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US 8,408,170 B2Granted
Cooling fan for internal combustion engine having axially adjustable fan rotor
AssigneeScania CV AB
InventorsZoltan Kardos, Erik Söderberg
Life of this patent
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Abstract
A cooling fan (10) for a vehicle engine (50), having a fan casing (60) and a fan rotor (12) which is movable axially relative to the fan casing during operation. There is an actuator (20) for moving the fan rotor (12) to positions which represent various degrees of protrusion (a) from an end of the fan casing (60) in order to optimise the fan's suction capacity and efficiency on the basis of current operating parameters such as fan speed and vehicle velocity.
Claims10
A cooling fan for a vehicle engine, comprising:
- a fan casing having an axial end;
- a fan rotor which is movable axially relative to the fan casing during operation of the fan rotor;
- an actuator for moving the fan rotor to axial positions which represent various degrees of protrusion from the axial end of the fan casing such that the fan casing and the fan rotor are configured for optimising the fan's suction capacity and efficiency on the basis of current operating parameters, including fan speed and vehicle velocity,
- sensors for detection of magnitudes relating to a cooling requirement at the engine, and
- a control unit connected, configured and operable for switching the actuator for moving the fan rotor in response to signals from the sensors.
2 more elements
A cooling fan for a vehicle engine, comprising:
- a fan casing having an axial end;
- a fan rotor which is movable axially relative to the fan casing during operation of the fan rotor;
- and
- an actuator for moving the fan rotor to axial positions which represent various degrees of protrusion from the axial end of the fan casing such that the fan casing and the fan rotor are configured for optimising the fan's suction capacity and efficiency on the basis of current operating parameters, including fan speed and vehicle velocity,
- wherein the actuator comprises a cylinder and a piston rod and the fan rotor is connected with the piston rod to be moved thereby.
2 more elements
Dependencies are inferred from the claim text.