CN209747414U - intelligent control system of automobile eddy current retarder - Google Patents
intelligent control system of automobile eddy current retarder Download PDFInfo
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- CN209747414U CN209747414U CN201920842911.7U CN201920842911U CN209747414U CN 209747414 U CN209747414 U CN 209747414U CN 201920842911 U CN201920842911 U CN 201920842911U CN 209747414 U CN209747414 U CN 209747414U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model provides an intelligent control system of an automobile eddy current retarder, which comprises a controller, a power supply circuit, a control signal input circuit, a solenoid control circuit, a coil temperature detection circuit, a light and sound alarm circuit, an accelerator signal acquisition circuit, a brake signal acquisition circuit, a function setting key, a LED nixie tube display circuit and a retarder; the utility model provides an intelligent control system of an automobile eddy current retarder, which respectively detects each electromagnetic coil of the retarder by arranging a coil temperature detection circuit; the device is provided with a coil current detection circuit to realize overcurrent protection of the electromagnetic coil, an output relay contact adhesion detection circuit to detect the working state of the relay contact in real time, and a light and sound alarm circuit and an LED nixie tube display circuit to realize light and sound alarm and display fault codes.
Description
Technical Field
the utility model relates to an eddy current retarder field, in particular to car eddy current retarder intelligence control system.
background
with the development of social economy, the safety requirement of automobile products is improved, and the auxiliary brake of assembly is required for high-grade passenger cars in China from 2002. The Chinese national standardization administration committee issues regulation in GB 7258 Motor vehicle safety operation technical Condition, which is issued in 2012: passenger cars (school cars with the car length of 8 meters) with the car length of more than 9m, trucks and special operation cars with the total mass of more than or equal to 12000Kg, and all dangerous goods transport vehicles are required to be equipped with a retarder or other auxiliary braking devices. At present, the electric eddy current retarder is generally adopted as an auxiliary braking device in the domestic passenger car industry. The conventional relay control (also solid state relay control) is generally adopted in the current eddy current retarder on the domestic market, however, the current eddy current retarder basically only has one low-speed turn-off control function single-point temperature control, and the whole system stops working after a loop electromagnetic coil goes wrong, so that the requirement of high safety is difficult to meet.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects mentioned in the prior art, the utility model provides an intelligent control system of an automobile eddy current retarder, which comprises a controller, a power circuit, a control signal input circuit, a solenoid control circuit, a coil temperature detection circuit, a light and sound alarm circuit, an accelerator signal acquisition circuit, a function setting key and an LED nixie tube display circuit; the retarder comprises four groups of electromagnetic coils;
The power supply circuit, the control signal input circuit, the electromagnetic coil control circuit, the coil temperature detection circuit, the light and sound alarm circuit, the accelerator signal acquisition circuit, the function setting key and the LED nixie tube display circuit are all connected with the controller;
The control signal input circuit is used for inputting a retarder control signal; the electromagnetic coil control circuit is used for controlling the work or the non-work of each group of electromagnetic coils; the light and sound alarm circuit is used for realizing light and sound alarm; the coil temperature detection circuit is used for detecting the temperature of each electromagnetic coil; the throttle signal acquisition circuit is used for detecting the position of a throttle; the function setting key is used for selecting a preset working mode in the controller; the LED nixie tube display circuit is used for displaying information.
Further, the control signal input circuit comprises a handle switch and a foot brake linkage pressure switch; the handle switch comprises a plurality of sub-switches connected in parallel, and each sub-switch corresponds to a working gear of the retarder respectively; the foot brake linkage pressure switch is connected with the handle switch in parallel.
Further, the electromagnetic coil control circuit comprises coil control relays in one-to-one correspondence with the electromagnetic coils; the contact of each coil control relay is respectively connected in series with the power supply loop of each electromagnetic coil; the coil control relay is controlled by the controller.
Furthermore, the coil temperature detection circuit comprises temperature sensors in one-to-one correspondence with the electromagnetic coils, and output ends of the temperature sensors are connected with the controller.
Furthermore, the light and sound alarm circuit comprises an indicator light and a buzzer; the indicator light and the buzzer are both controlled by the controller.
Further, the throttle signal acquisition circuit comprises a throttle position detection sensor; the throttle position detection sensor is connected with the controller.
Further, the device also comprises a contact adhesion detection circuit; the contact adhesion detection circuit is used for detecting whether the contacts of the coil control relays are adhered or not; the contact adhesion detection circuit comprises an exclusive-OR gate; one input end of the exclusive-OR gate is connected to a common end of the contact of the coil control relay and the electromagnetic coil, and the other input end of the exclusive-OR gate is connected to a coil control loop of the coil control relay.
The vehicle speed detection device further comprises a constant speed control circuit, wherein the constant speed control circuit comprises a vehicle speed detection sensor used for detecting the running speed of a real-time vehicle, and the vehicle speed detection sensor is connected with the controller.
further, the device also comprises a coil current detection circuit; the coil current detection circuit comprises current transformers which correspond to the electromagnetic coils one by one; the current transformer is arranged on a power supply loop of the electromagnetic coil; and the output end of the current transformer is connected with the controller.
further, the device also comprises a direct current contactor and an auxiliary relay for driving the direct current contactor to work; the direct current contactor is connected in series with a main loop of the retarder; the auxiliary relay is controlled by the controller.
Compared with the prior art, the intelligent control system for the automobile eddy current retarder detects each electromagnetic coil of the retarder respectively by arranging the coil temperature detection circuit, and switches the working electromagnetic coil when the temperature of the electromagnetic coil is overhigh, so that the damage of the electromagnetic coil caused by overhigh temperature is avoided; by arranging the accelerator signal acquisition circuit, when detecting that a driver steps on an accelerator to accelerate, the retarder is automatically stopped; the phenomenon that the driver forgets to turn off a handle switch for starting the retarder and the retarder is accelerated and braked is avoided; meanwhile, a coil current detection circuit is arranged to realize overcurrent protection of the electromagnetic coil, and a light and sound alarm circuit and an LED nixie tube display circuit are arranged to realize light and sound alarm and display fault codes; meanwhile, the system automatically adopts a corresponding control strategy according to the fault phenomenon, so that the auxiliary braking function of the retarder is ensured to the maximum extent, and the driving safety is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of the intelligent control system of the automotive eddy current retarder according to the present invention;
Fig. 2 is a schematic diagram of a controller circuit provided by the present invention;
Fig. 3 is a schematic diagram of a power supply circuit provided by the present invention;
fig. 4 is a schematic diagram of a control signal input circuit provided by the present invention;
Fig. 5 is a schematic diagram of a coil temperature detection circuit provided by the present invention;
Fig. 6 is a schematic diagram of a display circuit of an LED nixie tube provided by the present invention;
fig. 7 is a schematic diagram of the solenoid control circuit and the contact adhesion detection circuit provided by the present invention;
fig. 8 is a schematic diagram of a CAN bus communication circuit provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The use of "first," "second," and similar terms in the embodiments of the invention do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. "one end," "the other end," and the like are used solely to indicate that a device or element is oriented or positioned in a particular manner based on the orientation or position illustrated in the drawings and are not intended to indicate or imply that the device or element so referred to must have the particular orientation, be constructed and operated in the particular manner. The word "comprising" or "comprises", and the like, means that the element or item preceding the word covers the element or item listed after the word and its equivalents, but not the other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As shown in fig. 1-8, an embodiment of the present invention provides an intelligent control system for an automotive eddy current retarder, which includes a controller, a power circuit, a control signal input circuit, a solenoid control circuit, a coil temperature detection circuit, a light and sound alarm circuit, an accelerator signal acquisition circuit, a function setting key, and an LED nixie tube display circuit; the retarder comprises four groups of electromagnetic coils;
The power supply circuit, the control signal input circuit, the electromagnetic coil control circuit, the coil temperature detection circuit, the light and sound alarm circuit, the accelerator signal acquisition circuit, the function setting key and the LED nixie tube display circuit are all connected with the controller;
The control signal input circuit is used for inputting a retarder control signal; the electromagnetic coil control circuit is used for controlling the work or the non-work of each group of electromagnetic coils; the light and sound alarm circuit is used for realizing light and sound alarm; the coil temperature detection circuit is used for detecting the temperature of each electromagnetic coil; the throttle signal acquisition circuit is used for detecting the position of a throttle; the function setting key is used for selecting a preset working mode in the controller; the LED nixie tube display circuit is used for displaying information.
Specifically, as shown in fig. 1, an embodiment of the present invention provides an intelligent control system for an automotive eddy current retarder, which includes a controller, a power circuit, a control signal input circuit, a solenoid control circuit, a coil temperature detection circuit, a light and sound alarm circuit, an accelerator signal acquisition circuit, a function setting key, a LED nixie tube display circuit, and a retarder; wherein, the retarder controlled by the utility model is provided with at least two groups of electromagnetic coils; the controller is used for processing feedback information from other circuits and sending control instructions to control the electromagnetic coil control circuit, the light and the sound alarm circuit and the like to work correspondingly; in the embodiment of the utility model, the controller is a singlechip with the model number of AT89C 52;
The power supply module is used for converting 24V voltage of an automobile into stable voltage required by working devices such as a controller in the control system; as shown in fig. 3, in the embodiment of the present invention, the power module includes a voltage stabilizing chip LM2696, an input end of the voltage stabilizing chip is connected to a 24V dc power supply of the automobile, and an output end of the voltage stabilizing chip outputs a +5V dc power supply;
As shown in fig. 2, the light and sound alarm circuit includes an indicator light and a buzzer; the indicator light and the buzzer can work according to a control instruction sent by the controller so as to realize light and sound alarm; the LED nixie tube display circuit is connected with the controller and used for displaying corresponding information according to instructions sent by the controller, such as system setting parameter codes, parameter codes and fault codes, realizing a human-computer field visual conversation function, realizing accurate setting and adjustment on product use, and the LED nixie tube can be externally arranged through a plug connector; the function setting key is used for setting the controller so as to select a preset working mode in the controller.
The control signal input circuit is used for inputting a retarder control signal, and as shown in fig. 4, the control signal input circuit comprises a handle switch and a foot brake linkage pressure switch; the handle switch comprises a plurality of sub-switches connected in parallel, and each sub-switch corresponds to a working gear of a retarder; in the embodiment of the utility model, the handle switch is a gear switch with five selection pins, wherein the selection pin 0 is suspended, namely, neutral; the selection pins 1-4 are respectively connected to the ports P1.0-P1.3 of the controller; specifically, as shown in fig. 4, one end of the handle switch is connected to the vehicle-mounted power supply, the selection pin 1 in the handle switch is connected to the ground line through the diode D1, the resistor R109 and the resistor R105 in sequence, and the common end of the resistor R109 and the resistor R105 is connected to the port P1.0 of the controller; when the selection pin 1 is not conducted, a low level signal is received by a port P1.0 of the controller; when the selection pin 1 is switched on, after the vehicle-mounted power supply is subjected to voltage division through the resistor R109 and the resistor R105, a port P1.0 of the controller can receive a high-level signal; the circuit structure of the selection pins 2-4 of the band switch is the same as that of the selection pin 1, and is not described herein again.
When the handle switch selects to switch on different selection pins, the controller detects that the corresponding port can detect the level signal change, so that the input of different gear control information can be realized, and the controller can selectively control the retarder to work in corresponding gears according to the gear of the handle switch. If the selection pin 1 of the handle switch is conducted, the working mode of selecting the gear 1 is shown, the controller controls 1 electromagnetic coil in the retarder to participate in the work, and when the selection pin 2 of the handle switch is conducted, the working mode of selecting the gear 2 is shown, and the controller controls 2 electromagnetic coils in the retarder to participate in the work.
As shown in fig. 4, the foot brake linkage pressure switch is a pressure switch with 4-gear selection, and can be switched among 4 gears according to different pressures applied to the foot brake linkage pressure switch; the foot brake linkage pressure switch is connected with the handle switch in parallel; the driver applies certain pressure to the foot brake linkage pressure switch by feet, so that different gear selections can be realized, the controller detects that the corresponding port can detect the level signal change, and the input of control information of different gears can be realized; through setting up handle switch and service brake linkage pressure switch, let the driver optional through manual selection retarber operating gear or step on the selection retarber operating gear through the foot, facilitate the use. The handle switch is more convenient to be used on long downhill, and the constant speed function in a certain range is realized by matching with a system program.
As shown in fig. 7, the electromagnetic coil control circuit includes coil control relays (e.g., K1-K4 shown in fig. 7) corresponding to the electromagnetic coils one by one, and it should be noted that other switching elements such as MOS transistors and IGBTs may be used to control the electromagnetic coils; the contact of each coil control relay is respectively connected in series with the power supply loop of the corresponding electromagnetic coil; the coil control relay is controlled by the controller to work; specifically, the controller controls the coil control relay to work through the coil control relay driving circuit, each coil control relay driving circuit comprises a photoelectric coupler for realizing electrical isolation and a triode which is connected in series with the coil control relay control circuit, one pin at the input side of the photoelectric coupler is connected to a port (such as P2.4-P2.7 shown in figure 2) of the single chip microcomputer, and the other pin is connected to the ground wire; one pin of the output side of the photoelectric coupler is connected to a +5V direct-current power supply, the other pin of the output side of the photoelectric coupler is connected to the base electrode of the triode, the emitting electrode of the triode is connected to the ground wire, the collecting electrode of the triode is connected to one end of the coil control relay, and the other end of the coil control relay is connected to the automobile power supply; when the needed electromagnetic coil needs to be controlled to work, when a port corresponding to the controller outputs a high-level signal, the output side of the photoelectric coupler is conducted, the base electrode of the triode is high-level voltage, the triode is conducted, the coil controls the relay to be electrified and work, and the coil controls the relay contact to be closed so as to electrify the corresponding electromagnetic coil to work; when the output of the controller port is a low level signal, the coil control relay does not work, and the corresponding electromagnetic coil is powered off and stops working.
the embodiment of the utility model provides an in, the controller control solenoid adopts alternate mode of operation during operation: specifically, after the system is powered on and starts to work, when the retarder brake is started for the first time, the work sequence of the electromagnetic coils is L1, L2, L3 and L4, namely the electromagnetic coil L1 is preferentially used, and the electromagnetic coils are started from the electromagnetic coil L1 in sequence according to the number of the electromagnetic coils needing to be started; if it is desired to activate 1 solenoid, solenoid L1 is used; if 2 solenoids are required to be activated, solenoid coils L1 and L2 are used. After the first braking is finished and the retarder is restored to the standby state, if a command of starting the retarder is received again, the working sequence of the electromagnetic coils is adjusted to be L4, L3, L2 and L1, namely the electromagnetic coils L4 are preferentially used, and the electromagnetic coils L4 are started in sequence according to the number of the electromagnetic coils needing to be started; if it is desired to activate 1 solenoid, solenoid L4 is used; if 2 solenoids are required to be activated, solenoid coils L4 and L3 are used. Through adopting the mode of working of taking turns, make 4 groups solenoid work number of times balanced relatively, can effectively improve individual solenoid's life, also can make last solenoid that uses can have sufficient time to dispel the heat, effectively reduce solenoid and stator support temperature. The controller controls the number of the started electromagnetic coils and determines according to a gear instruction input by the control signal input circuit.
As shown in fig. 5, the coil temperature detection circuit includes temperature sensors corresponding to the electromagnetic coils one to one, and the temperature sensors are disposed close to the electromagnetic coils to be detected and are used for respectively detecting the real-time temperatures of the electromagnetic coils; the output end of the temperature sensor is connected with the controller; the temperature detection sensor is PT100 or PT 1000; preferably, the output end of the temperature sensor is connected with the controller through an operational amplifier, and the output signal of the temperature sensor is amplified by the operational amplifier and then sent to the controller. The temperature sensors with the same number as the electromagnetic coils are arranged to monitor the electromagnetic coils respectively, and when the temperature of the electromagnetic coils exceeds a preset value, the controller can control the corresponding electromagnetic coil to stop working and start another electromagnetic coil in an idle state, so that the electromagnetic coils are prevented from being burnt out due to overhigh temperature; if 4 groups of electromagnetic coils are in working state, a gap working mode (the gap time is preset according to the use environment) can be adopted, the working power of the electromagnetic coils is reduced (the working power is reduced by 10% and reduced to 20% at least every time) so as to reduce the temperature of the electromagnetic coils, and light and sound alarm circuits are used for sending light and sound alarm to a driver.
As shown in fig. 2, the throttle signal acquisition circuit includes a throttle position detection sensor; the accelerator position detection sensor is associated with the accelerator pedal, and can be a stroke sensor, a displacement sensor, a pressure sensor and other sensors which can be used for detecting position movement so as to detect whether the accelerator pedal acts; the output end of the accelerator position detection sensor is connected with the controller; preferably, a photoelectric sensor for realizing electrical isolation is arranged between the accelerator position detection sensor and the controller; when in actual use, if the controller detects that a driver steps on an accelerator to accelerate, the retarder power generation magnetic coil is controlled to stop working, the phenomenon that the retarder is mistakenly braked when the vehicle accelerates on a flat road due to the fact that the driver forgets to close the retarder is avoided, so that the phenomenon that the electromagnetic coil is high in temperature, burnt or even caused fire accidents is avoided, meanwhile, a large amount of consumption of a vehicle power supply can be avoided, the aging time of the electromagnetic coil is shortened, and the fuel consumption of the vehicle is effectively reduced. Preferably, when the handle switch is not in the off state, after the acceleration time exceeds 50 seconds (the time can be set through the parameter code), an audible and visual alarm signal is sent to remind the driver.
Preferably, the utility model provides an automobile eddy current retarder intelligence control system still includes the braking signal acquisition circuit, and the braking signal acquisition circuit includes brake position detection sensor, and brake position detection sensor is correlated with brake pedal, and brake position detection sensor can be stroke sensor, displacement sensor, pressure sensor etc. can be used to detect the sensor that the position removed to detect whether brake pedal moves; the output end of the brake position detection sensor is connected with the controller; preferably, a photoelectric sensor for realizing electrical isolation is also arranged between the brake position detection sensor and the controller;
Preferably, the intelligent control system for the automobile eddy current retarder further comprises a contact adhesion detection circuit for detecting whether the contacts of the coil control relays are adhered or not; as shown in fig. 7, the contact adhesion detection circuit includes contact adhesion detection units corresponding to the coil control relays one to one; each contact adhesion detection unit is used for detecting one coil control relay; specifically, as shown in fig. 7, each contact adhesion detecting unit includes a photo coupler; in the embodiment of the utility model, the input side of the photoelectric coupler is connected with the contact loop of the coil control relay to be detected, and the input side of the photoelectric coupler can be specifically connected to the contact of the coil control relay and the common end of the electromagnetic coil; one end of the output side of the photoelectric coupler is connected to a +5V direct current power supply, the other end of the output side of the photoelectric coupler is connected to the ground through a pull-down resistor (R410-R413 shown in figure 7), and meanwhile the output side of the photoelectric coupler is also connected to different ports (P2.0-P2.3 shown in figure 2) of the controller; when the contact of the coil control relay corresponding to the contact adhesion detection unit is in a closed state, current passes through the input side of the photoelectric coupler, the output side of the photoelectric coupler is conducted, and the port of the corresponding controller detects high-level voltage; when the contact of the coil control relay is in a disconnected state, no current passes through the input side of the photoelectric coupler, the output side of the photoelectric coupler is cut off, and the port of the corresponding controller detects low-level voltage;
Therefore, the state of the contact of the corresponding coil control relay can be judged according to the level signal received by the port of the corresponding controller; at this moment, the controller compares the level signal received by the contact adhesion detection circuit with the level signal output to the electromagnetic coil control circuit, and then whether the contact of the coil control relay is adhered or not can be judged: when the level signal output to the electromagnetic coil control circuit is low level and the level signal received by the controller through the contact adhesion detection circuit is high level, the contact adhesion of the coil control relay is judged.
as shown in fig. 7, a dc contactor (K0 shown in fig. 7) is further disposed on the primary circuit of the retarder; the direct current contactor is used as a power supply main switch of all the electromagnetic coils, and when the direct current contactor is disconnected, all the electromagnetic coils are powered off and stop working; the direct current contactor is driven to work by an auxiliary relay (such as K5 shown in figures 2 and 7), the contact of the auxiliary relay is connected in series with a power supply loop of the direct current contactor, and the auxiliary relay is controlled by a controller. Specifically, when the contact adhesion detection circuit detects that the coil controls the relay to generate contact adhesion, the main loop of the retarder can be disconnected through the direct current contactor, the power supply of the electromagnetic coil is cut off, the retarder stops working, meanwhile, a corresponding fault band code is generated and recorded and stored in a memory of the controller, an audible and visual alarm signal is sent out through a light and sound alarm circuit, and a fault code is displayed through an LED nixie tube display circuit; preferably, when the contact adhesion fault is detected, the system turns off the alternate work sequence mode of the retarder solenoid coil, and preferentially uses the solenoid coil controlled by the coil control relay with the adhered contact, for example, when the contact adhesion of the coil control relay K1 is detected, the work sequence of the retarder solenoid coil is switched to: l1, L2, L3, L4; solenoid L1 would be preferred.
Preferably, a manual power main switch is further arranged on the main loop of the retarder and used for manually cutting off the power supply of the retarder.
Preferably, the utility model provides an automobile eddy current retarder intelligence control system still includes constant speed control circuit, constant speed control circuit is including the speed of a motor vehicle detection sensor that is used for detecting real-time vehicle speed of traveling, speed of a motor vehicle detection sensor with the controller is connected. The system automatically takes the speed of the retarder as a reference value at the moment of implementing retarding braking, compares the actual speed of the vehicle detected by the speed detection sensor with the reference speed, and increases the number of electromagnetic coils participating in work through the controller if the actual speed exceeds the reference value, so as to improve the braking effect of the retarder; when the detected actual speed is lower than the reference value, the number of the electromagnetic coils participating in the work is reduced through the controller, and the braking effect of the retarder is reduced. When 4 groups of electromagnetic coils are involved in working and the detected actual speed still exceeds the reference value, the light and sound alarm circuit sends out sound and light alarm to remind a driver to take corresponding measures, such as manual braking through a foot brake. The constant speed function may be selected or turned off by the parameter setting function. It should be noted that if the electromagnetic coil is controlled by a solid-state relay or an IGBT, the constant speed function can be realized by adjusting the PWM pulse width ratio.
Preferably, the intelligent control system for the automobile eddy current retarder further comprises a coil current detection circuit; as shown in fig. 7, the coil current detection circuit includes current transformers corresponding to the electromagnetic coils one to one; the current transformer is arranged on a power supply loop of the electromagnetic coil; the output end of the current transformer is connected with the controller; the controller can detect the current value passing through each electromagnetic coil through the current detection circuit; if the detected current exceeds the set value, the system cuts off the power supply of the group of electromagnetic coils and starts another electromagnetic coil in an idle state, and simultaneously, the system sends out sound-light alarm to remind a driver through the light and the sound alarm circuit.
Preferably, the utility model provides an automobile eddy current retarder intelligence control system still includes operating voltage detection circuitry for whether detecting system's operating voltage is in the within range of setting for (initial settings is 20-29V), if supply voltage surpasss the settlement scope, the system closes the retarder and sends acousto-optic warning through light and signal sound warning circuit simultaneously and reminds the driver, also guarantees the safe in utilization of retarder when protecting the safety of automobile power supply.
preferably, as shown in fig. 8, still include CAN bus communication circuit, CAN bus communication circuit is used for connection controller and vehicle control system, realizes the utility model provides an automobile eddy current retarder intelligent control system and vehicle control system's intercommunication CAN be received information such as speed of a motor vehicle, engine speed, throttle aperture, ABS operating mode, brake signal by whole car CAN network)
Compared with the prior art, the intelligent control system for the automobile eddy current retarder provided by the embodiment of the utility model detects each electromagnetic coil of the retarder respectively by arranging the coil temperature detection circuit, and switches the working electromagnetic coil when the temperature of the electromagnetic coil is overhigh, so as to avoid the damage of the electromagnetic coil caused by overhigh temperature; by arranging the accelerator signal acquisition circuit, when detecting that a driver steps on an accelerator to accelerate, the retarder is automatically stopped; the phenomenon that the driver forgets to turn off a handle switch for starting the retarder and the retarder is accelerated and braked is avoided; meanwhile, a coil current detection circuit is arranged to realize overcurrent protection of the electromagnetic coil, and a light and sound alarm circuit and an LED nixie tube display circuit are arranged to realize light and sound alarm and display fault codes.
Although terms such as controller, retarder, relay, solenoid, LED nixie tube display circuit, temperature sensor, current transformer, throttle signal acquisition circuit, function setting key, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides an automobile eddy current retarder intelligence control system which characterized in that: the system comprises a controller, a power supply circuit, a control signal input circuit, an electromagnetic coil control circuit, a coil temperature detection circuit, a light and sound alarm circuit, an accelerator signal acquisition circuit, a function setting key and an LED digital display circuit; the retarder comprises four groups of electromagnetic coils;
The power supply circuit, the control signal input circuit, the electromagnetic coil control circuit, the coil temperature detection circuit, the light and sound alarm circuit, the accelerator signal acquisition circuit, the function setting key and the LED nixie tube display circuit are all connected with the controller;
the control signal input circuit is used for inputting a retarder control signal; the electromagnetic coil control circuit is used for controlling the work or the non-work of each group of electromagnetic coils; the light and sound alarm circuit is used for realizing light and sound alarm; the coil temperature detection circuit is used for detecting the temperature of each electromagnetic coil; the throttle signal acquisition circuit is used for detecting the position of a throttle; the function setting key is used for selecting a preset working mode in the controller; the LED nixie tube display circuit is used for displaying information.
2. The intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the control signal input circuit comprises a handle switch and a foot brake linkage pressure switch; the handle switch comprises a plurality of sub-switches connected in parallel, and each sub-switch corresponds to a working gear of a retarder respectively; the foot brake linkage pressure switch is connected with the handle switch in parallel.
3. the intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the electromagnetic coil control circuit comprises coil control relays which correspond to the electromagnetic coils one by one; the contact of each coil control relay is respectively connected in series with the power supply loop of each electromagnetic coil; the coil control relay is controlled by the controller.
4. The intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the coil temperature detection circuit comprises temperature sensors which correspond to the electromagnetic coils one by one, and the output ends of the temperature sensors are connected with the controller.
5. The intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the light and sound alarm circuit comprises an indicator light and a buzzer; the indicator light and the buzzer are both controlled by the controller.
6. The intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the throttle signal acquisition circuit comprises a throttle position detection sensor; the throttle position detection sensor is connected with the controller.
7. the intelligent control system for the automotive eddy current retarder according to claim 3, characterized in that: the contact adhesion detection circuit is also included; the contact adhesion detection circuit is used for detecting whether the contacts of the coil control relays are adhered or not; the contact adhesion detection circuit comprises a photoelectric coupler; and the input side of the photoelectric coupler is connected to the contact of the coil control relay and the common end of the electromagnetic coil, and the output side of the photoelectric coupler is connected to the coil control loop of the coil control relay.
8. The intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the vehicle speed detection device is characterized by further comprising a constant speed control circuit, wherein the constant speed control circuit comprises a vehicle speed detection sensor used for detecting the running speed of a real-time vehicle, and the vehicle speed detection sensor is connected with the controller.
9. The intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the coil current detection circuit is also included; the coil current detection circuit comprises current transformers which correspond to the electromagnetic coils one by one; the current transformer is arranged on a power supply loop of the electromagnetic coil; and the output end of the current transformer is connected with the controller.
10. The intelligent control system for the automotive eddy current retarder according to claim 1, characterized in that: the direct current contactor is connected with the power supply, and the auxiliary relay drives the direct current contactor to work; the direct current contactor is connected in series with a main loop of the retarder; the auxiliary relay is controlled by the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920842911.7U CN209747414U (en) | 2019-06-05 | 2019-06-05 | intelligent control system of automobile eddy current retarder |
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| CN201920842911.7U CN209747414U (en) | 2019-06-05 | 2019-06-05 | intelligent control system of automobile eddy current retarder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112498116A (en) * | 2020-11-09 | 2021-03-16 | 温州瑞立科密汽车电子有限公司 | Control method and system for electric retarder of automobile |
| CN112924860A (en) * | 2021-01-27 | 2021-06-08 | 上汽通用五菱汽车股份有限公司 | High-voltage relay adhesion detection circuit and equipment |
| CN113212175A (en) * | 2021-06-08 | 2021-08-06 | 福建省衡驰科技有限公司 | Control device and control method of eddy current retarder for automobile |
-
2019
- 2019-06-05 CN CN201920842911.7U patent/CN209747414U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112498116A (en) * | 2020-11-09 | 2021-03-16 | 温州瑞立科密汽车电子有限公司 | Control method and system for electric retarder of automobile |
| CN112924860A (en) * | 2021-01-27 | 2021-06-08 | 上汽通用五菱汽车股份有限公司 | High-voltage relay adhesion detection circuit and equipment |
| CN113212175A (en) * | 2021-06-08 | 2021-08-06 | 福建省衡驰科技有限公司 | Control device and control method of eddy current retarder for automobile |
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