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
  • F16H63/50—Signals to an engine or motor
  • F16H63/502—Signals to an engine or motor for smoothing gear shifts
• • 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
  • F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
  • F16H59/56—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the main clutch
• • 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
  • F16H61/68—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 specially adapted for stepped gearings
  • F16H61/682—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 specially adapted for stepped gearings with interruption of drive
• • 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
  • F16H59/68—Inputs being a function of gearing status
  • F16H2059/6807—Status of gear-change operation, e.g. clutch fully engaged
• • 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
  • F16H2306/40—Shifting activities
  • F16H2306/54—Synchronizing engine speed to transmission input speed

Definitions

• the technical field of the invention is the control of internal combustion engines, and more particularly their control during a change of manual gearbox ratio.
• Document JP2010121477 describes a strategy for synchronizing engine speed and gearbox when changing gears in a manual gearbox. This strategy applies when shifting upwards (downshift) and downshifts (downshift). It is based on displacement sensors of the gear selector engaged and on a speed sensor of the primary shaft of the gearbox.
• Document US55691 15 describes a strategy allowing the maintenance of the ideal engine speed for synchronization with the higher gear. This strategy is based on a sensor and a strategy allowing to differentiate the changes of ascending and descending ratios.
• the document WO9704980 describes the control of the decrease in engine speed during the gear change and the maintenance of the speed at its synchronization value for the higher gear. This strategy is based on a sensor to identify gear changes to a higher gear.
• the subject of the invention is a method for controlling an internal combustion engine of a motor vehicle provided with a gearbox, a rotation speed sensor of the internal combustion engine, a driving-in sensor.
• the accelerator pedal and a clutch pedal depression sensor comprising the following steps:
• a shift is determined by the driver by determining whether all the conditions of a first set of conditions are satisfied, the first set of conditions comprising the determination that the depressing of the clutch pedal is complete and that there is no depressing of the accelerator pedal,
• the rotational speed of the internal combustion engine is controlled so that it is maintained at the rotational speed setpoint after having allowed it to converge towards the said rotational speed setpoint using the inertia of the engine, and
• the maintenance of the rotation speed of the internal combustion engine is interrupted at the rotation speed setpoint.
• the lowest value can be chosen from a rotation speed setpoint for the higher gear and a predetermined maximum speed limit,
• the speed setpoint for the upper gear being determined by dividing the vehicle speed by a vehicle speed for an engine speed of l OOOtr / min for the upper gear from a speed mapping function of a gearbox report.
• the first set of conditions may include the conditions relating to the determination that the engine speed is greater than a predetermined threshold, that diagnostics are not in progress on the accelerator pedal sensor, on the clutch pedal or on a vehicle communication network.
• the first set of conditions may also include a condition relating to the determination that the speed of the vehicle is greater than a predetermined threshold so as to limit the gearshifts concerned.
• the second set of conditions may include conditions during which it is determined that diagnostics are in progress on the accelerator pedal sensor, on the clutch pedal sensor or on a vehicle communication network.
• the second set of conditions can also include a condition relating to the comparison of the vehicle speed with a predetermined threshold, and / or a condition relating to a comparison of the engine rotation speed with a predetermined threshold.
• An advantage of the invention is that it does not require any additional sensor to detect the change of gear to a higher gear and that it is based only on the clutch pedal sensors, on the request for driver torque, on the rotation speed of the internal combustion engine and on vehicle speed to detect a gear change. These data do not make it possible to detect whether the gear change is made to a higher gear or to a lower gear. The method then systematically considers that the gear change takes place towards the higher gear. This approach makes it possible not to add an additional sensor making it possible to anticipate the direction of the gear change effected by the driver and does not involve any side effect.
• the method of controlling an internal combustion engine for a motor vehicle makes it possible to respond to the problem of poor synchronization of the engine speeds and of the gearbox after a gear change to a higher gear.
• the engine speed is allowed to decrease to the ideal synchronization speed with the higher gear, then this speed is maintained until the engine is re-clutched and of the gearbox.
• the control method makes it possible to maintain the rotational speed of the internal combustion engine at a predetermined ideal value for the purpose of shifting upshift for a predetermined period of time instead of allowing the rotational speed to decrease towards the setpoint. idle speed.
• the method of controlling an internal combustion engine of a motor vehicle provided with a manual gearbox, a rotation speed sensor of the internal combustion engine, a sensor for depressing the accelerator pedal and a clutch pedal depression sensor comprises the following steps illustrated by the single figure.
• the passage of a report by the driver is determined by determining whether all the conditions of a first set of conditions are satisfied.
• the first set of conditions includes the following conditions:
• the first set of conditions includes the conditions relating to the determination that the engine rotation speed is greater than a predetermined threshold that diagnostics are not in progress on the accelerator pedal sensor, on the clutch pedal sensor or on the CAN communication network (English acronym for "Common Area Network").
• the first set of conditions may include a condition relating to the determination that the speed of the vehicle is greater than a predetermined threshold so as to limit the gearshifts concerned.
• a speed setpoint is determined as a function of the ratio immediately above the gear engaged and the speed of the vehicle.
• the lowest value is chosen from a speed setpoint for the upper ratio N + 1 and a predetermined maximum speed speed threshold.
• a predetermined maximum speed speed threshold Such a limitation of the rotation speed makes it possible to discard an outlier of the rotation speed setpoint for the higher ratio N + l.
• a fourth step 4 the speed of rotation of the internal combustion engine is controlled so that it is maintained at the speed speed set point after having allowed it to converge towards said the speed speed set point using the engine inertia.
• a fifth step 5 it is determined whether at least one condition from a second set of conditions is satisfied. If this is the case, the maintenance of the rotation speed of the internal combustion engine is interrupted at the rotation speed setpoint. If a gear is engaged, the speed of rotation of the internal combustion engine is then conventionally controlled as a function of the driver's torque request and on-board strategies.
• the second set of conditions includes the following conditions:
• the second set of conditions also includes conditions during which it is determined that diagnostics are in progress on the accelerator pedal sensor, on the clutch pedal sensor or on the network.
• CAN communication (English acronym for
• the second set of conditions can also include a condition relating to the comparison of the vehicle speed with a predetermined threshold, and / or a condition relating to a comparison of the engine rotation speed with a predetermined threshold.
• control method comprises a step of determining a depression of the clutch pedal coupled to an accelerator foot lift without making a gear change.
• the speed of rotation of the internal combustion engine is controlled so that it is maintained at the speed setpoint after having allowed it to converge towards said the speed setpoint. using the engine inertia.
• step 3 the time elapsed since the speed of rotation is maintained at the speed speed setpoint is then determined.
• the determined duration exceeds a threshold value, it is determined that the driver has not made a gear change.
• the rotation speed of the internal combustion engine is allowed to decrease using the inertia of the latter until the idling rotation speed is reached.
• the speed of rotation of the internal combustion engine is maintained at the speed of rotation of the higher gear instead of the speed of rotation of the lower gear.
• the speed setpoint is determined for the next higher gear and not for a higher two-row gear.
• control method is applied to all or part of the driving modes of the vehicle.
• driving mode we mean modification of different predefined types of powertrain and vehicle according to the customer's choices.
• the parameters impacted are the engine torque curve, the progressiveness of the accelerator pedal, the shaking filter, the steering column filter and the permissiveness of the driving aids.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Control Of Transmission Device (AREA)
• Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=65444139

Family Applications (1)

Country Status (3)

Family Cites Families (6)

• 2018
  • 2018-10-29 FR FR1859986A patent/FR3087864B1/fr active Active
• 2019
  • 2019-10-01 EP EP19774119.2A patent/EP3874183A1/de active Pending
  • 2019-10-01 WO PCT/EP2019/076602 patent/WO2020088871A1/fr unknown

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