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
  • F16H61/26—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
• • 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
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
  • B60K6/48—Parallel type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2306/00—Other features of vehicle sub-units
  • B60Y2306/09—Reducing noise
• • 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
  • F16H2061/2823—Controlling actuator force way characteristic, i.e. controlling force or movement depending on the actuator position, e.g. for adapting force to synchronisation and engagement of gear clutch
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/62—Hybrid vehicles

Definitions

• the invention relates to vehicles with a hybrid powertrain, and more specifically the control of the preselection of a gearbox ratio driven in such vehicles.
• Hybrid powertrain means here an assembly including in particular an electric machine and a heat engine (coupled to a controlled gearbox) intended to provide power to move a vehicle, separately or in combination.
• a hybrid powertrain vehicle (or more simply a hybrid vehicle) can move either by means of its only engine when it is coupled to its gearbox, or by means of its only electric machine when its engine is stopped (this is the so-called “pure electric” mode or ZEV ("Zero Emission Vehicle”)), or still by means of its engine and its electric machine.
• ZEV Zero Emission Vehicle
• the calculator determines in real time the gear ratio that would be best suited if the engine had to be used immediately to move the vehicle, then triggers the preselection of this report so that it can be immediately used if necessary.
• This report preselection relates to several elements of the gearbox, and in particular a player and a synchronizer.
• the player is secured in rotation to a secondary shaft while being able to translate on the latter, and comprises at least one dog, adapted to be translated to be coupled to a idler gear mounted free rotation on the secondary shaft.
• the synchronizer is adapted to be translated to be coupled to the idler gear.
• Each preselection includes a coupling of the synchronizer to the idle gear to preselect, then a coupling of the dog to the same idler.
• the general noise it induces is low or very low, and therefore the noise that is induced by the preselection operations becomes clearly audible in the passenger compartment of the vehicle.
• the driver can then be annoyed by the preselection noise that occurs at times when the gearbox is not supposed to be used since his vehicle operates in the pure electric mode. In the presence of such noises, the driver may be concerned that his vehicle is not functioning properly, and therefore he may be tempted to take it back to his dealer for review, causing him unnecessary time and possibly loss of time. money.
• the invention therefore aims to improve the situation.
• a method for enabling the screening of the preselection in a hybrid powertrain vehicle (that is to say, electric machine and heat engine), a ratio of a gearbox comprising at least one walkman, secured in rotation to a secondary shaft while being able to translate on the latter, and comprising at least one dog, adapted to be translated to be coupled to a idler gear mounted free rotation on the secondary shaft, and at least one synchronizer adapted to be translated to be coupled to the idler gear.
• a hybrid powertrain vehicle that is to say, electric machine and heat engine
• This process comprises:
• the method according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
• the first step may comprise a first substep in which a minimum predefined first effort is exerted on the player to translate the synchronizer at the first minimum speed until it comes into contact with the idle gear, and a second sub-step in which it exerts on the player a second minimum predefined effort to translate the synchronizer and cause a synchronization coupling of the latter to the idler gear;
• the second threshold can be equal to about one second.
• the invention also proposes a device for controlling the preselection, in a hybrid powertrain vehicle, of a ratio of a gearbox comprising at least one player, secured in rotation to a secondary shaft while being able to translate on the latter, and having at least one clutch, adapted to be translated to be coupled to a idler gear mounted free rotation on the secondary shaft, and at least one synchronizer adapted to be translated to be coupled to the idler.
• This device is arranged, when only the electric machine is used to move the vehicle, to trigger the exercise on the player of at least a minimum predefined effort to translate the synchronizer to a first minimum speed to cause a synchronization coupling of the latter to the idle gear, then to trigger the exercise on the player of a force greater than a predefined first threshold and proper to constrain the dog to angularly shift the synchronizer, then to trigger the translation of the clutch to a second minimum speed of to cause a coupling of the latter to the idle gear.
• 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 automotive type, and comprising, on the one hand, an electric machine and a heat engine coupled to a gearbox comprising at least one sliding device, secured in rotation to a secondary shaft while being able to translate on the latter, and comprising at least one dog, adapted to be translated to be coupled to a idler gear mounted free rotation on the secondary shaft, and at least one synchronizer adapted to be translated to be coupled to the idler, and, on the other hand, a calculator of the type of that presented above.
• the object of the invention is notably to propose a method, and an associated device, for controlling the preselection of a ratio of a gearbox driven in a hybrid powertrain vehicle placed in a pure electric mode ( or ZEV).
• the vehicle is of automobile type. This is for example a car. But the invention is not limited to this type of vehicle. It concerns any vehicle comprising a hybrid powertrain and can be driven by a driver. Therefore, the invention relates in particular to land vehicles (cars, motorcycles, commercial vehicles, coaches (or buses), trucks, road vehicles, construction machinery, handling equipment, and trains), and maritime (or river) vehicles. ).
• the hybrid powertrain of the vehicle comprises at least one electric machine and at least one heat engine that can operate separately or in combination under the supervision of a supervisor (or calculator).
• the electric machine (or motor) is coupled to a reduction gear having a single gear reduction in charge of rotating the wheels of the vehicle, for example those which are located at the rear.
• the heat engine is coupled to a controlled gearbox which is itself coupled to at least one transmission shaft responsible for driving in rotation wheels of the vehicle, for example those which are located at the front.
• This engine comprises a crankshaft defining a motor shaft.
• the controlled gearbox is coupled to a single clutch. Therefore, it includes only one primary shaft and at least one secondary shaft. But this geared gearbox could be dual-clutch (or DCT). This transmission is controlled either by the supervisor or computer controlling the hybrid powertrain, or by a supervisor or dedicated computer.
• the primary shaft is designed to receive the engine torque (thermal) via the clutch. It includes driving gears that can be engaged simultaneously with corresponding idler gears of the secondary shaft with which they form pairs.
• the secondary shaft is coupled to the drive shaft, usually via a differential. It comprises at least one player (and usually several) operated by a control fork. Each player is more specifically secured in rotation to a secondary shaft because of the existence of longitudinal grooves on the latter, while being able to translate on the latter in the longitudinal direction. Furthermore, each player comprises at least one synchronizer and at least one clutch coupled to this synchronizer by a mechanism allowing decoupling.
• Each synchronizer is adapted to be translated in the longitudinal direction to be coupled to a idle gear mounted free rotation on its secondary shaft during a so-called synchronization phase.
• Each dog is adapted to be translated in the longitudinal direction, after angularly shifting the associated synchronizer during a phase generally called “Devirage” to be coupled to the idler gear that has been synchronized by the synchronizer associated with it during a phase generally called “interconnection”.
• the coupling of a synchronizer to a idler gear is intended to synchronize the speed of rotation of the latter to that of the secondary shaft which carries it, and that the coupling of a dog to the same idler gear is intended to temporarily temporarily rotate the latter to the secondary shaft which carries it.
• each player can include at least:
• a sleeve mounted in translation on the hub and defining the clutch
• a synchronizing ring (or synchronizer) comprising a female conical part adapted to be coupled to a male conical part of a crazy gear, and
• An arming mechanism installed between an inner face of the sleeve and an outer face of the hub, and for translating the synchronizing ring (or synchronizer) to couple to the idle gear when the sleeve / claw is translated.
• the object of the invention is notably to propose a method for enabling the preselection of a gearbox gear ratio described above to be checked when its vehicle is placed in a pure electric mode (or ZEV).
• Such a control method comprises first and second steps that can be implemented by a control device.
• the latter may, for example, be part of the supervisor or computer that controls the hybrid powertrain 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 can be realized in the form of software modules (or computer or "software”), or a combination of electronic circuits (or “hardware”) and software modules.
• a first step (40) of the method according to the invention consists at least in exercising on the player (concerned by the preselection decided by the supervisor or calculator), when only the electric machine is used. to move the vehicle (and therefore when the latter is in the pure electric mode), at least a predetermined minimum effort to translate the associated synchronizer at a first minimum speed to cause a synchronization coupling of the latter to the idler gear.
• This first minimum speed is chosen so that the shock of the synchronizer on the idler gear induces a noise that is almost inaudible in the passenger compartment of the vehicle when the latter is in the pure electric mode.
• this induced noise corresponds to an acoustic power level of less than about 60 dBA.
• each minimum effort is converted into a speed (minimum) of movement of the synchronizer which is used to define a control set of the range which moves the player comprising this synchronizer.
• first step may be subdivided into two sub-steps.
• a first sub-step (so-called synchronization approach) intended to translate longitudinally the synchronizer at the first minimum speed until it comes into contact with the idle gear, and a second substep (called synchronization) intended for gradually synchronize the rotational speed of the idler gear on the speed of rotation of the synchronizer.
• first and second minimum forces are both intended to cause movements at minimal speeds capable of inducing a noise that is virtually inaudible in the passenger compartment of the vehicle when the latter is in the pure electric mode. Moreover, these first and second minimum forces may be different. For example, the second minimal effort may be slightly greater than the first minimal effort.
• the first minimal effort is intended to translate the sleeve / dog to translate the cocking mechanism so that it translates slightly the synchronizing ring on the idler gear (without coupling) at the first minimum speed
• the second minimal effort is intended to translate the sleeve / clutch to translate the timing ring on the idler gear to couple them closely to synchronize.
• the minimum predefined effort and the first minimum speed can be determined by means of tests (or tests) carried out in a test laboratory or with a car (in the development phase) or in the factory for the gearbox considered.
• the first minimum effort corresponds to a force that is slightly greater than the resistant force that the sleeve must overcome to translate the cocking mechanism so that it slightly translates the synchronizing ring on the idler at the first speed minimal (without causing their coupling).
• the second minimum force corresponds to a force that is slightly greater than the resistant force that the sleeve must overcome to translate the synchronizing ring on the idler gear to cause their coupling for synchronization.
• the synchronization coupling is caused for a duration which is less than a predefined (second) threshold.
• this second threshold may be equal to about one second. But other second threshold values can be used according to the synchronizer technology.
• a second step (50) of the method according to the invention consists at least in exerting on the player a force greater than a first predefined threshold. and capable of constraining the clutch to angularly shift the synchronizer (unwinding phase), then to translate the clutch to a second minimum speed so as to cause a coupling of the latter to the idler gear.
• Exercising a force greater than the first threshold and then translating the clutch to the second minimum speed are triggered by the control device when the synchronization phase is completed.
• the second minimum speed is chosen so that the clutch of the clutch on the idler gear induces a noise that is almost inaudible in the passenger compartment of the vehicle when the latter is in the pure electric mode.
• this induced noise corresponds to an acoustic power level of less than about 60 dBA.
• the second minimum speed can be possibly decreasing to the zero value when the player (and thus the clutch) reaches the bottom of the grid (but this requires a very good knowledge of the position of the bottom of the grid for the gearbox considered, as well as a control dispersions speed of movement and positions of the player (and thus the clutch).
• the effort above the first threshold can be determined by means of tests (or tests) carried out in a test laboratory or in the factory for the gearbox considered.
• the force greater than the first threshold corresponds to a force that is slightly greater than the resistant force that must be overcome to allow the unwinding.
• this effort is converted into a (minimum) speed of movement of the synchronizer which is used to define a control setpoint of the range which moves the player comprising this synchronizer.
• the second predefined minimum speed is preferably slightly greater than a value below which there is a risk of causing desynchronization.
• the second minimum speed and the desynchronization speed can be determined by means of tests (or tests) carried out in a test laboratory or in the factory for the gearbox. considered.
• the force greater than the first threshold is intended to translate the sleeve / clutch to angularly shift (or rotate) the synchronizing ring (or synchronizer) to allow an alignment of the splines of the idler gear in the middle of the splines of the sleeve (unwinding phase), and the translation of the sleeve / clutch to the second minimum speed is intended to mesh the grooves of the sleeve / clutch with corresponding jaw set on the idle gear.
• FIG. 1 is a diagrammatic illustration of a nonlimiting example of an algorithm implementing a control method according to the invention.
• one (the computer or supervisor) performs a test to determine if the vehicle is in pure electric mode (or ZEV).
• the computer or supervisor detects that the vehicle is not in pure electric mode, then it performs a step 20 in which it triggers the achievement of a conventional report selection (or a conventional report pre-selection in the case of a DCT gearbox), if necessary.
• a conventional report selection or a conventional report pre-selection in the case of a DCT gearbox
• (pre) conventional selection a (pre) selection in which the forces exerted on the synchronizer and on the clutch and the movement speeds of the synchronizer and dog are all higher than those used in a mode called “to reduced noise "adapted to the operation in pure electric mode, and therefore are predefined without taking into account the noise they induce.
• the objective is indeed to (pre) select a report as soon as possible.
• the computer or supervisor detects that the vehicle is in the pure electric mode, then it carries out a step 30 in which it determines the ratio, to be preselected in the reduced noise mode, which would be the best adapted if it were necessary. immediately use the heat engine to move the vehicle. Then, it informs the control device that it has just determined a report to preselect.
• the control device performs the first step of the control method described above. Therefore, it triggers the exercise on the player (associated with the report to preselect) of at least a predetermined minimum effort to translate the synchronizer at a first minimum speed to cause a synchronization coupling of the latter to the idle gear corresponding to the report to preselect.
• the control device performs the second step of the control method described above. Consequently, it triggers the exercise on the player (associated with the report to be preselected) of a force greater than a first predetermined threshold and suitable for constraining the dog to angularly shift the synchronizer, then it triggers the translation of this dog to a second minimum speed so as to cause its coupling to the idle gear corresponding to the report to preselect.
• the invention offers several advantages, among which:

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Structure Of Transmissions (AREA)
• Control Of Transmission Device (AREA)
• Mechanical Operated Clutches (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=50473581

Family Applications (1)

Country Status (3)

Family Cites Families (4)

• 2014
  • 2014-01-22 FR FR1450505A patent/FR3016592B1/fr active Active
  • 2014-12-08 EP EP14827802.1A patent/EP3097327A1/de not_active Withdrawn
  • 2014-12-08 WO PCT/FR2014/053211 patent/WO2015110720A1/fr active Application Filing

Non-Patent Citations (2)

Also Published As

Similar Documents

Legal Events