How does a hydraulic fan work?
The hydraulic fan drive creates airflow through the engine-cooling radiator and the charge air cooler. Diagram. A hydraulic fan motor directly drives the engine Modulated fan speed will depend on the amount of oil flowing through the fan motor. The oil flow is measured in gallons per (GPM) minute.
How does a fan speed control work?
Fan speed is reduced by placing a capacitor in series with the switched live feed to the fan reduce power. The capacitor acts as a dropper. Speed depends on the value of the capacitor in circuit. The speed control switch selects a different capacitor to give different speeds.
Why hydraulic fan?
A hydraulic fan drive system allows variable fan speed independent of the engine speed. It provides only the cooling that is required throughout the operating range of the vehicle including such requirements as the maximum engine rated torque point where high cooling may be required at lower than maximum engine speed.
What are the benefits of electric fan?
A key advantage of electric fans is increased engine cooling and improved air conditioning cooling at idle, when it is most needed. In addition, replacing an engine-driven fan can increase horsepower and improve fuel economy as the engine drag from turning the fan is eliminated.
Why are hydraulics so powerful?
Hydraulics have the highest power density of any mechanical transmission system in existence. This means the most force and power can be created from the smallest possible actuator. A medium-duty hydraulic cylinder with a 2-in. diameter piston will operate in the range of 1500 psi.
What kind of fan does a hydraulic fan use?
A basic hydraulic fan system has an engine driven pump connected to a motorized hydraulic fan assembly. The pump may be belt-driven or attached to the accessory drive. Optional on-demand systems typically utilize electro-hydraulic circuits to monitor and control flow.
How does a hydraulic fan drive improve airflow?
Reduced Power Consumption, Increased Control: A hydraulic fan drive reduces tip clearance and improves airflow by 10-15%. Traditional direct-drive engine mounted fan systems consume excess power because the fan speed is dependent on the engine speed.
How does a hydrostatic fan drive system work?
With this system, much of the power used to drive the fan is wasted. The temperature-activated, electronically-controlled, hydrostatic fan drive system can offer finer control and reduce the fan speed during times of low cooling demand. Therefore, the fan drive system can use less power.
How does ramping Parker hydraulic fan drive work?
The full cooling control of hydraulic fan drives enables ramping Parker hydraulic fan drive systems are efficient throughout the engine and vehicle’s operating range. Traditional on/off clutch solutions operate only at maximum speed and can suddenly drain power to the vehicle and slow down the work cycle.
A basic hydraulic fan system has an engine driven pump connected to a motorized hydraulic fan assembly. The pump may be belt-driven or attached to the accessory drive. Optional on-demand systems typically utilize electro-hydraulic circuits to monitor and control flow.
Reduced Power Consumption, Increased Control: A hydraulic fan drive reduces tip clearance and improves airflow by 10-15%. Traditional direct-drive engine mounted fan systems consume excess power because the fan speed is dependent on the engine speed.
With this system, much of the power used to drive the fan is wasted. The temperature-activated, electronically-controlled, hydrostatic fan drive system can offer finer control and reduce the fan speed during times of low cooling demand. Therefore, the fan drive system can use less power.
The full cooling control of hydraulic fan drives enables ramping Parker hydraulic fan drive systems are efficient throughout the engine and vehicle’s operating range. Traditional on/off clutch solutions operate only at maximum speed and can suddenly drain power to the vehicle and slow down the work cycle.