The braking force of the service brake must be reasonably distributed among the axles.

1 The braking force of the service braking of motor vehicles (except two wheel, motorized tricycle scooter) must be symmetrically distributed between the left and right wheels of the same axle with respect to the longitudinal central plane of the motor vehicle.

2 The brake must have a wear compensation device. After the brake is worn, the brake clearance must be easily compensated by manual or automatic adjustment devices. The brake control device and its components as well as the brake assembly must have a certain reserve stroke. When the brake is heated to a certain extent, it shall still maintain effective braking without immediate adjustment.

The emergency brake must stop the vehicle within the specified distance when only one pipeline of the service brake fails.

1. Emergency braking can be an independent system with emergency characteristics or separated from service braking.

2. The emergency braking must be controllable. The arrangement of the emergency braking shall make it easy for the driver to operate. The driver can brake when he holds the steering wheel with at least one hand in his seat. Its operating mechanism can be combined with the operating mechanism of the service brake system or the parking brake system, but the three operating mechanisms shall not be combined

1、The traction battery of electric vehicle shall not be placed in the cargo box or passenger compartment; However, when it has to be placed in the cargo box or the passenger compartment due to the restriction of the structure, corresponding devices must be set to isolate it safely (when placed in the cargo box, it should be ensured that the power storage battery and the electrical circuit will not be squeezed by the goods) and ensure that it is in a good ventilation state with the outside world. If necessary, an alarm device for excessive hydrogen content should be set.

2、 The electric shock protection requirements of the electric vehicle when it is not connected to the external power supply shall comply with relevant  cargo regulations.

3、The exhaust pipe orifice of motor vehicle engine shall not point to the right side of the vehicle cargo body.

Through the exhibition of the West China Trade Fair, we found that the tricycle industry has a good development prospect. At present, our manufacturing technology is becoming more and more mature. In the future, under the leadership of the Party and the government, we will keep pace with the development of the times, bring forth the new, and combine technology with modern technology to make Dayang three rounds more brilliant. In addition, we look forward to serving more people in the near future