CN102606318A

CN102606318A - Intelligent remote accelerator switching controller based on CAN (controller area network) bus and control method

Info

Publication number: CN102606318A
Application number: CN2012100942634A
Authority: CN
Inventors: 杨勇; 张耘强; 胡建中; 林少豪
Original assignee: SAIC Iveco Hongyan Commercial Vehicle Co Ltd
Current assignee: SAIC Hongyan Automotive Co Ltd
Priority date: 2012-04-01
Filing date: 2012-04-01
Publication date: 2012-07-25
Anticipated expiration: 2032-04-01
Also published as: CN102606318B

Abstract

The invention discloses an intelligent remote accelerator switching controller based on a CAN (controller area network) bus, which comprises a main accelerator, a remote accelerator, an engine ECU (electronic control unit), a remote accelerator switching controller, a CAN and a vehicular instrument. The main accelerator, the remote accelerator and the engine ECU are connected into the remote accelerator switching controller in parallel, and the remote accelerator switching controller is communicated with the vehicular instrument via the CAN. The invention further discloses an intelligent remote accelerator switching control method based on the CAN bus. The intelligent remote accelerator switching controller and the intelligent remote accelerator switching control method have the advantages that the operating accelerator is automatically identified by means of electronic control, a selector switch for switching the accelerators is omitted, accordingly, cost is reduced, installation and operation are convenient, the main accelerator or the remote accelerator is selected by means of acquiring the vehicle speed and applying a certain judging strategy, and driving safety is enhanced.

Description

Intelligent remote throttle switching controller and controlling method based on the CAN bus

Technical field

The present invention relates to a kind of vehicle accelerator control technique, relate in particular to a kind of intelligent remote throttle switching controller and controlling method based on the CAN bus.

Background technique

Along with the great development of national economy, urbanization, the demand of engineering machinery is grown with each passing day.This type engineering machinery need make vehicle under idling mode under some operating mode, the control engine speed, and making motor is that car-mounted device provides power; If using the main throttle pedal operates; Often very inconvenient; Many times need outside operator cabin, utilize special long-range throttle that engine speed is controlled, wherein in fact; The throttle of being responsible for vehicle driving on such vehicle is commonly defined as main throttle, and the throttle of being responsible for the action of car-mounted device is commonly defined as long-range throttle; Obviously, main throttle and long-range throttle need certain handover mechanism to stablize, to work safely by support vehicles;

Throttle switching controller in the past all needs a special throttle selector switch; Select main throttle to work or long-range throttle works through selector switch; The increase of selector switch often relates to the change of instrument platen; If the instrument platen does not have many switch hole positions, possibly also relate to the die sinking again of instrument platen, these all can cause the cost that increases; Moreover throttle switching controller is not in the past judged the state of vehicle when realizing the throttle conversion, if when driving, has carried out the misoperation that throttle switches, and this will bring bigger hidden danger to traffic safety.

Summary of the invention

To the problem in the background technique, the present invention proposes a kind of intelligent remote throttle switching controller based on the CAN bus, its structure is: it is made up of main throttle, long-range throttle, Engine ECU, long-range throttle switching controller, CAN network and onboard instruments; The long-range throttle switching controller of the parallel access of main throttle, long-range throttle and Engine ECU three; Communicate through the CAN network between long-range throttle switching controller and the onboard instruments;

Onboard instruments transfers to long-range throttle switching controller through the CAN network with GES;

Long-range throttle switching controller is controlled gating or disconnection between main throttle and long-range throttle and the Engine ECU according to GES, main throttle position signal and long-range throttle position signal.

The invention allows for a kind of preferred structure of long-range throttle switching controller: said long-range throttle switching controller is made up of multiway analog switch, CAN module, A/D module and single-chip microcomputer; Multiway analog switch, CAN module and A/D module three are connected with single-chip microcomputer;

Single-chip microcomputer raises from the CAN network through the CAN module and fetches data;

Single-chip microcomputer is through gating or disconnection between multiway analog switch control main throttle and long-range throttle and the Engine ECU;

Single-chip microcomputer is gathered main throttle position signal and long-range throttle position signal through the A/D module.

On the basis of aforementioned hardware configuration, the invention allows for a kind of intelligent remote throttle switching control method based on the CAN bus, this controlling method step is:

1) program initialization;

2) single-chip microcomputer is gathered the main throttle position signal through the A/D module, gets into step 3) if the A/D transformation result of main throttle position signal is zero; If the A/D transformation result of main throttle position signal is non-vanishing, then get into step 6);

3) single-chip microcomputer is gathered long-range throttle position signal through the A/D module, if the A/D transformation result of long-range throttle position signal is zero, then gets into step 6); If the A/D transformation result of long-range throttle position signal is non-vanishing, then get into step 4);

4) single-chip microcomputer obtains the GES that onboard instruments sends over through the CAN module from the CAN network, if the speed of a motor vehicle is zero, then gets into step 5); If the speed of a motor vehicle is non-vanishing, then get into step 6);

5) single-chip microcomputer is controlled long-range throttle and Engine ECU gating through multiway analog switch, and provides throttle position signal to Engine ECU by long-range throttle; Return step 2);

6) single-chip microcomputer is controlled main throttle and Engine ECU gating through multiway analog switch, and provides throttle position signal to Engine ECU by main throttle; Return step 2);

Behind the program start, abovementioned steps 2) to 6) circular flow.

Useful technique effect of the present invention is: the throttle through automatically controlled mode comes automatic identification operating need not the switching of throttle selector switch, thereby reduces cost, installation, easy to operate; And through gathering the speed of a motor vehicle, use certain determination strategy to select main throttle or long-range throttle, increase traveling security.

Description of drawings

Fig. 1, system architecture principle schematic of the present invention;

Fig. 2, long-range throttle switching controller structural principle schematic representation of the present invention;

Fig. 3, long-range throttle switching controller processing procedure flow diagram of the present invention.

Embodiment

CAN (Controller Area Network local area control net) bus is proposed by BOSCH company; It has advantages such as outstanding reliability, real-time; And its application in automobile industry is very ripe, stable; The inventor considers this bussing technique is used for the communication of controller of the present invention and other electronics module, can guarantee that controller can get access to accurate, real-time information.Given this, scheme of the present invention is:

A kind of intelligent remote throttle switching controller based on the CAN bus, it is made up of main throttle 1, long-range throttle 2, Engine ECU 3, long-range throttle switching controller 4, CAN network 5 and onboard instruments 6; The long-range throttle switching controller 4 of the parallel access of main throttle 1, long-range throttle 2 and Engine ECU 3 threes; Communicate through CAN network 5 between long-range throttle switching controller 4 and the onboard instruments 6; Onboard instruments 6 transfers to long-range throttle switching controller 4 through CAN network 5 with GES; Long-range throttle switching controller 4 is controlled gating or disconnection between main throttle 1 and long-range throttle 2 and the Engine ECU 3 according to GES, main throttle 1 position signal and long-range throttle 2 position signals.

Aforesaid controller adopts mature C AN bussing technique to ensure the efficient, stable of communication, and long-range throttle switching controller 4 adopts electronic control module to realize that volume is little, can be integrated in the operator cabin, and cab space is not almost had influence; Simultaneously, the selection of main throttle 1 and long-range throttle 2 need not special selector switch and just can discern the throttle of operating automatically, has ensured handling safety, has stopped the possibility of misoperation.

The invention allows for a kind of concrete structure mode of long-range throttle switching controller 4: said long-range throttle switching controller 4 is made up of multiway analog switch 4-1, CAN module 4-2, A/D module 4-5 and single-chip microcomputer 4-6; Multiway analog switch 4-1, CAN module 4-2 and A/D module 4-5 three are connected with single-chip microcomputer 4-6;

Single-chip microcomputer 4-6 raises from CAN network 5 through CAN module 4-2 and fetches data;

Single-chip microcomputer 4-6 is through gating or disconnection between multiway analog switch 4-1 control main throttle 1 and long-range throttle 2 and the Engine ECU 3;

Single-chip microcomputer 4-6 gathers main throttle 1 position signal and long-range throttle 2 position signals through A/D module 4-5.

1) program initialization;

2) single-chip microcomputer 4-6 gathers main throttle 1 position signal through A/D module 4-5, gets into step 3) if the A/D transformation result of main throttle 1 position signal is zero; If the A/D transformation result of main throttle 1 position signal is non-vanishing, then get into step 6);

3) single-chip microcomputer 4-6 gathers long-range throttle 2 position signals through A/D module 4-5, if the A/D transformation result of long-range throttle 2 position signals is zero, then gets into step 6); If the A/D transformation result of long-range throttle 2 position signals is non-vanishing, then get into step 4);

4) single-chip microcomputer 4-6 obtains the GES that onboard instruments 6 sends over through CAN module 4-2 from CAN network 5, if the speed of a motor vehicle is zero, then gets into step 5); If the speed of a motor vehicle is non-vanishing, then get into step 6);

5) single-chip microcomputer 4-6 controls long-range throttle 2 and Engine ECU 3 gatings through multiway analog switch 4-1, and provides throttle position signal to Engine ECU 3 by long-range throttle 2; Return step 2);

6) single-chip microcomputer 4-6 controls main throttle 1 and Engine ECU 3 gatings through multiway analog switch 4-1, and provides throttle position signal to Engine ECU 3 by main throttle 1; Return step 2);

Behind the program start, abovementioned steps 2) to 6) circular flow.

After adopting aforementioned control program of the present invention; After in case long-range throttle 2 is switch activated; Whether system can switch main throttle 1 and long-range throttle 2 according to procedure judges, and this has ensured the Security of vehicle with regard to having been avoided causing because of driver's misoperation the possibility of error action of device.

Intelligent remote throttle switching controller based on the CAN bus of the present invention need not the throttle selector switch and just can discern the throttle of operating automatically; And through gathering the speed of a motor vehicle; Use certain determination strategy to select main throttle or long-range throttle; Thereby the minimizing cost, installation, easy to operate increases traveling security.

Claims

1. intelligent remote throttle switching controller based on the CAN bus, it is characterized in that: it is made up of main throttle (1), long-range throttle (2), Engine ECU (3), long-range throttle switching controller (4), CAN network (5) and onboard instruments (6); The parallel long-range throttle switching controller (4) that inserts of main throttle (1), long-range throttle (2) and Engine ECU (3) three; Communicate through CAN network (5) between long-range throttle switching controller (4) and the onboard instruments (6);

Onboard instruments (6) transfers to long-range throttle switching controller (4) through CAN network (5) with GES;

Long-range throttle switching controller (4) is controlled gating or disconnection between main throttle (1) and long-range throttle (2) and the Engine ECU (3) according to GES, main throttle (1) position signal and long-range throttle (2) position signal.

2. the intelligent remote throttle switching controller based on the CAN bus according to claim 1 is characterized in that: said long-range throttle switching controller (4) is made up of multiway analog switch (4-1), CAN module (4-2), A/D module (4-5) and single-chip microcomputer (4-6); Multiway analog switch (4-1), CAN module (4-2) and A/D module (4-5) three are connected with single-chip microcomputer (4-6);

Single-chip microcomputer (4-6) raises from CAN network (5) through CAN module (4-2) and fetches data;

Single-chip microcomputer (4-6) is through gating or disconnection between multiway analog switch (4-1) control main throttle (1) and long-range throttle (2) and the Engine ECU (3);

Single-chip microcomputer (4-6) is gathered main throttle (1) position signal and long-range throttle (2) position signal through A/D module (4-5).

3. intelligent remote throttle switching control method based on the CAN bus, it is characterized in that: this controlling method step is:

1) program initialization;

2) single-chip microcomputer (4-6) is gathered main throttle (1) position signal through A/D module (4-5), gets into step 3) if the A/D transformation result of main throttle (1) position signal is zero; If the A/D transformation result of main throttle (1) position signal is non-vanishing, then get into step 6);

3) single-chip microcomputer (4-6) is gathered long-range throttle (2) position signal through A/D module (4-5), if the A/D transformation result of long-range throttle (2) position signal is zero, then gets into step 6); If the A/D transformation result of long-range throttle (2) position signal is non-vanishing, then get into step 4);

4) single-chip microcomputer (4-6) obtains the GES that onboard instruments (6) sends over through CAN module (4-2) from CAN network (5), if the speed of a motor vehicle is zero, then gets into step 5); If the speed of a motor vehicle is non-vanishing, then get into step 6);

5) single-chip microcomputer (4-6) is controlled long-range throttle (2) and Engine ECU (3) gating through multiway analog switch (4-1), and provides throttle position signal to Engine ECU (3) by long-range throttle (2); Return step 2);

6) single-chip microcomputer (4-6) is controlled main throttle (1) and Engine ECU (3) gating through multiway analog switch (4-1), and provides throttle position signal to Engine ECU (3) by main throttle (1); Return step 2);

Behind the program start, abovementioned steps 2) to 6) circular flow.