GB2533035A - Ancillary drive for an internal combustion engine as well as method for operating such an ancillary drive - Google Patents

Ancillary drive for an internal combustion engine as well as method for operating such an ancillary drive Download PDF

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Publication number
GB2533035A
GB2533035A GB1519209.9A GB201519209A GB2533035A GB 2533035 A GB2533035 A GB 2533035A GB 201519209 A GB201519209 A GB 201519209A GB 2533035 A GB2533035 A GB 2533035A
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GB
United Kingdom
Prior art keywords
drive
ancillary
wheel
clutch
compressor
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Withdrawn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
GB1519209.9A
Other versions
GB201519209D0 (en
Inventor
Geary Ryan
Norlin Michael
James Rotz Derek
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 Daimler AG filed Critical Daimler AG
Priority to GB1519209.9A priority Critical patent/GB2533035A/en
Publication of GB201519209D0 publication Critical patent/GB201519209D0/en
Publication of GB2533035A publication Critical patent/GB2533035A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B60K25/02—Auxiliary drives directly from an engine shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B60K2025/005—Auxiliary drives driven by electric motors forming part of the propulsion unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B60K25/02—Auxiliary drives directly from an engine shaft
    • B60K2025/022—Auxiliary drives directly from an engine shaft by a mechanical transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

An ancillary drive (10) for an internal combustion engine of a vehicle and a method of for operating such a drive are provided. The ancillary drive 10 comprises first and second drive planes 16, 18 and: a crankshaft wheel 14; a compressor wheel 20; an electric machine 24; a machine wheel 28; at least one ancillary unit wheel 30; a first clutch wheel 34; a second clutch wheel 36; a first traction mechanism 38; and a second traction mechanism 40.

Description

Ancillary Drive for an Internal Combustion Engine as well as Method for Operating such an Ancillary Drive The invention relates to an ancillary drive for an internal combustion engine as well as a method for operating such an ancillary drive.
Ancillary drives for internal combustion engines of vehicles are well-known from the general prior art. Such an ancillary drive is also referred to as an accessory drive or accessory drive system. The ancillary drive is a drive system configured to drive ancillary units which are also referred to as ancillaries or auxiliaries. For example, such an ancillary unit is a water pump which can be driven by the internal combustion engine via the ancillary drive. A further ancillary unit can be a compressor of an air-conditioning system, the compressor being configured to compress a refrigerant of the air-conditioning system, wherein the compressor can be driven by the internal combustion engine via the ancillary drive.
US 2013/0267363 Al shows an ancillary drive for an internal combustion engine, the ancillary drive comprising two parallel drive planes and a first crankshaft wheel that is adapted to be rotationally connected to a crankshaft of the internal combustion engine and is arranged in a first one of the drive planes. The ancillary drive further comprises a second crankshaft wheel that is adapted to be rotationally connected to the crankshaft and is arranged coaxially to the first crankshaft wheel in the second drive plane. The ancillary drive further comprises an electric machine that is selectively operable as a generator or as a motor, the electric machine having a machine shaft. Furthermore, the ancillary drive comprises a first machine shaft wheel that is rotationally connected to the machine shaft and is arranged in the first drive plane in order to be driven by the crankshaft in a generator mode of the electric machine. Moreover, the ancillary drive comprises a second machine shaft wheel that can be rotationally connected to the machine shaft and is arranged coaxially to the first machine shaft wheel in the second drive plane in order to drive the crankshaft in a motor mode of the electric machine.
Furthermore, the ancillary drive comprises an endlessly rotating first traction mechanism that wraps around the wheels arranged in the first drive plane. The ancillary drive further comprises an endlessly rotating second traction mechanism that wraps around the wheel is arranged in the second drive plane. A first coupling is arranged in the first drive plane and allows the machine shaft to be taken over relative to the crankshaft. Moreover, a second coupling is arranged in the second drive plane and allows the crankshaft to be taken over relative to the machine shaft. The second coupling is a free wheel coupling that is arranged, in terms of the drive, between the second crankshaft wheel and the crankshaft and allows the crankshaft to be taken over relative to the second crankshaft wheel.
Furthermore, DE 10 2010 054 629 Al shows an ancillary drive of an internal combustion engine, the ancillary drive comprising a first drive wheel that is adapted to be rotationally connected to a crankshaft of the internal combustion engine.
Additionally, DE 100 11 343 Al shows an ancillary drive which is also referred to as an auxiliary drive device having a clutch for coupling the auxiliary drive device to a drive output shaft of an internal combustion engine.
It is an object of the present invention to provide an ancillary drive as well as a method by means of which ancillary units of a vehicle can be driven in a particularly efficient manner.
This object is solved by an ancillary drive having the features of patent claim 1 as well as the method having the features of patent claim 5. Advantageous embodiments with expedient developments of the invention are indicated in the other patent claims.
A first aspect of the present invention relates to an ancillary drive for an internal combustion engine of a vehicle, in particular a commercial vehicle such as a truck. The ancillary drive comprises a first drive plane and a second drive plane. Moreover, the ancillary drive comprises a crankshaft wheel configured to be connected to a crankshaft of the internal combustion engine in a rotationally fixed manner, wherein the crankshaft wheel is arranged in the first drive plane. The ancillary drive further comprises a compressor wheel configured to be connected, in a rotationally fixed manner, to a compressor shaft of a compressor for compressing a refrigerant of an air-conditioning system of the vehicle, the compressor wheel being arranged in the second drive plane. The air-conditioning system is also referred to as HVAC (Heating, Ventilating, and Air Conditioning), wherein the air-conditioning system is configured to cool air to be fed into the interior of the vehicle.
Moreover, the ancillary drive according to the present invention comprises an electric machine which is selectively operable as a generator or a motor, wherein the electric machine comprises a machine shaft. In other words, the electric machine can be operated in a motor mode in which the electric machine acts as a motor in the form of an electric motor. Moreover, the electric machine can be operated in a generator mode in which the electric machine acts as a generator. The ancillary drive further comprises a machine wheel connected to the machine shaft in a rotationally fixed manner, wherein the machine wheel is arranged in the second drive plane. Moreover, the ancillary drive comprises at least one ancillary unit wheel configured to be connected, in a rotationally fixed manner, to an ancillary unit shaft of an ancillary unit being different from the electric machine and the compressor, wherein the ancillary unit wheel is arranged in the first drive plane. For example, the ancillary unit is a water pump configured to convey water, wherein, for example, said water serves to cool the internal combustion engine. Additionally, the ancillary drive comprises a first clutch wheel arranged in the first drive plane. A second clutch wheel of the ancillary drive is arranged in the second drive plane, wherein the second clutch wheel is coaxially arranged in relation to the first clutch wheel. The ancillary drive according to the present invention further comprises a first traction mechanism wrapping around the wheels arranged in the first drive plane. A second traction mechanism of the ancillary drive wraps around the wheels arranged in the second drive plane. The respective traction mechanism is also referred to as traction means. For example, the respective traction mechanism can be configured as a belt or a chain.
Furthermore, the ancillary drive according to the present invention comprises a clutch configured to selectively couple and decouple the clutch wheels. This means the clutch wheels can be connected with each other in a rotationally fixed manner by means of the clutch. Moreover, the clutch wheels can be decoupled from each other so that, for example, the clutch wheels can rotate in relation to each other since, when the clutch wheels are decoupled from each other, the clutch wheels are not connected with each other in a rotationally fixed manner. For example, the wheels arranged in the first drive plane and the first traction mechanism form a first drive, wherein the wheels arranged in the second drive plane and the second traction mechanism form a second drive. The second drive can be selectively coupled to and decoupled from the first drive by means of the clutch. For example, the clutch can be opened and closed. When the clutch is open, the clutch wheels are decoupled from each other so that the second drive is decoupled from the first drive. When the clutch is closed the clutch wheels are connected with each other in a rotationally fixed manner so that the second drive is connected to the first drive and vice versa.
The electric machine is also referred to as a motor generator unit (MGU), wherein the MGU is integrated into the ancillary drive, in particular said second drive. Thus, the electric machine is a drive integrated, in particular belt integrated, MGU. Such a drive integrated MGU on a clutched circuit of an accessory drive arrangement allows isolated power transmission from the MGU to the compressor wheel and, thus, the compressor for, for example, engine-off air-conditioning system operation as well as coupled power transmission of the MGU to and from a battery bank to the complete ancillary drive and crankshaft so that, for example, a mild hybrid system of the vehicle can be realized. This means that, when the internal combustion engine is switched off, the compressor can be driven by the electric machine via the compressor shaft, the compressor wheel, the second traction mechanism and the machine wheel in such a way that the electric machine is operated in the motor mode and, thus, as a motor. Thereby, the interior of the vehicle can be supplied with air cooled by the air-conditioning system even when the internal combustion engine is switched off.
Since the second drive can be decoupled from the first drive, said ancillary unit and the crankshaft are not driven when the compressor is driven by the electric machine and when the clutch is open. Thus, a particularly efficient operation can be realized Currently, parked air conditioning is either accomplished by idling the internal combustion engine being a main engine and using a belt driven air-conditioning system or employing a secondary self-contained electrically powered system that adds cost and weight from its redundancy. Employing the clutch and the second drive being separate from the first drive helps minimize friction associated with rotating unneeded devices while providing air conditioning to the vehicle even when the vehicle is stationary, i.e. parked and the internal combustion engine is switched off. Thus, an elimination of redundant air conditioning system for parked HVAC can be realized.
A second aspect of the present invention relates to a method for operating the ancillary drive according to the present invention. Advantages and advantageous embodiments of the ancillary drive according to the present invention are to be regarded as advantages and advantageous embodiments of the method according to the present invention and vice versa.
Further advantages, features, and details of the invention derive from the following description of a preferred embodiment as well as from the drawing. The features and feature combinations previously mentioned in the description as well as the features and feature combinations mentioned in the following description of the figure and/or shown in the figure alone can be employed not only in the respectively indicated combination but also in any other combination or taken alone without leaving the scope of the invention.
The drawing shows in the only Fig. a schematic view of an ancillary drive for an internal combustion engine of a vehicle, by means of which ancillary drive a particularly efficient operation can be realized.
The Fig. shows in a schematic view an ancillary drive 10 for an internal combustion engine of a vehicle, in particular a commercial vehicle such as a truck. For example, the internal combustion engine is configured as a reciprocating piston engine and comprises an output shaft in the form of a crankshaft 12, wherein the internal combustion engine is configured to provide torques via the crankshaft 12. The vehicle can be driven by said torques so that the internal combustion engine is configured to drive the vehicle. The ancillary drive 10 comprises a crankshaft wheel 14 which is, in the present embodiment, connected to the crankshaft 12 in rotationally fixed manner. Thus, the crankshaft wheel 14 can be driven by the crankshaft 12 and vice versa.
Moreover, the ancillary drive 10 comprises a first drive plane 16 and a second drive plane 18, wherein, for example, the drive planes 16 and 18 are arranged in parallel to each other. Preferably, the drive planes 16 and 18 are arranged in front of the internal combustion engine with respect to the longitudinal extension and, thus, the axial direction of the crankshaft 12. Thus, the ancillary drive 10 is a front end accessory drive (FEAD) system. A can be seen from the Fig., the crankshaft wheel 14 is arranged in the first drive plane 16.
The ancillary drive 10 further comprises a compressor wheel 20 which is connected to a compressor shaft 22 in a rotationally fixed manner. The compressor shaft 22 is a shaft of a compressor being a component of an air-conditioning system of the vehicle. The compressor is configured to compress a refrigerant of the air-conditioning system so that, by means of the refrigerant, air can be cooled. The compressor shaft 22 and, thus, the compressor can be driven via the compressor wheel 20. The air cooled by the air-conditioning system can be fed into the interior of the vehicle, in particular into the interior of a driver's cab of the commercial vehicle so that the interior of the driver's cab can be supplied with air cooled by the air-conditioning system. The compressor wheel 20 is arranged in the second drive plane 18.
The ancillary drive 10 further comprises an electric machine 24 which is selectively operable as a generator or a motor. This means the electric machine 24 can be operated in a motor mode in which the electric machine 24 acts as a motor in the form of an electric motor. Moreover, the electric machine 24 can be operated in a generator mode in which the electric machine 24 acts as a generator. The electric machine 24 has a machine shaft 26, wherein a machine wheel 28 of the ancillary drive 10 is connected to the machine shaft 26 in a rotationally fixed manner. Thus, in the generator mode, the machine shaft 26 and, thus, the electric machine 24 can be driven by the machine wheel 28. Moreover, in the motor mode, the machine wheel 28 can be driven by the electric machine 24 via the machine shaft 26. As can be seen from the Fig., the machine wheel 28 is arranged in the second drive plane 18.
Additionally, the ancillary drive 10 comprises at least one ancillary unit wheel 30 which is connected to an ancillary unit shaft 32 of an ancillary unit being different from the electric machine 24 and the compressor. In the present embodiment said ancillary unit is a water pump configured to convey water by means of which the internal combustion engine can be cooled. Thus, the ancillary unit shaft 32 and, thus, the water pump can be driven by the ancillary unit wheel 30 which is also referred to as a water pump wheel. As can be seen form the Fig., the ancillary unit wheel 30 is arranged in the first drive plane 16.
The ancillary drive 10 further comprises a first clutch wheel 34 arranged in the first drive plane 16. Moreover, the ancillary drive 10 comprises a second clutch wheel 36 arranged in the second drive plane 18. Moreover, the second clutch wheel 36 is arranged coaxially in relation to the first clutch wheel 34.
Moreover, the ancillary drive 10 comprises a first traction mechanism 38 which is also referred to as a first traction means, wherein the first traction mechanism 38 wraps around the wheels 14, 30 and 34 arranged in the first drive plane 16. Additionally, the ancillary drive 10 comprises a second traction mechanism 40 which is also referred to as a second tractions means. The second traction mechanism 40 wraps around the wheels 20, 28 and 36 arranged in the second drive plane 18. Thus, the wheels 14, 30 and 34 arranged in the first drive plane 16 are coupled or connected which each other by the first traction mechanism 38. Moreover, the wheels 20, 28 and 36 arranged in the second drive plane 18 are connected or coupled with each other by the second traction mechanism 40. For example, the respective traction mechanisms 38 and 40 are belts so that the ancillary drive 10 is configured as a belt drive or belt drive arrangement. Thus, the wheels 14, 20, 28 and 30 are configured as pulleys. Moreover, for example, the clutch wheels 34 and 36 form a dual pulley or a dual idler.
Since the electric machine 24 is selectively operable as motor or a generator the electric machine 24 is also referred to as a motor generator unit (MGU). Moreover, the ancillary drive 10 comprises first tensioning wheels 42 and 44 arranged in the first drive plane 16, wherein the first tensioning wheels 42 and 44 are configured to tension the first traction mechanism 38. Moreover, the ancillary drive 10 comprises second tensioning wheels 46 and 47 arranged in the second drive plane 18 so that the second traction mechanism 40 is tensioned by means of the second tensioning wheels 46 and 47.
Furthermore, the ancillary drive 10 comprises a first clutch 48 which is configured as, for example, a magnetic or pneumatic clutch. The first clutch 48 is configured to selectively couple and decouple the clutch wheels 34 and 36. For example, the first clutch 48 can be opened and closed. When the first clutch 48 is open the clutch wheel 34 is decoupled from the clutch wheel 36 and vice versa. Thus, the clutch wheels 34 and 36 can rotate in relation to each other. When the first clutch 48 is closed the clutch wheel 34 is connected to the clutch wheel 36 in a rotationally fixed manner and vice versa. Thus, the clutch wheel 36 can be driven by the clutch wheel 34 and vice versa. For example, the wheels 14, 30 and 34 arranged in the first drive plane 16 form a first drive 50 being a first belt drive. Moreover, for example, the wheels 20, 28 and 36 arranged in the second drive plane 18 form a second drive 52 being a second belt drive. Said drives 50 and 52 can be selectively coupled and decoupled by means of the first clutch 48. When the first clutch 48 is open the second driven 52 is decoupled from the first drive 50 and vice versa. However, when the first clutch 48 is closed the second drive 52 is connected to the first drive 50 and vice versa so that, for example, the second drive 52 can be driven by the first drive 50 or vice versa. Thus, the ancillary drive 10 can be operated particularly efficiently and in a need-based manner.
A conventional belt drive arrangement is unable to maintain interior climate comfort levels while the internal combustion engine is switched off because the compressor of the air-conditioning system is located on the front end accessory drive system and does not run while the internal combustion engine is switched off or shut-off. This interior comfort issue can be overcome by the ancillary drive 10 by providing a means for driving the compressor while the internal combustion engine is switched off, i.e. not spinning. Said means is the MGU (electric machine 24) integrated into the FEAD, in particular the second drive 52. Thus, the MGU is a belt integrated MGU and connected to the front of the internal combustion engine and drives or is driven by the traction mechanism 40 that connects to the compressor and the clutched dual pulley. Thus, the second drive 52 is a separate belt circuit with respect to the first drive 50, wherein said separate belt circuit can be selectively engaged and disengaged. This provides several possible advantages: * Disengaged mode enables engine-off (parked) air-conditioning system operation.
* Disengaged mode enables compressor speed optimization by allowing the MGU to spin the compressor faster for increased cooling performance even if the internal combustion engine speed is lower than desired.
* Disengaged mode allows maximum engine power to be available to accelerate or hold vehicle speed on a grade by removing the parasitic loads and power consumption of the components on the separate belt circuit momentarily.
* Engaged mode allows for efficient input power to the compressor.
* Engaged mode allows the MGU to efficiently generate power to charge a battery bank of the vehicle.
* Engaged mode allows the MGU to send power into the belt drive system to boost vehicle performance by using stored electrical energy.
In order to activate the engaged mode the first clutch 48 is closed. Thus, the second drive 52 can be driven by the first drive 50 or drives the first drive 50. In order to activate the disengaged mode the first clutch 48 is opened. Thus, for example, the second drive 52 can work independently from the first drive 50.
In a method for operating the ancillary drive 10 control algorithms can be employed to power the MGU and match speeds of the concentric pulleys (clutch wheels 34 and 36) prior to clutch engagement to allow for reduced shock loads to the system thus improving noise, vibration and harshness attributes as well as improving system durability. For example, the clutch 48 is selectively opened and closed on the basis of at least one of: state of movement of the vehicle, operating state of the internal combustion engine, operating state of the air-conditioning system, and operating state of the electric machine 24.
Preferably, the ancillary drive 10 comprises a second clutch 54 which is configured as, for example, a magnetic or pneumatic clutch. The second clutch 54 is configured to selectively couple and decouple the compressor wheel 20 and the compressor shaft 22. Thus, for example, the electric machine 24 can be driven by the clutch wheel 36 or drive the clutch wheel 36 without influencing, in particular driving, the compressor.
List of reference signs ancillary drive 12 crankshaft 14 crankshaft wheel 16 first drive plane 18 second drive plane compressor wheel 22 compressor shaft 24 electric machine 26 machine shaft 28 machine wheel ancillary unit wheel 32 ancillary unit shaft 34 first clutch wheel 36 second clutch wheel 38 first traction mechanism second traction mechanism 42 first tensioning wheel 44 first tensioning wheel 46 second tensioning wheel 47 second tensioning wheel 48 first clutch first drive 52 second drive 54 second clutch

Claims (6)

  1. Claims 1. An ancillary drive (10) for an internal combustion engine of a vehicle, the ancillary drive (10) comprising a first and a second drive planes (16, 18) and: a crankshaft wheel (14) configured to be connected to a crankshaft (12) of the internal combustion engine in a rotationally fixed manner, the crankshaft wheel (14) being arranged in the first drive plane (16), a compressor wheel (20) configured to be connected, in a rotationally fixed manner, to a compressor shaft (22) of a compressor for compressing a refrigerant of an air-conditioning system of the vehicle, the compressor wheel (20) being arranged in the second drive plane (18), an electric machine (24) selectively operable as a generator or a motor, the electric machine (24) having a machine shaft (26), a machine wheel (28) connected to the machine shaft (26) in a rotationally fixed manner, the machine wheel (28) being arranged in the second drive plane (18), at least one ancillary unit wheel (30) configured to be connected, in a rotationally fixed manner, to an ancillary unit shaft (32) of an ancillary unit being different from the electric machine (24) and the compressor, the ancillary unit wheel (30) being arranged in the first drive plane (16), a first clutch wheel (34) arranged in the first drive plane (16), a second clutch wheel (36) arranged in the second drive plane (18) and coaxially arranged in relation to the first clutch wheel (34), a first traction mechanism (38) wrapping around the wheels (14, 30, 34) arranged in the first drive plane (16), a second traction mechanism (40) wrapping around the wheels (20, 28, 36) arranged in the second drive plane (18), and -a clutch (48) configured to selectively couple and decouple the clutch wheels (34, 36).
  2. 2. The ancillary drive (10) according to claim 1, wherein the ancillary unit is a water pump.
  3. 3. The ancillary drive (10) according to claim 1 or 2, wherein the ancillary drive (10) comprises a second clutch (54) configured to couple and decouple the compressor wheel (20) and the compressor shaft (22).
  4. 4. The ancillary drive (10) according to any one of the preceding claims, wherein the clutch (48, 54) is configured as a magnetic or pneumatic clutch.
  5. 5. A method for operating the ancillary drive (10) according to any one of the preceding claims.
  6. 6. The method according to claim 5, wherein the clutch (48) for coupling and decoupling the clutch wheels (34, 36) is selectively opened and closed on the basis of at least one of: state of movement of the vehicle, operating state of the internal combustion engine, operating state of the air-conditioning system, and operating state of the electric machine (24).
GB1519209.9A 2015-10-30 2015-10-30 Ancillary drive for an internal combustion engine as well as method for operating such an ancillary drive Withdrawn GB2533035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1519209.9A GB2533035A (en) 2015-10-30 2015-10-30 Ancillary drive for an internal combustion engine as well as method for operating such an ancillary drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1519209.9A GB2533035A (en) 2015-10-30 2015-10-30 Ancillary drive for an internal combustion engine as well as method for operating such an ancillary drive

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GB201519209D0 GB201519209D0 (en) 2015-12-16
GB2533035A true GB2533035A (en) 2016-06-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11441481B2 (en) 2018-05-24 2022-09-13 Ford Global Technologies, Llc Mechanism for a two-speed engine accessory drive system in a vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080318729A1 (en) * 2007-06-21 2008-12-25 Mitsubishi Electric Corporation Automotive drive apparatus
US20090255741A1 (en) * 2008-04-15 2009-10-15 Gm Global Technology Operations, Inc. Belt alternator starter systems for hybrid vehicles
US20090298646A1 (en) * 2008-05-27 2009-12-03 Scott Parsons Engine powered device having accessory drive and reversing motor for selectively starting engine and powering accessory drive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080318729A1 (en) * 2007-06-21 2008-12-25 Mitsubishi Electric Corporation Automotive drive apparatus
US20090255741A1 (en) * 2008-04-15 2009-10-15 Gm Global Technology Operations, Inc. Belt alternator starter systems for hybrid vehicles
US20090298646A1 (en) * 2008-05-27 2009-12-03 Scott Parsons Engine powered device having accessory drive and reversing motor for selectively starting engine and powering accessory drive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11441481B2 (en) 2018-05-24 2022-09-13 Ford Global Technologies, Llc Mechanism for a two-speed engine accessory drive system in a vehicle

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