WO2011029414A1

WO2011029414A1 - Control system for daytime running light and control method thereof

Info

Publication number: WO2011029414A1
Application number: PCT/CN2010/076875
Authority: WO
Inventors: 张一强
Original assignee: 奇瑞汽车股份有限公司; 芜湖普威技研有限公司
Priority date: 2009-09-14
Filing date: 2010-09-14
Publication date: 2011-03-17
Also published as: CN101659230A

Abstract

A control system for a daytime running light and a control method thereof are provided. Said control system comprises a body control module (1) and daytime running lights (2). Said body control module (1) is used to receive or determine the operating signal of an engine (7), the signal of an electronic parking (5) and/or the gear position signal of an automatic transmission (6), and the operating status of headlights (3, 4) so as to drive and control the daytime running lights (2). Said control system distinguishes the control logic for daytime running lights of a manual shift vehicle from that of an automatic shift vehicle, takes customer's preferences fully into account, and utilizes the body control module (1) to drive and control the daytime running lights (2) without an additional control module. Signal transmission can be achieved via CAN network, thereby ensuring the timeliness and accuracy of the signal transmission. A control circuit comprises a diagnostic function and can monitor the operating status of the daytime running lights (2) in real time.

Description

Daytime running light control system and control method thereof

The invention relates to a lighting system control strategy for a vehicle during daytime driving, and particularly relates to a daytime running light control system and a control method thereof. Background technique

In order to improve the safety of traffic roads, the European Commission (EC) has decided to introduce dedicated daytime running lights for various motor vehicles starting in 2011: New models for cars and vans launched after February 7, 2011 must be equipped with daytime The starting date for the implementation of this regulation for driving lights, trucks and buses is August 2012. The new standard states: Daytime running lights should be automatically turned on after the vehicle engine is started. After dark, when the driver manually turns on the conventional lighting, the daytime running lights will automatically go out. The daytime running lights can effectively improve the visibility and visibility of the car, which helps to improve the safety of the vehicle. The vehicle lighting system used is more energy efficient.

According to research, daytime running lights can provide the necessary protection for safe road driving. When daytime running lights are used in cars, trucks and buses, the above vehicles are more conspicuous, which will help improve road safety and enable road users to detect and identify other road users earlier, including pedestrians and bicycles. People and motorists can also better distinguish motor vehicles; therefore, the use of daytime running lights will effectively reduce road traffic accidents. And from the perspective of energy saving, the daytime running lights are for daytime lighting and have special control logic. Therefore, compared with the current frontlight low beam on the motor vehicle, it has lower energy consumption. However, there is no mature and concise daytime running light control system and its control method in the prior art. Summary of the invention

The technical problem to be solved by the present invention is to provide a daytime running light control system and a control method thereof according to the deficiencies of the prior art, and the purpose is to control and drive the daytime running lights through the vehicle body controller, taking into consideration The use of both manual and automatic transmissions receives signals via the CAN (Controller Area Network) network and signals the operation and status to the instrument.

Specifically, an object of the present invention is to provide a daytime running light control system and a control method thereof, which receive an engine working signal, an electronic parking signal, an automatic transmission gear position signal, and a body controller through a high speed CAN network. The above signal and the working state of the headlights are determined according to the daytime running light control logic to drive the daytime running lights to work normally; and the corresponding daytime running lights can be sent to the combination meter through the low speed CAN network. Indication signal.

The present invention solves the technical problem described by the following technical solutions:

A daytime running light control system includes a body controller BCM and a daytime running light, wherein the body controller (Body Control Module, BCM for short) is used to receive an engine working signal, an electronic parking signal, and a front The operating status of the headlights and/or the automatic transmission gear position signal, and based on the status of these signals, drive and control the daytime running lights.

The BCM receives the engine operating signal, the electronic parking signal, and the automatic transmission gear position signal through a high speed CAN network.

The utility model further comprises a combination meter, wherein the BCM sends a corresponding daytime running light work indication signal to the combination meter through the low speed CAN network, and the combination meter is used to display the daytime running light work indication.

The headlights include a high beam and a low beam.

A fault diagnosis circuit is provided in the control circuit inside the BCM for detecting the fault of the daytime running light in real time.

The fault diagnosis circuit is an open circuit and short circuit fault diagnosis circuit, which is connected to the combination meter through a low speed CAN network, and the combination meter is configured to receive a fault signal and display a corresponding daytime running light fault prompt.

The control method of the above daytime running light control system adopts the following steps:

Step 1, the BCM receives the engine working signal, the electronic parking signal and/or the automatic transmission gear position signal; Step 2, the BCM determines the working state of the headlights;

Step 3: Based on the above signals and the working state of the headlights, the BCM determines whether to drive the daytime running lights to operate normally according to the daytime running light control logic.

In step 3, the BCM can simultaneously send a corresponding daytime running light work indication signal to the combination meter.

The daytime running light control logic described in step 3, the algorithm of the automatic gearing vehicle is: when the engine has been started, and the headlights are not illuminated, and the gearbox position is not in the P position (ie, the parking gear) or N gear (ie neutral), and the hand brake or electronic parking function is not activated, the daytime running lights of the automatic gear are illuminated; when one of the above conditions is not met, the daytime running lights of the automatic gear will Not lit.

The daytime running light control logic in step 3, the algorithm of the manual gear vehicle is: the engine has started, the headlights are not lit, and the handbrake or electronic parking function is not activated, the daytime of the manual gear vehicle The running lights are illuminated; when one of the above conditions is not met, the daytime running lights of the manual transmission vehicles will not be illuminated.

Compared with the prior art, the present invention has the following beneficial effects:

1. Differentiate the daytime running light control logic of manual and automatic vehicles, fully consider the customer Habit

2. Using the body controller to drive and control the daytime running lights, no separate controller is needed; and the signal transmission can be realized through the CAN network, ensuring the timeliness and accuracy of signal transmission;

3. The control circuit includes a diagnostic function to monitor the working status of the daytime running lights in real time. DRAWINGS

Figure 1 is a timing diagram of the control logic of the daytime running lights of the automatic transmission vehicle;

2 is a timing diagram of a daytime running light control logic of a manual gear vehicle;

Figure 3 is a schematic diagram of the daytime running light control system;

Figure 4 is a schematic diagram of the daytime running light control circuit.

In the picture:

1: Body controller

2: Daytime running lights

3: low beam

4: High beam

5: Electronic parking

6: Automatic gearbox

7: Engine ECU ( Electronic Control Unit)

8: Combination meter

9: High speed CAN network

10: Low speed CAN network

11: Diagnostic circuit

12: Microprocessor

13: Control signal

14: Power supply

2- 1: Right daytime running lights

2-2: Left Daytime Running Lights

The invention is described in detail below with reference to the accompanying drawings, which is a preferred embodiment of various embodiments of the invention Example.

The invention drives and controls the daytime running lights through the Body Control Module (BCM), without adding additional control modules and driving modules; at the same time, in order to meet the requirements of various regulations and taking into account the customers The habit of using the automatic and manual gears for vehicles currently on the market, the daytime running lights control logic is also divided into automatic gear control logic and manual gear control logic:

1. The daytime running light control logic of the automatic gear vehicle

1. The engine has started;

2. The headlights are not lit (the headlights include high beam and low beam);

3. The gearbox position is not in the P or N position;

4. The handbrake or electronic parking function is not activated;

When all of the above conditions are met at the same time, the daytime running lights of the automatic transmission vehicle will be illuminated;

The timing diagram of the daytime running light control logic of the automatic transmission vehicle is shown in Fig. 1.

The daytime running light control logic of the manual gear:

1. The engine has started;

2. The headlights are not lit (the headlights include high beam and low beam);

3. The handbrake or electronic parking function is not activated;

When all of the above conditions are met at the same time, the daytime running lights of the manual transmission vehicle will be illuminated;

The timing diagram of the daytime running lights control logic for manual vehicles is shown in Figure 2.

The body controller is the core component of the daytime running light control system. The body controller 1 will be responsible for driving the low beam 3, the high beam 4, the daytime running light 2, and receiving the engine from the high speed CAN network 9. The signal of the electronic parking 5, the automatic transmission 6, and then the daytime running light operating status signal is sent to the combination meter 8 on the low speed CAN network 10. The block diagram of the daytime running light control system is shown in Figure 3.

At the same time, in the control circuit inside the body controller 1, a fault diagnosis circuit 11 is provided, as shown in FIG. 4, the daytime running lights can be detected in real time (such as left daytime running lights 2-1, left day driving) Open and short circuit failure of lamp 2-2). When the body controller 1 checks that the daytime running lights are open or shorted, it will pass the low speed CAN network to the combination meter.

8 Issue the daytime running light fault signal, and the combination meter 8 can display the corresponding daytime running light fault indication according to this signal. Among them, BCM: Body Control Module; P file: parking gear; N gear: neutral; D gear: driving gear.

1. The present invention is driven by the body controller BCM to drive the daytime running lights without additional separate controllers; 2. The invention simultaneously takes into account the daytime running light control logic of both manual and automatic gearbox vehicles, Fully meet customer requirements;

3. The invention is applicable to all models with CAN network communication, engine working state signal, electronic parking signal, gearbox signal, all obtained through high-speed CAN network communication, communication time is millisecond, which ensures the timeliness of signal transmission and Accuracy; At the same time, the daytime running lights can be sent to the combination meter through the low-speed CAN network, and the daytime running lights work instructions are displayed on the meter;

4. In the control circuit of the present invention, there is an open circuit and short circuit fault diagnosis circuit, which can effectively monitor the working condition of the daytime running light, and promptly present the working condition to the driver of the vehicle.

The present invention has been exemplarily described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited to the above-described manner, as long as various improvements made by the method concept and technical solution of the present invention are adopted, or directly applied to other Occasionally, it is within the scope of the present invention.

It should be noted that the above embodiments are only intended to illustrate the invention and are not to be construed as limiting the scope of the invention. The spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

Claim

A daytime running light control system, comprising: a body controller and a daytime running light, wherein the body controller is configured to receive an engine working signal, an electronic parking signal, and a headlight Status and / or automatic transmission gear signals, and drive and control the daytime running lights based on the status of these signals.

2. The daytime running light control system of claim 1 wherein said body controller receives said engine operating signal, electronic parking signal and automatic transmission gear position signal via a high speed network.

3. The daytime running light control system according to claim 1, further comprising a combination meter, wherein the body controller transmits a corresponding daytime running light work indication signal to the combination meter through the low speed network, and the combination The meter is used to display the daytime running light work instructions.

The daytime running light control system according to any one of claims 1 to 3, wherein the headlights comprise a high beam and a low beam.

The daytime running light control system according to any one of claims 1 to 3, wherein a fault diagnosis circuit is provided in the control circuit inside the vehicle body controller for detecting the daytime in real time. The malfunction of the running lights.

6. The daytime running light control system according to claim 5, wherein the fault diagnosis circuit is an open circuit and short circuit fault diagnosis circuit, which is connected to the combination meter through a low speed network, and the combination meter is configured to receive the fault. The signal and the corresponding daytime running light fault prompt are displayed.

7. The method of controlling a daytime running light control system according to any of claims 1-6, characterized in that the following steps are taken:

Step 1. The body controller receives an engine operating signal, an electronic parking signal, and/or an automatic transmission gear position signal;

Step 2: The body controller determines the working state of the headlights;

Step 3: The body controller determines whether to drive the daytime running lights to work normally according to the above-mentioned signals and the working state of the headlights according to the daytime running light control logic.

8. The control method of the daytime running light control system according to claim 7, wherein in step 3, the body controller simultaneously transmits a corresponding daytime running light work indication signal to the combination meter.

9. The control method of the daytime running light control system according to claim 7, wherein the daytime running light control logic in step 3, the algorithm of the automatic geared vehicle is: when the engine has been started, and The headlights are not lit, and the gear position is not in P or N, and the handbrake or electronic parking function is not activated. The daytime running lights of the automatic vehicles are illuminated; when one of the above conditions is not met The daytime running lights of the automatic transmission vehicles will not be illuminated.

10. The control method of the daytime running light control system according to claim 7, wherein the daytime running light control logic in step 3, the algorithm of the manual geared vehicle is: the engine has been started, and the front The headlights are not lit, and the handbrake or electronic parking function is not activated. The daytime running lights of the manual gears are illuminated; when one of the above conditions is not met, the daytime running lights of the manual gears will not be Light up.