GB2083865A - Electrically driven fan and pump assembly - Google Patents

Electrically driven fan and pump assembly Download PDF

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Publication number
GB2083865A
GB2083865A GB8029677A GB8029677A GB2083865A GB 2083865 A GB2083865 A GB 2083865A GB 8029677 A GB8029677 A GB 8029677A GB 8029677 A GB8029677 A GB 8029677A GB 2083865 A GB2083865 A GB 2083865A
Authority
GB
United Kingdom
Prior art keywords
fan
pump
motor
electrically driven
pump assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8029677A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB8029677A priority Critical patent/GB2083865A/en
Publication of GB2083865A publication Critical patent/GB2083865A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

An electrically driven fan and pump assembly for a vehicle comprises a reversible electric motor (1) which drives both a fan (6) and a pump (9) such that the pump is operative and the fan inoperative whilst the motor rotates in one direction, and the pump is inoperative and the fan operative whilst the motor rotates in the opposite direction. The drive means (13) between the motor and the pump and that (7) between the motor and the fan may be one-way clutches, and the fan may be provided with means to feather each fan blade to render it inoperative whilst rotating. The fan acts as a radiator cooling fan whilst the pump is a vacuum pump for a brake system. <IMAGE>

Description

SPECIFICATION Electrically driven fan and pump assembly This invention relates to an electrically driven fan and pump assembly for vehicles.
It is well known in vehicles having internal combustion engines to provide an electrically driven fan instead of or in addition to a fan driven mechanically by the engine. The electrically driven fan is usually positioned adjacent to a water radiator to increase the air flow through the radiator in order to prevent overheating of the internal combustion engine. The electric motor coupled to the fan is often energised in response to a thermocouple sensing the cooling water temperature.
There is an increasing requirement in vehicles for servo-assisted brakes. Some kind of booster is employed at a convenient location in the brake circuit in order to augment the force generated directly by the driver's foot. Most commonly a pedal-operated master cylinder and booster assembly is employed in which a pedal-operated input rod controls the differential pressure applied to a movable wall of the booster which acts upon the master cylinder piston. A vacuum supply, or less often a source of super-atmospheric pressure, is required for operating the booster. It has been common practice to obtain the vacuum supply by making use of the engine manifold depression, but this may affect the emission characteristics of the engine so that in future it may not always be convenient to use manifold depression.There is therefore a requirement for a separate vacuum supply, or source of super-atmospheric pressure in some cases. With a diesel engine this is almost essential.
According to the invention we provide an electrically driven fan and pump assembly, comprising a reversible electric motor, first drive means connected between the motor and a fan, second drive means connected between the motor and a pump, the arrangement being such that for one direction of rotation of the motor rotor the fan is operative and the pump is substantially inoperative, and such that on rotation of the motor rotor in the opposite direction the pump is operated and the fan is rendered substantially inoperative.
Preferably the second drive means comprises a one-way clutch arranged such that on rotation of the rotor in said opposite direction the one-way clutch is automatically disengaged, and is automatically re-engaged when the rotor is driven again in said one direction.
In a preferred arrangement the first drive means also incorporates a further one-way clutch which is arranged to operate in the opposite sense to the other one-way clutch.
However, as an alternative, or in addition, to said further one-way clutch the fan may be provided with means to feather each fan blade so that the fan is rendered substantially inoperative even though it may be rotating.
The reversible motor might possibly be an A.C.
motor, but it will usually be a D.C. motor as is the present practice with such electrically driven fans.
It is well known to design D.C. motors such that a maximum torque is achieved under specified operating conditions. For example, chorded coils may be employed in which the coil sides are not exactly one pole-pitch apart. This gives 'brush advance'. In order to obtain maximum torque from the motor in both directions of rotor rotation, it may be desirable to provide more than one set of armature coils which are selectively energisable by an extra set of commutator brushes to provide 'brush advance' and therefore maximum torque for both directions of rotation.
Alternatively the 'brush advance' may be arranged permanently in favour of maximum torque for the vacuum pump, since this will usually require more torque than the fan.
A fan and pump assembly for a vehicle in accordance with the invention, by way of example, is shown schematically in the accompanying drawings in which: Figure 1 is a side elevation with the fan and the pump being shown in longitudinal cross-section; and Figure 2 is a view, on a smaller scale, looking from the right in Figure 1.
With reference to Figure 1, a reversible D.C.
motor 1 of the permanent magnet kind has a rotor, not shown, secured to a rotor shaft having opposite ends 2, 3 which project from the motor housing 4. A fan 5, which in this case has four blades 6 but it will be appreciated that any suitable blade arrangement may be employed, is mounted concentrically on shaft end 2 with a oneway roller clutch assembly 7 arranged concentrically between shaft end 2 and the fan hub 8.
The roller clutch assembly 7 in this case is supplied by INA Bearing Co. Ltd. and is described by them as a 'drawn-cup roller clutch'.
A vacuum pump assembly 9 comprises a pump housing 10 secured by studs 11 to the motor housing 4 and housing a pump eccentric 12. The eccentric 12 is mounted on shaft end 3 by means of a further one-way clutch assembly 13.
Assembly 1 3 is identical to assembly 7 except that it is arranged such that the clutches are respectively engaged for opposite directions of rotation of the motor shaft.
In use, the assembly is mounted in a vehicle with the fan positioned adjacent to the cooling water radiator, the vacuum pump is connected up to a vacuum receiver which acts as a source of vacuum for a brake booster, and a switching mechanism for the motor is arranged to be operated in response to a cooling water temperature sensor and in response to a pressure sensor which detects the vacuum receiver pressure. The switching mechanism is arranged to give priority to a command from the pressure sensor to operate the pump, and when there is a requirement for operation of the vacuum pump 9 the motor is energised to drive the motor shaft in the clockwise direction, looking from the right in Figure 1. Clutch 1 3 is then engaged automatically to connect shaft end 3 to pump eccentric 12, and clutch 7 is automatically disengaged, so that no work is done by the fan.On cessation of the signal from the vacuum receiver the motor will be deenergised if the sensed water temperature is sufficiently low, but if the water temperature is above a predetermined level, the motor will be energised to drive the motor shaft in the opposite, anti-clockwise direction. Clutch 7 will then be engaged automatically, and clutch 13 disengaged.
It will be appreciated that the use of the oneway clutches enables a single motor to be used to perform two functions, without the need to increase the capacity of the motor.
The one-way clutch 7 additionally enables the fan to free-wheel with respect to the motor at high vehicle speeds to avoid a 'generator action'.
Although the motor has been described as operating in response to two sensors, any suitable control system may be employed for controlling its operation. For example, a computer responsive to various engine and braking parameters may be employed.

Claims (3)

1. An electrically driven fan and pump assembly, comprising a reversible electric motor, first drive means connected between the motor and a fan, second drive means connected between the motor and a pump, the arrangement being such that for one direction of rotation of the motor rotor the fan is operative and the pump is substantially inoperative, and such that on rotation of the motor rotor in the opposite direction the pump is operated and the fan is rendered substantially inoperative.
2. An assembly according to Claim 1 wherein the first and second drive means comprise respective one way clutches, each one way clutch being arranged to operate in the opposite sense to the other one way clutch.
3. An electrically driven fan and pump assembly substantially as described with reference to the accompanying drawings.
GB8029677A 1980-09-13 1980-09-13 Electrically driven fan and pump assembly Withdrawn GB2083865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8029677A GB2083865A (en) 1980-09-13 1980-09-13 Electrically driven fan and pump assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8029677A GB2083865A (en) 1980-09-13 1980-09-13 Electrically driven fan and pump assembly

Publications (1)

Publication Number Publication Date
GB2083865A true GB2083865A (en) 1982-03-31

Family

ID=10516070

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8029677A Withdrawn GB2083865A (en) 1980-09-13 1980-09-13 Electrically driven fan and pump assembly

Country Status (1)

Country Link
GB (1) GB2083865A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5071322A (en) * 1990-01-19 1991-12-10 Mitsuba Electric Manufacturing Co., Ltd. Waterproof structure for fan motor
EP0553010A1 (en) * 1992-01-24 1993-07-28 Automobiles Peugeot Electrically driven vehicle comprising rotary vacuum pump driving device for pneumatic brake booster
US6860726B2 (en) * 2002-02-05 2005-03-01 The Boeing Company Dual drive for hydraulic pump and air boost compressor
WO2010149461A2 (en) * 2009-06-23 2010-12-29 Inficon Gmbh Maintenance machine for refrigeration units
US20110033318A1 (en) * 2009-08-05 2011-02-10 Ramirez Jr Emilio A Single Motor Multiple Pumps
FR3010675A1 (en) * 2013-09-16 2015-03-20 Peugeot Citroen Automobiles Sa DEPRESSION PRODUCTION FOR A BRAKING EFFORT MULTIPLIER IN A GASOLINE MOTOR VEHICLE.
US20160211723A1 (en) * 2013-09-04 2016-07-21 Graco Minnesota Inc. Free wheeling motor fan

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5071322A (en) * 1990-01-19 1991-12-10 Mitsuba Electric Manufacturing Co., Ltd. Waterproof structure for fan motor
EP0553010A1 (en) * 1992-01-24 1993-07-28 Automobiles Peugeot Electrically driven vehicle comprising rotary vacuum pump driving device for pneumatic brake booster
FR2686562A1 (en) * 1992-01-24 1993-07-30 Peugeot DEVICE FOR DRIVING A VACUUM ROTARY PUMP FOR A PNEUMATIC AMPLIFIER OF AN ELECTRIC MOTOR VEHICLE BRAKING SYSTEM.
US6860726B2 (en) * 2002-02-05 2005-03-01 The Boeing Company Dual drive for hydraulic pump and air boost compressor
EP1332964B2 (en) † 2002-02-05 2009-09-30 The Boeing Company Dual drive for hydraulic pump and air boost compressor
US8740582B2 (en) 2009-06-23 2014-06-03 Inficon Gmbh Maintenance machine for refrigeration units with reversible motor
WO2010149461A2 (en) * 2009-06-23 2010-12-29 Inficon Gmbh Maintenance machine for refrigeration units
WO2010149461A3 (en) * 2009-06-23 2011-05-19 Inficon Gmbh Maintenance machine for refrigeration units
US20110033318A1 (en) * 2009-08-05 2011-02-10 Ramirez Jr Emilio A Single Motor Multiple Pumps
US20160211723A1 (en) * 2013-09-04 2016-07-21 Graco Minnesota Inc. Free wheeling motor fan
US10594188B2 (en) * 2013-09-04 2020-03-17 Graco Minnesota Inc. Free wheeling motor fan
EP3042441B1 (en) * 2013-09-04 2020-12-23 Graco Minnesota Inc. Fan cooled motor with freewheeling fan
FR3010675A1 (en) * 2013-09-16 2015-03-20 Peugeot Citroen Automobiles Sa DEPRESSION PRODUCTION FOR A BRAKING EFFORT MULTIPLIER IN A GASOLINE MOTOR VEHICLE.

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)