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AssigneeLinning Trucktec GmbH
InventorsWolfgang Faller, Andreas Wolf
Estimating the term…
A drive member (1) for a water pump of the cooling-water circuit of an internal combustion engine, with a drive wheel (7) and a shaft (4) which is coupled to the water pump, is proposed. According to the invention, for the transmission of torque between the drive wheel (7) and the shaft (4), an electromagnetically actuable friction-disk clutch (9, 10, 11, 12) and a second clutch device in the form of an eddy-current clutch (14) are provided, the latter taking up the shaft (4) when the friction-disk clutch is out of engagement. Moreover, a frictional shift clutch for a drive member of this type is proposed.
Drive member (1) for a water pump of the cooling-water circuit of an internal combustion engine, with a drive wheel (7) and a shaft (4) which is coupled to the water pump, characterized in that, for the transmission of torque between the drive wheel (7) and the shaft (4), an electromagnetically actuable friction-disk clutch (9, 10, 11, 12) and a second clutch device in the form of an eddy-current clutch (14) are provided, the latter taking up the shaft (4) when the friction-disk clutch (9, 10, 11, 12) is out of engagement.
Drive member according to one of the preceding claims, characterized in that the rotor is designed as a fan wheel (3, 21).
Drive member according to one of the preceding claims, characterized in that the drive wheel is designed as a V-belt pulley (7), the friction-disk clutch (9, 10, 11, 12) and the eddy-current clutch (14) lying axially in the region of the width b of the V-belt pulley (7).
Drive member according to one of the preceding claims, characterized in that the drive wheel (7) is mounted above the shaft (4) by means of a hollow shaft (8).
Frictional shift clutch for an internal combustion engine for the transmission of torque between a drive wheel (7) and a rotating part (3, 21) to be driven, with a friction-disk clutch and with a second clutch device in the form of an eddy-current clutch (14) which takes up the part (3, 21) to be driven when the friction-disk clutch is out of engagement, characterized in that the friction-disk clutch and the eddy-current clutch (14) are positioned concentrically to the axis of rotation of the drive wheel (7), and in that the drive wheel is designed as a V-belt pulley (7), the friction-disk clutch and the eddy-current clutch (14) lying axially in the region of the width b of a drive ring (17) of the V-belt pulley (7).
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
By cutting in or out of pumps: using clutches, e.g. electro-magnetic or induction clutches
Pumping cooling-air or liquid coolants: pumping liquid coolant; Arrangements of coolant pumps
By varying pump speed, e.g. by changing pump-drive gear ratio: using mechanical drives
Using friction clutches: actuated electromagnetically
Term end not estimated
“Drive member for a water pump of the cooling-water circuit of an internal combustion engine and frictional shift clutch”
The invention relates to a drive member for a water pump of the cooling-water circuit of an internal combustion engine and to a frictional shift clutch according to the preamble of claim 1 and 8 respectively.
Internal combustion engines regularly have a cooling-water circuit in order to maintain them at a favorable operating temperature. For effective heat transport, it is necessary for the water in the cooling circuit to be kept constantly in motion. For this purpose, generally, a water pump driven permanently by the engine is used, which ensures a constant circulation of the water in the cooling-water circuit.
Two exemplary embodiments of the invention are illustrated in the drawings and are explained in more detail, with further advantages and particulars being given. In the drawings:
FIG. 1a shows a top view of a V-belt pulley with a fan wheel on a water-pump drive shaft,
FIG. 1b shows the V-belt pulley with fan wheel according to FIG. 1a, in a sectional view along the sectional line A-A, arranged on an engine block portion not shown in section, and
The drive member 1 for a water pump (not illustrated) of the cooling-water circuit of an internal combustion engine comprises a fan wheel 3 (made, for example, of aluminum), which is connected fixedly in terms of rotation, here, for example, via a screw 18, to a drive shaft 4 of the cooling-water pump. A V-belt pulley 7 is rotatably mounted by means of a ball bearing 6, via a hollow shaft 8, on a sleeve 5 of the fan wheel 3, into which sleeve the front region of the drive shaft 4 is pushed.
Positioned fixedly on a pump casing 2 of the engine block is an annular stator 9, in the annular slot 10 of which is arranged a likewise fixed electromagnet 11. The line routing to the electromagnet 11 is not illustrated.
In the region of the electromagnet 11, the V-belt pulley is designed as an annular disk portion 7a. On that side of the disk portion which is located opposite the electromagnet 11, an annular armature disk 12 is positioned on the fan wheel 3.