CN104895688A - Passenger car engine idling control method and system - Google Patents
Passenger car engine idling control method and system Download PDFInfo
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- CN104895688A CN104895688A CN201510186463.6A CN201510186463A CN104895688A CN 104895688 A CN104895688 A CN 104895688A CN 201510186463 A CN201510186463 A CN 201510186463A CN 104895688 A CN104895688 A CN 104895688A
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Abstract
The invention discloses a passenger car engine idling control method and system and relates to the field of vehicle-mounted equipment. Upon an idling state of an engine, generating power or generating currents of a generator can be detected in real time by an instrument bus system; a comparison between the generating voltage or the generating currents and charging voltage for a storage battery or required total currents by each electric equipment via a micro-processor to determine whether idling rotating speed of the engine is excessive high or excessive low; an order is transmitted to an engine ECU by the micro-processor via a CAN bus; and relative adjustments are made to the engine idling rotating speed by the engine ECU. The beneficial effects of the passenger car engine idling control method and system are that real-time adjustments can be made to engine idling rotating speed to ensure the engine idling speed at a proper state with guaranteeing passenger car overall power supply volume; and the passenger car engine idling control method and system is advantaged by real-time adjustments to engine idling rotating speed, avoidance of passenger car flameout and fuel consumption reduction.
Description
Technical field
The invention relates to mobile unit field, more specifically a kind of bus engine idle speed control and system.
Background technique
Idling mode refers to a kind of working condition during race of engine.In real life, the too low meeting of engine idle makes automobile occur flame-out phenomenon when temporary parking (as parking during red light, automobile turning, deceleration).And if engine idle is too high, then can increase the consumption of fuel, engine operating temperature is raised, the wearing and tearing of booster engine, and also there will be greater impact sound when speed-change and gearshift, large to automobile infringement.Therefore, idling must be adjusted in suitable scope, guarantee automobilism steadily and extend the operating life of motor.
Due to passenger vehicle berthing time length, stop often, cause the engine idle accounting of passenger vehicle high.For fuel-economizing during guarantee bus engine idling, general engine idle all keeps the comparatively slow-speed of revolution.Electrical power generators voltage can be dragged down when passenger vehicle opens air-conditioning or other large electric appliances, make electrical power generators quantity not sufficient, now need the idling speed improving motor to increase the generated energy of motor to meet the need for electricity of air-conditioning or other electrical equipment.Traditional passenger vehicle idling lifting mode is: when turning on the aircondition or use large electric appliances, by vehicle body circuit to motor idling lifting signal, motor is by the rotating speed automatic lifting set.There is following problem in this idling lifting mode: the idling speed of raising can only have one grade, whether meet current idling power consumption to estimate according to former experience, have that idling lifting is too high, oil consumption be large, or idling lifting not, the generated energy still problem such as not enough.
Summary of the invention
The invention provides a kind of bus engine idle speed control and system, object is to solve existing passenger vehicle idling lifting mode, and to there is idle inaccurate, causes idling lifting too high, increase oil consumption, or idling lifting is inadequate, generated energy is the problem such as not enough still.
The invention adopts following technological scheme:
A kind of bus engine idle speed control, comprises the following steps:
Whether S1, detection motor are in idling mode, then perform step S1 if not, if then perform step S2;
The generating voltage of S2, detection generator, and the charging voltage of itself and storage battery is contrasted, if generating voltage is lower than charging voltage, perform step S3, if generating voltage equals charging voltage, perform step S4, if generating voltage is higher than charging voltage, perform step S5;
S3, lifting engine idle rotational, and perform step S2;
S4, maintenance engine idle rotational, and perform step S1:
S5, reduction engine idle rotational, and perform step S2.
Further, in above-mentioned steps S3, promote engine idle rotational with 25r/min ~ 35r/min.
Further, in above-mentioned steps S3, promote engine idle rotational with 30r/min.
Further, in above-mentioned steps S5, reduce engine idle rotational with 25r/min ~ 35 r/min.
Further, in above-mentioned steps S5, reduce engine idle rotational with 30r/min.
Further, in above-mentioned steps S1, at the end of engine idle conditions being detected, engine idle rotational is returned to predefined value.
A kind of bus engine Wo 2009051153, comprises the meter bus system for detecting passenger vehicle electrical system voltage and electric current, for controlling Engine ECU and microprocessor, motor and the generator of motor; Wherein meter bus system is connected with generator, storage battery, consumer, and microprocessor is connected with meter bus system, Engine ECU.
Further, above-mentioned control system also comprises CAN, and above-mentioned microprocessor is connected by CAN with between Engine ECU.
From the above-mentioned description to the invention structure, the invention tool has the following advantages:
In one, the invention, when motor is in idling mode, by detecting the generating voltage of generator in real time, and the charging voltage of itself and storage battery is contrasted, judge that engine idle rotational is too high or too low with this, and corresponding adjustment is made to engine idle rotational.The invention can adjust in real time to engine idle rotational, under the prerequisite ensureing passenger vehicle bulk supply amount, make engine idle rotational be in proper states, have can regulate engine idle rotational in real time, avoid passenger vehicle flame-out, lower the advantages such as fuel consumption.
Two, in the invention, promote with 25r/min ~ 35r/min or reduce engine idle rotational, both the pace of change of generator can have been ensured, supplement the need for electricity of passenger vehicle consumer as soon as possible, prevent discharged or defective battery or passenger vehicle from stopping working, the validity that engine idle rotational regulates can be ensured again.
Three, in the invention, this control system comprises meter bus system for detecting passenger vehicle electrical system voltage and electric current, for controlling Engine ECU and microprocessor, motor and the generator of motor.Make full use of passenger vehicle existing equipment and function thereof to form this control system, make the cost of this control system low, practical.Wherein pass through CAN move instruction between microcontroller and Engine ECU, to ensure that this control system has outstanding reliability, real-time and flexibility.
Accompanying drawing explanation
Fig. 1 is the controlling method schematic flow sheet of the invention;
Fig. 2 is the Control system architecture schematic diagram of the invention;
Fig. 3 is the schematic flow sheet of current vs's method.
Embodiment
The embodiment of the invention is described with reference to the accompanying drawings.
As Fig. 1 and Fig. 2, a kind of bus engine idle speed control and system, this control system comprises generator 1, meter bus system 2, microprocessor 3, storage battery 4, CAN 5, Engine ECU 6 and motor 7.Meter bus system 2 is connected with storage battery 4, generator 1, microprocessor 3, each consumer 8; Microprocessor 3 is connected with Engine ECU 6 by CAN 5; Engine ECU 6 is connected with motor 7.Wherein meter bus system 2 detects electrical system voltage and the electric current of passenger vehicle, the desired datas such as the generating voltage of acquisition generator 1 and generation current; Obtained data are delivered to microprocessor 3 and are analyzed by meter bus system 2; By analysis, result is delivered to Engine ECU 6 by CAN 5, by the idling speed of engine ECU controls engine 7 by microprocessor 3.
The concrete controlling method of this control system comprises the following steps:
S1, by gear detector detect passenger vehicle whether be in neutral gear or park, if then judge that this motor 7 is in idling mode, perform step S2; Then judge that this motor is not be in idling mode if not, and perform step S1; At the end of engine idle conditions being detected, control to make the idling speed of motor 7 return to predefined value by Engine ECU 6, and perform step S1.
S2, detected the electrical system voltage of passenger vehicle by meter bus system 2, and the generating voltage numerical value of generator 1 is delivered to microprocessor 3.(output voltage of usual storage battery 4 is 24V, namely thinks can charge by accumulators 4 higher than this voltage to be preset with the charging voltage numerical value of storage battery 4 in microprocessor 3.In order to protect storage battery 4, the charging voltage of storage battery 4 should not be 28.8V higher than 1.2 of its output voltage times, and therefore the charging voltage of storage battery 4 between 24V to 28.8V, should be set to 27.6V usually).The generating voltage of generator 1 and storage battery 4 charging voltage contrast by microprocessor 3.If generating voltage is lower than charging voltage, perform step S3, if generating voltage equals charging voltage, perform step S4, if generating voltage is higher than charging voltage, perform step S5.
Comparing result is sent to Engine ECU 6 by CAN 5 by S3, microprocessor 3, and controls motor 7 with 25r/min ~ 35r/min lifting idling speed by Engine ECU 6, preferred 30r/min, and performs step S2;
Comparing result is sent to Engine ECU 6 by CAN 5 by S4, microprocessor 3, and controls motor 7 by Engine ECU 6 and keep engine idle rotational, and performs step S1:
Comparing result is sent to Engine ECU 6 by CAN 5 by S5, microprocessor 3, and controls motor 7 with 25r/min ~ 35r/min reduction idling speed by Engine ECU 6, preferred 30r/min, and performs step S2.
It should be noted that, the idling speed of motor is not unconfined adjustment, and it has most ceiling value and minimum limit value.Therefore, step S3 and S5 regulate the regulation range that must not to exceed this minimum limit value during the idling speed of motor and define with most ceiling value.When consumer is too much, when institute's subfam. Spiraeoideae is excessive, even if the idling speed of motor to be adjusted to institute's subfam. Spiraeoideae that most ceiling value also cannot meet consumer.For this situation, this control system is also provided with warning function: when the idling speed of motor is close to most ceiling value, and this control system can automatic alarm, to remind operator's closed portion consumer.
When motor is in idling mode, by detecting the generating voltage of generator in real time, and the charging voltage of itself and storage battery being contrasted, judging that engine idle rotational is in too high or too low state with this; By Engine ECU, corresponding adjustment is made to engine idle rotational again.Therefore the invention can adjust in real time to engine idle rotational, overcome because of consumer increase after the electrical power generators quantity not sufficient that caused by dragging down of electrical power generators voltage, passenger vehicle is the problem such as flame-out easily.Make the generating voltage of generator during engine idle keep equal with the charging voltage of storage battery as far as possible, avoid discharged or defective battery, and make engine idle rotational be in lower state.In sum, the invention have can regulate engine idle rotational in real time, avoid passenger vehicle flame-out, lower the advantages such as fuel consumption.By CAN move instruction between microcontroller and Engine ECU, this control system is made to have outstanding reliability, real-time and flexibility.
As described in Fig. 2 and Fig. 3, similar with said method, also can adjust engine idle rotational by detecting correlated current, concrete steps are as follows:
A1, by gear detector detect passenger vehicle whether be in neutral gear or park, if then judge that this motor 7 is in idling mode, perform steps A 2; Then judge that this motor is not for idling mode if not, and perform steps A 1; And at the end of engine idle conditions being detected, control to make the idling speed of motor 7 return to predefined value by Engine ECU 6.
A2, detected electrical system voltage and the electric current of passenger vehicle by meter bus system 2, detect total current needed for each consumer 8 in real time by meter bus system 2 simultaneously, and generation current and required total current numerical value are delivered to microprocessor 3.Contrasted by microprocessor 3 pairs of generation currents and required total current.Required total current can also obtain in the following ways: the working state being detected each consumer 8 by meter bus system 2 in real time, and the working state of each consumer 8 is delivered to microprocessor 3.The standard operation electric current of the data that microprocessor 3 feeds back according to meter bus system 2 and its each consumer 8 prestored, calculates the required total current of each consumer 8 and contrasts with the generation current of generator 1.If generation current is lower than required total current, perform steps A 3, if generation current equals required total current, perform steps A 4, if generation current is higher than required total current, perform steps A 5.
Comparing result is sent to Engine ECU 6 by CAN 5 by A3, microprocessor 3, and controls motor 7 with 25r/min ~ 35r/min lifting idling speed by Engine ECU 6, preferred 30r/min, and performs steps A 2;
Comparing result is sent to Engine ECU 6 by CAN 5 by A4, microprocessor 3, and controls motor 7 by Engine ECU 6 and keep engine idle rotational, and performs steps A 1:
Comparing result is sent to Engine ECU 6 by CAN 5 by A5, microprocessor 3, and controls motor 7 with 25r/min ~ 35r/min reduction idling speed by Engine ECU 6, preferred 30r/min, and performs steps A 2.
When motor is in idling mode, by detecting the generation current of generator in real time, and total current needed for itself and in running order each consumer being contrasted, judging that engine idle rotational is in too high or too low state with this; By Engine ECU, corresponding adjustment is made to engine idle rotational again.Therefore the invention can adjust in real time to engine idle rotational, overcomes the electrical power generators quantity not sufficient because consumer increase causes, and passenger vehicle is the problem such as flame-out easily.Make the generation current of generator during engine idle keep equal with total current needed for each consumer as far as possible, meet the required power consumption of consumer, avoid discharged or defective battery, and make engine idle rotational be in lower state.In sum, the method and system have equally can regulate engine idle rotational in real time, avoid passenger vehicle flame-out, lower the advantages such as fuel consumption.By CAN move instruction between microcontroller and Engine ECU, this control system is made to have outstanding reliability, real-time and flexibility.
Above are only the embodiment of the invention, but the design concept of the invention is not limited thereto, all changes utilizing this design the invention to be carried out to unsubstantiality, all should belong to the behavior of invading the invention protection domain.
Claims (8)
1. a bus engine idle speed control, is characterized in that: comprise the following steps:
Whether S1, detection motor are in idling mode, then perform step S1 if not, if then perform step S2;
The generating voltage of S2, detection generator, and the charging voltage of itself and storage battery is contrasted, if generating voltage is lower than charging voltage, perform step S3, if generating voltage equals charging voltage, perform step S4, if generating voltage is higher than charging voltage, perform step S5;
S3, lifting engine idle rotational, and perform step S2;
S4, maintenance engine idle rotational, and perform step S1:
S5, reduction engine idle rotational, and perform step S2.
2. a kind of bus engine idle speed control according to claim 1, is characterized in that: in described step S3, promotes engine idle rotational with 25r/min ~ 35 r/min.
3. a kind of bus engine idle speed control according to claim 2, is characterized in that: in described step S3, promotes engine idle rotational with 30 r/min.
4. a kind of bus engine idle speed control according to claim 1, is characterized in that: in described step S5, reduces engine idle rotational with 25r/min ~ 35 r/min.
5. a kind of bus engine idle speed control according to claim 4, is characterized in that: in described step S3, reduces engine idle rotational with 30r/min.
6., according to the arbitrary described a kind of bus engine idle speed control of claim 1-5, it is characterized in that: in described step S1, at the end of engine idle conditions being detected, engine idle rotational is returned to predefined value.
7. adopt as arbitrary in claim 1-6 as described in an a kind of control system of bus engine idle speed control, it is characterized in that: comprise the meter bus system for detecting passenger vehicle electrical system voltage and electric current, for controlling Engine ECU and microprocessor, motor and the generator of motor; Wherein meter bus system is connected with generator, storage battery, consumer, and microprocessor is connected with meter bus system, Engine ECU.
8. the control system of a kind of bus engine idle speed control according to claim 7, it is characterized in that: also comprise CAN, described microprocessor is connected by CAN with between Engine ECU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510186463.6A CN104895688A (en) | 2015-04-20 | 2015-04-20 | Passenger car engine idling control method and system |
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| CN201510186463.6A CN104895688A (en) | 2015-04-20 | 2015-04-20 | Passenger car engine idling control method and system |
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Cited By (6)
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| CN106080451A (en) * | 2016-07-28 | 2016-11-09 | 上汽通用汽车有限公司 | Method of supplying power to and device under a kind of idling operation |
| CN107630758A (en) * | 2016-07-18 | 2018-01-26 | 上海汽车集团股份有限公司 | The control method and control device of engine idle rotational |
| CN108189707A (en) * | 2017-12-20 | 2018-06-22 | 北京福田戴姆勒汽车有限公司 | Control method, control system and the vehicle of vehicle |
| CN109519287A (en) * | 2017-09-19 | 2019-03-26 | 郑州宇通客车股份有限公司 | A kind of Eng ine Idling Control method, system and vehicle |
| CN111365135A (en) * | 2020-03-21 | 2020-07-03 | 东风汽车集团有限公司 | Idle speed target rotating speed control method |
| CN114458464A (en) * | 2020-11-10 | 2022-05-10 | 长城汽车股份有限公司 | Engine idle speed compensation method and device, electronic equipment and storage medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630758A (en) * | 2016-07-18 | 2018-01-26 | 上海汽车集团股份有限公司 | The control method and control device of engine idle rotational |
| CN107630758B (en) * | 2016-07-18 | 2020-05-01 | 上海汽车集团股份有限公司 | Method and device for controlling idle speed of engine |
| CN106080451A (en) * | 2016-07-28 | 2016-11-09 | 上汽通用汽车有限公司 | Method of supplying power to and device under a kind of idling operation |
| CN109519287A (en) * | 2017-09-19 | 2019-03-26 | 郑州宇通客车股份有限公司 | A kind of Eng ine Idling Control method, system and vehicle |
| CN108189707A (en) * | 2017-12-20 | 2018-06-22 | 北京福田戴姆勒汽车有限公司 | Control method, control system and the vehicle of vehicle |
| CN111365135A (en) * | 2020-03-21 | 2020-07-03 | 东风汽车集团有限公司 | Idle speed target rotating speed control method |
| CN111365135B (en) * | 2020-03-21 | 2021-05-28 | 东风汽车集团有限公司 | Idle speed target rotating speed control method |
| CN114458464A (en) * | 2020-11-10 | 2022-05-10 | 长城汽车股份有限公司 | Engine idle speed compensation method and device, electronic equipment and storage medium |
| CN114458464B (en) * | 2020-11-10 | 2023-03-24 | 长城汽车股份有限公司 | Engine idle speed compensation method and device, electronic equipment and storage medium |
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Application publication date: 20150909 |