CN113431677B - Self-adaptive power regulation method and control system of engine of pavement cold regenerator - Google Patents
Self-adaptive power regulation method and control system of engine of pavement cold regenerator Download PDFInfo
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- CN113431677B CN113431677B CN202110642996.6A CN202110642996A CN113431677B CN 113431677 B CN113431677 B CN 113431677B CN 202110642996 A CN202110642996 A CN 202110642996A CN 113431677 B CN113431677 B CN 113431677B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003801 milling Methods 0.000 claims abstract description 50
- 238000004064 recycling Methods 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000009347 mechanical transmission Effects 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000006399 behavior Effects 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims 4
- 206010063385 Intellectualisation Diseases 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/081—Safety, indicating, or supervising devices relating to endless members
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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
- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Civil Engineering (AREA)
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- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention discloses an engine power self-adaptive adjusting method of a pavement cold recycling machine and a control system thereof, wherein the adjusting method comprises the steps of starting a milling drum, judging a transmission mode, adjusting the power of a hydraulic transmission mode, adjusting the power of a mechanical transmission mode and the like; the control system comprises a vehicle control unit, an engine power switching circuit and an engine controller; the engine controller is connected with the whole vehicle controller through an engine power switching circuit; has the advantages that: the invention realizes the automatic switching of the power mode of the engine, reduces the complexity and the untimely switching of the traditional manual knob and improves the working efficiency; the engine automatically switches power according to actual working conditions, so that the automation and the intellectualization of the pavement cold recycling machine are realized; meanwhile, the invention can also give consideration to the self-adaptive adjustment of the engine power of the pavement cold regenerator with two types of hydraulic drive mode and mechanical drive mode, thereby improving the compatibility of the invention.
Description
Technical Field
The invention relates to an engine control system, in particular to an engine power self-adaptive adjusting method of a road surface cold regenerator and a control system thereof, belonging to the technical field of engineering machinery.
Background
The cold regenerating machine for road surface is an environment-protecting and high-efficiency road construction equipment designed and manufactured for adapting to the construction of urban and rural roads, and when in operation, old asphalt road surface is milled and crushed, at the same time, stabilizing agent (cement, lime, water, etc.) is added, and mixed in situ, and formed into new road base layer by means of shaping and compacting.
The milling and regenerating operation of the asphalt pavement is a common working process of a pavement cold regenerator, and the cold regeneration milling and regenerating process comprises the following steps:
A. determining milling depth: starting a milling drum, and milling the milling drum downwards from an initial position to the milling depth;
B. forward propulsion milling: after the milling depth reaches the time, the vehicle moves forward, and the milling drum mills the pavement forward and mixes materials;
C. finishing milling and planing: after the milling operation is finished, the milling drum is lifted to the initial position;
D. the vehicle returns to the starting point: reversing or turning around to return to the starting point of the next milling to prepare for the next milling operation;
E. and repeating the steps A to D until the cold regeneration operation of the whole operation area is completed.
The road surface cold recycling machine is divided into a hydraulic driving road surface cold recycling machine and a mechanical driving road surface cold recycling machine according to different driving modes of the milling drum, the hydraulic driving road surface cold recycling machine is driven by a working pump driving motor mode, and the mechanical driving road surface cold recycling machine drives the milling drum to rotate by a mechanical driving mode. However, the power of any type of engine is originated from the engine, and the engine needs to be controlled to select a proper power output mode according to the actual working condition.
The engine for the existing road cold regenerator has three power modes, namely a no-load power mode, a medium-load power mode and a heavy-load power mode, the engine is required to be switched to the medium-load or heavy-load mode in the steps A and B, and an operator can manually switch the power mode of the engine through a multi-power fuel-saving switch according to different working conditions. However, the judgment of the working condition is carried out by an operator according to experience, so that the requirement on the operator is high, the power mode of the engine is frequently switched in the operation process, and the workload of the operator is greatly increased; and if the operator judges the working condition wrongly, the selection of the unmatched operation mode can cause the increase of the oil consumption of the pavement cold recycling machine and influence the performance of the whole machine product.
With the development trend of the intellectualization and automation of engineering machinery products, higher requirements are also put forward for a control system of a pavement cold recycling machine. However, the judgment conditions of the working loads of the hydraulic drive road surface cold regenerator and the mechanical drive road surface cold regenerator are different, so that the two types of the cold regenerators are difficult to be considered when the engine power is adaptively regulated.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an engine power self-adaptive adjusting method of a road surface cold regenerator and a control system thereof, aiming at the problems of complexity and untimely switching of a traditional manual knob in the prior art. The invention can be simultaneously suitable for the self-adaptive adjustment of the engine power of the road cold regenerator in a hydraulic driving mode and a mechanical driving mode.
The technical scheme is as follows: a self-adaptive power regulation method for an engine of a road cold regenerator comprises the following steps:
step one, starting a milling drum;
step two, judging a transmission mode: detecting a pressure signal of a working hydraulic system; if a pressure signal exists, the hydraulic transmission mode is set, and the step three is entered; if no pressure signal exists, the mode is a mechanical transmission mode, and the step four is entered;
step three, detecting a pressure value P of the working hydraulic system, judging a power mode output by the engine according to the detected pressure value P of the current working hydraulic system and finishing switching;
step four, detecting the position of the milling drum, judging the milling drum as a working position when the vertical height of the milling drum is lower than the critical position of the milling drum in contact with the ground, and entering step five; when the vertical height of the milling drum is higher than or equal to the critical position, the milling drum is judged to be in a non-working position, the whole vehicle controller judges that the engine in the current state is in an idle mode, and the whole vehicle controller controls the engine controller to switch to the idle mode;
judging the vehicle advancing direction, wherein when the vehicle moves backwards, the vehicle control unit judges that the engine in the current state is in a no-load mode, controls the engine control unit to switch to the no-load mode and prompts a driver to have misoperation; when the vehicle stops or moves forward, entering a sixth step;
and step six, detecting a pressure value C of the walking hydraulic system, judging a power mode output by the engine according to the detected current pressure value C of the walking hydraulic system, and finishing switching.
The driving form of the milling drum of the engine of the current pavement cold recycling machine can be automatically judged by detecting the pressure signal of the working hydraulic system, and a corresponding power self-adaptive adjustment method of the engine is selected according to the driving form; the self-adaptive power regulation of the engine is realized on the premise of considering two driving modes, the complexity and the untimely time of switching the traditional manual knob are reduced, and the working efficiency is improved.
Preferably, in order to realize automatic adjustment of the power mode of the engine output in the hydraulic driving mode, the method for determining the power mode of the engine output and completing switching according to the detected current working hydraulic system pressure value P in the third step is as follows:
setting the pressure critical value of the working hydraulic system to be P when the load reaches the medium-load output mode of the engine1When the load reaches the heavy-load output mode of the engine, the pressure critical value of the working hydraulic system is P2When the load reaches the engine overload output mode, the pressure critical value of the working hydraulic system is P3(ii) a Comparing the detected pressure value P of the working hydraulic system with a set value:
when P is present< P1When the vehicle control unit judges that the engine in the current state is in the no-load mode, the vehicle control unit controls the engine controller to switch to the no-load mode;
when P is present2>P≥P1When the vehicle controller judges that the engine in the current state is in the middle-load mode, the vehicle controller controls the engine controller to switch to the middle-load mode;
when P is present3>P≥P2When the vehicle control unit judges that the engine in the current state is in the heavy-load mode, the vehicle control unit controls the engine controller to switch to the heavy-load mode;
when P is more than or equal to P3And when the vehicle control unit judges that the engine in the current state is in an overload mode, the vehicle control unit reduces the walking speed of the walking system, reduces the working pressure of the working hydraulic system and prompts a driver to be in the overload state at present.
Preferably, in order to realize automatic adjustment of the power mode output by the engine in the mechanical driving mode, the method for determining the power mode output by the engine according to the detected current walking hydraulic system pressure value C and completing switching in the sixth step is as follows:
setting the pressure critical value of the working hydraulic system when the load reaches the medium-load output mode of the engine to be C1When the load reaches the heavy-load output mode of the engine, the pressure critical value of the working hydraulic system is C2When the load reaches the engine overload output mode, the pressure critical value of the working hydraulic system is C3(ii) a Comparing the detected pressure value C of the working hydraulic system with a set value:
when C is present< C1When the vehicle controller judges that the engine in the current state is in the no-load mode, the vehicle controller controls the engine controller to switch to the no-load mode;
when C is present2>C≥C1When the vehicle controller judges that the engine in the current state is in the middle-load mode, the vehicle controller controls the engine controller to switch to the middle-load mode;
when C is present3>C≥C2When the vehicle control unit judges that the engine in the current state is in the heavy-load mode, the vehicle control unit controls the engine controller to switch to the heavy-load mode;
when C is more than or equal to C3And when the vehicle control unit judges that the engine in the current state is in an overload mode, the vehicle control unit reduces the walking speed of the walking system, reduces the working pressure of the working hydraulic system and prompts a driver to be in the overload state at present.
A control system of a power self-adaptive adjustment method of a road surface cold regenerator engine comprises a vehicle control unit, an engine power switching circuit and an engine controller; the engine controller is connected with the whole vehicle controller through an engine power switching circuit;
the whole vehicle controller is provided with a working hydraulic system pressure signal acquisition port, a milling drum position signal acquisition port, a walking handle potentiometer signal acquisition port and a walking hydraulic system pressure signal acquisition port;
a working hydraulic system pressure sensor is arranged in a working hydraulic system of the hydraulically-driven pavement cold recycling machine and is connected with a working hydraulic system pressure signal acquisition port of the whole vehicle controller;
a milling drum lifting oil cylinder of the mechanically driven pavement cold recycling machine is provided with a displacement sensor, and the displacement sensor is connected with a milling drum position signal acquisition port of the whole vehicle controller; a potentiometer is arranged on a walking handle of the mechanically-driven pavement cold recycling machine and is connected with a walking handle potentiometer signal acquisition port of the whole vehicle controller; a walking hydraulic system pressure sensor is arranged in a walking hydraulic system of the mechanical driving pavement cold recycling machine and connected with a walking hydraulic system pressure signal acquisition port of the whole vehicle controller.
Preferably, in order to realize the automatic transmission of three control signals of no-load, medium-load and heavy-load of the engine, the engine power switching circuit comprises a three-position switch, a medium-load relay, a heavy-load relay, a first resistor R1, a second resistor R2 and a third resistor R3; two ends of the three-position switch are respectively connected with an engine controller; three selection ends of the three-position switch are respectively a no-load end, a medium-load end and a heavy-load end; the medium-load relay and the heavy-load relay are respectively connected with the whole vehicle controller;
when the medium load relay and the heavy load relay are not powered, the three-position switch is connected with a no-load end, and the no-load end is connected with an engine controller after being connected in series through a first resistor R1, a second resistor R2 and a third resistor R3;
the middle load relay is electrified, and when the heavy load relay is not electrified, the three-position switch is connected with the middle load end, and the middle load end is connected with the engine controller after being connected in series with the second resistor R2 through the first resistor R1;
the heavy load relay is electrified, and when the medium load relay is not electrified, the three-position switch is connected with the heavy load end, and the heavy load end is connected with the engine controller through a first resistor R1.
Preferably, in order to avoid damage to the whole vehicle caused by overload, the control system further comprises a forward electromagnetic valve of the walking pump, the whole vehicle controller is connected with the forward electromagnetic valve of the walking pump, and the whole vehicle controller controls the speed of the vehicle to advance through the forward electromagnetic valve of the walking pump. When the overload condition occurs, the whole vehicle controller reduces the running speed, so that the working load is reduced, the whole vehicle controller is restored to a normal working state, and the damage to the whole vehicle is avoided.
Preferably, in order to timely remind a driver of the abnormal vehicle state, the control system further comprises a prompting device, the vehicle controller is connected with the prompting device, and the vehicle controller prompts the driver that the vehicle is in an overload state or has misoperation behaviors through the prompting device.
Has the advantages that: the invention realizes the automatic switching of the power mode of the engine, reduces the complexity and the untimely switching of the traditional manual knob and improves the working efficiency; the engine automatically switches power according to actual working conditions, so that the automation and the intellectualization of the pavement cold recycling machine are realized; meanwhile, the invention can also give consideration to the self-adaptive adjustment of the engine power of the pavement cold regenerator with two types of hydraulic drive mode and mechanical drive mode, thereby improving the compatibility of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a control schematic of the present invention;
FIG. 2 is a schematic diagram of the control system of the present invention;
fig. 3 is a graph of power variation for three modes of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1, a method for adaptively adjusting the power of an engine of a road cold regenerator includes the following steps:
step one, starting a milling drum;
step two, judging a transmission mode: detecting a pressure signal of a working hydraulic system; if a pressure signal exists, the hydraulic transmission mode is set, and the step three is entered; if no pressure signal exists, the mode is a mechanical transmission mode, and the step four is entered;
step three, detecting a pressure value P of the working hydraulic system, judging a power mode output by the engine according to the detected pressure value P of the current working hydraulic system and finishing switching;
the method for judging the power mode output by the engine and completing switching according to the detected pressure value P of the current working hydraulic system comprises the following steps:
setting the pressure critical value of the working hydraulic system to be P when the load reaches the medium-load output mode of the engine1When the load reaches the heavy-load output mode of the engine, the pressure critical value of the working hydraulic system is P2When the load reaches the engine overload output mode, the pressure critical value of the working hydraulic system is P3(ii) a Comparing the detected pressure value P of the working hydraulic system with a set value:
when P is present< P1When the vehicle controller judges that the engine in the current state is in the no-load mode, the vehicle controller controls the engine controller to switch to the no-load mode;
when P is present2>P≥P1When the vehicle controller judges that the engine in the current state is in the middle-load mode, the vehicle controller controls the engine controller to switch to the middle-load mode;
when P is present3>P≥P2When the vehicle control unit judges that the engine in the current state is in the heavy-load mode, the vehicle control unit controls the engine controller to switch to the heavy-load mode;
when P is more than or equal to P3And when the vehicle control unit judges that the engine in the current state is in an overload mode, the vehicle control unit reduces the walking speed of the walking system, reduces the working pressure of the working hydraulic system and prompts a driver to be in the overload state at present.
Step four, detecting the position of the milling drum, judging the milling drum to be a working position when the vertical height of the milling drum is lower than the critical position of the milling drum in contact with the ground, and entering a step five; when the vertical height of the milling drum is higher than or equal to the critical position, the milling drum is judged to be in a non-working position, the whole vehicle controller judges that the engine in the current state is in an idle mode, and the whole vehicle controller controls the engine controller to switch to the idle mode;
judging the vehicle advancing direction, wherein when the vehicle moves backwards, the vehicle control unit judges that the engine in the current state is in a no-load mode, controls the engine control unit to switch to the no-load mode and prompts a driver to have misoperation; when the vehicle stops or moves forwards, entering a sixth step;
and step six, detecting a pressure value C of the walking hydraulic system, judging a power mode output by the engine according to the detected current pressure value C of the walking hydraulic system, and finishing switching.
The method for judging the power mode output by the engine and completing switching according to the detected pressure value C of the current walking hydraulic system comprises the following steps:
setting the pressure critical value of the working hydraulic system when the load reaches the medium-load output mode of the engine to be C1When the load reaches the heavy-load output mode of the engine, the pressure critical value of the working hydraulic system is C2When the load reaches the engine overload output mode, the pressure critical value of the working hydraulic system is C3(ii) a Comparing the detected pressure value C of the working hydraulic system with a set value:
when C is present< C1When the vehicle control unit judges that the engine in the current state is in the no-load mode, the vehicle control unit controls the engine controller to switch to the no-load mode;
when C is present2>C≥C1When the vehicle controller judges that the engine in the current state is in the middle-load mode, the vehicle controller controls the engine controller to switch to the middle-load mode;
when C is present3>C≥C2When the vehicle control unit judges that the engine in the current state is in the heavy-load mode, the vehicle control unit controls the engine controller to switch to the heavy-load mode;
when C is more than or equal to C3And when the vehicle control unit judges that the engine in the current state is in an overload mode, the vehicle control unit reduces the walking speed of the walking system, reduces the working pressure of the working hydraulic system and prompts a driver to be in the overload state at present.
The driving form of the milling drum of the engine of the current pavement cold recycling machine can be automatically judged by detecting the pressure signal of the working hydraulic system, and a corresponding power self-adaptive adjustment method of the engine is selected according to the driving form; the self-adaptive power regulation of the engine is realized on the premise of considering two driving modes, the complexity and the untimely time of switching the traditional manual knob are reduced, and the working efficiency is improved.
As shown in fig. 2, a control system of a power self-adaptive adjustment method for a road surface cold recycling machine engine comprises a vehicle control unit, an engine power switching circuit and an engine controller; the engine controller is connected with the whole vehicle controller through an engine power switching circuit;
the whole vehicle controller is provided with a working hydraulic system pressure signal acquisition port, a milling drum position signal acquisition port, a walking handle potentiometer signal acquisition port and a walking hydraulic system pressure signal acquisition port;
a working hydraulic system pressure sensor is arranged in a working hydraulic system of the hydraulically-driven pavement cold recycling machine and is connected with a working hydraulic system pressure signal acquisition port of the whole vehicle controller;
a milling drum lifting oil cylinder of the mechanically-driven pavement cold recycling machine is provided with a displacement sensor, and the displacement sensor is connected with a milling drum position signal acquisition port of a vehicle control unit; a potentiometer is arranged on a walking handle of the mechanically-driven pavement cold recycling machine and is connected with a walking handle potentiometer signal acquisition port of the whole vehicle controller; a walking hydraulic system pressure sensor is arranged in a walking hydraulic system of the mechanical driving pavement cold recycling machine and connected with a walking hydraulic system pressure signal acquisition port of the whole vehicle controller.
In order to realize the automatic transmission of three control signals of no-load, medium-load and heavy-load of the engine, the power switching circuit of the engine comprises a three-position switch, a medium-load relay, a heavy-load relay, a first resistor R1, a second resistor R2 and a third resistor R3; two ends of the three-position switch are respectively connected with an engine controller; three selection ends of the three-position switch are respectively a no-load end, a medium-load end and a heavy-load end; the medium-load relay and the heavy-load relay are respectively connected with the whole vehicle controller;
when the medium load relay and the heavy load relay are not powered, the three-position switch is connected with a no-load end, and the no-load end is connected with an engine controller after being connected in series through a first resistor R1, a second resistor R2 and a third resistor R3;
the middle load relay is electrified, and when the heavy load relay is not electrified, the three-position switch is connected with the middle load end, and the middle load end is connected with the engine controller after being connected in series with the second resistor R2 through the first resistor R1;
the heavy load relay is electrified, and when the medium load relay is not electrified, the three-position switch is connected with the heavy load end, and the heavy load end is connected with the engine controller through a first resistor R1.
In order to avoid damage to the whole vehicle caused by overload, the control system further comprises a forward electromagnetic valve of the walking pump, the whole vehicle controller is connected with the forward electromagnetic valve of the walking pump, and the whole vehicle controller controls the speed of the vehicle to advance through the forward electromagnetic valve of the walking pump. When the overload condition occurs, the whole vehicle controller reduces the running speed, so that the working load is reduced, the whole vehicle controller is restored to a normal working state, and the damage to the whole vehicle is avoided.
In order to remind a driver of the abnormal vehicle state in time, the control system further comprises a prompting device, the vehicle control unit is connected with the prompting device, and the vehicle control unit prompts the driver of the current overload state or the misoperation behavior through the prompting device.
According to the collected signals, the engine controller selects the output power of the corresponding engine, and FIG. 3 is a power variation curve chart of power generation heavy load/medium load/no load.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A self-adaptive power regulation method for an engine of a road cold regenerator is characterized by comprising the following steps:
step one, starting a milling drum;
step two, judging a transmission mode: detecting a pressure signal of a working hydraulic system; if a pressure signal exists, the hydraulic transmission mode is set, and the step three is entered; if no pressure signal exists, the mode is a mechanical transmission mode, and the step four is entered;
step three, detecting a pressure value P of the working hydraulic system, judging a power mode output by the engine according to the detected pressure value P of the current working hydraulic system, and completing switching;
setting the pressure critical value of the working hydraulic system to be P when the load reaches the medium-load output mode of the engine1When the load reaches the heavy-load output mode of the engine, the pressure critical value of the working hydraulic system is P2When the load reaches the engine overload output mode, the pressure critical value of the working hydraulic system is P3(ii) a Comparing the detected pressure value P of the working hydraulic system with a set value:
when P is present< P1When the vehicle control unit judges that the engine in the current state is in the no-load mode, the vehicle control unit controls the engine controller to switch to the no-load mode;
when P is present2>P≥P1When the vehicle controller judges that the engine is in the middle load mode in the current state, the vehicle controller controls the engine controller to switch to the middle load mode;
when P is present3>P≥P2When the vehicle control unit judges that the engine in the current state is in the heavy-load mode, the vehicle control unit controls the engine controller to switch to the heavy-load mode;
when P is more than or equal to P3In time, the vehicle control unit judges that the engine in the current state should be usedIn an overload mode, the vehicle control unit reduces the walking speed of the walking system, reduces the working pressure of the working hydraulic system and prompts a driver to be in an overload state at present;
step four, detecting the position of the milling drum, judging the milling drum to be a working position when the vertical height of the milling drum is lower than the critical position of the milling drum in contact with the ground, and entering a step five; when the vertical height of the milling drum is higher than or equal to the critical position, the milling drum is judged to be in a non-working position, the whole vehicle controller judges that the engine in the current state is in an idle mode, and the whole vehicle controller controls the engine controller to switch to the idle mode;
judging the vehicle advancing direction, wherein when the vehicle moves backwards, the vehicle control unit judges that the engine in the current state is in a no-load mode, controls the engine control unit to switch to the no-load mode and prompts a driver to have misoperation; when the vehicle stops or moves forward, entering a sixth step;
step six, detecting a pressure value C of the walking hydraulic system, judging a power mode output by the engine according to the detected pressure value C of the current walking hydraulic system, and completing switching;
setting the pressure critical value of the working hydraulic system when the load reaches the medium-load output mode of the engine to be C1When the load reaches the heavy-load output mode of the engine, the pressure critical value of the working hydraulic system is C2When the load reaches the engine overload output mode, the pressure critical value of the working hydraulic system is C3(ii) a Comparing the detected pressure value C of the working hydraulic system with a set value:
when C is present< C1When the vehicle control unit judges that the engine in the current state is in the no-load mode, the vehicle control unit controls the engine controller to switch to the no-load mode;
when C is present2>C≥C1When the vehicle controller judges that the engine in the current state is in the middle-load mode, the vehicle controller controls the engine controller to switch to the middle-load mode;
when C is present3>C≥C2When the vehicle control unit judges that the engine in the current state is in the heavy load mode, the vehicle control unit controls the engine to controlSwitching the device to a heavy load mode;
when C is more than or equal to C3When the vehicle control unit judges that the engine in the current state is in the overload mode, the vehicle control unit reduces the walking speed of the walking system, reduces the working pressure of the working hydraulic system and prompts a driver to be in the overload state at present.
2. The control system of the adaptive power regulation method of the engine of the road cold recycling machine according to claim 1, characterized in that:
the system comprises a vehicle controller, an engine power switching circuit and an engine controller; the engine controller is connected with the whole vehicle controller through an engine power switching circuit;
the whole vehicle controller is provided with a working hydraulic system pressure signal acquisition port, a milling drum position signal acquisition port, a walking handle potentiometer signal acquisition port and a walking hydraulic system pressure signal acquisition port;
a working hydraulic system pressure sensor is arranged in a working hydraulic system of the hydraulically-driven pavement cold recycling machine and is connected with a working hydraulic system pressure signal acquisition port of the whole vehicle controller;
a milling drum lifting oil cylinder of the mechanically driven pavement cold recycling machine is provided with a displacement sensor, and the displacement sensor is connected with a milling drum position signal acquisition port of the whole vehicle controller; a potentiometer is arranged on a walking handle of the mechanically-driven pavement cold recycling machine and is connected with a walking handle potentiometer signal acquisition port of the whole vehicle controller; a walking hydraulic system pressure sensor is arranged in a walking hydraulic system of the mechanical driving pavement cold recycling machine and connected with a walking hydraulic system pressure signal acquisition port of the whole vehicle controller.
3. The control system of the adaptive power regulation method of the engine of the road cold recycling machine according to claim 2, characterized in that: the engine power switching circuit comprises a three-position switch, a medium load relay, a heavy load relay, a first resistor R1, a second resistor R2 and a third resistor R3; two ends of the three-position switch are respectively connected with an engine controller; three selection ends of the three-position switch are respectively a no-load end, a medium-load end and a heavy-load end; the medium-load relay and the heavy-load relay are respectively connected with the whole vehicle controller;
when the medium load relay and the heavy load relay are not electrified, the three-position switch is connected with the no-load end, and the no-load end is connected with the engine controller after being connected in series through a first resistor R1, a second resistor R2 and a third resistor R3;
the middle load relay is electrified, and when the heavy load relay is not electrified, the three-position switch is connected with the middle load end, and the middle load end is connected with the engine controller after being connected in series with the second resistor R2 through the first resistor R1;
the heavy load relay is electrified, and when the medium load relay is not electrified, the three-position switch is connected with the heavy load end, and the heavy load end is connected with the engine controller through a first resistor R1.
4. The control system of the adaptive power regulation method of the engine of the road cold recycling machine according to claim 2, characterized in that: the vehicle controller is connected with the advancing electromagnetic valve of the walking pump, and the vehicle controller controls the advancing speed of the vehicle through the advancing electromagnetic valve of the walking pump.
5. The control system of the adaptive power regulation method of the engine of the road cold recycling machine according to claim 4, characterized in that: the vehicle control unit is connected with the prompting device and prompts a driver that the vehicle is in an overload state or has misoperation behaviors through the prompting device.
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| CN101893019B (en) * | 2009-05-20 | 2012-11-14 | 陈帮勇 | Hydraulic test system and hydraulic test method |
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