Two-wheeled vehicle and chassis braking system

1. A chassis braking system for braking a chassis, comprising:

a braking device comprising a lock and a braking surface biased toward a road surface on which said chassis runs and having a first state, where movement of said braking surface toward said road surface is locked by said lock, and a second state where said braking surface abuts against said road surface and

a controller that releases said lock of said braking device and shifts said braking device from said first state to said second state when a predetermined condition is met.

2. A chassis braking system for braking a chassis, comprising:

a braking device comprising a braking surface biased toward a road surface on which said chassis runs and having a first state, where movement of said braking surface toward said road surface is locked and a second state where said braking surface abuts against said road surface and

a controller that releases said lock of said braking device and shifting said braking device from said first state to said second state when predetermined conditions are met wherein

said braking device includes

a first moving body and a second moving body biased in directions approaching each other and

a movement mechanism that causes said braking surface to move toward said road surface as said first moving body and said second moving body approach each other,

wherein, in said first state, movement of said first moving body and said second moving body to approach each other is locked.

3. A two-wheeled vehicle comprising

a first wheel and a second wheel that rotate about shafts perpendicular to a running direction and arranged on a chassis along said perpendicular direction,

a braking means comprising device including a lock and a braking surface biased toward a road surface on which said first wheel and said second wheel run and including a first state where movement of said braking surface toward said road surface is locked and a second state where said braking surface abuts against said road surface, and

a controller that releases said lock of said braking device and shifts said braking device from said first state to said second state when a predetermined condition is met.

4. The chassis system of claim 1 , wherein the controller receives an input signal from at least one sensor and generates a drive signal to release the lock such that the braking surface moves to the second state where said braking surface abuts against said road surface.

5. The chassis system of claim 4 , wherein the input signal includes information relating to at least one a pitch angle of the chassis, a roll angle of the chassis, and a yaw angle of the chassis.

6. The chassis system of claim 4 , wherein the input signal includes information relating to at least one a torque load on a motor disposed in the chassis, a temperature in a radiator disposed in the chassis, and a voltage provided by a battery disposed in the chassis.

7. The chassis system of claim 1 , wherein the chassis includes a motor, a battery, and a solenoid.

8. The chassis system of claim 1 , wherein the lock includes at least one solenoid.

9. The chassis system of claim 8 , wherein the at least one solenoid moves a projection in a pathway of a first moving body that moves in a direction parallel to the ground.

10. The chassis system of claim 8 , wherein the at least one solenoid includes first and second solenoids that move first and second projections, respectively, in a pathway of first and second movable members.

11. The chassis system of claim 10 , wherein the first and second movable members are biased to move in opposite directions.