CN112901358A - Engine pre-fuel injection torque control system and method based on load identification - Google Patents
Engine pre-fuel injection torque control system and method based on load identification Download PDFInfo
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- CN112901358A CN112901358A CN202110170405.XA CN202110170405A CN112901358A CN 112901358 A CN112901358 A CN 112901358A CN 202110170405 A CN202110170405 A CN 202110170405A CN 112901358 A CN112901358 A CN 112901358A
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- engine
- ecm1
- controller
- torque
- ecm2
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- 238000002347 injection Methods 0.000 title claims abstract description 28
- 239000007924 injection Substances 0.000 title claims abstract description 28
- 239000000446 fuel Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 12
- 102100031758 Extracellular matrix protein 1 Human genes 0.000 claims abstract description 48
- 101000866526 Homo sapiens Extracellular matrix protein 1 Proteins 0.000 claims abstract description 48
- 102100023077 Extracellular matrix protein 2 Human genes 0.000 claims abstract description 30
- 101001050211 Homo sapiens Extracellular matrix protein 2 Proteins 0.000 claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
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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
- F02D29/02—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 peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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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
- F02D29/04—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 peculiar to engines driving pumps
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses an engine pre-injection torque control system and method based on load identification. The pilot handle is connected to the excavator controller ECM1 via a CAN bus, and the excavator controller ECM1 is connected to the engine controller ECM2 via a CAN bus. The excavator controller ECM1 is connected to the main pump by a control line. According to the invention, the predicted required torque and the main pump displacement are calculated by the excavator controller ECM1, the torque requirement is sent to the engine controller ECM2, the ECM2 controls the fuel injection of the engine and regulates the output rotating speed and the torque of the engine, the excavator controller ECM1 controls the engine earlier than the main pump, the rotating speed fluctuation of the engine can be effectively reduced, and the recovery time after the rotating speed fluctuation is shortened.
Description
Technical Field
The invention relates to the technical field of excavators, in particular to a system and a method for controlling pre-injection torque of an engine based on load identification.
Background
On the existing excavator, the excavator ECM1 only outputs the rotating speed requirement to the engine ECM2, when the power of a main pump changes, the output power and the torque of the engine are not matched with the requirement of the main pump, the rotating speed of the engine is severely fluctuated, and then the ECM2 regulates the oil injection quantity through a PID control strategy to stabilize the rotating speed of the engine. Because the load of the excavator changes frequently, the output torque of the engine is always in a tracking matching stage, the rotation speed fluctuation is large, and the recovery time after the rotation speed fluctuation is long.
Disclosure of Invention
The invention aims to provide an engine pre-injection torque control system and method based on load identification.A controller ECM1 of an excavator calculates required torque according to output signals of a pilot handle and sends the required torque to an engine controller ECM2, and the engine controller ECM2 controls an engine to change the injection quantity through characteristic curves of engine power, torque and injection quantity so as to change the output power and the torque of the engine; on the other hand, the excavator controller ECM1 is used to control the main pump displacement by outputting a current signal. The torque and power demand output signals of the excavator controller ECM1 to the engine controller ECM2 are earlier than the displacement control output signals of the excavator controller ECM1 to the main pump, so that the engine response is earlier than the main pump response, when the load of the hydraulic main pump changes, the engine speed fluctuation can be reduced, and the recovery time after the engine speed fluctuation is shortened.
To achieve the above objects, an aspect of the present invention provides a load recognition-based engine pre-injection torque control system, including a pilot handle, an excavator controller ECM1, an engine controller ECM2, and a main pump; the pilot handle is connected to the excavator controller ECM1 via a CAN bus, and the excavator controller ECM1 is connected to the engine controller ECM2 via a CAN bus; the excavator controller ECM1 is connected to the main pump by a control line.
Further, the pilot handle is a hydraulic handle.
Further, the pilot handle is an electric control handle.
In another aspect, the present invention further provides a method for controlling pre-injection torque of an engine based on load identification, comprising the steps of:
(1) the pilot handle output signal is sent to the excavator controller ECM1 through a CAN bus, the excavator controller ECM1 calculates the predicted required power and torque through the pilot handle signal and sends the power and torque values to the engine controller ECM2 through the CAN bus, and the engine controller ECM2 controls the engine to change the fuel injection quantity through the characteristic curve of the engine power, the torque and the fuel injection quantity so as to realize the change of the engine output power and the torque;
(2) the excavator controller ECM1 calculates an output current signal for controlling the main pump displacement based on the input pilot handle signal.
(3) The torque and power demand output signals of the excavator controller ECM1 to the engine controller ECM2 are earlier than the displacement control output signals of the ECM1 to the main pump.
Further, the excavator controller ECM1 calculates the estimated power and torque from the pilot handle output signal via a pre-stored algorithm.
Further, the engine controller ECM2 prestores the relationship between the amount of fuel injected by the engine and the output speed, output power, and torque.
The invention has the beneficial effects that: calculating the predicted required torque and the main pump displacement through the ECM1, sending the torque requirement to the ECM2, and controlling the fuel injection of the engine and regulating the output speed and the output torque of the engine by the ECM2 according to table lookup prestored data; the ECM1, on the other hand, controls main pump displacement changes. The ECM1 controls the engine earlier than the main pump, and the engine has advanced fueling in response to the main pump, effectively reducing engine speed fluctuations and reducing recovery time after speed fluctuations.
Drawings
FIG. 1 is a schematic structural view of the present invention;
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in FIG. 1, a load identification based engine pre-injection torque control system includes a pilot handle, an excavator controller ECM1, an engine controller ECM2, and a main pump. The pilot handle is connected to the excavator controller ECM1 via a CAN bus, and the excavator controller ECM1 is connected to the engine controller ECM2 via a CAN bus. The excavator controller ECM1 is connected to the main pump by a control line. The excavator control system provides two ways of control, one way controls the engine control system, and the other way controls the main pump through a current control signal. The pilot handle can be a hydraulic handle or an electric control handle, for example, the hydraulic handle has different moving amplitude and different output pressure, the excavator working device has different moving speed and different required power, and the pressure signal of the hydraulic handle is collected and transmitted to the excavator controller ECM1 to calculate the required power. The control logic of the control system is that the excavator controller ECM1 calculates the predicted required torque and the main pump displacement according to the pressure signal or the electric control signal provided by the pilot handle, and sends the torque demand to the engine controller ECM2, and the engine controller ECM2 controls the fuel injection of the engine and regulates the output speed and the torque of the engine. On the other hand, the excavator controller ECM1 controls the main pump displacement variation. Since the excavator controller ECM1 controls the engine earlier than the main pump, the engine has changed fuel injection earlier when the main pump responds, which effectively reduces engine speed fluctuations and shortens the recovery time after the speed fluctuations. The specific control process is specifically explained by the following engine fuel injection torque control method based on load identification, and the control comprises the following steps:
(1) the pilot handle output pressure signal or the voltage signal is sent to the excavator controller ECM1 through a CAN bus, the excavator controller ECM1 calculates the predicted required power and torque according to the pilot handle signal through a prestored algorithm, namely the corresponding relation between the pilot handle output signal and the power, and sends the power and torque values to the engine controller ECM2 through the CAN bus, the engine controller ECM2 prestores the relation between the fuel injection quantity of the engine and the output rotating speed, the output power and the torque, and controls the engine to change the fuel injection quantity through the relation curve of the engine power, the torque and the fuel injection quantity so as to change the output power and the torque of the engine;
(2) the excavator controller ECM1 calculates an output current signal for controlling the main pump displacement based on the input pilot handle signal.
(3) The torque and power demand output signals of the excavator controller ECM1 to the engine controller ECM2 are earlier than the displacement control output signals of the ECM1 to the main pump.
According to the control method, on one hand, the estimated power and torque are accurately calculated according to the output signal of the pilot handle, the estimated value is closer to the true value, after the ECM2 adjusts the fuel injection quantity, the output power and torque are higher in matching degree with the power and torque required by the main pump, and the engine speed fluctuation is smaller. On the other hand, according to the response time of the engine and the main pump, the time difference between the control signal of the excavator controller ECM1 to the engine and the control signal of the excavator controller ECM1 to the main pump is reasonably controlled, so that the engine and the main pump are accurately matched, and the rotation speed fluctuation is reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes which can be made within the knowledge of those skilled in the art without departing from the gist of the present invention are within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides an engine fuel injection torque control system based on load discernment which characterized in that: including a pilot handle, an excavator controller ECM1, an engine controller ECM2, and a main pump; the pilot handle is connected to the excavator controller ECM1 via a CAN bus, and the excavator controller ECM1 is connected to the engine controller ECM2 via a CAN bus; the excavator controller ECM1 is connected to the main pump by a control line.
2. The system of claim 1, wherein the engine pre-injection torque control based on load identification is further characterized by: the pilot handle is a hydraulic handle.
3. The system of claim 1, wherein the engine pre-injection torque control based on load identification is further characterized by: the pilot handle is an electric control handle.
4. A method for controlling the pre-injection torque of an engine based on load identification is characterized by comprising the following steps:
(1) the pilot handle output signal is sent to the excavator controller ECM1 through a CAN bus, the excavator controller ECM1 calculates the predicted required power and torque through the pilot handle signal and sends the power and torque values to the engine controller ECM2 through the CAN bus, and the engine controller ECM2 controls the engine to change the fuel injection quantity through the characteristic curve of the engine power, the torque and the fuel injection quantity so as to realize the change of the engine output power and the torque;
(2) the excavator controller ECM1 calculates an output current signal for controlling the displacement of the main pump according to the input pilot handle signal;
(3) the torque and power demand output signals of the excavator controller ECM1 to the engine controller ECM2 are earlier than the displacement control output signals of the ECM1 to the main pump.
5. The method of claim 4, wherein the excavator controller ECM1 calculates the estimated power and torque from the pilot handle output signal using a pre-stored algorithm.
6. The method of claim 4, wherein the engine controller ECM2 prestores relationships between engine fueling and output speed, output power, and torque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170405.XA CN112901358A (en) | 2021-02-08 | 2021-02-08 | Engine pre-fuel injection torque control system and method based on load identification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170405.XA CN112901358A (en) | 2021-02-08 | 2021-02-08 | Engine pre-fuel injection torque control system and method based on load identification |
Publications (1)
| Publication Number | Publication Date |
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| CN112901358A true CN112901358A (en) | 2021-06-04 |
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| CN202110170405.XA Pending CN112901358A (en) | 2021-02-08 | 2021-02-08 | Engine pre-fuel injection torque control system and method based on load identification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833051A (en) * | 2021-10-29 | 2021-12-24 | 徐州徐工矿业机械有限公司 | Hydraulic excavator rotating speed adjusting and testing system and method based on engine ADTC (active control system) active control function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011488A (en) * | 2002-06-05 | 2004-01-15 | Hitachi Constr Mach Co Ltd | Engine control device for construction machinery |
| CN101818508A (en) * | 2010-04-19 | 2010-09-01 | 三一重机有限公司 | Power control system and method of excavator |
| JP2013040487A (en) * | 2011-08-16 | 2013-02-28 | Hitachi Constr Mach Co Ltd | Work machine |
| CN110644564A (en) * | 2019-09-11 | 2020-01-03 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator control system and method |
| CN111255006A (en) * | 2020-01-20 | 2020-06-09 | 广西玉柴重工有限公司 | Excavator hydraulic pump and engine integrated synchronous control method and device |
-
2021
- 2021-02-08 CN CN202110170405.XA patent/CN112901358A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011488A (en) * | 2002-06-05 | 2004-01-15 | Hitachi Constr Mach Co Ltd | Engine control device for construction machinery |
| CN101818508A (en) * | 2010-04-19 | 2010-09-01 | 三一重机有限公司 | Power control system and method of excavator |
| JP2013040487A (en) * | 2011-08-16 | 2013-02-28 | Hitachi Constr Mach Co Ltd | Work machine |
| CN110644564A (en) * | 2019-09-11 | 2020-01-03 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator control system and method |
| CN111255006A (en) * | 2020-01-20 | 2020-06-09 | 广西玉柴重工有限公司 | Excavator hydraulic pump and engine integrated synchronous control method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833051A (en) * | 2021-10-29 | 2021-12-24 | 徐州徐工矿业机械有限公司 | Hydraulic excavator rotating speed adjusting and testing system and method based on engine ADTC (active control system) active control function |
| CN113833051B (en) * | 2021-10-29 | 2023-08-29 | 徐州徐工矿业机械有限公司 | Hydraulic excavator rotating speed adjusting and testing system and method based on ADTC active control function of engine |
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Application publication date: 20210604 |
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