DE102018009467A1 - System and method for operating a vehicle - Google Patents

Abstract

The invention relates to a method for operating a vehicle (100) comprising a motor (231) and an automatic transmission (251), the method comprising the steps of: - automatically reducing (s450) a maximum permissible speed limit of the motor (231 If it is judged that an upshift of the automatic transmission (251) is not suitable for the vehicle (100) in a current or future downhill. The invention also relates to a computer program product, the program code (P) for a computer (200; 210 500) for implementing a method according to the invention. The invention also relates to a system for operating a vehicle (100). The invention also relates to a power train comprising a motor (231), an automatic transmission (251) and the system. The invention also relates to a motor vehicle (100) equipped with the drive train.

Description

TECHNICAL AREA

The present invention relates to a method for operating a vehicle. In particular, the present invention relates to controlling the travel of a vehicle. The invention also relates to a computer program product comprising program code for a computer for implementing a method according to the invention. It also relates to a drive train of a vehicle. It also relates to a system for operating a vehicle and a vehicle equipped with the system.

GENERAL PRIOR ART

When traveling a vehicle that has a relatively high torque uphill torque, it is not always possible to upshift by one gear, as this would cause the engine to stall. This is especially true in the case where a heavy duty truck, such as a truck, is on a steep roadway, e.g. in a mine, drives.

Not all heavy truck drivers have a good understanding of how engine operation is related to fuel economy, vehicle noise emissions, and vehicle vibration. With regard to heavy goods vehicles, fuel economy is of course an important and interesting topic, not least for hauliers. It is desirable to use these vehicles as inexpensively as possible while providing a good working environment for their drivers.

The EP 2236862 describes a method for preventing a vehicle from being upshifted by one gear step if it is determined that a next gear step would be inappropriate.

BRIEF SUMMARY OF THE INVENTION

An object of the present invention is to propose a novel and advantageous method for operating a vehicle.

Another object of the invention is to propose a novel and advantageous system and a novel and advantageous computer program for operating a vehicle.

Another object of the present invention is to propose a novel and advantageous method that provides more convenient and fuel-efficient operation of a vehicle.

Another object of the invention is to propose a novel and advantageous system and a novel and advantageous computer program which provides a more comfortable and fuel-efficient operation of a vehicle.

Yet another object of the invention is to propose a method, a system and a computer program that achieve automated and user-friendly operation of a vehicle.

Yet another object of the invention is to propose an alternative method, system, and program for convenient and fuel efficient operation of a vehicle.

Some of these objects are achieved by a method according to claim 1. Other tasks are accomplished by a system as shown here. Advantageous embodiments are shown in the dependent claims. In essence, the same advantages of the method steps of the proposed method apply to the corresponding means of the proposed system.

• - automatischen Verringern einer maximal zulässigen Drehzahlgrenze des Motors, falls eingeschätzt wird, dass ein Hochschalten des automatischen Getriebes bei einem aktuellen oder zukünftigen Bergaufgefälle für das Fahrzeug nicht geeignet ist.

According to one aspect of the invention, there is provided a method of operating a vehicle including a motor and an automatic transmission, the method comprising the step of:

• - Automatically reducing a maximum allowable speed limit of the engine, if it is estimated that an upshift of the automatic transmission is not suitable for a current or future uphill for the vehicle.

• - automatischen Verringern einer maximal zulässigen Drehzahlgrenze des Motors, falls eingeschätzt/ bestimmt/ berechnet/ modelliert/ simuliert wird, dass ein Hochschalten des automatischen Getriebes bei einem aktuellen oder zukünftigen Bergaufgefälle für das Fahrzeug nicht geeignet ist.

According to one aspect of the invention, there is provided a method of operating a vehicle including a motor and an automatic transmission, the method comprising the step of:

• automatically reducing a maximum allowable speed limit of the engine if it is estimated / determined / calculated / modeled / simulated that upshift of the automatic transmission at a current or future uphill slope is not suitable for the vehicle.

Advantageously, the proposed method can prevent a driver of the vehicle from unfavorably operating the vehicle. This may provide a cost effective, automatic and user friendly method of controlling the operation of the engine, if desired. A positive result of providing a limited maximum engine speed is that engine noise can be reduced. Another positive result is that the engine wear is reduced over time. As a result, improved fuel economy due to lower pump and friction losses of the engine is achieved.

The maximum allowable engine speed limit may be a threshold that engine speed may not exceed. If an upshift is not possible at a current or future uphill slope, the vehicle would continue in the lower gear, thereby increasing engine speed as the vehicle accelerates. However, by reducing this maximum allowable engine speed limit (or threshold) in a situation where upshifting at a current or future uphill slope is not (or is not) considered appropriate / acceptable, the engine is prevented from taking longer with such a relatively high speed (ie, a speed close to or equal to the originally set maximum speed limit) runs.

• - Bestimmen eines Gefälles eines aktuellen Geländes des Fahrzeugs;
• - Bestimmen einer Beschleunigungsfähigkeit des Fahrzeugs in einer aktuellen Gangstufe des Fahrzeuggetriebes; und
• - Bestimmen einer Beschleunigungsfähigkeit des Fahrzeugs in einer Gangstufe, die höher als die aktuelle Gangstufe des Fahrzeuggetriebes ist.

According to one embodiment, the method may include steps to estimate that an upshift of the automatic transmission at a current or future uphill slope is not suitable for the vehicle. For example, the method may further comprise the steps of:

• Determining a slope of a current terrain of the vehicle;
• Determining an acceleration capability of the vehicle in a current gear stage of the vehicle transmission; and
• Determining an acceleration capability of the vehicle in a gear stage which is higher than the current gear stage of the vehicle transmission.

• - Bestimmen eines Gefälles eines zukünftigen Geländes des Fahrzeugs;
• - Bestimmen einer Beschleunigungsfähigkeit des Fahrzeugs in einer aktuellen Gangstufe des Fahrzeuggetriebes; und
• - Bestimmen einer Beschleunigungsfähigkeit des Fahrzeugs in einer Gangstufe, die höher als die aktuelle Gangstufe des Fahrzeuggetriebes ist.

The method may include the steps of:

• Determining a slope of a future terrain of the vehicle;
• Determining an acceleration capability of the vehicle in a current gear stage of the vehicle transmission; and
• Determining an acceleration capability of the vehicle in a gear stage which is higher than the current gear stage of the vehicle transmission.

• - Bestimmen, ob ein Hochschalten auf die höhere Gangstufe auf der Grundlage des bestimmten Gefälles, der Beschleunigungsfähigkeit des Fahrzeugs in einer aktuellen Gangstufe und der Beschleunigungsfähigkeit des Fahrzeugs in der Gangstufe, die höher als die aktuelle Gangstufe ist, annehmbar ist; und
• - falls es nicht annehmbar ist, Begrenzen einer Fahrzeugmotordrehzahl unter Berücksichtigung mindestens einer der Betriebseigenschaften in der Form von Kraftstoffverbrauch, Fahrzeugschwingungen und Fahrzeuggeräuschemissionen.

For example, the method may further comprise the steps of:

• Determining whether an upshift to the higher gear ratio is acceptable based on the determined grade, the acceleration capability of the vehicle in a current gear ratio, and the acceleration capability of the vehicle in the gear ratio higher than the current gear ratio; and
• if unacceptable, limiting a vehicle engine speed taking into account at least one of the operating characteristics in the form of fuel consumption, vehicle vibration and vehicle noise emissions.

The step of limiting vehicle engine speed may refer here to the step of (automatically) reducing a maximum allowable engine speed limit. The functions "limiting the vehicle engine speed" and "reducing a maximum permissible speed limit of the engine" may refer here to similar or the same functions.

The step of determining an acceleration capability of the vehicle in a gear stage higher than the current gear stage of the vehicle transmission may be carried out by means of simulations. Thereby, suitable simulation models may be used to determine the acceleration capability of the vehicle with respect to a number of different gear ratios that are higher than the current gear ratio. According to one embodiment, the acceleration capability of the vehicle in a gear step higher than the current gear step may be determined by off-board calculations, i. by hardware / software that is not an integral part of the control arrangements shown here. This can be done using a look up table for given current operating conditions of the vehicle.

If it is determined that upshifting to the higher gear ratio is unacceptable, engine speed limiting may be performed to reduce engine fuel consumption during future engine operation in which the current gear ratio is engaged. The limitation of a maximum engine speed may be determined such that more desirable fuel consumption for a current gear ratio is achieved.

If it is determined that an upshift to the higher gear ratio is unacceptable, the engine speed limiting may be performed such that vehicle vibration is reduced during future engine operation when the current gear ratio is engaged. The limitation of a maximum allowable engine speed can be determined such that less unfavorable vehicle vibrations for a current gear ratio be achieved. Thereby, the limitation of the maximum engine speed based on predetermined data including information about vehicle vibrations as a function of engine speed may be set to a predetermined limit value. As a result, an increased comfort for the driver of the vehicle is advantageously achieved.

If it is determined that upshifting to the higher gear ratio is unacceptable, the engine speed limiting may be performed so as to reduce vehicle noise emissions during future engine operation in which the current gear ratio is engaged. The limitation of a maximum allowable engine speed may be determined such that less adverse vehicle noise emissions are achieved for a current gear ratio. Thereby, the limitation of the maximum allowable engine speed based on predetermined data including information about vehicle noise emissions as a function of engine speed may be set to a predetermined limit value. This advantageously achieves an improved working environment for the driver of the vehicle.

The limitation of the maximum engine speed may be set to a predetermined limit value, e.g. taking into account which gear is the current gear. Thus, in one example, the maximum engine speed limit may be set to a predetermined maximum engine speed based on which gear is the current gear. In one example, the maximum engine speed limit may be determined and tuned continuously.

• - Bestimmen der Beschleunigungsfähigkeit des Fahrzeugs in einer Anzahl von Gangstufen, die höher als die aktuelle Gangstufe des Fahrzeuggetriebes sind, anhand von Simulationen; und
• - für jede der Gangstufen der Anzahl von Gangstufen, Bestimmen, ob ein Hochschalten annehmbar ist.

The method may include the steps of:

• - Determining the acceleration capability of the vehicle in a number of gear stages, which are higher than the current gear stage of the vehicle transmission, based on simulations; and
• for each of the gear ratios of the number of gear ratios, determining if an upshift is acceptable.

If one of the simulations performed provides an acceptable gearshift, a most preferred gearshift can be performed. If none of the simulations performed results in an acceptable gearshift, the engine speed limit may be executed for a current gear ratio. This achieves a reliable, robust and accurate method according to the proposed method.

For example, if a current gear stage is a second gear stage of the transmission, simulations regarding the acceleration capability of the vehicle for a third, fourth and fifth gear stage may be performed. The results of the simulations are evaluated, and it can thereby be determined whether a gear step change process should be performed or whether a limit of the vehicle engine speed should be activated, wherein the current gear stage of the transmission remains engaged.

• - Bestimmen, dass das Hochschalten auf die höhere Gangstufe nicht annehmbar ist, falls das bestimmte Gefälle eine Bergaufbewegung des Fahrzeug bereitstellt, die Beschleunigungsfähigkeit des Fahrzeugs der aktuellen Gangstufe gegeben ist und die Beschleunigungsfähigkeit des Fahrzeugs in der Gangstufe, die höher als die aktuelle Gangstufe ist, als unzureichend angesehen wird.

The method may include the step of:

• Determining that the upshift to the higher gear is unacceptable if the particular downhill provides the vehicle uphill, the current vehicle acceleration capability is given, and the vehicle is capable of accelerating in the gear that is higher than the current gear; is considered insufficient.

This provides a robust and accurate method of operating a vehicle.

• - Begrenzen der Fahrzeugmotordrehzahl, um den Kraftstoffverbrauch zu reduzieren und/oder die Fahrzeugschwingungen zu reduzieren und/oder die Fahrzeuggeräuschemissionen zu reduzieren.

The method may include the step of:

• Limit the vehicle engine speed to reduce fuel consumption and / or reduce vehicle vibrations and / or reduce vehicle noise emissions.

• - automatischen Verringern einer maximal zulässigen Drehzahlgrenze des Motors, um den Kraftstoffverbrauch zu reduzieren und/oder die Fahrzeugschwingungen zu reduzieren und/oder die Fahrzeuggeräuschemissionen zu reduzieren.

The method may include the step of:

• - Automatically reducing a maximum allowable speed limit of the engine to reduce fuel consumption and / or reduce the vehicle vibrations and / or to reduce the vehicle noise emissions.

This provides a flexible and versatile method of operating a vehicle. In one example, controlling the engine is performed based on a maximum allowable engine speed determined to reduce at least one of the operating characteristics in the form of fuel consumption, vehicle vibration, and vehicle noise emissions.

• - ununterbrochenen Bewerten eines Ergebnisses der Motordrehzahlbegrenzung des Fahrzeugs; und
• - Bestimmen, ob die gewählte Begrenzung der Fahrzeugmotordrehzahl zu behalten oder zu ändern ist.

The method may include the steps of:

• - continuously evaluating a result of the engine speed limit of the vehicle; and
• Determining whether to keep or change the selected vehicle engine speed limit.

Thereby, it may be determined whether the engine speed limiting process achieves desired results in reducing one of the operating characteristics. According to one example, a level of the maximum allowable engine speed may be adjusted based on the evaluation result. According to one example, a level of the maximum allowable engine speed may be reduced based on the evaluation result. According to one example, a level of its maximum allowable engine speed may be increased based on the evaluation result. This achieves an automated, accurate and reliable method of operating the vehicle.

• - Mittel, die eingerichtet sind, um eine maximal zulässige Drehzahlgrenze des Motors automatisch zu verringern, falls eingeschätzt wird, dass ein Hochschalten des automatischen Getriebes bei einem aktuellen oder zukünftigen Bergaufgefälle für das Fahrzeug nicht geeignet ist.

According to one aspect of the invention, there is provided a system for operating a vehicle including a motor and an automatic transmission, the system comprising:

• Means arranged to automatically reduce a maximum allowable speed limit of the engine if it is judged that upshift of the automatic transmission at a current or future uphill slope is not suitable for the vehicle.

According to one embodiment, there is provided a system for operating a vehicle, the system including at least one electronic control arrangement, such as an ECU (Electronic Control Unit), configured to automatically reduce a maximum allowable speed limit of the engine if it is judged that an upshift of the automatic transmission at a current or future uphill slope is not suitable for the vehicle.

• - Mittel, die eingerichtet sind, um eine maximal zulässige Drehzahlgrenze des Motors automatisch zu verringern, falls eingeschätzt/ bestimmt/ berechnet/ modelliert/ simuliert wird, dass ein Hochschalten des automatischen Getriebes bei einem aktuellen oder zukünftigen Bergaufgefälle für das Fahrzeug nicht geeignet ist.

According to one aspect of the invention, there is provided a system for operating a vehicle including a motor and an automatic transmission, the system comprising:

• Means arranged to automatically reduce a maximum allowable engine speed limit if it is estimated / determined / calculated / modeled / simulated that upshift of the automatic transmission at a current or future uphill slope is not suitable for the vehicle.

• - Mittel, die eingerichtet sind, um eine maximal zulässige Drehzahlgrenze des Motors automatisch zu verringern, falls eingeschätzt/ bestimmt/ berechnet/ modelliert/ simuliert wird, dass ein Hochschalten des automatischen Getriebes bei einem aktuellen oder zukünftigen Bergaufgefälle für das Fahrzeug nicht annehmbar und/oder nicht geeignet ist.

According to one aspect of the invention, there is provided a system for operating a vehicle including a motor and an automatic transmission, the system comprising:

• Means arranged to automatically reduce a maximum allowable engine speed limit, if estimated / determined / calculated / modeled / simulated, upshift of the automatic transmission at a current or future uphill slope for the vehicle is unacceptable and / or not suitable.

• - Mittel, die eingerichtet sind, um ein Gefälle eines aktuellen Geländes des Fahrzeugs zu bestimmen;
• - Mittel, die eingerichtet sind, um eine Beschleunigungsfähigkeit des Fahrzeugs in einer aktuellen Gangstufe des Fahrzeuggetriebes zu bestimmen; und
• - Mittel, die eingerichtet sind, um eine Beschleunigungsfähigkeit des Fahrzeugs in einer Gangstufe, die höher als die aktuelle Gangstufe des Fahrzeuggetriebes ist, zu bestimmen.

The system may include:

• - means arranged to determine a gradient of a current terrain of the vehicle;
• Means adapted to determine an acceleration capability of the vehicle in a current gear stage of the vehicle transmission; and
• - Means, which are adapted to determine an acceleration capability of the vehicle in a gear stage, which is higher than the current gear stage of the vehicle transmission.

• - Mittel, die eingerichtet sind, um zu bestimmen, ob ein Hochschalten auf die höhere Gangstufe annehmbar ist, auf der Grundlage des bestimmten Gefälles, der Beschleunigungsfähigkeit des Fahrzeugs in einer aktuellen Gangstufe und der Beschleunigungsfähigkeit des Fahrzeugs in der Gangstufe, die höher als die aktuelle Gangstufe ist; und
• - Mittel, die eingerichtet sind, falls das Hochschalten nicht annehmbar ist, um eine Fahrzeugmotordrehzahl unter Berücksichtigung mindestens einer der Betriebseigenschaften in der Form von Kraftstoffverbrauch, Fahrzeugschwingungen und Fahrzeuggeräuschemissionen zu begrenzen.

The system may include:

• Means arranged to determine whether an upshift to the higher gear level is acceptable, based on the determined grade, the acceleration capability of the vehicle in a current gear ratio, and the acceleration capability of the vehicle in the gear ratio higher than the current one Gear ratio is; and
• Means, which are established if the upshift is unacceptable to limit a vehicle engine speed taking into account at least one of the operating characteristics in the form of fuel consumption, vehicle vibration and vehicle noise emissions.

• - Mittel, die eingerichtet sind, um die Beschleunigungsfähigkeit des Fahrzeugs in einer Anzahl von Gangstufen, die höher als die aktuelle Gangstufe des Fahrzeuggetriebes sind, anhand von Simulationen zu bestimmen; und
• - Mittel, die eingerichtet sind, um zu bestimmen, ob ein Hochschalten für jede der Gangstufen der Anzahl von Gangstufen annehmbar ist. Die Beschleunigungsfähigkeit des Fahrzeugs in der höheren Gangstufe kann von einem Zeitraum abhängig sein, der mit der Zeit zusammenhängt, die zum Ausführen einer Gangänderung benötigt wird. Es ist günstig, eine Gangschaltung auszuführen, die zu einer aktuellen Motordrehzahl führt, bei der ein maximales Motordrehmoment bereitgestellt werden kann.

The system may include:

• - Means, which are adapted to determine the acceleration capability of the vehicle in a number of gear stages, which are higher than the current gear stage of the vehicle transmission, based on simulations; and
• Means arranged to determine whether an upshift is acceptable for each of the gear ratios of the number of gear stages. The acceleration capability of the vehicle in the higher gear may depend on a period of time associated with the time required to make a gear change is needed. It is beneficial to make a gear shift that results in a current engine speed at which maximum engine torque can be provided.

• - Mittel, die eingerichtet sind, um zu bestimmen, dass das Hochschalten auf die höhere Gangstufe nicht annehmbar ist, falls das bestimmte Gefälle eine Bergaufbewegung des Fahrzeugs bereitstellt, die Beschleunigungsfähigkeit des Fahrzeugs in der aktuellen Gangstufe gegeben ist und die Beschleunigungsfähigkeit des Fahrzeugs in der Gangstufe, die höher als die aktuelle Gangstufe ist, als nicht ausreichend angesehen wird.

The system may include:

• Means arranged to determine that the upshift to the higher gear is unacceptable if the particular downhill provides the vehicle uphill, the acceleration capability of the vehicle in the current gear and the vehicle's acceleration capability in the gear , which is higher than the current gear, is considered insufficient.

• - Mittel, die eingerichtet sind, um die Fahrzeugmotordrehzahl zu begrenzen, um den Kraftstoffverbrauch zu reduzieren und/oder die Fahrzeugschwingungen zu reduzieren und/oder die Fahrzeuggeräuschemissionen zu reduzieren.

The system may include:

• Means arranged to limit vehicle engine speed to reduce fuel consumption and / or reduce vehicle vibration and / or reduce vehicle noise emissions.

• - Mittel, die eingerichtet sind, um ein Ergebnis der Begrenzung der Fahrzeugmotordrehzahl ununterbrochen zu bewerten; und
• - Mittel, die eingerichtet sind, um zu bestimmen, ob die gewählte Begrenzung der Fahrzeugmotordrehzahl einzuhalten oder zu ändern ist.

The system may include:

• Means arranged to continuously evaluate a result of the limitation of the vehicle engine speed; and
• - means arranged to determine whether to maintain or change the selected vehicle engine speed limit.

According to one aspect of the invention, there is provided a vehicle comprising a system as provided herein. According to one aspect of the invention, there is provided a vehicle including a powertrain including an automatic transmission and a system as provided herein. The vehicle may be one of a truck, a bus or a passenger car.

According to one aspect of the invention, there is provided a powertrain for a vehicle, the powertrain including a motor, an automatic transmission, and a system as illustrated herein.

In accordance with one aspect of the invention, a vehicle is provided that includes a powertrain as illustrated herein.

According to one aspect of the invention, there is provided a computer program product comprising instructions that, when the program is executed by a computer, cause the computer to perform one of the steps of the method presented herein.

In accordance with one aspect of the invention, a computer-readable storage medium is provided that includes instructions that, when executed by a computer, cause the computer to perform one of the steps of the method presented herein.

According to one aspect of the invention, there is provided a computer program product comprising instructions that, when the program is executed by an electronic control device, cause the electronic control device to perform one of the steps of the method presented herein.

In accordance with one aspect of the invention, a computer-readable storage medium is provided that includes instructions that, when executed by an electronic control device, cause the electronic control device to perform one of the steps of the method illustrated herein.

According to one aspect of the invention, there is provided a computer program for operating a vehicle including a motor and an automatic transmission, the computer program including program code for causing an electronic control device or a computer connected to the electronic control device to operate. performs one of the method steps shown here when it runs on the electronic control device or the computer.

According to one aspect of the invention, there is provided a computer program for operating a vehicle including a motor and an automatic transmission, the computer program comprising program code stored on a computer-readable medium to cause an electronic control device or computer to operate. which is connected to the electronic control device executes one of the method steps shown here.

According to one aspect of the invention, there is provided a computer program for operating a vehicle including a motor and an automatic transmission, the computer program comprising program code stored on a computer-readable medium to cause an electronic control device or computer to operate. which is connected to the electronic control device performs one of the method steps shown here, when it runs on the electronic control device or the computer.

According to one aspect of the invention, a computer program product is provided which Program code stored on a computer readable medium to perform any of the method steps illustrated herein when the computer program runs on an electronic control device or a computer connected to the electronic control device.

According to one aspect of the invention, there is provided a computer program product that includes program code that is stored non-transiently on a computer readable medium to perform one of the method steps illustrated herein when the computer program is on an electronic control device or a computer connected to the electronic control device , expires.

Other objects, advantages and novel features of the present invention will become apparent to those skilled in the art from the following details and also by practicing the invention. Although the invention will be described below, it should be understood that it is not limited to the specific details described. Those skilled in the art having access to the present teachings will recognize other applications, variations, and inclusions in other fields that are within the scope of the invention.

list of figures

• 1 schematisch ein Fahrzeug gemäß einer Ausführungsform der Erfindung;
• 2 schematisch ein System gemäß einer Ausführungsform der Erfindung;
• 3a schematisch ein Diagramm gemäß einer Ausführungsform der Erfindung;
• 3b schematisch ein Diagramm gemäß einer Ausführungsform der Erfindung;
• 3c schematisch ein Diagramm gemäß einer Ausführungsform der Erfindung;
• 4a ein schematisches Ablaufschema eines Verfahrens gemäß einer Ausführungsform der Erfindung;
• 4b ein schematisches Ablaufschema eines Verfahrens gemäß einer Ausführungsform der Erfindung; und
• 5 schematisch einen Computer gemäß einer Ausführungsform der Erfindung.

For a better understanding of the embodiments of the present invention and their further objects and advantages, the detailed description set forth below is to be read in conjunction with the accompanying drawings, in which the same reference numerals designate similar elements in the various diagrams. Show it:

• 1 schematically a vehicle according to an embodiment of the invention;
• 2 schematically a system according to an embodiment of the invention;
• 3a schematically a diagram according to an embodiment of the invention;
• 3b schematically a diagram according to an embodiment of the invention;
• 3c schematically a diagram according to an embodiment of the invention;
• 4a a schematic flow diagram of a method according to an embodiment of the invention;
• 4b a schematic flow diagram of a method according to an embodiment of the invention; and
• 5 schematically a computer according to an embodiment of the invention.

DETAILED DESCRIPTION

1 forms a side view of a vehicle 100 from. The exemplary vehicle 100 includes a tractor 110 and a trailer 112 , The vehicle 100 can be a heavy vehicle, eg a truck or a bus. Alternatively, it can be a car.

The method and system are applicable to various vehicles, such as a mining machine, a tractor, a dump truck, a wheel loader, a platform that includes an industrial robot, a forest machine, an earthmoving machine, a construction vehicle, a road planner, an ambulance, or a crawler vehicle ,

The method and system are applicable in driving situations in which the vehicle is traveling in a terrain having a positive inclination angle α. The inclination angle α can be for example 1, 5, 10 or 15 degrees. A positive angle of inclination here means that the vehicle is traveling on an uphill incline with respect to 1 is shown. A speed V of the vehicle 100 is given for clarity. Another term for the angle of inclination α is here the slope of the terrain.

As used herein, the term "vehicle acceleration capability" may refer to a maximum ability of the vehicle to recover a deceleration rate having boundary conditions of the provided transmission, engine efficiency, travel resistance and vehicle mass for a current vehicle pitch angle.

As used herein, the term "connection" refers to a communication connection that is a physical connection, such as an optoelectronic communication line, or a non-physical connection, such as a wireless connection, e.g. a radio link or a radio frequency link, can act.

The term "system" is defined herein as a system comprising only one electronic control arrangement or a number of connected electronic control arrangements according to one embodiment. The one electronic control arrangement or the number of connected electronic control arrangements may be arranged to carry out the steps according to the method presented here.

2 forms a schematic system 289 of the vehicle 100 from. The system 289 is in the tractor 110 and includes an engine 231 with an output shaft 235 that with a clutch assembly 241 connected is.

The motor 231 may be any suitable engine, such as an internal combustion engine, which includes a so-called gasoline engine or diesel engine. The motor 231 can be an electric motor. The motor 231 may be any suitable cylinder configuration. The motor 231 may be any limited power range (eg, RPM) internal combustion engine / electric motor / propulsion assembly.

The coupling arrangement 241 may be an automatic clutch arrangement. This coupling arrangement 241 is also with a wave 245 connected, which is a drive shaft, to a transmission 251 goes.

The coupling arrangement 241 For example, one of the group of clutch assemblies may include a dry clutch, a wet clutch, an electric clutch, and a hydraulic converter. According to one embodiment, the transmission of the vehicle 100 not provided with a coupling arrangement.

The gear 251 is, according to one example, a hydraulic automatic transmission. The gear 251 is an automated manual transmission (AMT) according to one example.

The gear 251 For example, according to one example, a dual drive gear or other multiple gear transmission is controlled by a control arrangement.

The gear 251 may be configured to include any suitable number of gear ratios, eg 5, 12 or 16. The gear 251 has an output shaft 255 to apply torque to at least a pair of drive wheels that have a first drive wheel 260a and a second drive wheel 260b include, via an auxiliary transmission 265 and one wave each 265a and 265b transferred to.

The motor 231 is set up to generate a torque that is on the drive wheels 260a and 260b can be transferred to the vehicle 100 getting around. The torque is thereby transmitted via a transmission arrangement of the vehicle 100 which the wave 235 , the coupling arrangement 241 , the wave 245 , The gear 251 , the wave 255 , the auxiliary transmission 270 and the waves 265a and 265b includes, transfer.

A first control arrangement 200 is about a connection L231 for communication with the engine 231 set up and is suitable to the operation of the engine 231 according to stored control routines. The first control arrangement 200 is set up to the engine 231 based on control signals 5231 to control, which include control commands for the engine operation. Such a command may relate to a maximum allowable engine speed, which is a level of engine speed limit.

The first control arrangement 200 is about a connection L241 for communication with the clutch assembly 241 set up and is suitable for the operation of the clutch assembly 241 according to the actions of the vehicle driver and stored control routines. This will make appropriate gear shifts during operation of the vehicle 100 executed.

The first control arrangement 200 is about a connection L251 for communication with the transmission 251 set up and is suitable to the operation of the transmission 251 according to the actions of the vehicle driver.

An engine speed sensor 220 is set to a current engine speed Neng of the engine 231 to determine continuously. The engine speed sensor 220 can on the shaft 235 to be provided. The engine speed sensor 220 is suitable for continuous or intermittent signals S220 that contain information about the determined current engine speed Neng over the connection L220 to the first control arrangement 200 to send. The first control arrangement 200 is suitable to continuously receive the signals S220 to receive and store the information in a memory therein. The engine speed sensor 220 may alternatively be in any other suitable position for determining an actual engine speed Neng of the engine 231 located on a flywheel (not shown) of the engine 231 ,

An inclination angle sensor 230 is set up to a tilt angle α of the terrain of the vehicle 100 to determine. The tilt angle sensor 230 is set up to a current tilt angle α of the terrain of the vehicle 100 to determine. The tilt angle sensor 230 can be set to an inclination angle α of the terrain of the vehicle 100 with respect to a terrain ahead over which the vehicle 100 is determined to determine. The tilt angle sensor 230 may include a gyroscopic device to determine the inclination angle α of the terrain over which the vehicle is traveling 100 is determined to determine. The tilt angle sensor 230 can in the vehicle 100 be arranged in any suitable position. The tilt angle sensor 230 is about a connection L230 for communication with the first control arrangement 200 set up. The tilt angle sensor 230 is set up to receive signals S230 which the information about a Inclination angle α of the current terrain and / or a terrain ahead, over which the moving vehicle 100 will drive over the connection L230 to the first control arrangement 200 to send.

An arrangement 240 for determining a slope is set to an inclination angle α of the terrain of the vehicle 100 to determine. The order 240 for determining a slope is set up to a current tilt angle α of the terrain of the vehicle 100 to determine. The order 240 for determining a slope may be arranged to an inclination angle α of the terrain of the vehicle 100 with respect to a terrain ahead over which the vehicle 100 is determined to determine. The order 240 For determining a grade, a GPS device may include the pitch angle α of the terrain over which the vehicle 100 is determined to determine. The order 240 To determine a grade, an electronic map may include the angle of inclination α of the terrain over which the vehicle 100 is determined to determine. The order 240 for determining a grade may be in the vehicle 100 be arranged in any suitable position. The order 240 for determining a gradient is via a connection L240 for communication with the first control arrangement 200 set up. The order 240 for determining a slope is set up to signals 5240 containing the information about an inclination angle α of the current terrain and / or a terrain ahead, over which the moving vehicle 100 is driven over the connection L240 to the first control arrangement 200 to send.

The proposed method and system presented here are applicable in situations where the vehicle 100 is moved on a hillside. The slope of the terrain of the vehicle must be positive, ie as with respect to 1 Are defined. The gradient may be, for example, 1, 3, 5, 10, 15 or 20 degrees.

A vehicle speed sensor 250 is set up to a current vehicle speed V of the vehicle 100 to determine. The vehicle speed sensor 250 can be in any suitable position of the vehicle 100 be set up, such as on one or more wheels 260a . 260b of the vehicle 100 , The vehicle speed sensor 250 is about a connection L250 for communication with the first control arrangement 200 set up. The vehicle speed sensor 250 is set up to a current speed V of the vehicle 100 to determine and to continuously or intermittently signals 5250 containing information about the detected speed V of the vehicle 100 include, over the connection L250 to the first control arrangement 200 to send.

Alternatively, the vehicle speed V by any other suitable in-vehicle means, such as a GPS unit. Alternatively, the vehicle speed V by any suitable external means, such as at least one vehicle speed sensor, located outside the vehicle, eg on a vehicle path in a mine. As a result, the external vehicle speed sensor is set up to transmit to the first control arrangement signals which include information about a current vehicle speed via a suitable connection 200 to send.

The first control arrangement 200 is set up to accelerate the vehicle A based on a number of vehicle speed values V to determine.

The first control arrangement 200 is arranged to determine an acceleration capability VAccAprev of the vehicle in a current gear stage of the vehicle transmission. In one example, this is done based on the determined vehicle acceleration A , According to one example, this is done based on a certain rate of change of engine speed.

The first control arrangement 200 is set to accelerate VAccAhigh of the vehicle in a gear that is higher than the current gear of the vehicle transmission 251 is to determine. This can be done by a number of simulations.

A second control arrangement 210 is about a connection L210 for communication with the first control arrangement 200 set up. It can with the first control arrangement 200 be detachably connected. It can be a control arrangement located outside the vehicle 100 located. It may be suitable for carrying out the steps according to the embodiments of the invention. It can be used to software on the first control arrangement 200 in particular software for applying the method. It may alternatively be used for communication with the first control arrangement 200 be set up via an internal network on board the vehicle. It may be suitable to perform functions similar to those of the first control arrangement 200 such as determining whether an upshift to a higher gear is acceptable, based on a certain slope α of a terrain of the vehicle 100 , the accelerability VAccAprev of the vehicle in a current gear and a Acceleration capability VAccAhigh of the vehicle in the gear ratio higher than the current gear ratio, and if unacceptable, limiting vehicle engine speed considering at least one of the operating characteristics in the form of fuel consumption, vehicle vibration, and vehicle noise emissions.

3a schematically illustrates a diagram, wherein a maximum engine torque is indicated as a function of the engine speed Neng. The engine torque is given in Newton meters [Nm] and the engine speed in revolutions per minute [RPM]. In this case, the engine torque refers to the torque at the first shaft 235 ,

It represents a maximum available engine torque for engine speed values ranging from a certain (not defined) engine speed value to a first engine speed value Neng1 rich, to a certain level tq1 continuously increases. Between the first engine speed value Neng1 and a second engine speed value Neng2 the maximum available torque is essentially at a certain level tq1 , The maximum available engine torque Tq for engine speed values obtained from a first engine speed value Neng1 up to a third engine speed value Neng2 rich, takes continuously to a certain level Tq2 from. The maximum available engine torque Tq for engine speed values, that of the third engine speed value Neng3 up to a fourth engine speed value Neng4 range, continuously decreases to a level of zero Nm.

• Neng1 = 1000 RPM; Neng2 = 1300 RPM; Neng3 = 1800 RPM;
• Neng4 = 2500 RPM;

• Tq1 = 3000 Nm; Tq2 = 2500 Nm

According to this example:

• Neng1 = 1000 RPM; Neng2 = 1300 RPM; Neng3 = 1800 RPM;
• Neng4 = 2500 RPM;

• Tq1 = 3000 Nm; Tq2 = 2500 Nm

Of course, other forms of engine torque curve are possible. The referring to 3a for example taken curve is a simplified version.

3b schematically illustrates a diagram in which a motor torque, that at the third shaft 255 is given as a function of time t during a gear shift process. The torque is given in Nm and the time t in seconds s.

Initially, there is a certain gear ratio in the transmission 251 inserted. At a first time t1 a gear shift process is initiated. Between the first time t1 and a second time t2 the engaged gear is disengaged. This is a ramp descent of the torque between the first time t1 and a second time t2 available. During a period of time through the second time t2 and a third time t3 is defined, a gear synchronization process in the transmission 251 executed. At the third time t3 a higher gear is engaged. This is a ramp increase of the torque Tq between the third time t3 and a fourth time t4 available.

The following 3c Can in conjunction with 3b be seen.

3c schematically illustrates a diagram relating to the results of the simulation of a gear shift process. The gear shifting process relates to a gear shift from a current gear to a higher gear. According to this example, the current gear is a second gear of the transmission 251 and the higher gear is a third gear of the transmission 251 , This indicates an engine speed Neng as a function of time t. The engine speed Neng is given in revolutions per minute RPM and the time t in seconds s.

It is schematically illustrated that the engine speed Neng increases during a phase of engine operation when a current gear stage at a time between the first time t1 and the second time t2 (during the ramp descent phase). After that, the engine speed Neng decreases until the third time t3 when the ramp-up phase is about to begin. Taking into account that the vehicle 100 is moved on a hill slope α, this leads to a reduction of the engine speed according to the present simulation.

It should be noted that the engine speed Neng continues to decrease during the ramp-up phase, and also after the fourth time t4 when the next higher gear is engaged in the transmission, the engine speed Neng continues to decrease. This determines that an upshift to the higher gear is unacceptable. As a result of this simulation, the vehicle engine speed Neng is limited and the simulated upshift is performed by the first control arrangement 200 not executed.

If the simulation had presented another result, such as the dashed line from the third time point t3 an, it may have been determined that there would be sufficient vehicle acceleration capability, and therefore, the upshift to the simulated gear ratio could be performed.

According to an exemplary embodiment, a plurality of similar simulations for various gear stages, which are higher than the current gear stage, are executed simultaneously and uninterrupted. Thereby, it may be determined whether to upshift to an appropriate gear step or to execute no gear shift while applying engine speed limitation according to the embodiments of the invention.

If the vehicle is traveling on an uphill slope, the engine speed Neng of the engine decreases 231 as a result of vehicle deceleration during a gear shift process. Further, when shifting to a gear that is higher than the current gear, the engine speed Neng is consequently reduced. These illustrated engine speed reductions are considered in the simulation models.

• - automatischen Verringern einer maximal zulässigen Drehzahlgrenze des Motors 231, falls eingeschätzt wird, dass ein Hochschalten des automatischen Getriebes 251 bei einem aktuellen oder zukünftigen Bergaufgefälle für das Fahrzeug 100 nicht geeignet ist.

4a schematically forms a flowchart of a method for operating a vehicle 100 that a motor 231 and an automatic transmission 251 includes, from. The method comprises a method step s401. The method step s401 comprises the step to:

• - automatically reducing a maximum permissible speed limit of the motor 231 if it is estimated that an upshift of the automatic transmission 251 at a current or future hillside for the vehicle 100 not suitable.

After the process step s401 the procedure is ended / returned.

4b schematically forms a flowchart of a method for operating a vehicle 100 that a motor 231 and an automatic transmission 251 includes, from.

The method comprises a method step s410 , The process step s410 includes the step of determining a grade α a current terrain of the vehicle 100 , This can be done in different ways. According to a first example, the current gradient α the current terrain of the vehicle based on the tilt angle sensor 230 measured. According to a second example, the current gradient α the current terrain of the vehicle 100 by means of the means 240 to determine a slope.

According to one example, it is determined whether the current grade α, at which the vehicle is currently positioned, for the slope of a certain distance in front of the vehicle 100 , such as 25, 50, 100 or 200 meters, is representative. If so, this can be taken into account advantageously when determining whether the maximum engine speed is to be limited. If the actual slope is representative of the slope α of the terrain of the distance in question, a more reliable and accurate determination will be made as to the engine speed limit step shown here.

According to one embodiment, the determined current grade α becomes the average slope of the terrain, starting with a current vehicle position, a certain distance ahead of the vehicle 100 , such as 50, 100 or 200 meters or more, determined.

After the process step s410 becomes a subsequent process step s420 executed.

The process step s420 includes the step of determining an acceleration capability VAccAprev the vehicle in a current gear stage of the vehicle transmission 251 , This can be done by means of the first control arrangement 200 be executed. The acceleration capability VAccAprev of the vehicle relative to the current gear ratio may be based on a current acceleration A of the vehicle 100 be determined. The acceleration capability VAccAprev The vehicle's current gear ratio may be determined based on a rate of change of the current engine speed. The greater the current acceleration A the greater the ability to accelerate VAccAprev of the vehicle in the current gear. Similarly, the greater the rate of change of the current engine speed, the greater the acceleration capability VAccAprev of the vehicle in the current gear.

After the process step s420 becomes a subsequent process step s430 executed.

The process step s430 includes the step of determining an acceleration capability VAccAhigh of the vehicle in a gear that is higher than the current gear of the vehicle transmission 251 is. This is based on the first control arrangement 200 executed. The gear stage that is higher than the current gear stage may be any suitable higher gear stage. For example, if the current gear is a first (lowest) gear, the higher gear can a second, third or fourth gear of the transmission 251 his.

According to one embodiment, the step of determining the acceleration capability is performed VAccAhigh of the vehicle in the gear, which is higher than the current gear of the vehicle transmission 251 is, by means of simulations.

According to one embodiment, the acceleration capability of the vehicle is in one number N of gear ratios higher than the current gear stage of the vehicle transmission 251 are determined by simulations. The specific acceleration capability of the vehicle of a number N of gear stages that are higher than the current gear stage can with VAccAhigh1 . VAccAhigh2 , ..., VAccAhighN be designated.

After the process step s430 becomes a subsequent process step s440 executed.

The process step s440 includes the step of determining whether an upshift to the higher gear is acceptable based on the determined grade α , the acceleration capability VAccAprev the vehicle in a current gear and the ability to accelerate VAccAhigh of the vehicle in the gear, which is higher than the current gear. This can be done by means of the first control arrangement 200 be executed.

If the acceleration capability of the vehicle in a number of gear ratios higher than the current gear ratio of the vehicle transmission 251 are, it can be determined, for each of the gears in number N to determine whether an upshift is acceptable. In the event that two or more of the simulations result in an upshift to the respective higher gear level being acceptable, the most appropriate one of the higher gear ratios is selected. As a result, an upshift to this most suitable gear ratio can be performed.

The process step s440 may comprise the step of determining that the upshift to the higher gear level is unacceptable if the determined downslope α is an uphill movement of the vehicle 100 provides the acceleration capability VAccAprev the vehicle is given in the current gear and the acceleration capability VAccAhigh of the vehicle in the gear, which is higher than the current gear, is considered insufficient. This can be done by means of the first control arrangement 200 be executed.

According to one embodiment, it is determined that the determined gradient α is an uphill movement of the vehicle 100 provides, if it exceeds a slope of 1 degree. According to one embodiment, it is determined that the determined gradient α is an uphill movement of the vehicle 100 provides, if it exceeds a slope of 3 degrees. According to one embodiment, it is determined that the particular grade α provides uphill movement of the vehicle if it exceeds a predetermined grade, such as zero (0), 2 or 5 degrees.

According to one embodiment, it is determined that the acceleration capability VAccAprev given the vehicle in the current gear, if they have a predetermined threshold VAccAprevTH exceeds. The predetermined threshold VAccAprevTH may be any suitable value, such as zero (0). The predetermined threshold VAccAprevTH may have been determined empirically. The predetermined threshold VAccAprevTH may be in a memory of the first control arrangement 200 be saved.

According to one embodiment, the acceleration capability becomes VAccAhigh the vehicle in the gear stage, which is higher than the current gear, is considered insufficient, if an appropriate operation of the vehicle after a gearshift has been made (eg according to the simulation results) is not probable.

After the process step s440 becomes a subsequent process step s450 executed.

The process step s450 if the upshift to the higher gear level is unacceptable, the step of limiting a vehicle engine speed includes at least one of the operating characteristics in the form of fuel consumption, vehicle vibration, and vehicle noise emissions. The process step s450 For example, if upshifting to the higher gear ratio is unacceptable, the step of limiting vehicle engine speed based on at least one of the operating characteristics may include fuel consumption, vehicle vibration, and vehicle noise emissions. This determines a maximum permissible engine speed. A driver of the vehicle 100 can thereby the engine 231 do not operate in such a way that the engine 231 Provides a higher engine speed than it provides the limitation of the engine speed. The step of limiting the vehicle engine speed is based on the first control arrangement 200 executed.

The process step s450 may be the step of automatically reducing a maximum allowable speed limit of the motor 231 include, if it is judged that an upshift of the automatic transmission 251 at a current or future hillside for the vehicle 100 not suitable.

According to one embodiment, a maximum allowable speed limit of the engine 231 automatically reduced to reduce fuel consumption and / or reduce vehicle vibration and / or reduce vehicle noise emissions. According to one example, the Vehicle engine speed limited so that only one of the given operating characteristics, such as fuel consumption, is taken into account.

According to one embodiment, at least two of the given operating characteristics are taken into account. In one embodiment, the maximum allowable engine speed is limited based on at least two operating characteristics being weighted. Here are two examples of such a weighted set of operating characteristics:

example 1

• 50% to reduce fuel consumption;
• 25% to reduce vehicle vibrations; and
• 25% to reduce vehicle noise emissions.

Example 2

• 80% to reduce fuel consumption;
• 10% to reduce the vehicle vibrations; and
• 10% to reduce vehicle noise emissions.

After the process step s450 becomes a subsequent process step s460 executed.

• - ununterbrochenen Bewerten eines Ergebnisses der Begrenzung der Fahrzeugmotordrehzahl; und
• - Bestimmen, ob die gewählte Begrenzung der Fahrzeugmotordrehzahl einzuhalten oder zu ändern ist.

The process step s460 includes the steps to:

• continuously evaluating a result of limiting the vehicle engine speed; and
• Determine whether to maintain or change the selected vehicle engine speed limit.

The steps of evaluation and determination may be based on the first control arrangement 200 be executed. This can be used to determine whether the operating performance of the vehicle 100 is acceptable when the engine speed limit is activated for a current gear ratio.

If it is determined that the operating conditions change so that a gearshift for upshifting is possible, and that an engine speed of the engine 231 would be at a suitable engine speed interval to provide a sufficiently high acceleration capability of the vehicle, the engine speed limit may be disabled and the gearshift executed directly. Alternatively, a deceleration prior to upshifting may be implemented to achieve a positive margin for engine speed. These operating conditions may be associated with a reduction in the grade of the terrain of the vehicle, a reduction in vehicle mass, an increase in vehicle thrust, and a reduction in vehicle rolling resistance.

After the process step s460 the procedure is ended / returned.

5 is a diagram of an embodiment of a device 500 , The control arrangements 200 and 210 related to 2 can be described in one embodiment, the device 500 include. The device 500 includes a non-volatile memory 520 , a data processing unit 510 and a read / write memory 550 , The non-volatile memory 520 has a first memory element 530 in which a computer program, for example an operating system, for controlling the function of the device 500 is stored. The device 500 Also includes a bus controller, a serial communication port, I / O means, an A / D converter, a time and date input and transmission unit, an event counter, and an interrupt controller (not shown). The non-volatile memory 520 also has a second memory element 540 on.

The computer program P includes routines for automatically reducing a maximum allowable speed limit of the motor 231 if estimated / calculated / determined / modeled / simulated that an upshift of the automatic transmission 251 at a current or future hillside for the vehicle 100 not possible / suitable / acceptable.

The computer program P includes routines for operating a vehicle 100 that a motor 231 and an automatic transmission 251 includes.

The computer program P can routines for determining a slope α of a current terrain of the vehicle 100 include.

The computer program P may include routines for determining an acceleration capability VAccAprev of the vehicle in a current gear stage of the vehicle transmission 251 include.

The computer program P can provide routines for determining an acceleration capability VAccAhigh of the vehicle in a gear, which is higher than the current gear of the vehicle transmission 251 is, include.

The computer program P can routines for simulating an acceleration capability VAccAhigh of the vehicle in a gear that is higher than the current gear of the vehicle transmission 251 is, include.

The computer program P may include routines for determining whether an upshift to the higher gear is acceptable based on the determined grade α , the acceleration capability VAccAprev the vehicle in a current gear and the ability to accelerate VAccAhigh of the vehicle in the gear, which is higher than the current gear.

The computer program P may, if the upshift is unacceptable, include routines for limiting vehicle engine speed considering at least one of the operating characteristics in the form of fuel consumption, vehicle vibrations, and vehicle noise emissions.

The computer program P If the upshift is unacceptable, then routines may be used to automatically reduce a maximum allowable engine speed limit 231 taking into account at least one of the operating characteristics in the form of fuel consumption, vehicle vibrations and vehicle noise emissions.

The computer program P can provide routines for determining the acceleration capability of the vehicle in a number N of gear ratios higher than the current gear stage of the vehicle transmission 251 are based on simulations.

The computer program P can provide routines for each of the gear ratios in number N of gear stages for determining whether an upshift is acceptable.

The computer program P For example, routines may be used to determine that the upshift to the higher gear is unacceptable if the particular grade α an uphill movement of the vehicle 100 provides the acceleration capability VAccAprev the vehicle is given the current gear and the acceleration capability VAccAhigh of the vehicle in the gear stage that is higher than the current gear, is considered to be insufficient.

The computer program P may include routines for limiting vehicle engine speed to reduce fuel consumption and / or reduce vehicle vibration and / or reduce vehicle noise emissions.

• - ununterbrochenen Bewerten eines Ergebnisses der Begrenzung der Fahrzeugmotordrehzahl; und
• - Bestimmen, ob die gewählte Begrenzung der Fahrzeugmotordrehzahl einzuhalten oder zu ändern ist.

The computer program P can include routines for:

• continuously evaluating a result of limiting the vehicle engine speed; and
• Determine whether to maintain or change the selected vehicle engine speed limit.

The computer program P can provide routines for executing any of the process steps related to 4a and 4b listed.

The program P can be in an executable form or in a compressed form in a store 560 and / or in a random access memory 550 be saved.

If it is stated that the computing device 510 Performing a particular function, this means that they have some of the program in the memory 560 is stored, or a certain part of the program, in the read / write memory 550 is stored, executes.

The data processing unit 510 can via a data bus 515 with a data connection 599 communicate. The non-volatile memory 520 is for communication with the data processing unit 510 via a data bus 512 thought. The separate storage 560 is meant to be over a data bus 511 to communicate with the data processing unit. The read / write memory 550 is set up over a data bus 514 with the data processing unit 510 to communicate. The connections L210 . L230 . L231 . L240 . L241 . L250 and L251 for example, to the data port 599 be connected (see 2 ). When data is at the data port 599 are received, they temporarily become in the second memory element 540 saved. When the received input data has been temporarily stored, the data processing unit is 510 set up to execute the code as described above.

Parts of the methods described herein may be used by the device 500 based on the data processing unit 510 running on the program running in the memory 560 or the read / write memory 550 is stored. When the device 500 If the program is running, the method steps and process steps described here are executed.

The foregoing description of the preferred embodiments of the present invention is provided for the purpose of illustration and description. It is not intended to be exhaustive or to limit the invention to the variants described. Of course for the expert numerous changes and variants will be apparent. The embodiments have been chosen and described in order to explain the principles of the invention and their practical applications as well as possible and to thereby enable others skilled in the art to understand the invention for various embodiments and with various modifications as appropriate to the particular use contemplated ,

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2236862 [0004]

Claims (13)

A method of operating a vehicle (100) comprising a motor (231) and an automatic transmission (251), the method comprising the steps of: automatically decreasing (s401; s450) a maximum allowable speed limit of the engine (231) if it is judged that upshift of the automatic transmission (251) is not appropriate for the vehicle (100) at a current or future uphill slope. Method according to Claim 1 method comprising the steps of: - determining (s410) a slope (α) of a current terrain of the vehicle (100); - determining (s420) an acceleration capability (VAccAprev) of the vehicle in a current gear stage of the vehicle transmission (251); and determining (s430) an acceleration capability (VAccAhigh) of the vehicle in a gear stage higher than the current gear stage of the vehicle transmission (251). Method according to Claim 2 method comprising the steps of: determining (s440) whether an upshift to the higher gear is acceptable based on the determined grade (α), the acceleration capability (VAccAprev) of the vehicle in a current gear and the acceleration capability (VAccAhigh) of the vehicle Vehicle in the gear, which is higher than the current gear; and, if unacceptable, automatically decreasing (s450) the maximum allowable speed limit of the engine (231), taking into account at least one of the operating characteristics in the form of fuel consumption, vehicle vibration, and vehicle noise emissions. Method according to Claim 2 or 3 method comprising the steps of: determining (s440) the acceleration capability (VAccAhigh1, VAccAhigh2,..., VAccAhighN) of the vehicle in a number (N) of gear stages higher than the current gear stage of the vehicle transmission (251) by simulations; and for each of the ratios of the number (N) of ratios, determining (s440) whether an upshift is acceptable. Method according to one of Claims 2 to 4 method, comprising the step of: determining (s440) that the upshift to the higher gear level is unacceptable if the determined downhill (α) provides uphill movement of the vehicle, (100) the acceleration capability (VAccAprev) of the vehicle in the current one Gear stage is given and the acceleration capability (VAccAhigh) of the vehicle in the gear stage, which is higher than the current gear, is considered insufficient. Method according to one of Claims 1 to 5 comprising the step of: automatically decreasing (s450) a maximum allowable speed limit of the engine (231) to reduce fuel consumption and / or reduce vehicle vibrations and / or reduce vehicle noise emissions. Method according to one of Claims 2 to 6 method comprising the steps of: - continuously evaluating (s460) a result of limiting the vehicle engine speed; and determining (s460) whether to maintain or change the selected vehicle engine speed limit. A system for operating a vehicle (100) comprising a motor (231) and an automatic transmission (251), the system comprising: Means (200; 210; 500) arranged to automatically reduce a maximum allowable speed limit of the engine (231) if it is judged that the automatic transmission (251) is upshifting at a current or future uphill slope for the vehicle (100) is not suitable. A powertrain for a vehicle (100), the powertrain comprising a motor (231), an automatic transmission (251) and a system according to Claim 8 includes. A vehicle (100; 110) comprising a drive train Claim 9 , Vehicle (100, 110) after Claim 10 wherein the vehicle (100) is one of a truck, a bus or a passenger car. A computer program product comprising instructions that, when the program is executed by a computer (200; 210), causes the computer (200; 210) to perform the steps of the method according to any one of Claims 1 to 7 performs. A computer-readable storage medium comprising instructions that, when executed by a computer (200; 210), cause the computer (200; 210) to perform the steps of the method of any one of Claims 1 to 7 performs.

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