CN109404143B - Automatic double-power curve selection method for land leveler - Google Patents
Automatic double-power curve selection method for land leveler Download PDFInfo
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- CN109404143B CN109404143B CN201811367743.7A CN201811367743A CN109404143B CN 109404143 B CN109404143 B CN 109404143B CN 201811367743 A CN201811367743 A CN 201811367743A CN 109404143 B CN109404143 B CN 109404143B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
- E02F9/2066—Control of propulsion units of the type combustion engines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Transmission Device (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
The invention provides an automatic double-power curve selection method of a land leveler, which comprises the following steps: setting the state of a power curve, wherein the state of the power curve is divided into a power mode, an energy-saving mode and an automatic mode; when the state of the power curve is in a power mode, setting an engine power selection signal to be in a suspension state; setting an engine power selection signal to a high level when the state of the power curve is in an energy saving mode; when the state of the power curve is in an automatic mode, carrying out logic controlled processing on the engine gear signal, and setting an engine power selection signal according to a processing result; the invention can complete the power curve selection under the automatic mode and the manual mode by matching the logic operation with the state of the power curve, does not need to rely on a controller, optimizes the system structure and saves the cost.
Description
Technical Field
The invention relates to a power selection method for engineering machinery, in particular to an automatic double-power curve selection method for a land scraper.
Background
At present, a power selection circuit of a land leveler is realized by using a switch, after the switch is pressed, a voltage signal of 24V is input to an ECM power curve selection signal input end of an engine, and the engine enters an energy-saving power curve running state. And (4) disconnecting the switch, suspending the ECM power curve selection signal input end of the engine, and enabling the engine to be in a power curve. The selection of the energy-saving power state needs manual operation, the oil-saving advantage of an energy-saving power curve cannot be exerted in time, and when high power is needed due to the fact that the switch is forgotten to be closed, the power of the land leveler is insufficient, and the power curve of the engine cannot be automatically switched according to gears.
The invention discloses a Chinese patent' land leveler control device, method and land leveler with the publication number CN107882090A, which comprises: the system comprises a multi-working-condition selector switch, a gearbox gear control module, a controller module and an engine electric control module; the controller module receives and encodes control mode information sent by the multi-working-condition selector switch and gear information sent by the gearbox gear control module, and the engine electric control module determines a power curve corresponding to the encoded information and controls the output power of the engine based on the power curve.
Through the above, the core of the power curve selection of the grader in the prior art is that the controller is used for receiving information of a multi-working-condition selector switch and a gearbox gear control module, and then power coding is carried out according to the switch state and the gearbox gear to be transmitted to an engine electric control module; however, the method depends on a controller, has a complex structure and high cost, and is not beneficial to popularization.
Disclosure of Invention
The invention aims to provide an automatic double-power curve selection method of a land scraper, and aims to solve the problems of power curve selection and dependence on a control device in the prior art.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
the invention provides a method for selecting an automatic double-power curve of a land leveler, which comprises the following steps:
setting the state of a power curve, wherein the state of the power curve is divided into a power mode, an energy-saving mode and an automatic mode;
when the state of the power curve is in a power mode, setting an engine power selection signal to be in a suspension state;
setting an engine power selection signal to a high level when the state of the power curve is in an energy saving mode;
and when the state of the power curve is in an automatic mode, carrying out logic controlled processing on the engine gear signal, and setting an engine power selection signal according to a processing result.
Preferably, the step of logically controlling the engine gear signal comprises:
coding the engine gear, and outputting three paths of signals after coding;
receiving the three signals, and performing anti-interference processing on the three signals;
dividing the three signals into a first signal, a second signal and a third signal;
performing logical OR operation on the second signal and the third signal, and setting the first signal as an engine power selection signal when the operation result is high level; and when the operation result is low level, setting the engine power selection signal to be in a suspended state.
The invention has the advantages that:
1. the invention can complete the power curve selection in the automatic mode and the manual mode by matching the logic operation with the state of the power curve.
2. The invention does not need to rely on a controller, optimizes the system structure and saves the cost.
Drawings
FIG. 1 is a flow chart of a motor grader automatic dual power curve selection method according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a motor grader automatic dual-power curve selection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In an embodiment of the present invention, a method for selecting a motor grader automatic dual power curve is provided, as shown in fig. 1 and 2, including the steps of:
101. setting the state of a power curve; the states of the power curve are divided into a power mode, an energy-saving mode and an automatic mode; the state of a power curve is set by adopting a power selection switch, the power selection switch can be a double-pole triple-throw switch, and the states of the power selection switch respectively correspond to a power mode, an energy-saving mode and an automatic mode.
102. When the state of the power curve is in a power mode, setting an engine power selection signal to be in a suspension state; at this time, the engine is in a power curve; as shown in fig. 2, when the power selection switch is set to the power mode, the contact 3 and the contact 7 of the power selection switch are connected, the engine power selection signal is in a floating state that is not at a low level and a high level, and the contact 4 and the contact 10 of the power selection switch are connected, at this time, the pin 4 of the logic controlled device is floating, no loop is generated inside, and no signal is output from the pin 5 of the logic controlled device; therefore, the engine power selection signal is in a suspended state, and the engine is in a power curve.
103. Setting an engine power selection signal to a high level when the state of the power curve is in an energy saving mode; at the moment, the engine enters an energy-saving power curve; when the power selection switch is set to be in an energy-saving mode, the contact No. 3 and the contact No. 6 of the power selection switch are communicated, so that an engine power selection signal is connected with a power supply, namely the engine power selection signal is set to be in a high level, the contact No. 4 and the contact No. 9 of the power selection switch are communicated, at the moment, the contact No. 4 of the logic controlled device is suspended as a pin, no loop is generated inside, and the pin No. 5 of the logic controlled device is enabled to have no signal output; therefore, the engine power selection signal is high and the engine enters the energy saving power curve.
104. When the state of the power curve is in an automatic mode, carrying out logic controlled processing on an engine power selection signal; when the power selection switch is set to the automatic mode, the contact No. 3 of the power selection switch is communicated with the contact No. 5, the contact No. 4 of the power selection switch is communicated with the contact No. 8, the logic controlled device generates a loop, so that the contact No. 6 of the logic controlled device is communicated with the contact No. 8, and the engine power selection signal is determined by the output of the pin No. 5 of the logic controlled device.
The logic controlled processing steps in step 104 are as follows:
201. coding the engine gear, and outputting three paths of signals after coding;
the gear selector encodes the engine gear as shown in table 1.
TABLE 1
In the table, "●" indicates that the pin outputs a high signal, such as: when the gear is in a forward gear 1, the No. 1 pin, the No. 2 pin and the No. 3 pin of the gear selector all output high level signals; when the reverse gear 1 is in gear, the pin 1 and the pin 2 output high level signals, and the pin 3 outputs low level signals; after the gear selector codes the gear of the engine, three signals are output from the No. 1 pin, the No. 2 pin and the No. 3 pin.
202. Receiving the three signals, and performing anti-interference processing on the three signals;
and the pin 1, the pin 2 and the pin 3 of the isolating device are respectively connected with the pin 1, the pin 2 and the pin 3 of the gear selector and are used for receiving three signals, carrying out anti-interference processing on the three signals and preventing mutual influence among the signals.
203. Dividing the three signals into a first signal, a second signal and a third signal;
taking a signal of a pin No. 1 of a gear selector as a first signal, taking a signal of a pin No. 2 of the gear selector as a second signal, and taking a signal of a pin No. 3 of the gear selector as a third signal; the three signals are transmitted to the logic controlled device through the isolation device.
204. Performing logical OR operation on the second signal and the third signal, and setting the first signal as an engine power selection signal when the operation result is high level; when the operation result is low level, setting the engine power selection signal to be low level; the logic controlled device carries out logic OR operation on the second signal and the third signal, and when any one of the second signal and the third signal has a signal and the No. 4 pin of the logic controlled device is grounded (in an automatic mode, namely when the No. 4 contact and the No. 8 contact of the power selection switch are connected), so that a loop is generated, the No. 6 contact and the No. 8 contact of the logic controlled device are connected; when no loop is generated, the No. 6 contact and the No. 7 contact of the logic controlled device are connected, and the No. 5 pin of the logic controlled device has no signal output; thus, as follows: when the gear selector is in a forward gear 1 gear, a forward gear 2 gear, a forward gear 3 gear and a reverse gear 1 gear, loops are generated in an automatic mode according to codes and logical OR operation, at the moment, a contact 6 of a logic controlled device is connected with a contact 8, and a first signal (a signal of a pin 1 of the gear selector) is set as an engine power selection signal; when the gear selector is in other gears, a loop cannot be generated according to coding and logical OR operation in an automatic mode, and the engine power selection signal is in a suspended state without signal input; in the non-automatic mode (manual mode and energy-saving mode), no loop is generated according to coding and logical OR operation, at this time, the No. 6 contact and the No. 7 contact of the logic controlled device are connected, the No. 5 pin of the logic controlled device has no signal output, and the engine power selection signal is not determined by the logic controlled device but determined by the state of the power curve set by the power selection switch.
Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention.
Claims (2)
1. A motor grader automatic dual power curve selection method is characterized by comprising the following steps:
setting the state of a power curve, wherein the state of the power curve is divided into a power mode, an energy-saving mode and an automatic mode; setting the state of a power curve by adopting a power selection switch, wherein the power selection switch is a double-pole triple-throw switch, and the states of the power selection switch respectively correspond to a power mode, an energy-saving mode and an automatic mode; when the state of the power curve is in a power mode, setting an engine power selection signal to be in a suspension state; the No. 3 contact of the power selection switch is communicated with the No. 7 contact, the engine power selection signal is in a suspension state which is not low level or high level, the No. 4 contact of the power selection switch is communicated with the No. 10 contact, the No. 4 pin of the logic controlled device is suspended, no loop is generated inside, and no signal is output from the No. 5 pin of the logic controlled device; the engine power selection signal is in a suspended state, and the engine is in a power curve;
setting an engine power selection signal to a high level when the state of the power curve is in an energy saving mode; setting the engine power selection signal to be high level, and enabling the engine to enter an energy-saving power curve; when the power selection switch is set to be in an energy-saving mode, a contact No. 3 and a contact No. 6 of the power selection switch are communicated, so that an engine power selection signal is connected with a power supply, the engine power selection signal is in a high level, a contact No. 4 of the power selection switch is communicated with a contact No. 9, a pin No. 4 of the logic controlled device is suspended, no loop is generated inside, a pin No. 5 of the logic controlled device is enabled to have no signal output, the engine power selection signal is in a high level, and the engine enters an energy-saving power curve;
when the state of the power curve is in an automatic mode, carrying out logic controlled processing on the engine gear signal, and setting an engine power selection signal according to a processing result; when the power selection switch is set to the automatic mode, the contact No. 3 of the power selection switch is communicated with the contact No. 5, the contact No. 4 of the power selection switch is communicated with the contact No. 8, the logic controlled device generates a loop, so that the contact No. 6 of the logic controlled device is communicated with the contact No. 8, and the engine power selection signal is determined by the output of the pin No. 5 of the logic controlled device.
2. The method of claim 1, wherein the step of logically controlling the processing of the engine gear signal comprises:
coding the engine gear, and outputting three paths of signals after coding;
receiving the three signals, and performing anti-interference processing on the three signals; the pin 1, the pin 2 and the pin 3 of the isolating device are respectively connected with the pin 1, the pin 2 and the pin 3 of the gear selector and are used for receiving three signals, carrying out anti-interference processing on the three signals and preventing mutual influence among the signals;
dividing the three signals into a first signal, a second signal and a third signal; taking a signal of a pin No. 1 of a gear selector as a first signal, taking a signal of a pin No. 2 of the gear selector as a second signal, and taking a signal of a pin No. 3 of the gear selector as a third signal; the three signals are transmitted to the logic controlled device through the isolation device;
performing logical OR operation on the second signal and the third signal, and setting the first signal as an engine power selection signal when the operation result is high level; when the operation result is low level, setting the engine power selection signal to be in a suspension state; the logic controlled device carries out logic OR operation on the second signal and the third signal, and when any one of the second signal and the third signal exists and the pin No. 4 of the logic controlled device is grounded to generate a loop, the contact No. 6 of the logic controlled device is communicated with the contact No. 8; when no loop is generated, the No. 6 contact and the No. 7 contact of the logic controlled device are connected, and the No. 5 pin of the logic controlled device has no signal output; the engine power selection signal is not determined by the logic controlled device but by the state of the power curve set by the power selection switch.
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| CN201811367743.7A CN109404143B (en) | 2018-11-16 | 2018-11-16 | Automatic double-power curve selection method for land leveler |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310101A (en) * | 2005-12-22 | 2008-11-19 | 株式会社小松制作所 | Engine control device for working vehicle |
| US7621127B2 (en) * | 2007-04-13 | 2009-11-24 | Honda Motor Co., Ltd. | Method for manually controlling a turbocharger |
| CN101976052A (en) * | 2010-11-05 | 2011-02-16 | 天津工业大学 | Logic control device |
| CN102128093A (en) * | 2010-01-19 | 2011-07-20 | 井关农机株式会社 | Engine control device for tractor |
| CN103334843A (en) * | 2013-06-27 | 2013-10-02 | 山东临工工程机械有限公司 | Land lever variable-power control system |
-
2018
- 2018-11-16 CN CN201811367743.7A patent/CN109404143B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310101A (en) * | 2005-12-22 | 2008-11-19 | 株式会社小松制作所 | Engine control device for working vehicle |
| US7621127B2 (en) * | 2007-04-13 | 2009-11-24 | Honda Motor Co., Ltd. | Method for manually controlling a turbocharger |
| CN102128093A (en) * | 2010-01-19 | 2011-07-20 | 井关农机株式会社 | Engine control device for tractor |
| CN101976052A (en) * | 2010-11-05 | 2011-02-16 | 天津工业大学 | Logic control device |
| CN103334843A (en) * | 2013-06-27 | 2013-10-02 | 山东临工工程机械有限公司 | Land lever variable-power control system |
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