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
  • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
  • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
  • F16H63/48—Signals to a parking brake or parking lock; Control of parking locks or brakes being part of the transmission
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2200/00—Type of vehicle
  • B60Y2200/90—Vehicles comprising electric prime movers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2300/00—Purposes or special features of road vehicle drive control systems
  • B60Y2300/18—Propelling the vehicle
  • B60Y2300/20—Reducing vibrations in the driveline
  • B60Y2300/207—Reducing vibrations in the driveline related to drive shaft torsion, e.g. driveline oscillations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2300/00—Purposes or special features of road vehicle drive control systems
  • B60Y2300/90—Releasing parking brake at start
• • 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
  • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
  • F16H59/60—Inputs being a function of ambient conditions
  • F16H59/66—Road conditions, e.g. slope, slippery
  • F16H2059/663—Road slope
• • 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
  • F16H2306/00—Shifting
  • F16H2306/32—Preparing the opening or release of the torque transmitting element

Definitions

• TITLE METHOD AND DEVICE FOR MECHANICAL CONTROL OF A
• the present invention relates to the control of vehicle parking brakes.
• It also relates to a mechanical control device of a vehicle in the release phase of a parking brake comprising a parking wheel capable of immobilizing the vehicle by blocking a rotating element of the kinematic chain connecting the gearbox. vehicle wheel speeds, and a vehicle having such a device.
• the parking brake systems have the function of locking the wheels of a vehicle when it is stationary. These systems are activated at the driver's request on the gear selector available in the passenger compartment of the vehicle.
• Park wheel toothed, integral with a part of the gearbox (such as the differential, the secondary shaft ...), a Park finger , secured to the gearbox housing, which pivots in the direction of the parking wheel, to immobilize the latter, and to a system for guiding this finger.
• the Parker's finger is brought, thanks to the guide system, into a position, which allows it to be inserted into a tooth of the Park wheel. Park's wheel is blocked.
• the Park wheel being connected to the vehicle by the transmissions, the vehicle is thus immobilized.
• the forces generated by the weight of the vehicle are transmitted to all of the mechanical elements connecting the vehicle to the Park system, which are then put under stress.
• the elements of the vehicle entering stress when applying the parking brake include tires and suspensions, drive shafts, differential, secondary shaft, park wheel and park finger.
• the use of the Automatic Parking Brake if present on the vehicle, can occasionally provide an answer to this problem, by automatically blocking the brake discs before the Park engages, so as to block the constraints generated by the weight of the vehicle on a slope.
• systematic recourse to the FPA is not possible, first because of the high cost of this function, but also because the FPA cannot be used in certain cold countries, due to the risk of blocking the brake discs.
• the present invention aims to solve this noise problem, by modifying the mechanical system which enters into resonance, in order to cause a vibratory response of the system under more favorable stress, in the sense that it reduces the noise in the passenger compartment.
• the mechanical assembly coupled to the kinematic chain comprises a driving source of the vehicle.
• the proposed mechanical control device comprises a mechanical assembly introducing into the kinematic chain when coupled to these, a mass of inertia making it possible to filter the oscillations of the gearbox which are transmitted to the wheels of the vehicle, during release of the parking brake.
• the mechanical assembly coupled to the kinematic chain includes a driving source of the vehicle
• the power source is an electric machine driving a primary shaft of the gearbox
• the coupling of the electric machine to the kinematic chain is obtained by clutching on a secondary shaft of the gearbox, a pinion driven by the electric machine.
• FIG. 1 is an architectural diagram illustrating a non-limiting application of the invention on a hybrid vehicle architecture.
• FIG. 2 reproduces graphs of calculations in different configurations.
• FIG. 1 there is shown schematically all of the components of the kinematic chain of a hybrid vehicle, put under stress when the parking brake is engaged, and released suddenly when it is released.
• the GMP Powertrain
• the gearbox 1 of the hybrid vehicle composed of the gearbox 1 of the hybrid vehicle and its driving sources (heat engine 2, main electric machine 3, secondary electric machine 4).
• the mass of the vehicle (body and passenger compartment) 4 are connected to the tires 5 of the drive wheels, the first by the transmission shafts 6 connecting the differential 7 of the transmission to the wheels, the second by the wheel suspension arms.
• the body and the passenger compartment are grouped together in the mass 9.
• the parking wheel (not shown) is mounted for example on the secondary shaft 10, or on the differential 7.
• the proposed mechanical control device includes this parking wheel , capable of immobilizing the vehicle by blocking a rotating element of the kinematic chain connecting the gearbox to the wheels.
• the parking wheel is a notched wheel, which cooperates with a parking finger engaged between its notches to immobilize the vehicle.
• the parking brake is released when of the parking pin ejection away from the parking wheel.
• the heat engine 2 and the main electric machine 3 are both located on the primary line of the gearbox.
• the heat engine is connected to a solid primary shaft 11 and the electric machine to a hollow primary shaft 12 concentric therewith.
• the solid primary shaft 11 carries two idler gears 13, 14 which descend the movement of the heat engine on the secondary shaft, to establish one or the other two thermal relationships (the second T2 and the fourth T4).
• the hollow primary shaft carries two fixed teeth or lowering gears 15, 16, descending the movement of the machine
• the proposed solution consists in coupling with the secondary shaft lOde the box, a mechanical system under stress, before
• the control device comprises this mechanical assembly, which introduces into the kinematic chain when it is coupled to them, a mass of inertia making it possible to filter the oscillations of the gearbox transmitted to the wheels when the parking brake is released. .
• Fig. 1 the mechanical assembly which enters into resonance when the parking brake is released, consists of the hollow primary shaft 12, its two down gears 15, 16, and the main electric machine 3. It is different of the initial assembly, because it includes the main electric machine and benefits from its inertia.
• the mechanical assembly coupled to the kinematic chain comprises a driving source of the vehicle
• the power source is an electric machine driving a primary shaft of the gearbox
• FIG. 2 illustrates the behavior of the vehicle through the oscillations of a vehicle wheel. This one was
• the reproduced curves are obtained by simulation. They illustrate the behavior of the front wheel (left) when the parking brake is released. They highlight resonances of the lower resonance amplitudes, and different frequencies if a gear is engaged when the parking brake is released. Their comparison makes it possible to determine the most favorable situation for reducing vibrations.
• the instant t 0 corresponds to the ejection of the parking finger, taking into account the response time of the command.
• the effective release of the parking brake occurs only when the parking finger is ejected away from the parking wheel.
• the front wheel then starts to move, with displacements (of the order of a few millimeters).
• the inertia of the gearbox vibrates on the stiffness of the drive shafts.
• the amplitude of the following is reduced, the train in turn vibrating on the transmissions.
• the first curve reproduced (A) corresponds to the usual configuration of the gearbox, that is to say when no gear is clutched into it when the parking brake is released.
• the second curve (B) corresponds to the preliminary engagement of the second electrical report (EV2). It shows
• the third curve (C) corresponds to the preliminary engagement of the first electric (EV1). It highlights even smaller oscillations. It is therefore the most advantageous situation.
• a fourth curve (D) corresponds to the addition of an inertia of 2500 grams.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Gear-Shifting Mechanisms (AREA)
• Hybrid Electric Vehicles (AREA)
• Control Of Transmission Device (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Regulating Braking Force (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=66286489

Family Applications (1)

Country Status (7)

Family Cites Families (5)

• 2018
  • 2018-12-14 FR FR1872954A patent/FR3090062B1/fr active Active
• 2019
  • 2019-12-02 JP JP2021533485A patent/JP2022512387A/ja active Pending
  • 2019-12-02 BR BR112021011199-9A patent/BR112021011199A2/pt not_active Application Discontinuation
  • 2019-12-02 EP EP19816589.6A patent/EP3894727A1/de not_active Withdrawn
  • 2019-12-02 CN CN201980082458.7A patent/CN113227615A/zh active Pending
  • 2019-12-02 KR KR1020217021876A patent/KR20210094651A/ko not_active Application Discontinuation
  • 2019-12-02 WO PCT/EP2019/083327 patent/WO2020120201A1/fr unknown

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