CN104454187A - Oil and gas dual-purpose fuel switching control method - Google Patents
Oil and gas dual-purpose fuel switching control method Download PDFInfo
- Publication number
- CN104454187A CN104454187A CN201410591248.XA CN201410591248A CN104454187A CN 104454187 A CN104454187 A CN 104454187A CN 201410591248 A CN201410591248 A CN 201410591248A CN 104454187 A CN104454187 A CN 104454187A
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- Prior art keywords
- fuel
- gas
- switch
- fuel ratio
- oil
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Links
- 239000000446 fuel Substances 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003345 natural gas Substances 0.000 claims abstract description 8
- 239000003502 gasoline Substances 0.000 claims description 24
- 239000000567 combustion gas Substances 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000013016 damping Methods 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 5
- 239000003921 oil Substances 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
Classifications
-
- 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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention relates to an oil and gas dual-purpose fuel switching control method which is suitable for switching an oil nozzle and a natural gas nozzle. When a controller receives a switching request instruction, a user determines and waits for the situation that the work of the current nozzles is completed, and then switching is conducted; when the oil nozzle is switched to the natural gas nozzle, the air-fuel ratio is instantly increased and then gradually decreased to the theoretical air-fuel ratio; when the natural gas nozzle is switched to the oil nozzle, the air-fuel ratio is instantly decreased and then gradually increased to the theoretical air-fuel ratio. By means of the control method, the stable working of an engine can be kept during oil and gas switching, and the service life of the engine is not influenced.
Description
Technical field
The present invention relates to the technical field of engine oil pneumatic control, more particularly, the present invention relates to a kind of oil-gas two-way Fuel switching controlling method.
Background technique
In recent years, along with improving constantly of gas price, be that the advantage that dual-fuel automobile is low with its reforming cost, emission performance is superior, user cost is low of main fuel more and more comes into one's own with rock gas.Be at present that the dual-fuel automobile of main fuel or auxiliary fuel has obtained and applies comparatively widely with rock gas.Dual-fuel automobile is on conventional gasoline Electrical Control systemic-function basis, increase fuel gas injection function and define oil-gas two-way fuel electric-control system, conventional gasoline engin add load onto department of fuel gas part just can realize double fuel switch use, reduce gasoline use amount, combustion gas is much lower relative to gas price, also can reach energy-conservation, reduce the object of operation cost.In the prior art, Fuel switching control program is all, when being switched to valve injection immediately when receiving handoff request, can causing engine speed fluctuations, affect driving comfortability; In extreme circumstances, even engine misses may be caused; And cause reduce the working life of motor.
Summary of the invention
In order to solve above-mentioned technical problem of the prior art, the object of the present invention is to provide a kind of oil-gas two-way Fuel switching controlling method.
To achieve these goals, present invention employs following technological scheme:
A kind of oil-gas two-way Fuel switching controlling method, described controlling method is applicable to the switching of petrol jet and rock gas nozzle; And when controller receives handoff request instruction, confirm and wait for that current nozzle switches after hours again; And after being switched to gas nozzle from petrol jet, reduce air fuel ratio immediately, and then be elevated to chemically correct fuel gradually; After being switched to gasoline from rock gas, raise air fuel ratio immediately, and then be returned to chemically correct fuel gradually.
Wherein, described method for handover control comprises the following steps:
(1) judge whether motor meets to switch to require: the petrol jet fault-free judging motor; Oil spout nozzle fault-free; The gentle rail pressure of cylinder pressure is normal; If do not meet and switch requirement, then do not switch;
(2) Fuel switching instruction is received: receive driver command by Fuel switching switch, and send to controller;
(3) wait for that current injection action completes: when controller receives Fuel switching instruction, no matter jet natural gas or spray gasoline during current state, all will wait for and confirm that current nozzle work completes;
(4) fuel is switched: utilize controller to switch fuel nozzle, the fuel after bringing into use instruction to switch from next injection action;
(5) air fuel ratio is adjusted: after being switched to combustion gas from gasoline, raise air fuel ratio immediately; After being switched to gasoline from rock gas, reduce air fuel ratio immediately;
(6) air fuel ratio is transitioned into theoretical value: the chemically correct fuel being returned to normal vehicle operation by certain decay interval and step-length.
Compared with prior art, oil-gas two-way Fuel switching controlling method of the present invention has following beneficial effect:
Adopting method for handover control of the present invention, the work of engine stabilizer can not only be kept when carrying out Fuel switching, and do not affect the working life of motor.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the oil-gas two-way Fuel switching controlling method of embodiment 1.
Fig. 2 is the switching signal of Fuel switching controlling method and the correlogram of engine speed that adopt embodiment 1.
Fig. 3 is the switching signal of Fuel switching controlling method and the correlogram of engine speed that adopt comparative example 1.
Embodiment
Below with reference to specific embodiment, oil-gas two-way Fuel switching controlling method of the present invention is further elaborated, has more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technological scheme.
Embodiment 1
As shown in Figure 1, the oil-gas two-way Fuel switching controlling method described in the present embodiment, comprises the following steps:
(6) judge whether motor meets to switch to require: the petrol jet fault-free judging motor; Oil spout nozzle fault-free; The gentle rail pressure of cylinder pressure is normal; If do not meet and switch requirement, then do not switch;
(7) Fuel switching instruction is received: receive driver command by Fuel switching switch, and send to controller;
(8) wait for that current injection action completes: when controller receives Fuel switching instruction, no matter jet natural gas or spray gasoline during current state, all will wait for and confirm that current nozzle work completes;
(9) fuel is switched: utilize controller to switch fuel nozzle, the fuel after bringing into use instruction to switch from next injection action;
(10) air fuel ratio is adjusted: when gasoline is switched to combustion gas: air fuel ratio raises certain compensation rate, such as combustion gas idling chemically correct fuel 16.4, adds compensation rate 1, air fuel ratio is adjusted to 17.4; Then be multiplied by damping coefficient with compensation rate, interval 5ms decays, and when compensation rate is less than 0.1, air fuel ratio becomes and is adjusted to combustion gas idling chemically correct fuel, namely 16.4; When combustion gas is switched to gasoline: air fuel ratio reduces certain compensation rate; Such as, gasoline idling chemically correct fuel 14.6, then deduct compensation rate 1, air fuel ratio is adjusted to 13.6, is then multiplied by certain damping coefficient with compensation rate, interval 5ms increases, and when compensation rate is less than 0.1, air fuel ratio becomes 14.6.And the temperature correlation of the water temperature of described damping coefficient and motor, and its relation is as shown in table 1:
Table 1
| Water temperature DEG C | -40≤t＜-20 | -20≤t＜0 | 0≤t＜30 | 30≤t＜70 | 70≤t＜120 |
| Damping coefficient | 0.80 | 0.66 | 0.60 | 0.50 | 0.30 |
Fig. 2 gives the engine speed relation in time adopting the method for handover control of the present embodiment to obtain, and wherein said curve represents engine speed; Straightway below curve represents switching signal.
Comparative example 1
The oil-gas two-way Fuel switching controlling method of this comparative example, comprises the following steps:
(1) judge whether motor meets to switch to require: the petrol jet fault-free judging motor; Oil spout nozzle fault-free; The gentle rail pressure of cylinder pressure is normal; If do not meet and switch requirement, then do not switch;
(2) Fuel switching instruction is received: receive driver command by Fuel switching switch, and send to controller;
(3) wait for that current injection action completes: when controller receives Fuel switching instruction, no matter jet natural gas or spray gasoline during current state, all will wait for and confirm that current nozzle work completes;
(4) fuel is switched: utilize controller to switch fuel nozzle, the fuel after bringing into use instruction to switch from next injection action;
(5) air fuel ratio is adjusted: when gasoline is switched to combustion gas: air fuel ratio is adjusted to 16.4; When combustion gas is switched to gasoline: air fuel ratio is adjusted to 14.6.
Fig. 3 gives the engine speed relation in time adopting the method for handover control of this comparative example to obtain, and wherein said curve represents engine speed; Straightway below curve represents switching signal.
As can be seen from the contrast of Fig. 2 and Fig. 3, adopt method of the present invention can keep the work of engine stabilizer when carrying out Fuel switching; Also show, through Fuel switching operation frequently, also can not affect usability and the working life of motor even if test in addition.And adopt the switching method of comparative example 1, not only can not ensure the stable operation of motor, also can reduce the working life of motor.
For the ordinary skill in the art; specific embodiment is just to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technological scheme is carried out; or design of the present invention and technological scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (5)
1. an oil-gas two-way Fuel switching controlling method, described controlling method is applicable to the switching of petrol jet and rock gas nozzle; It is characterized in that: when controller receives handoff request instruction, confirm and wait for that current nozzle switches after hours again; And after being switched to gas nozzle from petrol jet, reduce air fuel ratio immediately, and then be elevated to chemically correct fuel gradually; After being switched to gasoline from rock gas, raise air fuel ratio immediately, and then be returned to chemically correct fuel gradually.
2. oil-gas two-way Fuel switching controlling method according to claim 1, is characterized in that: described method for handover control comprises the following steps:
(1) judge whether motor meets to switch to require: the petrol jet fault-free judging motor; Oil spout nozzle fault-free; The gentle rail pressure of cylinder pressure is normal; If do not meet and switch requirement, then do not switch;
(2) Fuel switching instruction is received: receive driver command by Fuel switching switch, and send to controller;
(3) wait for that current injection action completes: when controller receives Fuel switching instruction, no matter jet natural gas or spray gasoline during current state, all will wait for and confirm that current nozzle work completes;
(4) fuel is switched: utilize controller to switch fuel nozzle, the fuel after bringing into use instruction to switch from next injection action;
(5) air fuel ratio is adjusted: after being switched to combustion gas from gasoline, raise air fuel ratio immediately; After being switched to gasoline from rock gas, reduce air fuel ratio immediately;
(6) air fuel ratio is transitioned into theoretical value: the chemically correct fuel being returned to normal vehicle operation by certain decay interval and step-length.
3. oil-gas two-way Fuel switching controlling method according to claim 1, is characterized in that: described method for handover control comprises the following steps:
(1) judge whether motor meets to switch to require: the petrol jet fault-free judging motor; Oil spout nozzle fault-free; The gentle rail pressure of cylinder pressure is normal; If do not meet and switch requirement, then do not switch;
(2) Fuel switching instruction is received: receive driver command by Fuel switching switch, and send to controller;
(3) wait for that current injection action completes: when controller receives Fuel switching instruction, no matter jet natural gas or spray gasoline during current state, all will wait for and confirm that current nozzle work completes;
(4) fuel is switched: utilize controller to switch fuel nozzle, the fuel after bringing into use instruction to switch from next injection action;
(5) air fuel ratio is adjusted: when gasoline is switched to combustion gas: air fuel ratio raises certain compensation rate Δ, be adjusted to combustion gas idling chemically correct fuel value+Δ by air fuel ratio; Then be multiplied by damping coefficient with compensation rate, interval 5ms decays, and when compensation rate is less than 0.1, air fuel ratio change is adjusted to combustion gas idling chemically correct fuel; When combustion gas is switched to gasoline: air fuel ratio reduces certain compensation rate Δ; Be adjusted to gasoline idling chemically correct fuel-Δ by air fuel ratio, be then multiplied by certain damping coefficient with compensation rate, interval 5ms increases, and when compensation rate is less than 0.1, air fuel ratio is adjusted to gasoline idling chemically correct fuel.
4. oil-gas two-way Fuel switching controlling method according to claim 3, it is characterized in that: combustion gas idling chemically correct fuel is 16.4, gasoline idling chemically correct fuel is 14.6, and compensation rate Δ equals 1.
5. oil-gas two-way Fuel switching controlling method according to claim 4, it is characterized in that: the temperature correlation of described damping coefficient and the water temperature of motor, and its relation is as shown in table 1:
Table 1
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410591248.XA CN104454187A (en) | 2014-10-29 | 2014-10-29 | Oil and gas dual-purpose fuel switching control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410591248.XA CN104454187A (en) | 2014-10-29 | 2014-10-29 | Oil and gas dual-purpose fuel switching control method |
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| Publication Number | Publication Date |
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| CN104454187A true CN104454187A (en) | 2015-03-25 |
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| CN201410591248.XA Pending CN104454187A (en) | 2014-10-29 | 2014-10-29 | Oil and gas dual-purpose fuel switching control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513274A (en) * | 2016-01-27 | 2016-04-20 | 湖州杰盛高科纺织有限公司 | Stocking capable of giving out alarm |
| CN108138664A (en) * | 2015-09-16 | 2018-06-08 | 洋马株式会社 | Engine device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080000457A1 (en) * | 2006-07-03 | 2008-01-03 | Mazda Motor Corporation | Indicator for a vehicle having a dual fuel engine |
| CN101105155A (en) * | 2007-07-11 | 2008-01-16 | 华夏龙晖（北京）汽车电子科技有限公司 | Engine oil gas mixing ECU control method |
| CN102562334A (en) * | 2010-12-14 | 2012-07-11 | 北汽福田汽车股份有限公司 | System and method for combustion control of duel fuel engine |
| CN102656353A (en) * | 2010-03-19 | 2012-09-05 | 丰田自动车株式会社 | Control device for internal combustion engine |
| CN102906397A (en) * | 2010-05-18 | 2013-01-30 | 铃木株式会社 | Fuel supply device and method for internal combustion engine |
-
2014
- 2014-10-29 CN CN201410591248.XA patent/CN104454187A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080000457A1 (en) * | 2006-07-03 | 2008-01-03 | Mazda Motor Corporation | Indicator for a vehicle having a dual fuel engine |
| CN101105155A (en) * | 2007-07-11 | 2008-01-16 | 华夏龙晖（北京）汽车电子科技有限公司 | Engine oil gas mixing ECU control method |
| CN102656353A (en) * | 2010-03-19 | 2012-09-05 | 丰田自动车株式会社 | Control device for internal combustion engine |
| CN102906397A (en) * | 2010-05-18 | 2013-01-30 | 铃木株式会社 | Fuel supply device and method for internal combustion engine |
| CN102562334A (en) * | 2010-12-14 | 2012-07-11 | 北汽福田汽车股份有限公司 | System and method for combustion control of duel fuel engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108138664A (en) * | 2015-09-16 | 2018-06-08 | 洋马株式会社 | Engine device |
| CN105513274A (en) * | 2016-01-27 | 2016-04-20 | 湖州杰盛高科纺织有限公司 | Stocking capable of giving out alarm |
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Application publication date: 20150325 |