes a locking hook accessible from the rear of the vehicle, and in the locked state holds the main power supply down into its compartment. The brake system uses a pawl for two handed setting of the parking brake. The instrument assembly allows adjustment of the display angle of the display screen. The charger cover uses a damping block to cause the cover to hover at a selected position. The all-terrain vehicle can meet the use needs and safety requirements of all-terrain vehicles for kids, and can ensure the safety of drivers.

An all-terrain vehicle includes a frame, wheels, a vehicle cover, a power supply system a saddle assembly, a brake system, a drive assembly and a suspension system. The all-terrain vehicle is sized for children to ride, with numerous disclosed modifications in accordance with its size and riders. For instance, the saddle assembly includes a locking hook accessible from the rear of the vehicle, and in the locked state holds the main power supply down into its compartment. The brake system uses a pawl for two handed setting of the parking brake. The instrument assembly allows adjustment of the display angle of the display screen. The charger cover uses a damping block to cause the cover to hover at a selected position. The all-terrain vehicle can meet the use needs and safety requirements of all-terrain vehicles for kids, and can ensure the safety of drivers.