DE102017213751A1 - Method of operating a tachometer and tachometer - Google Patents

Abstract

The invention relates to a method for operating a tachometer (4) of a hybrid vehicle (1), wherein a first speed value (10) of an internal combustion engine (2) of the hybrid vehicle (1) with a first speed indicator element (8) of the tachometer (4) on a Dial (12) of the tachometer (4) is output and a second speed value (11) of an electric motor (3) of the hybrid vehicle (1) with a second speed indicator element (9) of the tachometer (4) is output, wherein the second speed value (11) with the second speed display element (9) on the same dial (12) is output.

Description

The invention relates to a method for operating a tachometer of a hybrid vehicle. A first rotational speed value of an internal combustion engine of the hybrid vehicle is output with a first rotational speed indicator of the tachometer on a dial of the tachometer. Furthermore, a second rotational speed value of an electric motor of the hybrid vehicle is output with a second rotational speed indicator element of the tachometer. The invention also relates to a tachometer for a hybrid vehicle. The tachometer has a first speed indicator, a second speed indicator, and a dial. The first speed display element is arranged on the dial and adapted to output a first speed value of an internal combustion engine of the hybrid vehicle on the dial.

Tachometers are known. A tachometer, also known as a trip counter, is a measuring device that measures and displays the speed of a shaft. Tachometers are available in various designs, such as mechanical or electrical. In vehicle construction, tachometers are used to monitor the running or speed of machines and engines and to maintain them in a damage-free, economically optimal or a specially required operating range.

The tachometer is usually arranged in the cockpit area of a motor vehicle. The tachometer usually comprises a housing with a glass pane and a dial arranged behind the pane of glass. On the dial then the numbers are arranged to read a speed. The numbers are usually arranged as a scale. The numbers may be printed on the dial, for example, or may be output from a liquid crystal display. A current speed is then usually output by a pointer on the dial.

In the present case, the interest applies to a motor vehicle, which is designed as a hybrid vehicle and has an internal combustion engine and an electric motor in each case as a main drive unit whose speeds are displayed.

It is an object of the present invention to provide a method and a tachometer for a hybrid vehicle, in which or with which a speed can be detected faster.

This object is achieved by a method and a tachometer according to the independent claims.

In a method according to the invention, a tachometer of a hybrid vehicle is operated. A first, in particular current, rotational speed value of an internal combustion engine of the hybrid vehicle with a first rotational speed indicator element of the tachometer is output on a dial of the tachometer. Furthermore, a second, in particular current, rotational speed value of an electric motor of the hybrid vehicle is output with a second rotational speed indicator element of the tachometer. An important idea is that the second speed value is output with the second speed indicator on the same dial as the first speed value.

The invention is based on the finding that the operating state of the motor vehicle or hybrid vehicle can be detected faster by outputting the first rotational speed value from the internal combustion engine and the second rotational speed value from the electric motor on the same dial. That The speeds of both drive units can be detected together faster. It is now no longer necessary for a driver of the hybrid vehicle to turn his head sideways or to focus his eyes on several objects in order to be able to detect and read the two rotational speed values at the same time. The hybrid vehicle is operated thereby safer.

By outputting the first speed value and the second speed value on the same dial, it can be detected at a glance in which state the internal combustion engine and the electric motor are.

The dial has in particular a round, in particular a circular, contour and is preferably formed in one piece. Optionally arranged on the dial strokes or digits are thus preferably arranged in the form of a pitch circle on the dial.

In particular, the dial is formed in one piece, so not in several parts in the way that the various parts are spaced from each other in the cockpit. The dial is preferably formed as a disc on which numbers or at least tick marks are printed. However, the dial can also preferably be designed as a light display unit, for example as a liquid crystal display with, for example, LEDs (LED light emitting diode) or OLEDs (OLED - organic light emitting diode) or with a polycarbonate film. Furthermore, the dial may also have a combination of printed numerals or dashes and numbers or dashes, which are represented by the illuminated display unit.

Preferably, it is provided that the dial is illuminated when outputting the first speed value with the first speed indicator element in a first color and the dial is illuminated when issuing the second speed value with the second speed indicator element in a different color from the first color. So it may for example be that if only the engine is active and thus only the first speed value is output, the dial in the first color, for example, red, lit and if, for example, only the electric motor is active, the dial with the second color, for example green, illuminated. But it may also be that the dial is illuminated in a third color, if both the engine and the electric motor are active. For example, the third color is blue. The illumination of the dial is done for example by at least partial backlighting of the dial or by arranged in front of the dial luminous elements or by the first speed indicator and / or the second speed indicator itself. Thus, for example, in the first speed indicator and / or the second speed indicator a light unit or a plurality of light units may be arranged. By the light units, for example, different colors can be output. The first speed indicator element and the second speed indicator element may, for example, also be present as a common speed indicator element, so that the color of the common speed indicator element changes accordingly, depending on which speed, namely the first speed value or the second speed value, is output with the common speed indicator element. The lighting can be done for example by means of LEDs, which are then arranged in the respective speed indicator or the dial.

Furthermore, it is preferably provided that a maximum rotational speed of the internal combustion engine is output with a third rotational speed indicator element of the tachometer and / or a maximum rotational speed of the electric motor with a fourth rotational speed indicator element of the tachometer. In particular, the maximum speed of the electric motor in the present case is not a classic maximum speed as known from internal combustion engines, but the maximum speed at which the electric motor can still meet the driver's current power or torque requirement. If the maximum speed of the electric motor exceeds this limit, the internal combustion engine is preferably started. That the maximum speed of the electric motor is preferably variable, that is not constant, but depends on the power requirement of the driver and preferably on the condition of the motor vehicle, such as a traction battery temperature or a traction battery voltage. The third speed indicator element and / or the fourth speed indicator element is preferably designed as a pointer. The pointer is arranged in particular concentric with the first speed indicator element and / or second speed indicator elements, which are preferably also designed as hands. However, the third speed indicator element and / or the fourth speed indicator element can also be embodied, for example, as a bar or marking or luminous marking, which is, for example, actively or passively illuminated, on the dial. The maximum speed preferably indicates up to what limit the internal combustion engine and / or the electric motor can be operated in an energy-efficient, low-emission, low-noise and / or damage-free manner. Thus, a maximum possible power requirement of the electric motor or the internal combustion engine can be output. The hybrid vehicle can thus be operated safely.

Furthermore, it is preferably provided that the first speed value is output with a first speed indicator element on a scale on the dial and the second speed value is output on the same scale on the dial. This means that both the speed of the engine and the speed of the electric motor are output on the scale. Preferably, the dial has only one scale. The scale is then shared by the first speed indicator and the second speed indicator. In particular, however, the first speed indicator element and the second speed indicator element can also be designed as a common speed indicator element which differs, for example, only by the color of the common speed indicator element itself and / or by the color of the dial. By using only one scale, the dial is made clearer and the hybrid vehicle can be operated safely.

It can also be provided that the first rotational speed value is output with the first rotational speed indicator element on a first scale on the dial, and the second rotational speed value is output on a different second scale from the first scale on the dial. For example, it may be that two scales are arranged on the dial. The two scales may for example be printed on the dial or be represented by lighting, such as light emitting diodes, or output of a light display unit on the dial. The first scale and the second scale can be side by side on the dial be arranged, but preferably the first scale and the second scale are arranged in the direction of the vehicle vertical axis one above the other on the dial. By arranging the scales one above the other, a viewer, in particular a driver of the hybrid vehicle, can only see downwards, ie without moving the head sideways, to grasp both scales. As a result, the driver is distracted from the traffic shorter and the hybrid vehicle can be operated safely.

Furthermore, it is preferably provided that a current driving state of the hybrid vehicle is detected and depending on the detected driving state, a gearshift recommendation for a manual transmission of the hybrid vehicle is displayed by the tachometer, preferably by means of a display element on or in the dial. The current driving state preferably comprises a torque request, a vehicle inclination, in particular a pitch angle, on the basis of which a slope of the road can be deduced, and a sportiness factor, which is for example given by the driver, and a state of charge of a main drive battery of the hybrid vehicle. The manual transmission is designed in particular as a vehicle transmission and connected to a main drive unit of the hybrid vehicle, in particular the internal combustion engine and / or the electric motor. By the gearshift recommendation is issued in particular, with which gear the hybrid vehicle can be operated for the current situation most economical. Thus, the gearshift recommendation in particular gives an indication that a gear change is recommended in order to avoid a current underspeed or overspeed of the internal combustion engine and / or the electric motor or to indicate an energetically favorable operating point or an operating point, which is characterized by a high system performance ,

The invention also relates to a tachometer for a hybrid vehicle. The tachometer has a first speed indicator, a second speed indicator, and a dial. The first speed indicator element is arranged on the dial and adapted to output a first, in particular current, speed value of an internal combustion engine of the hybrid vehicle on the dial. An important idea is that the second speed indicator element is arranged on the same dial and is adapted to output a second, in particular current, speed value of an electric motor of the hybrid vehicle on the dial.

With the arrangement of the first speed indicator element and / or the second speed indicator element on the dial, it is meant that the speed indicator elements formed, for example, as hands are in front of the dial, so refer to the dial or integrated into the dial, if the dial, for example, electronically is formed, for example, as a light display unit, in particular liquid crystal display. Instead of a liquid crystal display can also be a, for example, imaging LED (LED - light-emitting diode) can be used.

In particular, it is provided that the first speed indicator element and the second speed indicator element are designed as a common speed indicator element. Due to the common speed indicator element, the tachometer has in particular only a common pointer or a common line or a common ink ribbon. By the common speed indicator element, both the first rotational speed of the internal combustion engine and the second rotational speed of the electric motor can then be output. For example, the common speed indicator may indicate the first speed when the common speed indicator and / or the dial has a first color. Further, however, the common speed indicator may also indicate the second speed value when the common speed indicator and / or the dial has a second color. The first color is different in particular from the second color. The common speed indicator element can also be created, for example, by superposing the first speed indicator element and the second speed indicator element, at least temporarily. For better discrimination, the common speed indicator element may be thicker than the first speed indicator or the second speed indicator. The common speed indicator element may also be formed in one piece and nevertheless comprise the first speed indicator element and the second speed indicator element. Thus, the training can depend on the color in which the pointer is illuminated.

But it can also be provided that the first speed indicator element and the second speed indicator element are formed differently from each other. For example, the first speed indicator element can be present as a separate pointer to the second speed indicator element, and the second speed indicator element can likewise be present as a pointer formed separately from the first speed indicator element. Preferably, the first speed indicator and the second speed indicator are formed spaced apart in this embodiment. The first speed indicating element and the second speed indicating element may in this case be stored concentrically, for example. However, it may be that the first speed indicator element and the second speed indicator element are formed collinear with each other.

Furthermore, it is preferably provided that the first speed indicator element and / or the second speed indicator element is designed as a pointer. The pointer can be present, for example, as an objective plastic element or be created by their reproduction by means of a light display unit, such as a liquid crystal display. For example, the pointer may have a tip to more accurately point to a particular digit of the dial. By the pointer, the tachometer can be read easier and faster and the vehicle or hybrid vehicle can be operated safely.

Furthermore, the invention also relates to a hybrid vehicle with an internal combustion engine, an electric motor and a tachometer according to the invention.

Advantageous embodiments of the method according to the invention are to be regarded as advantageous embodiments of the tachometer and the hybrid vehicle. The subject components of the tachometer and the hybrid vehicle are each adapted to perform the respective process steps.

Further features of the invention will become apparent from the claims, the figures and the description of the figures. The features and feature combinations mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respectively specified combination but also in other combinations or in isolation, without the frame to leave the invention.

Embodiments of the invention are explained in more detail below with reference to schematic drawings.

• 1 eine schematische Seitenansicht eines Ausführungsbeispiels eines erfindungsgemäßen Hybridfahrzeugs mit einem erfindungsgemäßen Drehzahlmesser;
• 2 eine schematische Darstellung eines Ausführungsbeispiels des Drehzahlmessers mit einem ersten Drehzahlanzeigeelement und einem zweiten Drehzahlanzeigeelement, welche auf einem Ziffernblatt des Drehzahlmessers angeordnet sind;
• 3 eine weitere schematische Darstellung eines Ausführungsbeispiels des Drehzahlmessers, wobei ein erster Drehzahlwert des Verbrennungsmotors und ein zweiter Drehzahlwert des Elektromotors gleichzeitig angezeigt werden;
• 4 eine weitere schematische Darstellung eines Ausführungsbeispiels des Drehzahlmessers mit einer ersten Skale und einer zweiten Skale;
• 5 eine weitere schematische Darstellung eines Ausführungsbeispiels des Drehzahlmessers mit einer Gangschaltempfehlung für das Hybridfahrzeug;
• 6 eine weitere schematische Darstellung eines Ausführungsbeispiels des Drehzahlmessers, bei welchem das erste Drehzahlanzeigeelement und das zweite Drehzahlanzeigeelement als ein gemeinsames Drehzahlanzeigeelement ausgebildet sind und das Ziffernblatt in einer ersten Farbe beleuchtet wird;
• 7 eine weitere schematische Darstellung eines Ausführungsbeispiels des Drehzahlmessers mit dem gemeinsamen Drehzahlanzeigeelement und einem dritten Drehzahlanzeigeelement zum Ausgeben einer maximalen Drehzahl; und
• 8 eine weitere schematische Darstellung eines Ausführungsbeispiels des Drehzahlmessers mit dem dritten Drehzahlanzeigeelement, wobei das dritte Drehzahlanzeigeelement als Leuchtstiche ausgebildet sind.

Show it:

• 1 a schematic side view of an embodiment of a hybrid vehicle according to the invention with a tachometer according to the invention;
• 2 a schematic representation of an embodiment of the tachometer with a first speed indicator element and a second speed indicator element, which are arranged on a dial of the tachometer;
• 3 a further schematic representation of an embodiment of the tachometer, wherein a first speed value of the internal combustion engine and a second speed value of the electric motor are displayed simultaneously;
• 4 a further schematic representation of an embodiment of the tachometer with a first scale and a second scale;
• 5 a further schematic representation of an embodiment of the tachometer with a gearshift recommendation for the hybrid vehicle;
• 6 a further schematic representation of an embodiment of the tachometer, wherein the first speed indicator element and the second speed indicator element are formed as a common speed indicator element and the dial is illuminated in a first color;
• 7 a further schematic representation of an embodiment of the tachometer with the common speed indicator element and a third speed indicator element for outputting a maximum speed; and
• 8th a further schematic representation of an embodiment of the tachometer with the third speed indicator element, wherein the third speed indicator element are designed as light strokes.

In the figures, identical or functionally identical elements are provided with the same reference numerals.

1 shows a hybrid vehicle 1 in a partially sectioned side view. The hybrid vehicle 1 has an internal combustion engine 2 , an electric motor 3 and a tachometer 4 on.

The internal combustion engine 2 and the electric motor 3 are according to the embodiment in a front area 5 of the hybrid vehicle 1 arranged, however, is the arrangement of the electric motor 3 and the internal combustion engine 2 varied within the hybrid vehicle 1 possible.

The internal combustion engine 2 is operated, for example, with gasoline, diesel or gas. The electric motor 3 is preferably operated with a chemical energy storage, in particular a battery.

The tachometer 4 is according to the embodiment in a cockpit area 6 of the hybrid vehicle 1 arranged. The tachometer 4 But also in a variety of other positions in the hybrid vehicle 1 be arranged, but preferably such that a driver 7 of the hybrid vehicle 1 the tachometer 4 during operation of the hybrid vehicle 1 can be read without occlusion.

2 shows an embodiment of the tachometer 4 , The tachometer 4 has a first speed indicator element 8th and a second speed indicator 9 on. With the first speed indicator element 8th becomes a first speed value 10 of the internal combustion engine 2 output. With the second speed indicator element 9 becomes a second speed value 11 of the electric motor 3 output. The speed values 10 . 11 are in particular current speed values, which is the current state of the internal combustion engine 2 or the electric motor 3 describe.

Furthermore, the tachometer 4 a dial 12 on. The dial 12 is formed according to the embodiment as a flat, circular disk. Further, the dial faces 12 a scale 13 on. The scale 13 is in particular a succession of a number of graduations on the dial 12 , The division by the graduations may be uniform or as required, uneven. The scale 13 serves to do this by means of the first speed indicator element 8th and / or the second speed indicator element 9 at least the first speed value 10 and / or the second speed value 11 display. The scale 13 For example, it may be supplemented with at least one number and / or with at least one unit.

The first speed indicator element 8th and the second speed indicator 9 are on the dial 12 arranged. According to the embodiment, the first speed display element 8th and the second speed indicator 9 each formed as a pointer, which concentrically at a common center 14 are attached.

Furthermore, according to the embodiment, the first speed display element 8th with a first color 15 illuminated and the second speed indicator element 9 comes with a second color 16 illuminated. The first color 15 For example, it can be red and the second color 16 may be green, for example.

The first speed indicator element 8th and / or the second speed indicator element 9 may for example be present as a mechanical pointer or be formed by a liquid crystal display. The lighting of the first color 15 and / or the second color 16 can then for example also be designed such that the respective speed indicator element 8th . 9 self-luminous, for example, with a light-emitting diode, is formed or by a light source in the environment, for example, behind or next to the dial 12 , is illuminated and reflects the colored light.

According to the embodiment of 2 is the internal combustion engine 2 inactive and the first speed value 10 is zero. The electric motor 3 on the other hand, it is active and, consequently, the second speed indicator element 9 the second speed value 11 deviating from zero and output as a positive value.

According to the embodiment, the second speed value 11 through the tachometer 4 but also be output as a negative value. So can the second speed indicator element 9 for example, the second speed value 11 as a negative value if the hybrid vehicle 1 with reverse gear engaged electrically.

3 shows the embodiment analogous to 2 However, both the internal combustion engine 2 as well as the electric motor 3 active. Through the first speed indicator element 8th becomes the first speed value 10 now also as a positive value by the tachometer 4 output.

By a direction arrow 17 it is shown in which direction the first speed indicator element 8th and / or the second speed indicator element 9 turns if the first speed value 10 and / or the second speed value 11 elevated.

4 shows a further embodiment of the tachometer 4 , The tachometer 4 indicates on the dial 12 a first scale 18 and a second scale 19 on. The first scale 18 is through the first speed indicator element 8th to display the first speed value 10 provided and the second scale 19 is for the second speed indicator element 9 to display the second speed value 11 intended. The first speed indicator element 8th is especially at a different location on the dial 12 fastened as the second speed indicator element 9 , The first speed indicator element 8th and / or the second speed indicator element 9 For example, each may be formed as a ribbon or as a sub-pointer. But it may also be, for example, that only the second speed indicator element 9 is designed as a pointer and the first speed indicator element 9 is designed as a ribbon.

On the dial 12 For example, it can be expressed as a unit of RPM (revolutions per minute). The unit can, for example, on the dial 12 be imprinted or, if the dial is electronically formed, be issued by a part of the light display unit.

5 shows a further embodiment of the tachometer 4 , It will be a gearshift recommendation 20 displayed. The gearshift recommendation 20 is indicated by a gearshift recommendation indicator 21 displayed. The gearshift recommendation indicator 21 May be next to the dial 12 or on the dial 12 be arranged. Preferably, the gearshift recommendation indicator is 21 in so many cuts 22 divided as a transmission of the hybrid vehicle 1 Has aisles.

The gearshift recommendation 20 in particular depends on a current driving state of the hybrid vehicle 1 output. The driving state is preferably detected by a function of torque request, incline, vehicle state, sportiness factor, driver state or state of charge of a battery.

The gearshift recommendation 20 indicates when a shift is necessary to avoid underspeed or overspeed, or to achieve an energetically favorable operating point, or operating point, characterized by high system performance. The gearshift recommendation 20 is preferably by a color coding and / or a flashing and / or by a in the interior of the hybrid vehicle 1 displayed sound or to the driver 7 output.

6 shows a further embodiment of the tachometer 4 in which the first speed indicator element 8th and the second speed indicator 9 as a common speed indicator element 23 are formed. Through the common speed indicator element 23 becomes the first speed value 10 and / or the second speed value 11 output. The common speed indicator element 23 For example, it can change color and thereby indicate if it is the first speed value 10 or the second speed value 11 or both speed values 10 . 11 simultaneously, for example added, outputs. But it may also be that not the common speed indicator element 23 its color changes, but the dial 12 or the scales 13 the color changes to indicate that the first speed value 10 from the combustion engine 2 or the second speed value 11 from the electric motor 3 is issued.

It may be, for example, that the common speed indicator element 23 is present when the pointer is illuminated blue, and that the first speed indicator element 8th is present when the pointer is illuminated red, and that the second speed indicator element 9 is present when the pointer is illuminated green.

Present is the dial 12 at least partially in the first color 15 illuminated, whereby it can be seen that by the common speed indicator element 23 the first speed value 10 of the internal combustion engine 2 is issued.

7 shows a further embodiment of the tachometer 4 analogous to 6 , The tachometer 4 also has a third speed indicator 24 and a fourth speed indicator 25 on. The third speed indicator element 24 and the fourth speed indicator 25 can also be present as a pointer and thus in one piece. But it can also be that, for example, a color of the pointer or a background color of the tachometer 4 or the dial 12 is changed and thereby the third speed indicator element 24 or the fourth speed indicator 25 is present. For example, the color may be changed such that only the third speed indicator element is indicated by the pointer 24 is present and thus only a maximum speed 26 of the internal combustion engine 2 is output or the pointer can be illuminated such that only the fourth speed indicator element 25 is present and thus only a maximum speed 27 of the electric motor 3 through the tachometer 4 is issued. Depending on the pointer color thus decides whether the third speed indicator element 24 or the fourth speed indicator 25 each alone or on a combination of the third speed indicator element 24 and the fourth speed indicator element 25 is present and thus a maximum speed of internal combustion engine 2 and electric motor 3 displayed together.

8th shows a further embodiment of the tachometer 4 analogous to 7 , According to this embodiment, the third speed indicator is 24 and / or the fourth speed indicator element 25 formed as an illuminated Strichaneinanderreihung. This is indicated by respective maximum speed indicator bars 28 output, which value is the maximum speed 26 and / or the maximum speed 27 Has. The maximum speed display screeds 28 are fan-shaped according to the embodiment in the form of a pitch circle and of the scale 13 partially formed. The maximum speed display bars 28 can be illuminated in different colors and as well as the third speed indicator element 24 as well as additionally or alternatively as a fourth speed indicator element 25 available.

Additionally or alternatively, by the fourth speed indicator element 25 are output, which maximum possible power requirement for the electric motor 3 possible before the internal combustion engine 2 is switched on. Thus, it can therefore be output up to which power requirement the hybrid vehicle 1 only electrically operated. The driver 7 therefore always has in mind how much torque or power he has the electric motor 3 can ask before it comes out of pure electric driving and the internal combustion engine 2 is started. In particular, this is advantageous for purely electric starting and purely electrical holding the current speed. By displaying the maximum possible power requirement of the electric motor 3 can the driver 7 determine when he wants to leave electric driving and when he wants to stay in pure electric driving. This power limit depends among other things on the state of charge of the battery of the electric motor 3 and is therefore dynamic. So the pointer can according to 7 or the locally illuminated scale or the maximum speed indicator bars 28 be adapted to the state of charge.

According to 6 to 8th can, especially if the internal combustion engine 2 is inactive and the electric motor 3 is active, but the hybrid vehicle 1 not from the electric motor 3 is driven by the second speed indicator element 9 on the scale 13 a predetermined value, for example 700 rpm are displayed or the second speed indicator element 9 or the common speed indicator element 23 will only point to a label on the dial such as "Ready". This always outputs information about which machine is currently active.

Furthermore, the scale 13 be labeled "Off". Shows the common speed indicator 23 For example, on "Off", both are the internal combustion engine 2 as well as the electric motor 3 inactive.

There may also be an additional scale area of the scale 13 be determined, the intensity of a current recuperation of the hybrid vehicle 1 or a charging current of the hybrid vehicle 1 indicates. The additional scale range can be labeled, for example, with "charge". The position of the second speed indicator element 9 or the common speed indicator element 23 in the additional scale range is particularly dependent on the negative speed of the electric motor 3 ,

LIST OF REFERENCE NUMBERS

1

hybrid vehicle

2

internal combustion engine

3

electric motor

4

Rev counter

5

front area

6

cockpit area

7

driver

8th

first speed indicator element

9

second speed indicator element

10

first speed value

11

second speed value

12

dial

13

Skale

14

Focus

15

first color

16

second color

17

Direction arrow

18

first scale

19

second scale

20

Gear recommendation

21

Gear recommendation display element

22

section

23

common speed indicator element

24

third speed indicator element

25

fourth speed indicator element

26

maximum speed of the internal combustion engine

27

maximum speed of the electric motor

28

Maximum speed display strokes

Claims (10)

Method for operating a tachometer (4) of a hybrid vehicle (1), in which a first speed value (10) of an internal combustion engine (2) of the hybrid vehicle (1) with a first speed indicator element (8) of the tachometer (4) on a dial (12) the tachometer (4) is output and a second rotational speed value (11) of an electric motor (3) of the hybrid vehicle (1) with a second speed indicator element (9) of the tachometer (4) is output, characterized in that the second rotational speed value (11) the second speed display element (9) on the same dial (12) is output. Method according to Claim 1 , Characterized in that the dial (12) while outputting the first rotational speed value (10) with the first speed indicator element (8) in a first color (15) is illuminated and the dial (12) while outputting the second rotational speed value (11) with the second speed indicator element (9) in one of the first Color (15) different second color (16) is illuminated. Method according to Claim 1 or 2 , characterized in that a maximum speed (26) of the internal combustion engine (2) with a third speed indicator (24) of the tachometer and / or a maximum speed (27) of the electric motor (3) with a fourth speed indicator element (25) of the tachometer (4 ) is output. Method according to one of the preceding claims, characterized in that the first speed value (10) with the first speed indicator element (8) on a scale (13) on the dial (12) is output and the second speed value (11) on the same scale (13 ) is output on the dial (12). Method according to one of Claims 1 to 3 characterized in that the first speed value (10) is output with the first speed indicator (8) on a first scale (18) on the dial (12) and the second speed value (11) on one different from the first scale (18) second scale (19) on the dial (12) is output. Method according to one of the preceding claims, characterized in that a current driving state of the hybrid vehicle (1) is detected and depending on the detected driving state, a gearshift recommendation (20) for a manual transmission of the hybrid vehicle (1) from the tachometer (1) is displayed. A tachometer (4) for a hybrid vehicle (1) comprising a first speed indicator (8), a second speed indicator (9) and a dial (12), the first speed indicator (8) being located on the dial (12) and thereto is set up to output a first speed value (10) of an internal combustion engine (2) of the hybrid vehicle (1) on the dial (12), characterized in that the second speed indicator element (2) on the same dial (12) is arranged and is set up a second To output speed value (11) of an electric motor (3) of the hybrid vehicle (1) on the dial (12). Tachometer (4) after Claim 7 , characterized in that the first speed indicator element (8) and the second speed indicator element (9) are designed as a common speed indicator element (23). Tachometer (4) after Claim 7 , characterized in that the first speed display element (8) and the second speed display element (9) are formed differently from each other. Tachometer (4) after one of Claims 7 to 9 , characterized in that the first speed indicator element (8) and / or the second speed indicator element (9) is designed as a pointer.

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