EP1474303A1 - Procede de pilotage d un compresseur entraine par le moteur d un vehicule - Google Patents
Procede de pilotage d un compresseur entraine par le moteur d un vehiculeInfo
- Publication number
- EP1474303A1 EP1474303A1 EP03739518A EP03739518A EP1474303A1 EP 1474303 A1 EP1474303 A1 EP 1474303A1 EP 03739518 A EP03739518 A EP 03739518A EP 03739518 A EP03739518 A EP 03739518A EP 1474303 A1 EP1474303 A1 EP 1474303A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- pressure
- vehicle
- speed
- engine
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
Definitions
- the invention relates to the field of the automobile industry in the broad sense, and more specifically to the sector of industrial vehicles whose braking uses pneumatic means.
- the invention relates more precisely to a method for controlling the air compressor which is driven by the vehicle engine, and which supplies the compressed air tank or tanks.
- the method according to the invention makes it possible in particular to optimize the production of compressed air as a function in particular of the different operating modes of the vehicle.
- trucks or more generally industrial vehicles have a braking system which uses pneumatic energy.
- the engine drives an air compressor associated therewith, which delivers a quantity of pressurized air to one or more storage tanks.
- These compressed air reservoirs in turn supply the braking circuit as well as other specific circuits ensuring particular functions.
- the control of the compressor is carried out by mechanical means associated with the compressor. More precisely, the compressor delivers compressed air to a regulation and distribution module comprising mechanical-pneumatic members which interfere with the configuration of the pneumatic circuit of the compressor.
- this regulation module is arranged so that the compressor stops supplying pressurized air when the pressure in the tank reaches a predetermined threshold, called "disjunction threshold". In practice, this disjunction can be obtained by venting the exhaust of the compressor. In more sophisticated systems, the disjunction is obtained by connecting the intake and exhaust of the compressor. Conversely, the compressor resumes delivering pressurized air when the pressure in the tank reaches a low threshold, called “conjunction pressure". In this case, the regulation and distribution module provides the link between the compressor exhaust and the tanks.
- the thresholds of conjunction and disjunction are generally fixed by construction of the regulation and distribution module, and more precisely by the adjustment of different valves, springs, valves and other section ratios.
- the pressure setpoint is set at a lower level so as to limit the fuel consumption.
- the pressure setpoint is fixed to ensure a production of compressed air sufficient for the braking functions in particular to be correctly ensured.
- air suspension systems are used in two different modes depending on whether the speed is high or low. Thus, when the speed is low, the air suspension system can adjust the altitude of the chassis. This regulating function requires a relatively high pressure level to obtain satisfactory response times. The chassis altitude is not adjusted at high speed, so the pressure level that is required at high speed is lower than the pressure level required at low speed.
- the objective of the invention is to take account of these different modes of operation in order to optimize the value of the pressure setpoint delivered to the compressor.
- the invention therefore relates to a method for controlling a compressor driven by the engine of a vehicle, and which supplies at least one reservoir of compressed air.
- the compressor can be activated or deactivated as a function of the comparison of the value of the pressure in the reservoir (s) with respect to different predetermined conjunction and disjunction thresholds. These predetermined thresholds can be a function of the sign of the engine torque in particular.
- the thresholds of conjunction and disjunction pressure are multiple and determined as a function of the measurement or of the estimation of the vehicle speed.
- the pressure delivered by the compressor varies with the speed of the vehicle.
- the setpoint that is to say the thresholds of conjunction and disjunction of the compressor, are different depending on whether the vehicle is at low or high speed.
- the pressure of the air coming from the compressor is regulated within ranges of values which are different as a function of the speed and of the engine torque.
- the pressure thresholds can be determined by comparing the vehicle speed with a predetermined speed threshold.
- the pressure setpoint range that is to say the thresholds of conjunction and disjunction of the compressor are fixed at a first pair of values.
- the conjunction and disjunction thresholds are then fixed at a couple of different values.
- the pressure thresholds are fixed at higher values when the vehicle speed is lower than the predetermined speed threshold.
- the pressure delivered by the compressor is higher when the vehicle is at low speed, which allows a supply of the reservoir at a sufficient pressure to ensure optimal operation of the various systems, in particular pneumatic suspension systems ensuring altitude control. of the chassis.
- the energy consumption of the compressor is greater at low speed, a range in which the heat engine does not operate at full speed, so that this additional consumption does not disturb the operation of the vehicle.
- the pressure is regulated in the highest possible range of values, to take full advantage of the possibility of using part of the energy of the heat engine without influencing the traction performance, and thus benefit from maximum pneumatic energy reserve.
- the pressure is regulated within a lower value range, so that the consumption of the compressor is slightly reduced, and does not reduce the power available for the traction function too much.
- the speed threshold making it possible to differentiate the two operating modes of the compressor can be advantageously chosen as being the speed threshold beyond which the specific altitude control function of the chassis of the air suspension system is inhibited.
- the high pressure threshold determined when the torque is positive and the speed below the predefined speed threshold can be identical to the high pressure threshold determined when the torque is negative.
- the compressor cut-off threshold can be the same for the energy recovery phases in engine brake, and for the traction phases at low speed.
- the invention therefore also relates to a device for regulating a compressor, driven by the engine of a vehicle and supplying one or more compressed air tanks.
- Such a device comprises:
- the device also comprises means for evaluating or estimating the speed of the vehicle and means for varying the predetermined pressure thresholds in the range where the engine torque is positive.
- the various predetermined pressure thresholds are set in software.
- An electronic control unit regulates and controls the compressor and is informed of the vehicle speed and the engine torque, in order to adjust the thresholds according to the invention.
- FIG. 1 is a diagram illustrating the various elements involved in the process according to the invention.
- FIG. 2 is a diagram illustrating the evolution over time of the speed and of the pressure delivered by the compressor, as a function of the different operating phases.
- FIG. 1 illustrates a particular but non-limiting example of embodiment implementing the method according to the invention.
- the compressor (1) which delivers compressed air to a regulation and distribution module (9), on which is mounted the desiccant cartridge (2).
- This compressor (1) is driven by the motor (3).
- the interaction between the control module (9) and the compressor (1) is represented by the arrow (13).
- the configuration of the pneumatic circuit connected to the compressor, and in particular the action on the exhaust of the compressor is carried out by various control means, and in particular pneumatic or electric.
- the regulation and distribution module (9) delivers compressed air through the pipes (4) to one or more tanks (5), the number of which can vary depending on the vehicle, without departing from the scope of the invention.
- These tanks (5) are connected to different circuits shown diagrammatically. It may be the braking circuit (6) as well as the supply circuit of the air suspension system (7) or the supply of compressed air to the trailer.
- the tanks can also supply other pneumatic circuits (8) providing different functions, among which the parking brake or parking brake can be cited, as well as various service systems connected to the gearbox or clutch mechanism.
- the control of the compressor (1) is ensured by means of an electronic control unit (10) which can form a fully-fledged element, ensuring only the management and operation of the compressor, but which can also be integrated into a more global system ensuring the electronic management of other functions within the vehicle.
- the electronic control unit is mounted on the regulation and distribution module (9). However, the electronic control unit can also be geographically distant from the module (9).
- this electronic control unit has several electrical outputs (11) delivering electrical signals to the compressor (1). These two electrical outputs allow the compressor to be informed of the pressure threshold levels corresponding to the compressor cut-off and conjunction thresholds.
- Other modes of communication between the compressor and the control unit (10) can be envisaged.
- the pressure thresholds corresponding to the different operating modes can be programmed within the compressor by mechanical constructive arrangements.
- the control unit can inform the compressor of the current regulation mode, thus passing binary type information between the control unit (10) and the compressor (1).
- Communication between the electronic control unit and the regulation module (9) is not limited to the exchange of signals of an electrical nature, but the invention also covers variants using pneumatic or other signals.
- the vehicle includes a computer bus (12) through which various information exchanged between the control units present in the vehicle.
- information relating to the speed as well as to the sign of the engine torque (3) can be routed via this bus (12) to the control unit command (10) ensuring the regulation of the compressor.
- the tanks (5) are designed to work up to stabilized pressures of the order of 12.5 bars.
- the pneumatic energy requirements of the various elements consuming compressed air are variable.
- the circuit ensuring the braking of the various axles of the trailer generally operates at a pressure of the order of 8.5 bars maximum.
- the air suspension system (7) operates with a maximum pressure of the order of 12.5 bars.
- This pressure is required for the operation of the suspension system in order to control the altitude of the chassis, also known as the "raise and lower" system of the chassis.
- This function is used in particular during trailer connection and docking operations.
- This chassis altitude control function is inhibited when the vehicle is in motion, and its speed is greater than a predetermined threshold, typically close to 10 km / h. Above this speed, the air suspension system provides level control of low amplitude, and an air pressure below 10 bars is then sufficient.
- the various easements generally operate at maximum pressures of the order of 8.5 bars.
- the compressed air supply to the trailer is also carried out at a pressure of around 8.5 bars.
- FIG. 2 illustrates the evolution of the different set point thresholds applied to the compressor as a function of the operating phases.
- the compressor is controlled so that the pressure thresholds are relatively high. Specifically, the compressor is driven so that the pressure can rise up to the high cut-out value (D H ) close to 12.5 bars. As soon as the pressure reaches (D H ), the compressor is cut out.
- a regeneration phase of the desiccant cartridge (2) is automatically started. This regeneration consumes a quantity of compressed air which results in a slight decrease in pressure. Depending on the air consumption of the different systems (6, 7, 8) the pressure continues to decrease slightly. As soon as the pressure reaches the low threshold, corresponding to the cut-off threshold, the compressor is then reactivated, so that the compression re-increases.
- This "low speed” operating mode continues after the vehicle has started, corresponding to time t l5 , as long as the speed remains below the predetermined threshold V 0 .
- the pressure thresholds are then automatically modified to lower values (D B , C B ) corresponding to operation in "high speed” mode.
- the pressure is then regulated analogously to the mode mentioned above, in the range defined between the two values D B and C B.
- the engine torque becomes negative, corresponding to a braking phase by engine brake.
- the fuel injection rate is zero.
- the electronic control unit (10) analyzes this information and modifies the pressure regulation thresholds accordingly to operate the compressor in "energy recovery” mode.
- the new pressure setpoint is fixed at a value D H corresponding to the cut-off threshold for the "low speed” mode described above.
- this pressure setpoint could be set at a different value without departing from the scope of the invention.
- the compressor is cut out during the regeneration phase of the desiccant cartridge (2).
- the compressor is then re-activated so that the pressure reaches the high threshold D H and this as long as the system is in "energy recovery" mode.
- the pressure in the air tank is then kept at a maximum level without the engine consuming fuel. It will be observed that advantageously, the energy consumed by the compressor contributes to the slowing down of the vehicle. In this engine braking phase, the various pneumatic systems (6, 7, 8) can consume compressed air, which lowers the pressure in the tanks (5).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Vehicle Body Suspensions (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air-Conditioning For Vehicles (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0201834A FR2835787B1 (fr) | 2002-02-14 | 2002-02-14 | Procede de pilotage d'un compresseur entraine par le moteur d'un vehicule |
| FR0201834 | 2002-02-14 | ||
| PCT/FR2003/000421 WO2003068548A1 (fr) | 2002-02-14 | 2003-02-11 | Procede de pilotage d'un compresseur entraine par le moteur d'un vehicule |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1474303A1 true EP1474303A1 (fr) | 2004-11-10 |
| EP1474303B1 EP1474303B1 (fr) | 2006-08-30 |
Family
ID=27620206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03739518A Expired - Lifetime EP1474303B1 (fr) | 2002-02-14 | 2003-02-11 | Procede de pilotage d un compresseur entraine par le moteur d un vehicule |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7062366B2 (fr) |
| EP (1) | EP1474303B1 (fr) |
| AT (1) | ATE337936T1 (fr) |
| AU (1) | AU2003226870A1 (fr) |
| DE (1) | DE60307984T2 (fr) |
| FR (1) | FR2835787B1 (fr) |
| WO (1) | WO2003068548A1 (fr) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004059834A1 (de) * | 2004-12-10 | 2006-06-14 | Voith Turbo Gmbh & Co. Kg | Verfahren zum Regeln eines Druckluftversorgungssystems eines Kraftfahrzeugs |
| US7976285B2 (en) * | 2006-06-05 | 2011-07-12 | Paccar Inc | Electronic control for heavy duty truck compressed air charging system |
| DE102006054813A1 (de) | 2006-11-22 | 2008-05-29 | Wabco Gmbh | Verfahren zur Druckluftversorgung in einem Fahrzeug |
| US8387731B2 (en) * | 2007-08-27 | 2013-03-05 | Parker-Hannifin Corporation | Control apparatus and method for operating a combined hybrid drive and brake system |
| US9688260B2 (en) * | 2008-11-28 | 2017-06-27 | Volvo Truck Corporation | Vehicle comprising an air compressor system and method for operating a vehicle air compressor system |
| DE102009017903A1 (de) * | 2009-04-17 | 2010-10-21 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Druckluftversorgungssystem für ein Kraftfahrzeug |
| DE102009050720B4 (de) * | 2009-10-26 | 2012-09-20 | Bombardier Transportation Gmbh | Steuervorrichtung für eine Kompressoreinrichtung |
| US20120107138A1 (en) * | 2010-10-28 | 2012-05-03 | Detroit Diesel Corporation | Method to operate an electronically controlled air compressor powered by an internal combustion engine |
| JP5679554B2 (ja) * | 2010-12-07 | 2015-03-04 | Udトラックス株式会社 | エアコンプレッサ装置 |
| DE102011100512A1 (de) * | 2011-05-05 | 2012-11-08 | Wabco Gmbh | Steuereinrichtung für eine Luftbeschaffungsanlage und Verfahren zum Steuern oder Regeln einer Luftbeschaffungsanlage |
| US20130204490A1 (en) * | 2012-02-08 | 2013-08-08 | Bendix Commercial Vehicle Systems Llc | Uphill vehicle orientation adjusted compressor control |
| US9926924B2 (en) * | 2014-04-08 | 2018-03-27 | Iveco S.P.A. | System for managing a vehicle compressor |
| JP7010578B2 (ja) * | 2015-08-07 | 2022-01-26 | マックス株式会社 | エアコンプレッサ |
| GB201518409D0 (en) * | 2015-10-18 | 2015-12-02 | Alexander Dennis Ltd | Compressed air systems and methods |
| DE102016011011A1 (de) | 2016-09-09 | 2018-03-15 | Faun Umwelttechnik Gmbh & Co. Kg | Energierückgewinnungsvorrichtung für Nutzfahrzeuge mit Druckluftbremsanlage |
| US11370405B2 (en) | 2019-11-19 | 2022-06-28 | Bendix Commercial Vehicle Systems Llc | System, controller and method for air charging |
| DE102020100296A1 (de) * | 2020-01-09 | 2021-07-15 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Kompressorsystem und Verfahren zum Betreiben eines Kompressorsystems in Abhängigkeit des Druckluftbedarfs eines Betriebszustands des Fahrzeugs |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5812861A (ja) * | 1981-07-17 | 1983-01-25 | Diesel Kiki Co Ltd | 自動車用エア配管系の圧力制御装置 |
| US5103576A (en) * | 1989-01-26 | 1992-04-14 | Allied Signal Inc. | Charge/purge control system for air dryer with humidity control |
| SE507152C2 (sv) * | 1996-08-22 | 1998-04-06 | Volvo Lastvagnar Ab | Anordning och förfarande för reglering av luftkompressor |
| SE508156C2 (sv) * | 1996-10-18 | 1998-09-07 | Volvo Lastvagnar Ab | System och metod för reglering av inkopplingen av hjälputrustning driven av en motor |
| US5951260A (en) * | 1997-05-01 | 1999-09-14 | Cummins Engine Company, Inc. | System and method for electronic air compressor control |
| US6036449A (en) * | 1998-03-24 | 2000-03-14 | Cummins Engine Company, Inc. | Air compressor control |
| DE19813672C1 (de) * | 1998-03-27 | 1999-05-20 | Daimler Chrysler Ag | Luftfederungsanlage für Fahrzeuge |
| GB9912681D0 (en) * | 1999-06-02 | 1999-07-28 | Wabco Automotive Uk | Vehicle air braking systems |
| US6682459B1 (en) * | 2000-08-08 | 2004-01-27 | Bendix Commercial Vehicle Systems Llc | Electronic air charge controller for vehicular compressed air system |
-
2002
- 2002-02-14 FR FR0201834A patent/FR2835787B1/fr not_active Expired - Fee Related
-
2003
- 2003-02-11 DE DE60307984T patent/DE60307984T2/de not_active Expired - Lifetime
- 2003-02-11 AT AT03739518T patent/ATE337936T1/de not_active IP Right Cessation
- 2003-02-11 EP EP03739518A patent/EP1474303B1/fr not_active Expired - Lifetime
- 2003-02-11 WO PCT/FR2003/000421 patent/WO2003068548A1/fr not_active Ceased
- 2003-02-11 AU AU2003226870A patent/AU2003226870A1/en not_active Abandoned
-
2004
- 2004-07-22 US US10/897,138 patent/US7062366B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03068548A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2835787B1 (fr) | 2004-10-22 |
| AU2003226870A1 (en) | 2003-09-04 |
| ATE337936T1 (de) | 2006-09-15 |
| FR2835787A1 (fr) | 2003-08-15 |
| US20040260441A1 (en) | 2004-12-23 |
| WO2003068548A1 (fr) | 2003-08-21 |
| DE60307984D1 (de) | 2006-10-12 |
| EP1474303B1 (fr) | 2006-08-30 |
| US7062366B2 (en) | 2006-06-13 |
| DE60307984T2 (de) | 2007-03-15 |
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