CN110651134B - Method for the corrected determination of the friction energy generated in a clutch during a start of a vehicle having a manual transmission - Google Patents

Method for the corrected determination of the friction energy generated in a clutch during a start of a vehicle having a manual transmission Download PDF

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CN110651134B
CN110651134B CN201880033570.7A CN201880033570A CN110651134B CN 110651134 B CN110651134 B CN 110651134B CN 201880033570 A CN201880033570 A CN 201880033570A CN 110651134 B CN110651134 B CN 110651134B
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energy
clutch
determined
manual transmission
friction
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CN110651134A (en
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迈克尔·海尔曼
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/108—Gear
    • F16D2500/1081—Actuation type
    • F16D2500/1082—Manual transmission
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/30406—Clutch slip
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3041—Signal inputs from the clutch from the input shaft
    • F16D2500/30415—Speed of the input shaft
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3042—Signal inputs from the clutch from the output shaft
    • F16D2500/30421—Torque of the output shaft
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3042—Signal inputs from the clutch from the output shaft
    • F16D2500/30426—Speed of the output shaft
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/306—Signal inputs from the engine
    • F16D2500/3067—Speed of 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/308—Signal inputs from the transmission
    • F16D2500/3081—Signal inputs from the transmission from the input shaft
    • F16D2500/30816—Speed of the input shaft
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/31—Signal inputs from the vehicle
    • F16D2500/3114—Vehicle wheels
    • F16D2500/3115—Vehicle wheel speed
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/508—Relating driving conditions
    • F16D2500/50883—Stop-and-go, i.e. repeated stopping and starting, e.g. in traffic jams
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/51—Relating safety
    • F16D2500/5104—Preventing failures
    • F16D2500/5106—Overheat protection
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/71—Actions
    • F16D2500/7101—Driver alarm

Abstract

The invention relates to a method for determining the friction energy generated in a clutch during a start of a vehicle having a manual transmission, wherein the friction power during a slipping of the clutch (3) is determined. In a method for determining the friction energy without the need for existing sensor means, the friction energy is determined during the start of the vehicle from the friction power applied during the slip, in which friction energy the energy portion of the engine (2) and the energy portion of the manual transmission (4) are calculated separately, which energy portions are calculated in conjunction with each other after the clutch (3) has been synchronized.

Description

Method for the corrected determination of the friction energy generated in a clutch during a start of a vehicle having a manual transmission
Technical Field
The invention relates to a method for the corrected determination of the friction energy generated in a clutch during a start of a vehicle having a manual transmission, wherein the friction power during a clutch slip is determined.
Background
DE 102005061080 a1 discloses a method for detecting damage to a clutch having at least two components which transmit torque by frictional engagement, in which method, depending on the friction power introduced into the friction surfaces of the components by slip between the components which transmit torque, and on the basis of a single damage value calculated on the basis of the friction power and time, a single damage to the clutch is determined if the single damage value exceeds a predetermined value.
In particular in manual transmissions without gear sensors and without transmission speed sensors, determining the frictional energy is very difficult.
Disclosure of Invention
The object of the present invention is to provide a method for the corrected determination of the friction energy generated in a clutch, in which method the friction energy is determined during the start of the vehicle and without information about the engaged gear.
According to the invention, the technical problem is solved by the following ways: during the vehicle start, the friction energy is determined from the friction power applied during the slip, in which the energy portion of the engine and the energy portion of the manual transmission are calculated separately, which are calculated in conjunction with each other after the clutch synchronization. The fact that the frictional power during a coasting operation is derived from the product of the clutch torque during the coasting operation and the difference in rotational speed between the engine shaft and the transmission input shaft is used here. Since wheel speed sensors and engine speed sensors are present in the vehicle, the friction energy can be reliably determined from these variables without additional transmission speed sensors and/or gear sensors.
Advantageously, after the clutch synchronization, a transmission ratio of the manual transmission is determined, the energy fraction of the manual transmission is corrected by means of the transmission ratio, and the corrected energy fraction of the manual transmission is then subtracted from the energy fraction of the engine to derive the friction energy. The corrected friction energy during the start of the vehicle can be determined simply by correction.
In one embodiment, the gear ratio is determined from a constant ratio of the engine speed and the wheel speed of the vehicle.
In one variant, the clutch torque and the engine speed are integrated over the entire starting period to determine the energy fraction of the engine. This results in a total energy introduced into the clutch during the start-up period.
In one refinement, the clutch torque and the wheel speed are integrated over the entire start-up period to determine the energy portion of the manual transmission. The energy introduced into the clutch by the manual transmission is also reliably determined here.
In one embodiment, the overall transmission ratio of the vehicle drive train, which is determined by the gear transmission ratio and the axle transmission ratio, is used as the transmission ratio of the manual transmission. The use of the overall transmission ratio ensures a particularly reliable determination of the starting friction energy of the vehicle.
In one embodiment, a warning signal is output when the determined friction energy exceeds a threshold value. Since exceeding the threshold value indicates clutch wear, measures for changing the friction linings can be implemented.
In a further variant, the fault information is stored when a threshold value is exceeded, and an alarm signal is output after a predetermined number of fault information has occurred. This ensures that there is indeed wear at the clutch and that an accidentally caused fault signal does not cause a faulty indication of wear of the clutch.
Drawings
The invention has a variety of embodiments. One of which is explained in detail in accordance with the illustration shown in the drawing.
Wherein:
fig. 1 shows a schematic representation of a drive train of a vehicle.
Detailed Description
Fig. 1 shows a schematic representation of a drive train 1 of a vehicle. The drive train 1 comprises an internal combustion engine 2 and a clutch 3 for transmitting the torque provided by the internal combustion engine 2. Here, the clutch 3 is connected to a transmission 4, and torque generated by the internal combustion engine 2 is transmitted to a driven shaft 5 via the transmission and further transmitted to a drive wheel 6 of the vehicle. The clutch 3 can be controlled by means of a clutch controller 7. The engine speed of the internal combustion engine 2 is measured by means of a speed sensor 8, which is situated opposite a crankshaft 9, which connects the internal combustion engine 2 to the clutch 3. The wheel speed sensor 10 determines the wheel speed implemented by the transmitted drive torque. The two rotational speed sensors 8, 10 are connected to a clutch controller 9.
Since there are no gear and transmission speed sensors in the drive train 1, the frictional energy E introduced into the clutch 3 during the vehicle starting process is to be calculatedReib. The friction energy E generated during the slipping of the clutch 3 during the start of the vehicle is used hereReibCalculated from the clutch torque and the generated slip friction:
PReib＝MKupp*ΔωSchlupf (1)
in this case, the rotational speed difference Δ ωSchlupfIs the engine speed measured by the speed sensor 8 and the transmission input shaft is not measurableA rotational speed difference of the rotational speeds of the quantities.
PReib＝MKupp*(ωMotor-ωGetriebe) (2)
Friction power is at t during the whole vehicle starting process1To tEndIs exhausted in time period. The following frictional energies were thus obtained:
Figure BDA0002282309620000031
thus, the two terms, i.e. the energy portion E of the engineMotAnd the energy part E of the manual transmissionGetCalculating:
Figure BDA0002282309620000032
Figure BDA0002282309620000033
however, since there is no transmission speed sensor, the energy of the manual transmission is partially determined by the wheel speed ωRadInstead. The total transmission ratio i of the drive train 1 with gear ratios and axle ratios must be used hereGang。
Figure BDA0002282309620000041
During the start of the vehicle, according to the wheel speed ω determined by the wheel speed sensor 10RadDeriving frictional energy E of manual transmissionGet(Antahrt). Irrespective of this, the friction energy E of the engineMotCalculated as shown in equation (4).
Figure BDA0002282309620000042
At the input of the transmissionConstant overall transmission ratio i of drive train 1 after synchronization of the rotational speed of the shaft and the rotational speed of the engine shaftGangAs at engine speed ωMotorAnd wheel speed omegaRadA fixed ratio therebetween. This ratio is calculated by equation (6).
From the energy part E of the engineMotCalculated after subtracting the synchronizationGetThereby obtaining corrected starting energy E of the vehicleReibStarting energy is introduced into the clutch 3 during the starting process.
Figure BDA0002282309620000043
The frictional energy E thus calculatedReibMay be used as an input for various other vehicle designs. This friction energy can therefore be taken into account in the thermal calculation for determining the clutch wear. When the wear is determined, a warning signal is output to the vehicle and/or the driver. In this case, the fault information can be stored, in particular, in a fault memory of the vehicle. If such fault information occurs several times, it is possible to draw conclusions after reading in the factory that the clutch has become worn and must be repaired or replaced.
Furthermore, in addition to clutch wear, a clutch overload can also be determined, which is taken into account during the next start, for example by switching off the engine torque to a predetermined extent.
List of reference numerals
1 drive train
2 internal combustion engine
3 Clutch
4 Manual transmission
5 driven shaft
6 driving wheel
7 Clutch controller
8 engine speed sensor
9 crankshaft
10 wheel speed sensor

Claims (8)

1. Method for determining the friction energy generated in a clutch during a vehicle start with a manual transmission, wherein the friction power during a clutch (3) slip is determined, characterized in that during the vehicle start the friction energy is determined from the friction power applied during the slip, in which friction energy an energy fraction of the engine (2) and an energy fraction of the manual transmission (4) are calculated separately, which energy fractions are calculated in conjunction with each other after synchronization of the clutch (3);
the fault information is stored when the determined friction energy exceeds a threshold value, and an alarm signal is output after a predetermined number of fault information have occurred.
2. Method according to claim 1, characterized in that after the synchronization a transmission ratio of the manual transmission (4) is determined, the energy fraction of the manual transmission (4) is corrected by means of the transmission ratio, and then the corrected energy fraction of the manual transmission (4) is subtracted from the energy fraction of the engine (2) to derive friction energy.
3. The method of claim 2, wherein the gear ratio is determined by a constant ratio of engine speed and wheel speed of the vehicle.
4. A method according to claim 3, characterized by integrating the clutch torque and the engine speed over the whole starting period to determine the energy fraction of the engine (2).
5. A method according to claim 3, characterized in that clutch torque and the wheel speed are integrated over the whole starting period to determine the energy portion of the manual transmission (4).
6. A method according to any one of claims 1-5, characterised in that the total gear ratio of the vehicle drive train (1), determined by the gear ratio and the axle ratio, is used as the gear ratio of the manual transmission (4).
7. A method according to any one of claims 1 to 5, characterised by outputting an alarm signal when the determined friction energy exceeds a threshold value.
8. Method according to claim 6, characterized in that an alarm signal is output when the determined friction energy exceeds a threshold value.
CN201880033570.7A 2017-06-21 2018-05-22 Method for the corrected determination of the friction energy generated in a clutch during a start of a vehicle having a manual transmission Active CN110651134B (en)

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DE102017113626 2017-06-21
DE102017113626.6 2017-06-21
PCT/DE2018/100488 WO2018233757A1 (en) 2017-06-21 2018-05-22 Method for the correct determination of friction energy arising in a clutch as a vehicle fitted with a manual gearbox pulls away

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CN110651134B true CN110651134B (en) 2021-04-02

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CN114321216B (en) * 2021-12-31 2023-12-29 浙江吉利控股集团有限公司 Clutch control method, control device, storage medium, and program product

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4651142A (en) * 1983-09-26 1987-03-17 Wabco Westinghouse Fahrzeugbremsen Gmbh Apparatus to protect a clutch from overheating
CN1394260A (en) * 2000-09-19 2003-01-29 日产自动车株式会社 Apparatus for estimating clutch temp.
CN1695013A (en) * 2002-10-01 2005-11-09 伊顿公司 Clutch protection system
DE102005061080A1 (en) * 2005-01-20 2006-07-27 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Damage detection method of clutch, involves determining friction power introduced into friction surfaces of components, by slippage between torque-transferring components
DE102006037389A1 (en) * 2006-08-10 2008-02-14 Daimler Ag Assessment of clutch energy dissipation on starting off, using a manual gearbox, takes the selected gear reduction for an assessment correction to prevent overheating
EP2461064A2 (en) * 2010-12-02 2012-06-06 Scania CV AB Method and system for assessment of clutch wear
DE102013210357A1 (en) * 2013-06-04 2014-12-04 Robert Bosch Gmbh Method for determining a wear of a clutch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4651142A (en) * 1983-09-26 1987-03-17 Wabco Westinghouse Fahrzeugbremsen Gmbh Apparatus to protect a clutch from overheating
CN1394260A (en) * 2000-09-19 2003-01-29 日产自动车株式会社 Apparatus for estimating clutch temp.
CN1695013A (en) * 2002-10-01 2005-11-09 伊顿公司 Clutch protection system
DE102005061080A1 (en) * 2005-01-20 2006-07-27 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Damage detection method of clutch, involves determining friction power introduced into friction surfaces of components, by slippage between torque-transferring components
DE102006037389A1 (en) * 2006-08-10 2008-02-14 Daimler Ag Assessment of clutch energy dissipation on starting off, using a manual gearbox, takes the selected gear reduction for an assessment correction to prevent overheating
EP2461064A2 (en) * 2010-12-02 2012-06-06 Scania CV AB Method and system for assessment of clutch wear
DE102013210357A1 (en) * 2013-06-04 2014-12-04 Robert Bosch Gmbh Method for determining a wear of a clutch

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CN110651134A (en) 2020-01-03
WO2018233757A1 (en) 2018-12-27
DE112018003185A5 (en) 2020-03-05
DE102018112167A1 (en) 2018-12-27

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