DE102013216426A1 - Autonomous stand shop - Google Patents

Abstract

Vehicle having an internal combustion engine, a generator and a secondary energy storage, wherein the energy storage is chargeable with deliverable electrical power from the generator, so that the energy storage in the state of the vehicle is loadable and the internal combustion engine for the purpose of charging in the state by a diagnostic operation is startable ,

Description

The invention relates to a vehicle having an internal combustion engine, a generator and a secondary energy store, wherein the energy store can be charged with electrical power that can be output by the generator.

From the prior art (eg from the Scriptures DE 10 2009 001 705 ), an electric vehicle is known which comprises a traction battery, an electric machine, a battery charger, an AC voltage terminal, a generator and an internal combustion engine. A starting of the internal combustion engine takes place by means of the de operating in motor operation generator. The AC voltage required by the generator for starting the internal combustion engine is provided by the battery charger, which converts a DC voltage derived from the traction battery into the AC voltage required by the generator to start the internal combustion engine.

For charging, the electric vehicle can be connected to an external power source via the AC voltage connection.

It is an object of the invention to provide an improved vehicle having an internal combustion engine, a generator and a secondary energy store, wherein the energy store can be loaded with electrical power that can be output by the generator.

This object is achieved by a vehicle according to claim 1. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

According to the invention, the energy store in the state of the vehicle is loadable and it is the internal combustion engine for the purpose of charging in the state by a diagnostic operation startable.

This means that in an energy management of the vehicle, a possibility of intervention via a diagnostic process is provided, which makes it possible to trigger a charging process of the energy storage. This can be advantageous, for example, at a vehicle dealer in the workshop or in the sales area. Also in vehicle development when working with test and development vehicles is a control of the energy management of the vehicle advantage.

A charging process that can be triggered in this manner is also referred to as autonomous standby charging.

Energy management is a software module that can run on a control unit of the vehicle and that controls and regulates the energy and power flows in the electrical system of the vehicle. This is implemented by means of information and commands via a vehicle on-board network.

According to a particularly preferred embodiment of the present invention, the diagnostic process between a data processing unit outside the onboard network of the vehicle and at least one control unit within the onboard network of the vehicle executable.

This means that a skilled user of the invention can "charge from the outside" for charging the energy store via the on-board internal combustion engine by using a vehicle software compatible diagnostic device or a data processing device (eg, a computer with software installed on the vehicle software compatible ) communicates with the vehicle via a data link to perform a diagnostic operation on the vehicle. The diagnostic process involves loading the memory by means of the internal combustion engine and generator, whereby the charging from outside the vehicle can be triggered.

Preferably, a communication between the data processing unit and the control unit via an OBD interface (on-board diagnostic interface) of the vehicle produced.

Alternatively, other interfaces may be used between the data processing unit and the onboard vehicle network, preferably with standardized protocols.

According to a further variant of the present invention, the diagnostic process can be executed as a diagnostic instruction.

A diagnostic statement is also called a diagnostic job. A diagnostic job is essentially formed by a receiver address of the control unit and by a command to the relevant control unit. Preferably, it is an engine control unit.

This means that a specific job is provided in the vehicle diagnostics, enabling autonomous standby charging.

According to a preferred embodiment of the present invention, the charging is interruptible by a terminal change of the vehicle or by a diagnostic instruction.

The vehicle diagnosis thus also includes a diagnostic instruction, which makes it possible to terminate the stand-alone autonomy "from outside". A carried out on the vehicle terminal change, the z. B. represents a transition from the stationary operation in the driving, also leads to the termination of the autonomous store shop.

It may also be advantageous if the charging can be interrupted or terminated by a control unit of the vehicle when the energy store is fully charged.

The autonomous stand charge is thus terminated when the battery is full. The internal combustion engine is switched off and the vehicle falls asleep.

The invention is based on the following considerations:
It is assumed that a vehicle, which via two drive systems in the form of an internal combustion engine and an electric machine and an electrical energy storage, for. B. has a battery features. It is possible to charge the battery via the mains. In particular, plug-in vehicles that are designed as hybrid vehicles or battery vehicles with a range extender are considered.

A charge via the power network takes in the prior art in the event that z. B. no fast charging system is available, compared to a refueling process in a conventional vehicle for a very long time.

In vehicle development, however, it is often necessary to perform tests with a full memory, especially in tests that refer to a fully charged memory itself or for which a fully loaded memory for complete test execution is necessary.

Depending on the scope of the demonstration, only a small number of demonstrations can be carried out in the sales department or even per day for product demonstrations with a long loading time.

It is proposed to develop a function for the autonomous charging of vehicles in the state for a fast storage charge, especially in an application mode or a distribution operation of the vehicle. In this case, an externally executable on the vehicle diagnostic job or a sequence of diagnostic jobs is provided to trigger the automated stall loading.

When the diagnostic job is executed, the state of charge of the memory is determined first. If the state of charge does not correspond to the fully charged state, the internal combustion engine is started.

Based on a specifiable charging power, the tappable torque and the speed of the engine are set in the vehicle and the memory is loaded. When the full charge state is reached, the diagnostic job ends the charging process via the internal combustion engine. This is turned off and the vehicle falls asleep.

Alternatively, the charging process by a terminal change z. As the terminal 15 or the terminal 30, finished.

In this way, a charge of the vehicle via a vehicle diagnostic process, for. For example, an OBD book and the compatible vehicle diagnostic software within which the diagnostic job is executable can be initiated and executed. This is done regardless of the availability of a vehicle external charging station. Usually, a range extender engine z. B. in a battery vehicle at an end user only when falling below a state of charge criterion by the energy management started.

The proposed solution offers the possibility to force a charging regardless of the state of charge - except when fully charged battery - in any case to achieve the full charge of the memory.

In addition, this charge takes place via the internal combustion engine at the same loading stroke and at about ten times the charging power much faster than about the mains when charging with single-phase alternating current. Thus, significantly more applications can be performed at full memory or product demonstrations per unit of time. The test engineer or dealer can also triggers the vehicle external charging. This is advantageous for activities on the vehicle, which are not necessarily carried out in the vehicle itself.

Hereinafter, a preferred embodiment of the invention will be described. This results in further details, preferred embodiments and further developments of the invention.

The exemplary embodiment is concerned with a vehicle which has two drive systems in the form of an internal combustion engine (internal combustion engine) and in the form of an electric machine and a generator and an electrical energy storage, for. B. has a battery features. It is possible to charge the battery with DC or AC power via the vehicle external power supply.

There will be particular plug-in vehicles, which are called hybrid vehicles with a Engine or battery vehicles are designed with a range extender engine as an internal combustion engine considered. The range extender engine, which is preferably operable at an optimized operating point, has the function to extend the range while driving the vehicle by the range extender with empty or not sufficiently charged energy storage via the generator electrical power to drive the electric machine of the vehicle provides. To do this, the range extender burns fossil fuel.

Unlike a range extender engine is a hybrid vehicle also has a direct, mechanical penetration of the internal combustion engine to the transmission.

The internal combustion engine in the state of the vehicle can be used to charge the battery without the vehicle being charged as a plug-in vehicle on an external power supply.

For this purpose, a diagnostic job is provided, via which a command can be sent from outside the vehicle's on-board network to the engine control unit of the internal combustion engine.

The diagnostic job can be performed, for example, via an OBD interface of the vehicle with a diagnostic device or with a laptop on which a software compatible with the onboard network and the engine control unit (vehicle-compatible application software) is installed.

• 1) Ermittlung des Ladezustands der Batterie
• 2) Bei einem Ladezustand unterhalb eines Ziel-Ladezustand der Batterie Starten des Verbrennungsmotors und Vorgabe einer Soll-Ladeleistung an den Generator.
• 3) Anpassung der Drehzahl des Motors an die Soll-Ladeleistung, d. h. Bereitstellung ausreichender mechanischer Leistung durch den Motor an den Generator zur Bereitstellung von elektrischer Leistung durch den Generator, die der Soll-Ladeleistung entspricht.
• 4) Ausschalten des Verbrennungsmotors bei Erreichen eines Ziel-Ladezustands der Batterie oder Ausschalten des Verbrennungsmotors bei einem Klemmenwechsel

Execution of the diagnostic job leads to the following operations in the vehicle:

• 1) Determination of the state of charge of the battery
• 2) In a state of charge below a target state of charge of the battery starting the internal combustion engine and specification of a target charging power to the generator.
• 3) Adjustment of the speed of the motor to the desired charging power, ie providing sufficient mechanical power by the motor to the generator for providing electrical power through the generator, which corresponds to the target charging power.
• 4) Turning off the internal combustion engine upon reaching a target state of charge of the battery or switching off the internal combustion engine at a terminal change

The state of charge of the battery can be read out by the engine control unit from a battery control unit via the on-board network. The nominal charging power results from the battery temperature, the component or medium temperatures of the engine and the acoustic boundary conditions of the engine operation.

The target state of charge of the battery corresponds to the full charge state of the battery.

This embodiment provides an ad-hoc charge possibility (also referred to as autonomous stand charge) for the development operation at the manufacturer and for the maintenance and marketing operation at a dealer.

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

• DE 102009001705 [0002]

Claims (6)

Vehicle having an internal combustion engine, a generator and a secondary energy storage device, wherein the energy storage device can be charged with electrical power that can be output by the generator, characterized in that - the energy storage device is chargeable in the state of the vehicle and - the internal combustion engine is stationary for the purpose of charging Diagnostic process is bootable. Vehicle according to claim 1, characterized in that - the diagnostic process between a data processing unit outside an on-board vehicle network and at least one control unit within the onboard network of the vehicle is executable. Vehicle according to claim 2, characterized in that - a communication between the data processing unit and the control unit via an OBD interface of the vehicle can be produced. Vehicle according to one of the preceding claims, characterized in that - the diagnostic process is carried out as a diagnostic instruction. Vehicle according to one of the preceding claims, characterized in that - the charging is interrupted by a terminal change of the vehicle or by another other diagnostic process. Vehicle according to one of claims 1 to 4, characterized in that - the charging is interrupted at fully charged energy storage by a control unit of the vehicle.