publication number DE102010025335 (A1)
Release date: 2011-02-03
Inventor: STOP RALF [DE]; BOGNER MICHAEL [DE] + (STOP, RALF; BOGNER, MICHAEL)
Applicant: LUK clutch makers BLADES & [DE] + (LUK FINS and clutch BETEILIGUNGS KG)
Classification:
International: B60W10/06; B60W10/08; B60W10/26; B60W20 / 00; F02D45/00
European: B60K6/46; B60W10/06; B60W20/00
Application number: DE201010025335 20,100,628
Priority number (s): DE201010025335 20,100,628; DE200910034809 20,090,727
The EPA is not responsible for the accuracy of data originating from other authorities than the EPO, and liable therefore in particular not for the completeness, timeliness or fitness for a particular purpose. Information, please refer to the respective patent authorities.
translate this text description of DE 102010025335 (A1)
[0001] The present invention relates to a method for controlling a motor vehicle with a hybrid's electric motor, powered by an electric battery and a generator to charge the battery effectively associated internal combustion engine and a control unit for its control.
[0002] are known vehicles powered solely by electricity, in which an electric motor to drive at least one axis of the vehicle and is powered by a rechargeable battery that is charged to a wall outlet again.
[0003] Such vehicles have a relatively short range and are not particularly predictable, profile not fail-safe.
[0004] It is therefore the generic type, proposed the so-called series hybrid vehicles, which are arranged in series with the electric motor, an internal combustion engine is coupled in the first place with a generator is (RAE, range extender unit), who can charge the battery while driving, and, if the electric motor in driving the motor vehicle. The control of the internal combustion engine is dependent on the charge of the battery by the engine is started in bad state of charge and this by the driven by the internal combustion engine generator will be charged with electrical energy. It has been found that the sole control of the internal combustion engine as a function of charge state on the one hand, an uncomfortable and can cause to the other, both for the internal combustion engine as well as for the battery, malicious operation.
[0005] It is therefore control the task of controlling an internal combustion engine in a generic series hybrid car to a comfortable, continuous operation of the accumulator and the internal combustion engine is possible.
[0006] The invention provides a method for controlling a hybrid's motor vehicle with an electric motor, an electric battery-powered and a dependent with a generator to charge the battery effectively associated internal combustion engine and a control unit for controlling the drive unit, in particular the internal combustion engine of a charge state of the battery solved the internal combustion engine controlled at least dependent on any of the following parameters is:
- a retrieved continuous output of the accumulator,
- a temperature of the battery pack
- by vibrations from the motor vehicle,
- a down time of the internal combustion engine.
[0007] The inclusion of parameters that protect the battery and / or the engine from harmful or uncomfortable operating conditions, the comfort and durability generic series hybrid vehicles will be increased.
[0008] In a specific embodiment, the internal combustion engine at an optimal operating point used exclusively to power the generator, an additional kinetic drive for support the electric motor drive can be omitted, so that the internal combustion engine in accordance with low-power, which is sized to provide the of the generated by the internal combustion engine driven generator maximum charge sufficient energy can be interpreted. In other embodiments, the internal combustion engine to support the electric motor drive. An interpretation of the performance can take place so that maximum performance of the motor vehicle during an operation in a hybrid's electric motor and can be obtained from the internal combustion engine combined drive unit. can
[0009] In a conventional manner of operation of the internal combustion engine depends on charging the battery , Carried by the internal combustion engine is started below a predetermined value for the charge of the battery. In a parallel control routine of the module can be dependent on the internal combustion engine of a continuous output of the drive unit acting as the electric motor, for example by the internal combustion engine depends on a predefined value of a duration of a continuous load of the accumulator is started. Here, the charging of the accumulator will be forced at a high load on the battery at high power the electric motor, started by the internal combustion engine and in the loading operation by driving the generator and not or only by a subordinate power in driving support for the kinetic the electric motor is used. This value can be determined the duration of the continuous load above a predetermined value for an electrical size of the accumulator, for example, drawn by the electric motor current flowing through the electric motor to the battery caused voltage drop by the electric motor is called power or the like. The accumulator, a conventional lead-acid battery, a lithium ion battery, a serial and / or parallel connection of several units of these or other electrochemically working batteries or another, be rechargeable electrical storage again, such as a super capacitor or a combined several of these.
[0010] A start of the internal combustion engine and thus charge the battery by the generator or a closure of the electric motor and thus a stop the discharge of the battery with a sole operation of the motor vehicle by means of the internal combustion engine in a control routine can the controller be provided when the accumulator is not within a predetermined temperature range that corresponds to a preferred operating temperature of the battery pack could be used. The accumulator is therefore not unloaded or loaded, when its temperature is not the preferred operating temperature corresponds. In this way the life of the battery is extended in an advantageous way.
[0011] According to Another inventive concept may be the battery by cooling or warming by the operation of the internal combustion engine, especially in connection with the operation of the internal combustion engine that is controlled according to how this started or shut down, kept in the specified temperature range. Here, the wind or for example a Peltier element for cooling and an electric heater powered by electrical energy used to heat the battery.
[0012] It has also been found that impact to the vehicle acting vibrations, such as by driving on poorly paved roads or the like in particular to the negative shut down the engine. May occur, for example bearing damage. To detect the force acting on the vehicle vibration can be one or more acceleration sensors. The evaluation of the detected signals may be in the control unit. Also, the signals to other parts of the motor vehicle is inserted and, if an evaluated acceleration sensors are used by the appropriate use on a data bus such as CAN-Bus data held are. In an appropriate routine when a predetermined value of the vehicle, preferably to start the engine acting vibrations, the internal combustion engine.
[0013] Furthermore, the internal combustion engine Damaged if it is not operated for a long time. For example, this will fail to start, for example by their optimal operating temperature is not maintained with the desired comfort. Furthermore, corrosion caused by condensation and other similar factors make a negative impact. There is therefore provided by the inventive idea to restart the engine within a predetermined value of a downtime this. It has proven to be advantageous if the engine is held after start of operation in a given operation. Takes place in existing or harmful vibrations or for other reasons Start the engine with a sufficient state of charge of the battery can, in a serial arrangement of the internal combustion engine to electric motor on a support or sole driving the motor vehicle made to the internal combustion engine and / or it can heat a supercooled passenger compartment electrically by driving the generator or cool an overheated cabin by adding a Peltier element operated by the generator or an air compressor is driven kinetically by the internal combustion engine.
[0014] It has further proved advantageous if the car is controlled as a function of detection devices to a selected route, according to the route by the electric motor and / or the internal combustion engine track typical modes are subjected. The detection devices can thereby be a navigation system, a traffic information system, a weather forecasting device and / or the like, so that a route can be modeled and calculated in advance before departure and, where necessary, updated during the trip. For example, depending on the determined in this way journey time intervals for the purely electric motor, pure internal combustion engine and / or hybrid's drive of the vehicle at start of the control unit are set using prior uphill grades, the engine runs the generator and thus electrical energy stored, operated on recuperating slopes of the generator, the motor vehicle at low speed, city driving or stuck in traffic is electrically operated and / or driving during breaks, the engine generator to charge the at least partially discharged battery.
[0015] Furthermore, through the control unit different operating conditions set, providing for a pure electric motor driving state, an exclusive driving condition by the internal combustion engine and / or a hybrid's driving condition with a drive through the electric motor and means of the internal combustion engine. For example, in a low state of charge of the rechargeable battery, a combined charging the battery through the internal combustion engine and a supportive running state are elected by the internal combustion engine. This means that the vehicle is running while charging the battery. The same approach can at high continuous output of the accumulator can be provided by a combined operation, charging of the battery through the internal combustion engine and a driving state, such as hybrid, purely electric motor or exclusively selected by the internal combustion engine.
[0016] The exclusive operation of the internal combustion engine to drive the generator, the electric motor is the only drive. the engine when the electric motor drive support is generated by the internal combustion engine performance primarily for the Driving condition and also produced electrical energy to charge the battery used.
[0017] In a driving state in which only drives the electric motor, and at a predetermined outside an operating temperature of the battery lying temperature of the battery can only choose one by the generator provided electricity for the operation of the motor vehicle and started a charge process time if the battery is put back within the specified operating temperature. If due to an overrun in the motor vehicle occurring vibration-started the engine, the generator can be operated only in the charging state. In due exceeded an idle time-started the engine, the generator can also be operated exclusively in the state of charge.
[0018] The invention is based on the detail in the 1 and 2, exemplary embodiments. This shows
[0019] 1 is a routine for operating a motor vehicle with an electric motor at an optimum operating point, steady-burn internal combustion engine and
[0020] 2, a routine for operating a motor vehicle with an electric motor at several operating point of stationary internal combustion engine operated.
[0021] 1 1 shows a routine for controlling an internal combustion engine in a motor vehicle with a electric motor drive unit. In the blocks 2, 3, 4, 5, 6, 7, 8, the conditions B1, B2, B3, B4, B5, B6, B7 for starting the internal combustion engine in block 11 tested predetermined and whose presence in the decision field. If the corresponding condition B1, B2, B3, B4, B5, B6, B7, starts the engine. The conditions are:
B1 charge of the battery is too low,
B2 continuous power or peak power of the battery is too high,
B3 operating temperature of the battery is too high,
B4 operating temperature of the battery too low to have
B5 in the motor vehicle registered vibrations too high , B6
downtime of the engine too high, B7
temperature of the passenger compartment is too low.
[0022] In block 10 are different conditions along one before leaving on a trip and updated as necessary during the journey, route-specific conditions prior to B8, leading to a direct start of the internal combustion engine in block 11.
[0023] 2 shows the routine 1a as a flow diagram in which the blocks 12, 13, 14, 15, 16, 17, the conditions B1, B2, B3, B4, B5, formed B6, which follows in detail as
B1 charge of the battery is too low,
B2 continuous power or peak power of the battery to high operating temperature of the battery B3
too high: are
B4 operating temperature of the battery is too low,
B5 in the motor vehicle registered vibrations are too high,
B6 defined downtime of the engine too high and in the decision boxes 18, 19, 20 tested for their performance or existence is. Provided that the conditions B1, B2, B3, B4, B5, B6, respectively, different driving conditions such as operating conditions BZ1, BZ2, BZ3 in blocks 21, 22, set 23rd For example, if at least one of the conditions B1 and B2 with a too low charge of the battery and / or excessive duration of performance is met, the operating state, a start of the internal combustion engine with a BZ1 charging of the accumulator by the generator and a driving mode, in which part of the the generated by the internal combustion engine driven electrical power generator to the electric motor to drive the motor vehicle is provided. Is one of the conditions B3, B4, complying with a too high or to define low operating temperature of the battery pack is in operation BZ2 started the engine and that of the driven by the internal combustion engine generator electric energy produced exclusively by the electric motor for driving the motor vehicle provided . Are registered to the vehicle vibration condition B5 is too high and / or the downtime of the engine in condition B6 too high, the operating state BZ3 the engine started and the engine, driven by this generator, the energy produced only charging the battery available.
numeral list
1: Routine
1a: Routine
2: Block
3: Block
4: Block
5: Block
6: Block
7: Block
8: Block
9: Decision Field
10: Block
11: Block
12: Block
13: Block
14: Block
15: Block
16: Block
17: Block
18: Decision Field
19: Decision Field
20: Decision field
21: Block
22: Block
23: Block
B1: B2
condition: Condition
B3: Condition
B4: Condition
B5: Condition
B6: Condition
B7: Condition
B8: Condition
BZ1: Status
BZ2: Status
BZ3: Status
METHOD FOR CONTROLLING A HYBRID VEHICLE
Technical and scientific translations
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