DE102008001803A1 - Method for detecting an operating age of a component of a hybrid vehicle - Google Patents

Abstract

The invention relates to a method for detecting an operating age of a component of a hybrid vehicle with detecting (101) a change in state of the component and changing (103) a state count in the presence of the state change, wherein the state counter value indicates the operating age of the component.

Description

Technical area

The The present invention relates to a method for detecting a Operating age of a component of a hybrid vehicle.

State of the art

to Reduction of fuel consumption and exhaust emissions is in hybrid vehicles used in addition to an internal combustion engine, an electric motor. there the internal combustion engine is in predetermined operating modes by means of disconnected from a drive train and automatically stopped and the vehicle is operated by electric motor, the energy provided by a high-voltage battery. This condition is called eDrive, whose duration is primarily determined by a desired state of motion of the vehicle, but above all depends on the capacity of the energy store. Discharges the high-voltage battery such that a predetermined Energy threshold is exceeded, then the internal combustion engine automatically to the drive train by closing the clutch hitched and started. By switching the electric motor in a regenerative operation can again performance in the so mentioned recuperation in the high-voltage battery fed back which will load them. The starting energy during execution the automatic loading and unloading processes however, from the respective and for example in the control unit deposited operating strategy. This is fundamentally directed according to the nature of the high-voltage battery, since this systemic can not be discharged deeply.

6 shows a basic structure of a hybrid vehicle comprising an internal combustion engine 601 , a separating clutch 603 , an electric motor 605 , a transmission converter 607 and for example an automatic clutch 609 , which is the transmission converter 607 assigned. The separating clutch 603 is controlled by means of a clutch actuator, not shown, in particular a hydraulic Spindelaktuator. In addition, the hybrid vehicle includes a high-voltage system for operating the electric motor 605 with a high-voltage battery, power electronics and a voltage converter.

5 illustrates the essential components of a parallel hybrid, the internal combustion engine 501 , a fuel tank 503 , an electric motor 505 and a clutch, for example, as a disconnect clutch 507 or as a starting clutch 509 may be formed. Furthermore, a high-voltage battery 511 and an inverter 513 intended.

To achieve the above-mentioned properties of the hybrid concept, it is of crucial importance that, in particular, in the 5 and 6 shown components without errors over a certain operating time, in terms of operating time or over a mileage work. It is therefore important to record the operating age of the component or its operating-condition-related operating condition. The DE 10 2005 042 062 A1 describes in this regard a prediction method for components of hybrid and electric vehicles, in which an operating state of a component is determined on the basis of a reaction of the component to a test signal. However, this method is complicated and requires a targeted driving of each component.

Disclosure of the invention

The The invention has the advantage that a simple Method which does not require any additional sensors, can be performed, the reliable conclusions about the actual mileage or operating time allows. The invention is based on the recognition that the operating age a component of a hybrid vehicle by detecting state changes the component can be done. A change of state becomes According to the invention then detected when a state transition between a first predetermined state of the component and a second predetermined state of the component is detectable. For example can open or as a state change closing or operating a separating clutch be recorded. By a continuous accumulation of the recorded State changes can thus be reliable for example in a number of state changes counted operating ages of the component are closed.

The The invention further relates to an advantageous method for detecting an operating age of a component of a hybrid vehicle, with Detecting a change of state of the component and changing a state count in the presence of the state change, wherein the state count value is the operating age of the component points.

According to one Embodiment, the component is a clutch or a transmission or an inverter or a fuel pump or a Internal combustion engine or an electric motor.

According to an embodiment, as the state change, a state transition between a first predetermined state of the component and a second predetermined state is made component, in particular opening or closing a clutch or a torque change or a gear change or a change in electrical power or opening a brake or closing a brake or ignition of an internal combustion engine or starting an electric motor or stopping the component or a commissioning of the component or a direct start of a drive of the hybrid vehicle, in particular a combustion drive or an electric drive, or a pulse start of a drive, in particular a combustion drive or an electric drive, or a torn start a drive, in particular a combustion drive or an electric drive, or a clutch adaptation.

According to one Embodiment is the state count on State counter reading, by a predetermined or by a state-specific increment or decrement increased or is reduced.

According to one Embodiment is in the step of detecting the Change of state a change of a predetermined State is detected from a plurality of states.

According to one Embodiment will be another change of state the component that differs from the state change, detected, wherein in the presence of further change in state of the State value or another state value is detected.

In a particularly advantageous embodiment can for the clutch actuator, which is the central component of a parallel hybrid for controlling the separating clutch between the internal combustion engine and the electric machine represents, conclusions on the actuation cycles or the total mileage the component separating clutch are made, in particular without that a sensor within the separating clutch must be present.

The The invention further relates to an advantageous device for detecting an operating age of a component of a hybrid vehicle, with a detection device for detecting a change of state the component and a state counter that is formed is a state count in the presence of the state change to change, with the state count on the Operating age of the component indicates.

According to one Embodiment, the detection device is formed, detect a further state change of the component, which differs from the state change, and where the state counter is formed, in the presence of the other State change the state value or another state value to change, in particular to increase or decrease.

According to one Embodiment, the detection device is formed, a state transition between a first predetermined State of the component and a second predetermined state of the Component to capture, in particular an open or a Close a clutch or a torque change or a transmission gear change or a change of a electric power or opening a brake or a Closing a brake or igniting a Verbrennungsmo sector or starting an electric motor or stopping the component or a commissioning of the component or a direct start of a Drive of the hybrid vehicle, in particular a combustion drive or an electric drive, or a pulse start of a drive, in particular a combustion drive or an electric Drive, or a cracked start of a drive, in particular a combustion drive or an electric drive, or a clutch adaptation.

The The invention further relates to a program-equipped device, which is adapted to run a computer program to carry out the method according to the invention.

drawings

Further Embodiments of the invention will be referred to explained in more detail in the accompanying drawings. Show it:

1 Method steps of a method for detecting an operating age of a component;

2 a block diagram of an apparatus for detecting an operating age of a component of a hybrid vehicle;

3 a block diagram of an apparatus for detecting an operating age of a component;

4 an apparatus for determining an operating age of a component;

5 a parallel hybrid system; and

6 a parallel hybrid system.

Description of the embodiments

1 shows the steps of a method for detecting an operating age of a component of a hybrid vehicle, in which in 101 a change of state is detected and at the step 103 if the state change is present, a state count is changed, for example increased or decreased.

2 shows a block diagram of one of the method 1 corresponding device for detecting an operating age of a component with a detection device 201 for detecting a state change of the component and a state counter 203 which changes a state count in the presence of the state change, in particular increases or decreases. The resulting state count indicates the age of the component of the hybrid vehicle and may be read by, for example, a tester. Further functionality of the device 2 results directly from the functional steps of the method for detecting the operating age of the component.

3 shows a block diagram of an apparatus for detecting an operating age of a component of a hybrid vehicle, in particular for detecting an operating time of an actuator for driving a separating clutch. The device comprises a first comparison element 301 , a second predicate 303 and a logic element 305 , For example, an OR gate, the output of the first Vergleichselements 301 and an output of the second predicate 303 is downstream. An output of the logic element 305 is with a bit network element 307 connected, whose output with a detection element 309 connected is. An output of the detection element 309 is via an optional control element 311 connected to a counter, which is an addition element 313 , a store 315 and another bit network element 317 having. The memory 315 is intended to store and provide a current count. The bit network elements 307 and 317 For example, it is intended to permanently output a logical "1", for example in the form of a suitable voltage value.

At a first entrance 319 of the first predicate 301 For example, a signal is applied, which corresponds for example to a Kupplungsverfahrweg, ie a Ausrückweg, a clutch plate travels until a clutch closes. To a second entrance 321 of the first predicate 301 For example, a first threshold is applied, which corresponds to a Kupplungsverfahrweg in an open clutch, for example, 5 mm or 10 mm. The first predicate 301 checks if both signals are the same or if that is the first input 319 applied signal is greater than the first threshold.

At an entrance 323 of the second comparison element 303 a signal is applied which corresponds to a second threshold, which corresponds, for example, to a clutch travel in a closed clutch, for example 15 mm or 18 mm. The second predicate 303 also receives that at the first input 319 of the first comparison element signal and outputs a comparison result to the logic element 305 out. The linking element 305 compares the comparison result with an output of the first predicate 301 wherein the bit network element 307 For example, if one state change occurs, set one bit. The detector 301 is designed to detect the bit, for example, with the rising edge and the detection result of the optional element 311 supplying, for example, a one if the rising edge has detected a state change. Thus, the counts in 3 illustrated device, for example, the number of actuations of an actuator of the clutch, which can be read, for example, a workshop tester. This makes it possible to draw a conclusion about the operating time of the actuator, which can be done, for example, using a logic circuit implemented in a control unit of the actuator or of the motor.

According to one Aspect can be used to count the state changes a counter can be used, for example, in a clutch drive module for counting the number The clutch actuation is used to make a decision about to introduce a necessary coupling adaption. A count of this counter can be in logic as an input signal can be used for example. It will be the clutch actuations or the Aktuatorensteuerungen during a drive cycle in, for example, NV-RAM (non-volatile RAM) saved. By ending the current driving cycle, for example when the ignition is off, the counted Cruise events, for example in an EEPROM (Electrically Erasable Programmable Read Only Memory). The counter the function in the NV-RAM can, for example, when ignition be initialized with the value 0, so that the clutch actuations or Actuator controls counted in the current drive cycle can be.

The counter values stored in the EEPROM can then be transferred to a control unit of the actuator in the motor overrun. Thus, you can the clutch actuations or the Aktuatoransteuerungen are stored on an actuator, so that is not lost in an expansion or conversion of the actuator, the runtime information. Furthermore, with the storage of the counter, it is also possible to record the entire mileage traveled with the respective component. For this purpose, for example, the relatively traveled distance can be detected and transmitted to the counting function. If the storage of the counter data for the caster is detected, then the distance traveled relatively per drive cycle can be summed up in a counter. This counter can be transmitted to the control unit of the respective component, with which the actual mileage can be detected. For a vehicle endurance, it may also be useful that the counters can be reset at the level of the engine control and, for example, not at the level of the actuator, for example, at a program level change. As a result, it is also possible to extract and evaluate program-level-specific differences in vehicle endurance.

For example can be used to record the status change start or stop cycles of a hybrid system are counted to of actuator components and actuators that play a key role in and stop behavior of the hybrid vehicle are involved. For example, this information can be in a field database created and used for the analysis of start or stop cycles. By feeding back the information thus obtained it is also possible to do so during the Construction, for example, in a design or compliance of the specifications, during the functional development of the Software that, for example, determines field results or functional requirements or in the applications, for example in a design the importance of the respective application for the hybrid system, be taken into account.

According to one embodiment, the in the 2 and 3 shown devices are connected, for example, with a workshop tester, with an interface can be provided for the evaluation of each error. For example, a platform tester interface can be reconfigured to take over and forward the state counts.

As mentioned above, the inventive Concept for detecting an age of any components a hybrid vehicle can be used. So, for example a total vehicle cycle counter, for the total number of vehicle starts and / or for the total number the vehicle stops, for example, over the entire vehicle mileage be used. In addition, it is possible to record the operating age component-specific, for example one counter for the total number of starts component, for the total number of stops of the component as well as for the total number of starts and stops of the Component can be used. It can in particular the state changes of a clutch actuator efficient be recorded. The inventive concept allows it further, a total number of direct starts, a total number the impulse starts, a total number of touched starts or to detect a total number of clutch adaptations, the Counter readings, for example, depending on can be selected from a startup type. Consequently Hybrid vehicle specific modes of operation can be detected the age of operation of the vehicle or the respective vehicle component, For example, the clutch actuator, be considered.

4 shows an example of a device 401 for detecting an operating age of a component based on a model of the component as well as a plurality of system parameters, that of the device 401 is supplied via a plurality of inputs. This device for detecting an operating age or state of aging is suitable for making a qualitative and quantitative statement regarding the operating cycles or the total mileage of the components of the separating clutch, even if no sensors are specially installed inside the units. In particular, an energy input can be derived. This can be calculated from the intensity and duration of the effect of the observed system parameters and can be taken into account when determining the age of operation. If the component is, for example, a coupling system, then at a first input 403 a temperature of the clutch lining, which may be measured or estimated, are provided. Furthermore, via an entrance 405 a differential speed between a speed of an electric motor and an internal combustion engine, via an input 407 a moment difference between a moment of the internal combustion engine and a moment of the electric motor, via an input 409 an input about how long the clutch is in the slip state or the slip time, as well as an input 411 an input about what kind of startup is provided. Depending on the start, for example, the Zusteuerkennlinie the coupling may be shaped differently, which leads to different load, in particular with respect to the forces acting on the individual components of the clutch and / or the duration of the forces acting and thus to change the operating age. In addition, optional via an input 413 the information regarding the heating and / or cooling time of the friction lining can be provided. Optionally, the device 401 the count is reported, indicating the number of state changes of the clutch system and / or the clutch actuator. The component 401 for example, associates the parameters applied to their inputs with a characteristic curve that can be determined empirically or by means of simulations in order to determine the operational aging of the coupling system. Alternatively, the operation aging can be done, for example, by adding the detected input variables. Advantageously, the detected input quantities are multiplied by a corresponding weighting factor according to their influence on the aging of the component before the addition. This operational aging may vary depending on the start, so that, for example, at a comfort start, the aging of the engine is less pronounced than at a power start or at a torque start. This operational aging value can be read out with a suitable test device. Thus it is possible, for example, to prevent an imminent failure of the hybrid system due to a worn disconnect clutch, even if no visual inspection by the workshop is possible.

The device 401 also has an output 415 over which the determined operational aging value is output. In addition, for example via a tester, both the counter indicating the number of state changes such as the actuations and the model age value resulting from the model may be output.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102005042062 A1 [0005]

Claims (10)

Method for detecting an operating age of a component of a hybrid vehicle, comprising: detecting ( 101 ) a change of state of the component; and change ( 103 ) of a state count in the presence of the state change, the state count indicative of the operating age of the component. The method of claim 1, wherein the component is a clutch and / or a transmission or an inverter and / or a fuel pump and / or internal combustion engine and / or an electric motor and / or a clutch actuator for driving a separating clutch and / or a separating clutch. Method according to one of the preceding claims, where as state change a state transition between a first predetermined state of the component and a second predetermined state of the component is detected, in particular opening or closing a clutch or a torque change or a gear change or a change in electrical power or opening a brake or a brake closing or ignition an internal combustion engine or a startup of an electric motor or stopping the component or putting the component into operation or a direct start of a drive of the hybrid vehicle, in particular a combustion drive or an electric drive, or a pulse start of a drive, in particular a combustion drive or an electric drive, or a torn start of a drive, in particular a combustion drive or an electric Drive, or a clutch adaptation. Method according to one of the preceding claims, wherein the state number value is a state counter reading, which is a predetermined or a state-specific increment or decrement is increased or decreased. Method according to one of the preceding claims, wherein in the step of detecting the state change a change of a predetermined state of a plurality is detected by states. Method according to one of the preceding claims, wherein a further change of state of the component, the is different from the state change, is detected, and wherein in the presence of the further state change of State value or another state value is detected. Device for detecting an operating age of a component of a hybrid vehicle, comprising: a detection device ( 201 ) for detecting a change of state of the component; and a state counter ( 203 ) configured to change a state count in the presence of the state change, the state count indicative of the operating age of the component. Apparatus according to claim 7, wherein the detection means ( 201 ) is adapted to detect a further state change of the component, which differs from the state change, and wherein the state counter ( 203 ) is formed, in the presence of the further state change to change the state value or another state value, in particular to increase or decrease. Apparatus according to claim 7 or 8, wherein the detection means is formed, a state transition between a first predetermined state of the component and a to detect the second predetermined state of the component, in particular an opening or closing a clutch or a torque change or a gear change or a change in electrical power or opening a brake or a brake closing or ignition an internal combustion engine or a startup of an electric motor or stopping the component or putting the component into operation or a direct start of a drive of the hybrid vehicle, in particular a combustion drive or an electric drive, or a pulse start of a drive, in particular a combustion drive or an electric drive, or a cracked start a drive, in particular a combustion drive or a electric drive, or a clutch adaptation. Programmed device, the is formed, a computer program for executing the Method according to one of the claims 1 to 6.