CN102425522B

CN102425522B - Protective control system and method of vehicle starting engine

Info

Publication number: CN102425522B
Application number: CN 201110277450
Authority: CN
Inventors: 李蕊; 赵国华
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2011-09-19
Filing date: 2011-09-19
Publication date: 2013-04-10
Anticipated expiration: 2031-09-19
Also published as: CN102425522A

Abstract

The invention discloses a protective control system and method of a vehicle starting engine. The system is provided with a rotating speed sensor for monitoring the rotating speed of a starter; a monitored rotating speed signal is transmitted to an engine control module; an ignition switch and a starter control module are connected in series to a coil end loop of a starting relay; the engine control module is used for controlling the switch-on/off of the coil end loop of the starting relay according to the rotating speed of the engine; and a normally-open contact at the control end of the starting relay accesses a relay loop of the starter, and is used for controlling the switch-on/off of the relay loop. Due to the adoption of the system and the method, the technical blank of starter protection is filled up; and moreover, a circuit has a simple structure and is easy to realize and popularize, the entire vehicle performance is enhanced, the damage rate of the starter is lowered, the working service life of the starter is prolonged, and the maintenance cost on a vehicle is lowered for a user.

Description

A kind of Protection control system of vehicle starter and controlling method thereof

Technical field

The present invention relates to vehicle launch Protection control system and controlling method thereof.

Background technique

Reprocess after sale data according to vehicle and show, in the fault of starter motor, the starter motor overload is ablated and is occupied larger proportion, is about 30%～50%.And the reason that causes fault mainly is because user's improper operation, the key return causes starter motor by towing astern late after mainly containing startup, or misoperation turns key damage starter gear during engine idle, and the situation such as the low starting time of winter environment temperature is long, cause the starter motor overload to be ablated.And vehicle launch surmounts the abnormal sound problem, and namely starter gear does not have timely return, and the anti-starter motor High Rotation Speed that drags behind the engine start produces abnormal sound, can affect like this travelling comfort of vehicle, causes being discontented with of user.For the problems referred to above, automobile production manufacturer does not also have good solution at present.

Summary of the invention

Technical problem to be solved by this invention is the control system that realizes that a kind of protection starting machine avoids gear destruction or overload to ablate, and the method for utilizing this system protection starter motor.

To achieve these goals; the technical solution used in the present invention is: a kind of Protection control system of vehicle starter; this system is provided with the speed probe for monitoring starter motor rotating speed; and with the monitoring tach signal be delivered to engine control module; ignition switch and engine control module are series at starter relay coil-end loop; described engine control module is according to starter motor rotating speed control starter relay coil-end loop break-make, and the relay circuit of the control end normally opened contact access starter motor of described starter relay is also controlled its keying.

This system also is provided with timer, and described engine control module is according to the timer control starter motor operating time.

This system also is provided with temperature transducer, and the temperature signal of monitoring is delivered to engine control module, and described engine control module is adjusted restriction rotating speed and the binding hours of motor according to ambient temperature.

Systemic presupposition engine limitations rotating speed, when motor was in flameout state, starter motor was started working after the igniting, monitor simultaneously the starter motor rotating speed, when the starter motor rotating speed reached the restriction rotating speed, engine control module was cut off starter relay coil-end loop, and starter motor is quit work; When being in idling or normal working when motor, engine control module makes starter relay coil-end loop be in turnoff state.

System also is provided with binding hours, and when the starter motor continuous operation surpasses binding hours, engine control module is cut off starter relay coil-end loop, forces starter motor to quit work.

The system acquisition ambient temperature signal limits rotating speed and binding hours, described restriction speed revolution value and binding hours numerical value and the ambient temperature numerical value relation of being inversely proportional to by engine control module according to the ambient temperature adjustment.

Described restriction rotating speed is 400rpm, and described binding hours is 15s.

The invention has the advantages that a technology vacancy of having filled up the starter motor protection, and circuit structure is simple, is easy to realize and promote; improved vehicle performance; reduce the starter motor damage probability, prolonged the work working life of starter motor, reduced the maintenance cost of user to vehicle.

Description of drawings

The below makes brief description to the content of every width of cloth accompanying drawing expression in the specification of the present invention and the mark among the figure:

Fig. 1 is the Protection control system circuit theory diagrams of vehicle starter

Mark among the above-mentioned figure is: 1, temperature transducer; 2, speed probe; 3, timer; 4, engine control module; 5, ignition switch; 6, starter relay; 7, starter motor.

Embodiment

Referring to Fig. 1 as can be known, the protective system of starter motor mainly comprises temperature transducer 1, speed probe 2, timer 3, engine control module 4, ignition switch 5, starter relay 6 and starter motor 7, speed probe 2 is used for monitoring starter motor 7 rotating speeds, temperature transducer 1 is used for the monitoring of environmental temperature, and two sensors are sent to engine control module 4 in real time with starter motor 7 rotating speeds and temperature signal respectively; Ignition switch 5 is series at starter relay 6 coil-end loops with engine control module 4, the relay circuit of the control end normally opened contact access starter motor 7 of starter relay 6, engine control module 4 inside also are provided with timer 3, are used for the Monitoring and Controlling starter motor operating time.Engine control module 4 is preset with binding hours and restriction rotating speed, and according to the starter motor 7 tach signals control starter relay 6 coil-end loop break-makes of speed probe 2 monitoring, wherein temperature transducer 1 monitoring of environmental temperature signal is delivered to engine control module 4, and engine control module 4 becomes reasonable value with binding hours with the restriction adjustment of rotational speed according to ambient temperature.Wherein limit the limiting value that rotating speed is starter motor 7 rotating speeds, binding hours is the starter motor limiting value of 7 operating times.

Utilize this system that starter motor is protected, its method is specific as follows:

Engine control module 4 presets restriction rotating speed and binding hours, when motor is in flameout state, the driver turns key and goes to ST starting gear when igniting, engine control module 4 is by speed probe 2 monitoring starter motors 7 tach signals, when reaching the restriction rotating speed, starter motor 7 cuts off the coil-end loop of starter relay 6, starter motor 7 outages are quit work, prevent starter motor 7 towing asterns.When motor is in idling or normal working, engine control module 4 makes starter relay 6 coil-end loops be in turnoff state, and when driver's misoperation turned the key startup, starter motor 7 relay circuits still were in turnoff state, can't start starter motor 7, avoid damaging its gear.

Engine control module 4 is preset with binding hours, and monitor by 3 pairs of 7 operating times of starter motor of internal timer, surpass binding hours when 7 operating times of starter motor, engine control module 4 is cut off starter relay 6 coil-end loops, force starter motor 7 to quit work, preventing from working long hours causes that overload ablates.

Usually the restriction rotating speed can be set as 400rpm; and binding hours is set as 15s; but because China is vast in territory; vehicle also is exported to country variant and area; there is larger temperature contrast in the vehicle operation environment; may cause protecting because operating ambient temperature is different poor effect for this setting value; therefore gather ambient temperature signal by temperature transducer 1; limit rotating speed and binding hours by engine control module 4 according to the ambient temperature adjustment; can effectively avoid this problem; specifically can set in engine control module 4 function relation or the respective value table of restriction rotating speed and binding hours and ambient temperature; its restriction speed revolution value and binding hours numerical value and ambient temperature numerical value relation of being inversely proportional to; change with operating ambient temperature, thereby make vehicle can give in different regions starter motor 7 good protection.

Claims

1. the Protection control system of a vehicle starter, it is characterized in that: this system is provided with the speed probe (2) for monitoring starter motor (7) rotating speed, and with the monitoring tach signal be delivered to engine control module (4), ignition switch (5) is series at starter relay (6) coil-end loop with engine control module (4), described engine control module (4) is according to starter motor (7) rotating speed control starter relay (6) coil-end loop break-make, and the relay circuit of the control end normally opened contact access starter motor (7) of described starter relay (6) is also controlled its keying;

This system also is provided with timer (3), and described engine control module (4) is according to timer (3) control starter motor (7) operating time;

This system also is provided with temperature transducer (1), and with the monitoring temperature signal be delivered to engine control module (4), described engine control module (4) is adjusted restriction rotating speed and the binding hours of motor according to ambient temperature, described restriction rotating speed is the limiting value of starter motor (7) rotating speed, and described binding hours is the starter motor limiting value of (7) operating time.

2. a Protection control system that utilizes vehicle starter claimed in claim 1 is to the method for starter motor control: it is characterized in that: systemic presupposition engine limitations rotating speed, when motor is in flameout state, starter motor (7) is started working after the igniting, monitor simultaneously starter motor (7) rotating speed, when starter motor (7) rotating speed reaches the restriction rotating speed, engine control module (4) is cut off starter relay (6) coil-end loop, and starter motor (7) is quit work;

When motor was in idling or normal working, engine control module (4) made starter relay (6) coil-end loop be in turnoff state;

System also is provided with binding hours, and when starter motor (7) continuous operation surpasses binding hours, engine control module (4) is cut off starter relay (6) coil-end loop, forces starter motor (7) to quit work;

The system acquisition ambient temperature signal limits rotating speed and binding hours, described restriction speed revolution value and binding hours numerical value and the ambient temperature numerical value relation of being inversely proportional to by engine control module (4) according to the ambient temperature adjustment.

3. the method for starter motor according to claim 2 control: it is characterized in that: described restriction rotating speed is 400rpm, and described binding hours is 15s.