Internal Combustion Engine Drives Motion and Work
The tractor generates power through an internal combustion engine, drives the traveling mechanism through the transmission system, and uses the power take-off shaft or hydraulic system to operate agricultural implements. The core is to convert engine torque into traction force and coordinate major systems to complete field tasks.
Travel and Power Transmission
Power Generation and Transmission: The diesel engine burns fuel to generate rotational power, which is transmitted to the drive wheels through the clutch, gearbox, and other transmission systems.
Driving Force for Movement: After the drive wheels receive torque, they apply a backward tangential force to the ground, and the ground produces an equal and opposite reaction force to push the tractor forward.
Travel Conditions: The tractor can move normally only when the driving force exceeds the sum of wheel rolling resistance and implement draught resistance; otherwise, the drive wheels will slip.
Difference Between Crawler and Wheeled Tractors: Crawler tractors generate driving force by the drive wheels wrapping the tracks and using the interaction between the tracks and the ground, making them suitable for soft soil.
Implement Operation Mechanism
Power Take-Off (PTO): Transfers engine power to rotary implements such as rotary tillers and seeders, with the rotational speed usually proportional to the engine speed.
Hydraulic Lift System: Based on Pascal's law, it uses the oil pump, distributor, and cylinder to implement lifting, depth adjustment, and forced soil penetration of agricultural implements.
Connection Methods: Implements can be connected to the tractor by traction, suspension, or semi-suspension methods. Modern tractors mostly use a rear suspension device.
