DE102009006032A1 - Method for starting internal combustion engine of e.g. rail-mounted vehicle, involves operating starter of internal combustion engine of vehicle, when engine starting signal is detected by data bus of vehicle - Google Patents

Abstract

The method involves operating a starter (2) of an internal combustion engine of a vehicle when an engine starting signal is detected by a data bus (1) of the vehicle. The starter is continued to operate, until the internal combustion engine runs, even when the engine starting signal is not detected by the data bus of the vehicle. A starter controller (9) is provided for controlling the starter. The engine starting signal seized from the data bus is detected by the controller. An independent claim is also included for a device for starting a combustion engine of a vehicle.

Description

The The present invention relates to a method and a device, to an internal combustion engine, especially at an automatic start to start or to start.

The DE 199 37 460 A1 describes a circuit for the starting process in a motor vehicle, which is ensured by the use of a thyristor even at greatly reduced battery voltage a perfect startup process.

at Prior art motor vehicles are transitioned from a starter lock a (hard-wired) line used only for this purpose a request signal is sent to an engine control unit, when an internal combustion engine of the motor vehicle is to be started. The engine control unit evaluates this request signal, checks certain conditions and actuates a starter when the review was successful.

The The present invention sets itself the task of this approach to simplify the prior art.

According to the invention this task by 'a method for starting an internal combustion engine according to claim 1, by a device for starting an internal combustion engine according to claim 4 and solved by a vehicle according to claim 8. The dependent claims define preferred and advantageous embodiments of the present invention.

in the The present invention provides a method of starting an internal combustion engine of a vehicle, which at least one Data bus, z. B. a CAN data bus or other bus structure for the connection of different electronic components of the Vehicle, comprises, provided. This is for starting or Starting the internal combustion engine, a starter of the internal combustion engine actuated. According to the invention, the starter of the internal combustion engine is actuated only when an engine start signal is detected on the data bus.

With the engine start signal, for example, an engine control unit of the vehicle signals that the driver of the vehicle is the internal combustion engine would like to start. This engine start signal is particular from a vehicle designed for an automatic start then generated when the starting process for the internal combustion engine started by pressing a button once becomes. By detecting this engine start signal from the data bus, can advantageously be an extra hardwired Signal line, over which at vehicles after the state the technique of this engine start signal (or a terminal 50 request) quasi redundant or parallel to the data bus is transmitted, omitted by the present invention.

Different is expressed by the present invention, no engine start signal on a different communication link or line than that at least one data bus to a starter control or engine control, which is present (among other things) for the control of the starter, because the starter control the engine start signal exclusively via the data bus detected. Thus, according to this invention the starter control or engine control is capable of any information necessary for starting the engine Data bus to capture. As a result, the usual in the prior art Additional line for transmission of the engine start signal saved become.

there in particular, the starter will continue to be actuated, until the engine is running, even if the engine start signal no longer detected by the data bus.

With In other words, it is sufficient if the engine start signal once from the data bus is detected in order to operate the starter, until the internal combustion engine is running. This has the advantage that the starter continues to be operated even if the Data bus due to the high starting current for actuation of the starter and due to a frequently occurring Voltage drop is momentarily inactive, so that over the Data bus can not be checked during this time can determine whether the engine start signal is (still) present or not.

In the context of the present invention, a device for starting an internal combustion engine of a vehicle is also provided. In this case, the device comprises a signal generating device, a starter control (for example, a motor control) and a data bus, for. B. a CAN data bus or other bus structure for connection of various electronic components of the vehicle. The signal generating device, such as an electronic control unit integrated ignition control lock or an electronic ignition lock (EZS) or a control element, for example in the form of an ignition switch, generates an engine start signal upon a corresponding actuation of a driver of the vehicle. The starter controller controls or operates a starter of the engine in response to this engine start signal to thereby start the engine. Both the signal generation device and the starter control are connected to the data bus so that they can communicate over the data bus. The Vorrich tion is now designed according to the invention such that the motor start signal is applied exclusively by the signal generating device on the data bus to be detected from there by the starter control.

The Advantages of the device according to the invention correspond essentially the advantages of the invention Method, which has been carried out in detail in advance, so that here is waived a repetition.

According to one inventive embodiment the starter control designed such that the starter control the starter continues to drive or operate in such a way that the starter continues to start the combustion engine, until the internal combustion engine is running, provided that the Starter control once the motor control signal from the data bus has recorded. In other words, the starter control operates then continue the starter until the engine is running, even if the starter control after the single detection of the Motor control signal from the data bus then no more motor control signal recorded on the data bus.

there In particular, there is no separate line next to the data bus, with which the motor start signal from the signal generating device to the starter control will ask. In other words there is the usual discrete according to the prior art Line for transmission of the engine start signal from the ignition lock to the engine control unit according to the present invention Invention just not because the necessary signal transmission only still done over the data bus, reducing costs and weight be saved, potential errors due to the additional Lead to be reduced and thus the availability of the Vehicle is increased.

After all is in the context of the present invention, a vehicle with a device according to the invention provided.

The The present invention is particularly suitable for vehicles with an internal combustion engine suitable. Of course it is the present invention is not limited to this preferred application limited, but can also be used on ships, track-bound Vehicles or aircraft having an internal combustion engine, be used.

in the Below, the present invention will be described with reference to preferred embodiments explained in detail compared to the prior art, with reference to the attached figures.

In 1 a device for operating a starter according to the prior art is shown schematically.

In 2 a device according to the invention for actuating a starter is shown schematically.

3 represents a vehicle according to the invention with a device according to the invention for actuating a starter.

In 1 is a device 3 for starting an internal combustion engine (in 1 not shown) according to the prior art. This device 3 includes a starter lock 5 with an electronic control unit, a starter control 9 , which is usually part of an engine control unit, a CAN data bus 1 and an additional discrete line 6 on which an engine start signal or a 'clamp 50 request' from the ignition lock 5 to the starter control 9 will ask. The starter control 9 in turn comprises a control unit 4 and a relay 11 which is via the control unit 4 is controlled to a starter 2 to start to start the internal combustion engine.

In a conventional automatic starting vehicle, when a corresponding button for starting the engine is pressed, the ignition lock detects it 5 and reports this start request on the one hand via the additional line 6 to the starter control 9 and on the other hand, a signal 7 to the CAN data bus 1 wherein the start request, for example, from a steering column steering module to the CAN data bus 1 is placed. If the control unit 4 over the additional line 6 the engine start signal is received, the control unit checks 4 whether additional conditions for starting the engine are met, such. B. whether the drive train is decoupled in a manual transmission or whether the shift lever is in the correct position in an automatic transmission and the brake is actuated. If these other conditions are met, a 'Terminal 50 (KL-50) signal' will be sent to the relay 11 sent to the starter 2 supplied with power (terminal 15) to start the internal combustion engine. In addition, the terminal signal, terminal 50 'from the control unit 4 via a signal 8th on the CAN data bus 1 placed.

In 2 is a device according to the invention 3 for starting an internal combustion engine shown. The crucial difference between the device 3 according to the prior art and the device according to the invention 3 in 2 is that the inventive device 3 in 2 no additional line between the ignition lock 5 and the starter control 9 has.

Thus, the Zündanlassschloss reports 5 in the device according to the invention 3 the start request only via the CAN data bus 1 to the starter control 9 , When the starter control 9 in the form of the control unit 4 via the CAN data bus 1 detects the driver's start request, checks the control unit 4 the other conditions (see above) and operates the relay 11 if these other conditions are met, to the starter 2 supplied with electricity, as with respect to the device 3 in the prior art 1 has been described.

If the control unit 4 once via the CAN data bus 1 has detected the engine start signal and the other conditions are met, the starter 2 until the internal combustion engine is running or until another fault condition occurs, such as the lapse of a predetermined period of time, without the engine being started. In other words, the starter control checks 9 in the form of the control unit 4 no longer, whether the engine start signal continues on the CAN data bus 1 is present after the starter control 9 once the engine start signal has been detected. This is advantageous because of the immense power requirements of the starter 2 the on-board voltage of the vehicle can break down, causing communication via the CAN data bus 1 could be interrupted so that the starter control 9 the motor start signal via the CAN data bus 1 could not capture even if it continues from the ignition lock 5 on the CAN data bus 1 would be fed.

In 3 is a vehicle according to the invention 10 with a device according to the invention 3 partly shown schematically. About the device according to the invention 3 becomes the starter 2 controlled, over which finally the internal combustion engine 12 of the vehicle 10 can be started.

1

CAN data bus

2

Starter

3

contraption

4

control unit

5

ignition lock

6

discreet management

7

signal or line

8th

signal or line

9

starter control

10

vehicle

11

relay

12

internal combustion engine

KL-15

clamp 15

KL-50

clamp 50

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19937460 A1 [0002]

Claims (8)

Method for starting an internal combustion engine ( 12 ) of a vehicle ( 10 ), wherein for starting the internal combustion engine ( 12 ) a starter ( 2 ) of the internal combustion engine ( 12 ) and the vehicle ( 10 ) at least one data bus ( 1 ), characterized in that the starter ( 2 ) of the internal combustion engine ( 12 ) is actuated when an engine start signal from the at least one data bus ( 1 ) is detected. Method according to claim 1, characterized in that the starter ( 2 ) is continued until the internal combustion engine ( 12 ), even if the motor start signal is then no longer available from the data bus ( 1 ) is detected. Method according to claim 1 or 2, characterized in that a starter control ( 9 ) for controlling the starter ( 2 ), that the starter control ( 9 ) the motor start signal from the data bus ( 1 ), and that no motor start signal on a line other than the data bus ( 1 ) to the starter control ( 9 ) is transmitted. Device for starting an internal combustion engine ( 12 ) of a vehicle ( 10 ), the device ( 3 ) a generating device ( 5 ) for generating a motor start signal, a starter control ( 9 ) for controlling a starter ( 2 ) of the internal combustion engine ( 12 ) depending on the engine start signal and at least one data bus ( 1 ), wherein the generating device ( 5 ) and the starter control ( 9 ) with the at least one data bus ( 1 ) and wherein for starting the internal combustion engine ( 12 ) the ignition ( 2 ), characterized in that the device ( 3 ) is configured such that the engine start signal via the at least one data bus ( 1 ) from the generating device ( 5 ) to the starter control ( 9 ) is transmitted or transferable. Apparatus according to claim 4, characterized in that the starter control ( 9 ) is configured such that the starter control ( 9 ) the starter ( 2 ) continues to drive in such a way that the starter ( 2 ) the internal combustion engine ( 12 ) starts until the combustion engine ( 12 ) runs when the starter control ( 9 ) once the motor control signal from the at least one data bus ( 1 ), even if the starter control ( 9 ) then the motor control signal is no longer from the at least one data bus ( 1 ) detected. Apparatus according to claim 4 or 5, characterized in that none of the at least one data bus ( 1 ) separate line exists, which the motor control signal from the generating device ( 5 ) to the starter control ( 9 ) transmits. Device according to one of claims 4-6, characterized in that the device ( 3 ) is designed for carrying out the method according to one of claims 1-3. Vehicle with a device ( 3 ) according to any one of claims 4-7.