EP3172421A1

EP3172421A1 - Method for controlling and/or regulating the power of an engine

Info

Publication number: EP3172421A1
Application number: EP15729386.1A
Authority: EP
Inventors: Udo Sieber; Markus Deissler; Ulrich Bauer
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2014-07-23
Filing date: 2015-06-08
Publication date: 2017-05-31
Also published as: WO2016012148A1; KR20170036684A; JP6403868B2; DE102014214380B3; JP2017522493A

Abstract

The invention relates to a method for controlling and/or regulating the power of an engine (910), in particular an engine (910) of a motor vehicle (900). The method therefor comprises the following steps: detection of an operating position (S) of an accelerator pedal (100) that can be moved between an initial position (A) and an end position (E), as well as the determination of a power requirement (PS) of the engine (910) by applying a first functional relation (510) between the operating position (S) and the power requirement (PS). In order to be able to set a sufficiently high power requirement of the engine (910) also in situations in which an accelerator pedal (100) can no longer be fully deflected, it is provided that after the occurrence of a defined event, the power requirement (PS) of the engine (910) is determined by applying a further functional relation (550) between the operating position (S) and the power requirement (PS). In this case, the defined event is a situation in which the accelerator pedal (110) can only be moved to a first position (B) with normal force, wherein the first position (B) is situated between the initial position (A) and the end position (E). The invention further relates to a power control arrangement (950) for an engine (910), in particular for an engine (910) of a motor vehicle (900), on which the method according to the present invention is carried out. The invention also relates to a computer program product.

Description

Description title

Method for controlling and / or regulating the power of an engine

Field of the invention

The invention relates to a method for controlling and / or regulating the power of an engine having the features of the preamble of the independent method claim. The invention further relates to a power control arrangement for a motor on which such a method is performed and a computer program product containing a program code which, when executed on a data processing unit, performs such a method. State of the art

In a conventional passive accelerator pedal for controlling the power of a motor, e.g. a motor vehicle, the driver works against a spring, which is integrated in the pedal mechanism. The spring force is approximately proportional to the pedal travel. By this proportional force, the driver can

Accurately adjust the accelerator pedal position and thus precisely dose the power requirement, for example a torque request, to the engine.

Electronic accelerator pedals are no longer directly mechanically connected to a component on the engine, which converts the power requirement of the engine in the required power, such as a throttle valve. Rather, the accelerator pedal is provided with at least one sensor and only electronically connected to an element which converts the power requirement to the motor in the required power. In order to determine the power demand on the motor from a pedal position and to transmit this to the motor, a method is usually carried out in a control unit.

In such methods, a sensor detects a pedal position or working position of the pedal between a starting position and an end position. In a further step, a power demand is determined on the engine using a dependency relationship between the work position and the power demand on the engine. The dependency relationship is usually designed such that the Power requirement to the engine is then maximum when the accelerator pedal in the

End position is moved. From the determined performance requirement can then

Control parameters for a control, such as a throttle, are determined and transmitted to the control. For the final position of the

Accelerator pedal, the full load point of the engine can be adjusted.

A power control arrangement on which such a method is carried out is described in DE 10 2010 062 363 A1. Disclosure of the invention

The invention is based on the recognition that in electronic accelerator pedals, the operation of the engine in a mechanical fault on the accelerator pedal can be severely limited or even impossible. For example, in a limited accelerator pedal travel or at a limited accelerator pedal angle at which the accelerator pedal can not be deflected to the final position, can with the conventional

Dependency relationship of the full load point of the engine can no longer be achieved. The more the accelerator pedal angle or the accelerator pedal angle is restricted, the lower the attainable range of the power requirement in the dependency relationship. In the worst case, it may happen that not enough power can be requested from the engine, for example, to move the vehicle to a workshop.

With the help of active accelerator pedals, the application possibilities of electronic accelerator pedals are additionally extended. Thus, for example, the possibility can be created, the driver depending on the driving situation, a haptic feedback on the

To transmit accelerator pedal, for example, by applying the accelerator pedal or a footboard of the accelerator pedal with a vibration or by applying a defined force to the accelerator pedal, which requires the driver a defined increased effort to the accelerator pedal over a dependent example of the driving situation position continue to move towards the end position.

Such active accelerator pedals, for example, use actuator elements such as a motor to exert the necessary forces on the accelerator pedal. The blocking of such a motor or actuator element can cause the accelerator pedal by the driver with normal or reasonable force can not be moved to the final position. Thus, the achievement of the full load point in a normal dependency relationship is no longer possible and depending on the restriction of the Accelerator pedal path as a result of blocking the actuator element, there may be a situation in which not enough power is available to move the vehicle, for example, in the workshop. There may therefore be a need to provide a method for controlling the power of an engine with which upon occurrence of a defined event,

For example, a limitation of the maximum achievable accelerator pedal travel of an electronic accelerator pedal, yet the full load point of the engine can be achieved or at least a power can be retrieved from the engine sufficient to a motor, for example. moving a powered vehicle to a workshop.

Advantages of the invention

This need can be met by the subject matter of the present invention according to the independent claims.

Advantageous embodiments of the present invention are described in the dependent claims. The following are features, details and possible advantages of a method for controlling and / or regulating the power of a motor, a

Power control arrangement for a motor and a computer program product according to embodiments of the invention discussed in detail. According to a first aspect of the invention, a method for controlling and / or regulating the power of an engine, in particular an engine of a motor vehicle, is proposed. This method makes it possible to control the full-load point of the engine or at least one load point of the engine, with which an emergency operation is possible, even in a situation in which the pedal travel of an accelerator pedal for specifying a desired power requirement on the engine is limited such that a

End position of the accelerator pedal is no longer available.

As a pedal travel, for example, a path along a route can be understood, in which the path length can be determined, for example, in mm or cm. However, it may also be a path in the sense of a rotation angle about a pedal axis, in which the position can be determined in degrees. This is achieved in that the method comprises the steps of: detecting a working position of an accelerator pedal movable between a home position and an end position, determining a power demand on the engine using a first dependency relationship between the work position and the power demand. It is provided according to the invention that after the occurrence of a defined event, the power demand on the engine using a further dependency relationship between the working position and the

Achievement requirement is determined, wherein the defined event is a situation in which the accelerator pedal can be moved with normal force only to a first position, the first position between the starting position and the

End position is.

Thus, for example, in such a situation, the first position, starting from the starting position, can be at most 40% of the positional difference between the end position and the starting position of the accelerator pedal. Thus, at least 60% of the commonly available pedal travel would no longer be available.

Under normal force can be understood a force that does not differ significantly from the force required to adjust the accelerator pedal from the working position in the direction of the end position and the starting position

Usually necessary, for example, to overcome the force of a connected to the accelerator pedal spring or in the case of an active accelerator pedal to overcome this spring force and acted upon by an actuator element on the accelerator pedal additional force. Such acted upon by an actuator element additional force can be applied for example at a "kick-down" point.

For example, a "normal force effort" may still exist (even) if the force required to adjust the accelerator pedal deviates by more than 5% or at most 10% from a desired value Do not allow the accelerator pedal to be moved out of reach with "normal force". A situation in which the accelerator pedal can not be moved beyond the first position with normal expenditure of force can be determined, for example, without the use of a force sensor, for example if it is detected by a control unit that an actuator element connected to the accelerator pedal is blocked and accessible Limits the area of the accelerator pedal travel. A controller can recognize on the basis of such a blocking situation that the achievable positions of the Accelerator pedals are limited and the accelerator pedal can be moved with normal force only for example, to the first position.

Compared to the prior art, the inventive method has the advantage that after entering a situation in which only the first position of the accelerator pedal can be reached by a very simple and quickly feasible change of

Dependency relationship between the working position and the power requirement the driver can be provided by the method, for example, the full power range of the engine or at least one necessary for a safe emergency operation of the engine performance. Thus, the driver can advantageously control the engine even in wide ranges of the load spectrum of the engine despite a limited available pedal travel range, which restricts reaching the end position of the accelerator pedal. According to one embodiment of the method according to the invention, the first dependency relationship assigns increasing power requirements to the engine to increasing values of the operating position of the accelerator pedal, wherein the end position of the accelerator pedal is assigned a maximum power requirement. In this case, in the further dependency relationship of the first position, a power requirement is assigned which lies in a range between 90% and 100% of the maximum power requirement. The maximum power requirement may correspond, for example, the full load point of the engine. This has the advantageous effect that the full power range of the engine or approximately the full performance of the engine is also available from the driver when the accelerator pedal can only be moved to the first position. The use of the vehicle, for example, connected to the engine is advantageous in this way only insignificantly or not limited, so that a failure of the vehicle due to a blocking situation of the accelerator pedal can be advantageously avoided. For example, in this way, even with a fully loaded vehicle even a fast ride or good acceleration values can be achieved even if the accelerator pedal can not be moved beyond the first position.

Due to the fact that in the further dependency relationship starting from the

Starting position are assigned to the first position increasing values of the working position increasing values of the power requirement to the engine, is advantageously effected that the driver can continue to use the accelerator pedal in the usual way and on the limited Pedalwegbereich that of the other Dependency relationship can fully exploit the engine load spectrum provided.

According to one embodiment of the invention, the further results

Dependency relationship by a compression along the axis with the values of the working position from the first dependency relationship, in particular by a linear compression. This advantageously causes the driver with respect to his

Required power-Wunsches a related to the usual situation very similar driving behavior as a function of the accelerator pedal position finds. As a result, the safety can be advantageously improved in such a situation because the driver only has to get used to the limited accelerator pedal way.

Under such a compression, it can be understood that the same values of the power requirement as in the first dependency relationship are values for the power demand

Pedal path are assigned from the pedal position range from the starting position to the end position are assigned in the further dependency relationship values for the pedal travel from the Pedalweg range from the starting position to the first position. This corresponds to a plot of such dependency relationships in a diagram in which the pedal position on one axis (eg the x-axis) and the power demand on an orthogonal other axis (eg y-axis) are plotted along the axis with the compression Values of the pedal position or the working position of the pedal. Such a compression can be achieved, for example, by multiplying each value of the working position from the first

Dependency relationship can be effected with a proportionality factor. A suitable proportionality factor (a) results, for example, from the quotient of a first path (SB) of the first position (B) with respect to the starting position (A) and a second distance (SE) of the end position (E) with respect to the starting position (A): a = SB / SE. The proportionality factor a can be constant or, for example, still have a dependence on the pedal position.

Thus, the further dependency relationship in such a compression from the first dependency relationship can result from the fact that the same value for the power requirement results for the starting position in the further dependency relationship and in the first dependency relationship and that the same value for the first position in the further dependency relationship for the power request, as in the first dependency relationship for the end position, such as the

Maximum power requirement, ie the full load point. According to one embodiment of the invention, the further results

Dependency relationship by a compression along the axis with the values of the power requirement from the first dependency relationship, in particular by a linear compression. This advantageously prevents, for example, in the case of a very severe limitation of the accelerator pedal travel, in which the first position is already 10% or, for example, 20% of the total distance from the

Starting position to the end position is the driver of the full-load point of the engine is provided by the procedure. Because with such a limitation of the accelerator pedal travel would be the range between the starting position of the accelerator pedal, which is made little or no power demand on the engine and the first position of the accelerator pedal, in which the full load point of the engine would be driven too small to meaningful control to effect the performance of the engine. Rather, in such a situation, there would be a risk of damaging the engine and other components of the vehicle due to rapid load changes. At the same time there would be a risk of endangering the safety of the driver, occupants and other road users by a vehicle no longer meaningful to control or regulate in the performance of its engine. By a compression along the axis with the values of

Power demand can thus be advantageously created a further dependency relationship, with which a meaningful part of the power spectrum of the engine can be controlled with the still available range of the accelerator pedal travel, in order to be able to drive in this way, for example reliable and safe in a kind of emergency operation a workshop. The achievable part of the power spectrum of the engine can be significantly larger in the further dependency relationship than the achievable range of the power spectrum, which is in the still available range of the

Accelerator pedal path from the first dependency relationship results.

Under such a compression can be understood that for the same values of the pedal position or the working position of the accelerator pedal, those in the first

Dependent Relationship Assigned values for the benefit request are now assigned lower or proportionally lower values for the benefit request in the further dependency relationship. When applying such

Dependency relations in a diagram in which the pedal position on one axis (eg x-axis) and the power demand on an orthogonal other axis (eg y-axis) are plotted corresponds to a compression along the axis with the values of the power requirement (eg y-axis). Such compression can be achieved, for example, by multiplying each value of the Power request from the first dependency relationship with a proportionality factor b are effected. In this case, the proportionality factor b, for example, be less than or equal to 1. It can either be constant (linear

Compression) or even have a dependence on the working position of the accelerator pedal.

According to one embodiment of the invention, in a transitional period between the occurrence of the defined event and the use of the other

Dependency relationship uses at least one temporary dependency relationship between the performance request and the work item. This has the advantageous effect that after a determination of the defined event, the driver is not suddenly confronted with an abruptly changed dependency relationship. For example, it can be prevented that in the event that the accelerator pedal is in the first position upon detection of the defined event, a sudden increase in power of the engine occurs with a corresponding acceleration of the vehicle. Such a situation could occur if suddenly from the first

Dependency relationship, in which for the first position of the accelerator pedal, for example, a mean power demand is made to the motor or determined for the engine, is switched to the further dependency relationship for which results in the first position, for example, the full load point. By the proposed

Embodiment of the invention, at least in a transitional period, for example, takes several seconds, for example at least 5 seconds, preferably at least 10 seconds, most preferably at least 30 seconds, at least one temporary dependency relationship to determine the

Power requirement used on the engine. The at least one temporary

Dependency relationship is preferably designed such that it allows a smooth transition from the first dependency relationship to the further dependency relationship with respect to the values of the power demand determined by the method as a function of the accelerator pedal position or the working position.

The fact that for each value of the working position, the relative difference between the performance requirements for this work position from two successive dependency relationships or temporary dependency relationships is at most 5%, in particular at most 1%, is advantageously effected until the use of the further dependency relationship no jerky Change in the

Behavior of the engine when operating the accelerator pedal is present, but that the Relationship between the accelerator pedal position and the requested power demand on the engine changes substantially continuously and steadily.

According to one embodiment of the invention, the accelerator pedal is designed as an active accelerator pedal, in which an actuator element acting on the accelerator pedal is provided. This can advantageously a fault of a blocked actuator element, which limits the reachable range of the accelerator pedal travel in a simple manner

be caught so that the driver e.g. is at least enabled to drive his affected by this error vehicle to the nearest workshop.

According to one embodiment of the invention, the dependency relationships between the power demand and the working position may be stored as a pedal characteristic in a memory, wherein in the pedal characteristic values of

Performance requirements are assigned values of pedal positions. The

Dependent relationships may be stored simultaneously or alternatively as a map in a memory, wherein in the map values of performance requirements values of pedal positions are assigned. At the same time or alternatively, the dependency relationships can also be stored as one or more functional relationships in a memory, wherein a value for the power requirement can be calculated or determined or determined from the functional relationship or from the functional relationships for a value of a pedal position. This advantageously has the effect that the dependency relationships are accessible in a simple and fast manner, for example for a control unit or a control unit. To the transition from the first dependency relationship to the other

To make dependency relationship clear to the operator of the accelerator pedal can be provided a warning lamp or a warning signal. Furthermore, it can be provided to make the transition from the first dependency relationship to the further dependency relationship dependent on an active confirmation of the operator of the accelerator pedal, for example by the operation of a button, a button or generally a haptic or audible or optical input element. To increase the security can be provided that the use of others

Dependency relationship requires at least one return of the accelerator pedal to its initial position after the occurrence of the defined event. Also the

Maintaining the accelerator pedal in its initial position for a defined

Holding period, for example, at least 3 seconds, preferably at least 5 seconds, most preferably at least 10 seconds, can after The occurrence of the defined event, the prerequisite for the further dependency relationship to be used to determine the power demand on the engine from the method. According to a second aspect of the invention, a power control arrangement is proposed for an engine, in particular for an engine of a motor vehicle, on which a method according to the embodiments presented above is carried out or

is carried out. This power control arrangement allows the control of, for example, the full load point of the engine or at least one load point of the engine, with which an emergency operation is possible, even in a situation in which the pedal travel of an accelerator pedal for specifying a desired power request to the engine is limited such that a End position of the accelerator pedal is no longer available. This is achieved in that the power control arrangement includes a movable between an initial position and an end position accelerator pedal and further comprises a sensor for detecting a working position of the accelerator pedal and a

Control unit for determining the power demand on the engine. In this case, the performance request determining control unit uses a first dependency relationship between the power request and the work position or another dependency relationship between the power request and the work position. The use of the first dependency relationship or the further dependency relationship depends on the occurrence of a defined event and is determined by the method presented above.

Compared to the prior art, the inventive

Power control arrangement advantageously at least one emergency operation or even operation up to the full load of the engine even in situations where the end position of the accelerator pedal is not or no longer reachable. As a result, a driver can at least be enabled to start up a workshop in the event of a fault.

According to a third aspect of the invention, a computer program product is proposed which contains a program code which, when stored on a computer program

Data processing unit is executed, the method performs according to one of the embodiments presented above. This advantageously ensures that the method is largely automated, for example in a control unit

can be carried out. drawings

Other features and advantages of the present invention will become apparent to those skilled in the art from the following description of exemplary embodiments, which are not to be construed as limiting the invention with reference to the accompanying drawings.

Show it:

Fig. 1a is a schematic representation of a power control arrangement for an engine of a motor vehicle;

FIG. 1b shows a first dependency relationship between a power demand and a working position in a representation as a pedal characteristic; FIG.

2a is a common representation of the first dependency relationship and another dependency relationship between the power request and the

Working position in a diagram as a pedal characteristic;

2b shows a representation according to FIG. 2a with a plurality of temporary

Dependency relationships between the first dependency relationship and the further dependency relationship; Fig. 3 shows another embodiment of the further dependency relationship in a representation as a pedal characteristic.

All figures are merely schematic representations of the invention

Methods, devices or computer program products or their components according to embodiments of the invention. In particular distances and

Size relations are not shown to scale in the figures. In the different figures, corresponding elements are the same

Provided with reference numerals.

FIG. 1 shows a greatly simplified illustration of a power control arrangement 950. The power control arrangement 950 can, for example, in a motor vehicle 900 with a motor 910, for example as an internal combustion engine and / or electric motor can be executed, are used. About the

Power control assembly 950 may be controlled and / or regulated by means of, for example, a foot 140 of a driver operated electronic accelerator pedal 100, the power of the motor 910. For this purpose, from a sensor 200 a

Working position (S) of an accelerator pedal 100 or accelerator pedal 100 detected and depending on the working position (S) of the accelerator pedal 100, the power of the motor 910 of

Motor vehicle 900 controlled and / or regulated. In an internal combustion engine as a motor 910, for example, a throttle element, not shown here, for example, a throttle valve, is moved by an actuator and in an electric motor, the electrical power supplied to the electric motor is controlled and / or regulated accordingly. In an initial position (A) of the accelerator pedal 100 is from the engine 910th

For example, the minimum power, for example, requested as idle, while in an end position (E) of the accelerator pedal 100 by the engine 910, for example, a maximum power requirement (Pmax) is requested, which may correspond to a full load point of the engine. The motor vehicle 900 thus has an electronic gas system or an electronic accelerator pedal.

In the illustrated embodiment, the accelerator pedal 100 at a bearing 1 10 about an axis of rotation 1 12 between the initial position (A) and the end position (E)

pivoted. With an elastic element 120, which may be formed, for example, as a spring 121, a return force in the direction of the starting position (A) can be applied to the accelerator pedal 100. The spring 121 is attached to a spring bearing 124 and the accelerator pedal 100 and thus forms a

Rear sub-equipment. From a sensor 200, which may be formed, for example, as a Hall sensor or as a resistance potentiometer, a working position (S) of

Accelerator pedal 100, for example, detected as a rotation angle 130 (a) of the accelerator pedal 100. In other embodiments, accelerator pedal 100 may also generate a linear motion and sensor 200 may be configured to detect, for example, a distance traveled by accelerator pedal 100. The data on the working position (S) of the accelerator pedal 100 detected by the sensor 200 are transmitted to a control unit 500 by means of a signal line 210 shown schematically in FIG. 1 a. The control unit 500 may, for example, as a controller or as a

On-board computer of the motor vehicle 900 may be formed. The control unit 500 may have a memory, not shown, for storing data and / or functions and a processor, not shown. Depending on the data collected by the sensor 200 to the working position (S) of the accelerator pedal 100 and using a first stored for example in the memory Dependency relationship 510 between the power request (PS) and the

Working position (S) is controlled in dependence on the working position (S) of the accelerator pedal 100, the power of the motor 910 of the motor vehicle 900 and / or regulated. In the figure 1 a, the accelerator pedal 100 is shown in its initial position (A) as a solid line. The accelerator pedal 100 is shown for its end position (E) in the form of a dashed line and designated by the reference numeral 100b. A lying between the starting position (A) and the end position (E) working position (S) of the accelerator pedal 100 is shown as a dash-dotted line by the reference numeral 100a. For the end position (E) formed as a spring 121 elastic member 120 is shown in a compressed form as a dashed line.

The accelerator pedal 100 of the power control assembly 500 is shown in FIG

Embodiment designed as an active accelerator pedal. For this purpose, an actuator element 300 is provided under the accelerator pedal 100, on the side facing away from the foot 140. The actuator element 300 may be formed, for example, as a motor, which acts by means of a transmission element 310 facing away from the foot 140 side of the accelerator pedal 100 with a force which acts in addition to the force of the elastic element 120. The application of force by means of the actuator element and the transmission element 310 can take place situationally and depend, for example, on the current driving situation (speed, acceleration, distance from the vehicle ahead, etc.) and / or on reaching a specific working position (S) of the accelerator pedal. In operation, it may happen that the actuator element 300 is no longer controllable but blocked in a certain position, which is not shown here, and in such a blocked position by means of the transmission element 310 prevents the accelerator pedal 100 each working position (S) between the Starting position (A) and the end position (E) can achieve. In such a situation, for example, with normal force, that is usual with the current position of the accelerator pedal

Force, the end position (E) is no longer achievable. Only a first position (B) can be reached as a maximum working position (S), wherein the first position (B), starting from the starting position (A) between the initial position (A) and the end position (E). Of course, such a situation may also occur for a normal electronic accelerator pedal 100, which is not an active accelerator pedal. Such a situation or event defined in this way can be determined, for example, by the control unit 500, for example by an error signal from the actuator element 300 is sent out. As a result, the method according to the invention, following the power control of the motor 910, should use a further dependency relationship 550 between the working position (S) and the power requirement (PS). As a result, it can be achieved that the power of the engine can still be used as meaningfully or completely as possible even with a limited range of achievable working positions (S) of the accelerator pedal 100.

The first dependency relationship 510 may be, for example, a

Actuate pedal characteristic in which values of power requirements (PS) values of working positions (S) are assigned. It may be at the first

Dependent relation 510 also act around a map, wherein in the map values of power requirements (PS) values of working positions (S) or

Pedal positions are assigned. The first dependency relationship 510 can also be designed as a functional relationship in which the value of a

Working position (S) or a pedal position, a value for the power demand (PS) can be calculated. It is possible to have such dependency relationships,

For example, the first dependency relationship 510 is plotted in a diagram in which, for example, the values of the pedal position or the working position (S) of the accelerator pedal are shown on the x-axis and the values of the power demand (PS) assigned to these values are shown on the y-axis. , Such representations in

Diagram form for the first dependency relationship 510 as well as for others

Dependency relationships are shown in FIGS. 1 b to 3.

1 b shows the first dependency relationship 510 in a diagram in which the working position (S) or the pedal position detected by the sensor 200 is shown on the x-axis. The working position (S) can lie between the initial position (A) shown in the origin and the end position (E). Depending on

Embodiment of the accelerator pedal, the working position (S) can be measured, for example, as a rotation angle α in degrees or, for example, as a distance s in a unit length, e.g. in millimeters. On the y-axis is that of the engine 910

to be requested power P in Newtonmeter or the requested torque T applied in Newton meters. Each working position (S) is assigned a performance requirement (PS). The relationship between working position (S) and power demand (PS) can be read or determined from the illustrated solid line, a pedal characteristic, the first dependency relationship 510. Achieve that

Accelerator pedal the end position (E), the maximum power requirement (Pmax) is reached. The dependency relationship is increasing for increasing accelerator pedal positions Performance requirements and reaches the Maximai performance requirement for the end position (E).

2a shows in a single diagram the first dependency relationship 510 from FIG. 1b and a further dependency relationship 550 used by the method after occurrence of the defined event, for example. On the x-axis, the maximum position which can still be reached after the occurrence of the defined event is reached (B) of the accelerator pedal 100 shown. The further dependency relationship 550 results in the illustrated

Diagram from the first dependency relationship 510, adding the first

Dependency relationship 510 along the x-axis is compressed. In this case, for the starting position (A), the value of the power requirement (P) for the first

Dependency relationship 510 and equal to 550 for the further dependency relationship.

The maximum power requirement (Pmax) is achieved in the illustrated diagram for a virtual working position (F), which in this case corresponds to the first position (B). The further dependency relationship 550 shown here thus allows within the achievable pedal travel from the initial position (A) to the first position (B) the utilization of the full power spectrum or the full power requirements of the motor 910. In FIG. 2a, for a working position (S ), which between the

Starting position (A) and the first position (B), lies for the first

Dependency relationship 510 a specific performance requirement (PSO). When using the further dependency relationship 550 after the occurrence of the defined event, on the other hand, a greater value of the power requirement (PS5) results for the same working position (S). The further dependency relationship 550 may, for example, result from the first dependency relationship 510 by multiplying the associated value of the pedal position by a proportionality factor a for each value of the power requirement. The proportionality factor a can be constant or have a dependence on the working position (S).

For example, the proportionality factor a can be derived from the following equation: a = SB / SE, where SB corresponds to the position difference from the first position (B) and the starting position (A) and SE is the position difference from the end position (E) and the

Starting position (A) corresponds. Likewise, the further dependency relationship 550 may be formed by a compression of the first dependency relationship 510 along the y-axis. Or by a compression along the x-axis and the y-axis, where, for example, different compression factors or proportionality constants can be used for the compression along the x-axis and along the y-axis. In this way, it can be achieved, for example, that in the diagram of FIG. 2a, with an additional compression along the y-axis at the first position (B) of the accelerator pedal 100, the maximum power requirement (Pmax) is not called up. Rather, a value is determined which is below the maximum power requirement (Pmax) but at the same time above the power requirement that is determined for the first position (B) when using the first dependency relationship 510 of the method.

In Fig. 2b, the diagram of Fig. 2a is reproduced again. In addition, four temporary dependency relationships 512, 514, 516, 518 are shown here by way of example. These temporary dependency relationships 512, 514, 516, 518 may also be due, for example, to increased compression of the first

Dependency relationship 510 along the pedal position axis or the x-axis. The temporary dependency relationships 512, 514, 516, 518 are between the first dependency relationship 510 and the further dependency relationship 550. The method may include between using the first dependency relationship 510 and the further dependency relationship 550 in a transition period Δt between the occurrence of the defined event and the one Using the further dependency relationship 550 sequentially use the temporary dependency relationships 512, 514, 516, 518 to obtain a work position (S)

Power requirement to the engine 910 to determine. In this case, for each of the temporary dependency relationships 512, 514, 516, 518, the maximum power requirement (Pmax) for each virtual work position (F1, F2, F3, F4) is specified, which is incrementally from the end position (E) to the virtual work position (F) the other

Dependency relationship 550 move. Through the temporary

Dependency relationships 512, 514, 516, 518 it is achieved that the transition from the first dependency relationship 510 to the further transition relationship 550 does not occur abruptly, but rather a step-by-step adaptation takes place, which enables the driver to adapt to the new circumstances of the method. At a

Working position, which corresponds to the first position (B) resulting in the transition from a dependency relationship to the next dependency relationship thus each incremental increases in the power requirement, in the figure 2b by the distances along the y-axis with the designations ΔΡ1, ΔΡ2, ΔΡ3, ΔΡ4 and ΔΡ5 are shown.

In a fixed working position (S), the increasing power demand on the motor occurring incrementally at each transition from one dependency relationship to the next dependency relationship occurs incrementally, as described below. From the first dependency relationship 510 to the first temporary dependency relationship 512, the power requirement at the fixed working position (S) increases from PSO to PS1. From the first temporary dependency relationship 512 to the second temporary dependency relationship 514, the power request then increases to PS2, from the second temporary dependency relationship 514 to the third temporary

Dependency relationship 516, the performance request increases to the value PS3 and from the third temporary dependency relationship to the fourth temporary one

Dependency relationship 518, it goes from PS3 to PS4. Finally, the further dependency relationship 550 is used, for which a power requirement of PS5 is used for the fixed working position (S) shown here by way of example.

Preferably, the temporary dependency relations are staggered so close to one another that for each fixed working position (S) between the starting position (A) and the first position (B) the incremental increase of the power demand between two consecutive dependency relationships is not more than 5%, ideally not more than 1 %.

The transition period from the use of the first dependency relationship 510 to the further dependency relationship 550 may be several seconds, for example up to 30 seconds or even 60 seconds. The number of temporary dependency relationships can depend on the position of the first position: the closer the first position (B) is to the starting position (A), the more temporary dependency relationships can be provided, for example. The temporary dependency relationships may each be for a certain period of time, for example a few milliseconds, e.g. 10ms, up to several seconds, e.g. 5s before the next dependency relationship is used.

In Fig. 3 is a diagram with another embodiment of the other

Dependency relationship 550. The other shown here

Dependency relationship 550 has the Maximai performance requirement (Pmax) for a virtual work position (F). The virtual working position (F) lies between the first position (B) which can still be achieved by the accelerator pedal 100 and the end position (E). The further dependency relationship 550 may result from the first dependency relationship 510, for example, due to a compression along the x-axis. The further dependency relationship 550 shown here then leads in the first position (B) of the accelerator pedal 100 to a maximum achievable power requirement (PSmax) which is reduced in relation to the maximum power requirement (Pmax). In this way, the introduction of the virtual working position (F) can easily create a further dependency relationship 550 for which the maximum power requirement (PSmax) achievable in the first position (B) is reduced compared to the maximum power requirement (Pmax), but is still higher than the first dependency relationship 510. At the same time, an (additional) compression of the first dependency relationship 510 along the y axis can be dispensed with in this way in order to create the further dependency relationship 550. The proposed method may for example be stored as a computer program product in a memory of the control unit 500 and executed on a processor of the control unit 500 in dependence on various input parameters. The proposed method or power control arrangement 950 can generally be used for the determination of power requirements or in the control of engines in motor vehicles, which uses an electronic accelerator pedal or an electronic accelerator pedal.

Claims

claims

1 . Method for controlling and / or regulating the power of a motor (910), in particular of a motor (910) of a motor vehicle (900), comprising the steps of: detecting a working position (S) between a starting position (A) and an end position (E ) movable accelerator pedal (100),

~ Determination of a power demand (PS) to the engine (910) under

Use of a first dependency relationship (510) between the

Working position (S) and the power demand (PS), characterized in that after the occurrence of a defined event, the power demand (PS) to the motor (910) using a further dependency relationship (550) between the working position (S) and the power requirement ( PS), wherein the defined event is a situation in which the accelerator pedal (100) can be moved with normal force only to a first position (B), wherein the first position (B) between the initial position (A) and the end position (E) is located.

2. The method according to claim 1, characterized in that

the first dependency relationship (510) assigns increasing power requirements (PS) to the motor (910) to increasing values of the working position (S) of the accelerator pedal (100),

wherein the end position (E) of the accelerator pedal (100) is a maximum

Power requirement (Pmax) is assigned,

wherein in the further dependency relationship (550) the first position (B) is assigned a power demand (PB) which is in a range between 90% and 100% of the maximum power requirement (Pmax).

3. The method according to claim 2, characterized in that in the further

Dependent relationship (550) starting from the initial position (A) to the first position (B) increasing values of the working position (S) are associated with increasing values of the power requirement (PS) to the motor (910).

4. The method according to claim 1, characterized in that

the further dependency relationship (550) is due to a compression along the Axis with the values of the working position (S) from the first

Dependency relationship (510), in particular by a linear compression.

Method according to one of the preceding claims, characterized in that

the further dependency relationship (550) is due to a compression along the axis with the values of the power requirement (PS) from the first

Dependency relationship (510), in particular by a linear compression.

Method according to one of the preceding claims, characterized in that in a transitional period (At) between the occurrence of the defined event and the use of the further dependency relationship (550) at least one temporary dependency relationship (512, 514, 516, 518) between the power requirement (PS ) and the working position (S) is used to the power requirement (PS) to the motor (910) of the working position (S) of the

Assign accelerator pedal (100).

A method according to claim 6, characterized in that

for each value of working position (S) the relative difference of this for

Working position (S) determined performance requirements (PS) of two

successive dependency relationships (510, 512, 514, 516, 518, 550) is at most 5%, in particular at most 1%.

Method according to one of the preceding claims, characterized in that

the accelerator pedal (100) is an active accelerator pedal, in which an actuator element (300) acting on the accelerator pedal (100) is provided.

Method according to one of the preceding claims, characterized in that

the dependency relationships (510, 550, 512, 514, 516, 518) between the power demand (PS) and the work position (S)

as a pedal characteristic are stored in a memory, wherein in the pedal characteristic values of performance requirements values of pedal positions are assigned, or that the dependency relationships (510, 550, 512, 514, 516, 518) between the power requirement (PS) and the working position (S ) are stored as a map in a memory, wherein in the map values of power requirements Values of pedal positions are assigned,

or that the dependency relationships (510, 550, 512, 514, 516, 518) between the power request (PS) and the work position (S) are stored as one or more functional relationships in a memory, wherein the functional relationship or calculate a value for the performance request from the value of a pedal position.

Power control arrangement for an engine (910), in particular for an engine (910) of a motor vehicle (900), on which a method according to one of

preceding claims is performed,

the power control arrangement comprising:

~ an accelerator pedal (100) which can move between an initial position (A) and an end position (E),

~ a sensor (200) for detecting a working position (S) of the accelerator pedal (100), ~ a control unit (500) for determining the power requirement (PS) to the motor (910),

wherein the power demand (PS) determination unit (500) has a first dependency relationship (510) between the power demand (PS) and the work position (S) or another dependency relationship (550) between the power demand (PS) and the work position (S) used.

1 1. A computer program product containing program code which, when executed on a data processing unit, performs the method of any one of claims 1 to 10.