EP3084274A1 - Procédé et dispositif de contrôle de la recharge d'un accumulateur hydraulique d'une boîte de vitesses pilotée, en fonction de la pression - Google Patents
Procédé et dispositif de contrôle de la recharge d'un accumulateur hydraulique d'une boîte de vitesses pilotée, en fonction de la pressionInfo
- Publication number
- EP3084274A1 EP3084274A1 EP14803183.4A EP14803183A EP3084274A1 EP 3084274 A1 EP3084274 A1 EP 3084274A1 EP 14803183 A EP14803183 A EP 14803183A EP 3084274 A1 EP3084274 A1 EP 3084274A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- threshold
- hydraulic accumulator
- vehicle
- pressure
- recharging
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
- F16H61/0031—Supply of control fluid; Pumps therefore using auxiliary pumps, e.g. pump driven by a different power source than the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H2061/0034—Accumulators for fluid pressure supply; Control thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
- F16H2061/305—Accumulators for fluid supply to the servo motors, or control thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2312/00—Driving activities
- F16H2312/14—Going to, or coming from standby operation, e.g. for engine start-stop operation at traffic lights
Definitions
- the invention relates to vehicles comprising a heat engine coupled to a controlled gearbox, and more specifically the control of the operation of recharging means of a hydraulic accumulator of a hydraulic motor of such a controlled gearbox.
- controlled gearbox means any gearbox whose operation is controlled by a computer or supervisor and whose gearshift (or ratio) is provided by an electrohydraulic actuator. Therefore, it may be, for example, an automatic transmission, a manual gearbox or a gearbox dual clutch (or DCT).
- the controlled gearboxes generally comprise a hydraulic actuator responsible for moving on demand their shift forks.
- this electro-hydraulic actuator In order for this electro-hydraulic actuator to operate, it must be powered by a hydraulic accumulator whose pressure is controlled by recharging means comprising a hydraulic pump actuated by an electric motor.
- the hydraulic pump When the pressure in the hydraulic accumulator is below a predefined minimum pressure, the hydraulic pump is operated by means of an electric motor to raise it, and when the pressure in the hydraulic accumulator exceeds a predefined maximum pressure. the operation of the hydraulic pump is interrupted.
- This procedure of recharging the hydraulic accumulator is always operational when the starting function of the vehicle (allowing the engine to operate) is activated, for example by means of a "start key (or contact)". As soon as this start function is deactivated, the charging procedure is stopped. This mode of This results from the fact that in a vehicle with a controlled gearbox, the latter is always active, because as soon as the driver wants it, the clutch and gearshift must be immediately operational.
- This charging procedure can be troublesome in terms of hearing when the vehicle can operate in a first mode in which its thermal engine is respectively in operation or in a second mode in which its engine is stopped. This is particularly the case for vehicles with a stop and restart control system
- the driver may fear that there is a malfunction in his vehicle, particularly during the "inaction" phases in which it is substantially at a standstill with its engine stopped by the STT system (such as when stopping at a traffic light or in a traffic jam).
- This fear is all the more understandable as the noise of the recharge is quite acute, and similar to that of a siren, which is very far from a running engine noise, and apparently occurs. random (but in reality depending on the pressure in the hydraulic accumulator).
- the driver may be tempted to return his vehicle to his dealer for examination, which causes him to waste time and possibly money.
- the invention therefore aims to improve the situation.
- This method comprises a step in which, in the presence of a need for recharging the hydraulic accumulator resulting from detection in the latter of a pressure lower than a first predefined threshold, it is expected that the pressure becomes less than a second predefined threshold,
- the charging means is actuated so that the pressure of the hydraulic accumulator becomes greater than a third predefined threshold, strictly greater than the first threshold.
- the method according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
- the third and fourth thresholds may be identical;
- the fourth threshold may be strictly less than the third threshold.
- the invention also proposes a device for controlling the operation of recharging means of a hydraulic accumulator of a hydraulic actuator of a gearbox driven by a vehicle comprising a heat engine and adapted to operate in first and second modes in which the engine is respectively in
- This device is arranged, in the presence of a need for recharging the hydraulic accumulator resulting from a detection in the latter of a pressure lower than a first predefined threshold, to wait for the pressure to become lower than a second predefined threshold, strictly lower than
- first threshold when the vehicle is in the second mode, then to trigger an actuation of the recharging means so that the pressure of the hydraulic accumulator becomes greater than a third predefined threshold, strictly greater than the first threshold.
- This device can also be arranged, in the presence of a need for
- the invention also proposes a calculator comprising a control device of the type of that presented above.
- the invention also proposes a vehicle, possibly of automobile type, comprising a calculator of the type of that presented above, and
- a heat engine coupled to a controlled gearbox and comprising a hydraulic motor coupled to a hydraulic accumulator, itself coupled to recharging means, and adapted to operate in first and second modes in which the engine is respectively in operation and stopped.
- the object of the invention is notably to propose a method, and an associated device, for controlling the operation of recharging means of a hydraulic accumulator of a hydraulic actuator of a controlled gearbox of a vehicle.
- the gearbox is part of a vehicle-type vehicle, such as a car. But the invention is not limited to this type of vehicle. It concerns any vehicle that can be driven by a driver, including a heat engine coupled to a gearbox.
- the invention particularly relates to land vehicles (cars, motorcycles, commercial vehicles, coaches (or buses), trucks, road vehicles, construction machinery, handling equipment, and trains), and vehicles
- the vehicle comprises a conventional transmission chain (that is to say comprising a heat engine, a drive shaft, a clutch, a box of speeds (here piloted), a drive shaft, and a supervisor
- the vehicle could comprise a hybrid type transmission chain (that is to say comprising at least one heat engine and a motor (or machine) auxiliary (possibly type
- gearbox is a manual gearbox driven. But the invention is not limited to this type of gearbox controlled. It concerns indeed any gearbox whose operation is controlled by a calculator
- the transmission shaft is responsible for driving in rotation at least some wheels of the vehicle, for example those located at the front or rear.
- the engine comprises a crankshaft defining the drive shaft.
- the gearbox comprises (here) at least one primary shaft and at least one secondary shaft.
- the primary shaft is intended to receive, via the clutch, the torque that is produced (here) by the heat engine and delivered to the motor shaft.
- the secondary shaft is coupled to each transmission shaft, generally via a differential.
- the gearbox (controlled) comprises an electro-hydraulic actuator responsible for moving on request its shift forks.
- This electro-hydraulic actuator is powered by a hydraulic accumulator whose pressure is controlled by recharging means comprising a hydraulic pump actuated by an engine
- the object of the invention is notably to propose a method intended to allow the control of the operation of the aforementioned recharging means.
- Such a control method comprises a step that can be implemented
- control device works by a control device.
- the latter may, for example, be part of the supervisor or computer that controls the transmission chain or only the gearbox. But in an alternative embodiment, it could be in the form of equipment possibly coupled to the aforementioned supervisor or computer. Therefore, this control device
- 5 can be realized in the form of software modules (or computer or “software”), or a combination of electronic circuits (or “hardware”) and software modules.
- the step of the method according to the invention is carried out each time that the computer (or supervisor), which controls the gearbox, decides that there is
- the step of the process then consists, when this detection occurs (Pac
- control device which decides to wait for the pressure Pac to become just below the second threshold S2 (ie Pac ⁇ S2), then to trigger the actuation of the recharging means until the pressure Pac becomes just above the third threshold S3 (ie Pac> S3). Once the last condition (Pac> S3) is satisfied, the control device triggers the stopping of the recharging means.
- the first threshold S1 is a minimum pressure that is usually used in a conventional operating mode (of the prior art) for
- the charge is triggered when the vehicle is in its second mode (engine stopped). It is recalled that the recharge depends on the pressure Pac detected in the hydraulic accumulator, and therefore the need to recharge can occur at any time, including during a stop phase of the engine.
- the second threshold S2 (recharge trigger) corresponds to the pressure which is just above the smallest pressure that the hydraulic accumulator can withstand to function properly and
- this second threshold S2 can be determined by means of tests (or tests) carried out in a test laboratory or in the factory for the gearbox considered.
- the third threshold S3 (recharge interruption) corresponds to the pressure which is just below the greatest pressure that can
- this third threshold S3 can also be determined by means of tests (or tests) carried out in a test laboratory or in the factory for the gearbox considered.
- FIG. 1 is a diagrammatic illustration of a nonlimiting example of an algorithm implementing a control method according to the invention.
- the calculator or supervisor determines a need to recharge the hydraulic accumulator because its pressure Pac is lower than the first threshold S1 (ie Pac ⁇ S1).
- the (control device) determines whether the engine is stopped or not (or in other words if the vehicle is in his second mode or his first mode). To do this, the control device can analyze the value of a parameter that defines the operating state of the heat engine.
- control device If the control device detects that the vehicle is in its second
- step 30 it waits for the second threshold S2 to be crossed by a slightly lower value. Then, when the pressure Pac of the hydraulic accumulator becomes lower than S2 (ie Pac ⁇ S2), the control device performs a step 40 in which it triggers the actuation of the recharging means. Once the pressure Pac has become just
- the control device triggers the stopping of the recharging means.
- step 20 the control device detects that the vehicle is in its first mode (heat engine in operation), then it performs a step 50 in which it immediately triggers a
- Steps 20 to 50 are part of the process step of the invention.
- the invention offers several advantages, among which:
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Control Of Fluid Gearings (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1362673A FR3014990B1 (fr) | 2013-12-16 | 2013-12-16 | Procede et dispositif de controle de la recharge d'un accumulateur hydraulique d'une boite de vitesses pilotee, en fonction de la pression |
PCT/FR2014/052861 WO2015092177A1 (fr) | 2013-12-16 | 2014-11-07 | Procédé et dispositif de contrôle de la recharge d'un accumulateur hydraulique d'une boîte de vitesses pilotée, en fonction de la pression |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3084274A1 true EP3084274A1 (fr) | 2016-10-26 |
Family
ID=50102095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14803183.4A Withdrawn EP3084274A1 (fr) | 2013-12-16 | 2014-11-07 | Procédé et dispositif de contrôle de la recharge d'un accumulateur hydraulique d'une boîte de vitesses pilotée, en fonction de la pression |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3084274A1 (fr) |
FR (1) | FR3014990B1 (fr) |
WO (1) | WO2015092177A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017201181A (ja) * | 2016-05-02 | 2017-11-09 | スズキ株式会社 | 車両の変速制御装置 |
US11339808B2 (en) | 2018-08-21 | 2022-05-24 | Volvo Truck Corporation | Method for controlling a hydraulic system of a vehicle driveline |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19935371B4 (de) * | 1999-07-29 | 2015-02-05 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Ansteuerung von Komponenten in einem Fahrzeug |
JP4402456B2 (ja) * | 2001-10-05 | 2010-01-20 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | 車両の電磁油圧式ブレーキ装置におけるアキュムレータチャージポンプの制御方法 |
DE102004019511A1 (de) * | 2004-04-22 | 2005-11-10 | Zf Friedrichshafen Ag | Verfahren zur Steuerung einer Druckmittelpumpe in einem Kraftfahrzeug |
US8915343B2 (en) * | 2010-12-06 | 2014-12-23 | Gm Global Technology Operations, Llc | Method of controlling a dual clutch transmission |
-
2013
- 2013-12-16 FR FR1362673A patent/FR3014990B1/fr active Active
-
2014
- 2014-11-07 WO PCT/FR2014/052861 patent/WO2015092177A1/fr active Application Filing
- 2014-11-07 EP EP14803183.4A patent/EP3084274A1/fr not_active Withdrawn
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2015092177A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR3014990B1 (fr) | 2016-01-01 |
WO2015092177A1 (fr) | 2015-06-25 |
FR3014990A1 (fr) | 2015-06-19 |
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