CN201321901Y - Injection timing signal device of electronic injection natural gas engine - Google Patents
Injection timing signal device of electronic injection natural gas engine Download PDFInfo
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- CN201321901Y CN201321901Y CNU2008201297142U CN200820129714U CN201321901Y CN 201321901 Y CN201321901 Y CN 201321901Y CN U2008201297142 U CNU2008201297142 U CN U2008201297142U CN 200820129714 U CN200820129714 U CN 200820129714U CN 201321901 Y CN201321901 Y CN 201321901Y
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Abstract
An injection timing signal device of an electronic injection natural gas engine modified from a diesel engine comprises a signal gear which lacks at least one tooth and serves as a timing signal source, and a timing signal induction sensor for sensing signals of the missed tooth; the sensing end of the sensor faces towards the signal gear, keeps an appropriate clearance with the outermost side of the signal gear, and is electrically connected with a control ECU of the work system of the electronic injection natural gas engine modified from the diesel engine. the injection timing signal device is formed after achieving improvements on a high-voltage ejector pump speed governor of the original diesel engine as follows: the main shaft of the speed governor is modified to be a new main shaft suitable for mounting the signal gear which is mounted on the new main shaft; due to utilization of the principle that a crankshaft of the original diesel engine rotates two cycles while the output shaft of the speed governor rotates one cycle, the injection timing signal device of the electronic injection natural gas engine provided by the utility model can acquire timing signals and cylinder determining signals directly, thereby eliminating a cylinder determining sensor.
Description
Technical field
The utility model belongs to technical field of automotive electronics, relates to a kind of electric-controlled natural gas engine operating system that is used to reequip diesel engine, especially its injection timing telltale.
Background technique
Along with the development of auto electronic control technology, also it goes up employing electronic control work system to natural gas engine at present, is called electric-controlled natural gas engine operating system.
The rock gas main component is CH4, is the high-quality clean fuel, and rock gas need not complicated extractive process when producing, need not additive just can use, so low price; The outstanding advantage of rock gas be burn very complete, the waste gas of discharging is cleaner, can satisfy more and more stricter emission regulation demands, rather useful to environment purification, the greenhouse effect that combustion of natural gas produced are 54% of oil, the burning back does not have flue dust substantially, and other toxic discharge also is minimum.
Because rock gas has above-mentioned advantage, have at present former diesel engine, comprise carburetor type with the EFI formula, repack the demand of electric-controlled natural gas engine into.In retrofit process, can run into following problem: because the combustion characteristic of rock gas and diesel oil itself has very big difference.We know, diesel engine generally be by Injection Pump and oil injecting nozzle diesel oil is directly sprayed into cylinder and in cylinder after compression even air mix, spontaneous combustion under high temperature, high pressure promotes the piston work done.People are referred to as compression ignition engine usually to this motor.One high-pressure injection pump speed regulator is structurally arranged, perhaps be called gearbox, be used to increase the diesel oil pressure in the jet pump.In the diesel engine working procedure, the main shaft of this speed regulator is by the engine crankshaft transmission, and velocity ratio is 1: 2, and promptly bent axle changeed for 2 weeks, and the speed regulator main shaft changeed for 1 week.
Become inflammable mixture with air mixing and enter cylinder again and natural gas engine generally sprays into rock gas suction tude, through the work done of plug ignition burning expansion.People claim that usually it is a spark-ignition engine.Natural gas engine is furnished with high pressure tank, behind multi-step pressure reduction rock gas is sprayed into suction tude, has not needed this speed regulator on function.Prior art generally adopts the scheme of crankshaft position sensor to provide the injection timing signal for engine control system, the signal gear that is provided with hypodontia promptly is installed on bent axle, perhaps crankshaft-flywheel is provided with the signal gear of hypodontia, magnetoelectric pulse signal sensor constantly detects the hypodontia signal, thereby constantly provides the injection timing signal for the ECU of engine control system.Yet because 2 weeks of crankshaft rotating, motor is just finished a work cycle, therefore must install additional and declare cylinder assembly, perhaps is cylinder identification sensor.
Crankshaft position sensor is a magnetoelectric pulse signal sensor, is also referred to as engine rotation speed sensor.Crankshaft position sensor is when engine running, tooth on the crankshaft-flywheel cuts the sensor magnetic line of force with groove with different distances, and by the sensor sensing coil, cause that its magnetic resistance of sensing changes, just because of this variable magnetic resistance, set up instantaneous alternating voltage signal at the two ends of coil, and directly output passes to ECU.The special burst signal that the operating special hypodontia of bent axle target wheel is produced will make ECU correctly judge the relatively accurate position of engine tope center, and then judge the accurate position of piston, and this signal is the important input Control Parameter of engine combustion control system.When bent axle rotated, the waveform of output signal and unit time variation of output signals rate directly reflected the rotational speed and the relatively rotation place of bent axle, and its frequency is directly proportional with the crankshaft rotating frequency.This signal has reflected the actual measurement rotating speed of motor, and exports to ECU.
Summary of the invention
The technical problems to be solved in the utility model is, at above-mentioned prior art present situation, provides a kind of technological scheme of utilizing the injection timing telltale of the EFI natural gas engine that former diesel engine high-pressure injection pump speed regulator repacks into.
The utility model solves the problems of the technologies described above by the following technical solutions:
The injection timing telltale that is used for the EFI natural gas engine that repacks into by diesel engine, comprise a signal gear as the timing signal source, described signal gear lacks a tooth at least as signal source, one timing induction of signal sensor as the described signal gear hypodontia of perception signal, described timing induction of signal sensor is fixedly mounted on the radial direction of described signal gear, its induction end is towards described signal gear, keep suitable gap with the outermost of described signal gear, and be electrically connected with the control ECU of the described EFI natural gas engine operating system that repacks into by diesel engine, it is characterized in that, the injection timing telltale of described EFI natural gas engine is former diesel engine high-pressure injection pump speed regulator to be achieved as follows improve afterwards and form, described speed regulator main shaft changes the new main shaft that is fit to install described signal gear into, described signal gear is installed on the new main shaft, and former velocity ratio to described speed regulator main shaft is constant from the motor main shaft.
For the sake of security, signal gear is installed in the outer fix of new main shaft, around it hard-wired protective housing is set, and timing induction of signal sensor is fixedly mounted on the described protective housing, and the protective housing relevant position is provided with the required sensing hole of inductive sensor.
Preferred as such scheme, the clearance distance b=2 ± 0.5mm between the outermost of described timing induction of signal sensor sensing end and described signal gear.
Preferred as such scheme, described signal gear lacks continuous bidentate as signal source.
Preferred as such scheme, the number of teeth of described signal gear is that 60 teeth lack continuous bidentates.
Perhaps, the number of teeth of described signal gear is that 36 teeth lack continuous bidentate or 38 teeth lack continuous bidentate.
Described timing induction of signal sensor is a magnetoelectric pulse signal sensor, comprises permanent magnet, coil, is positioned at the iron core of coil.
A kind of electric-controlled natural gas engine operating system that is used to reequip diesel engine comprises above-mentioned injection timing telltale.
A kind of natural gas engine that is repacked into by diesel engine comprises above-mentioned electric-controlled natural gas engine operating system.
The utility model utilizes former crankshaft of diesel engine to change for 2 weeks, the principle that the speed regulator output shaft circles, make full use of the idle parts high-pressure injection pump speed regulator on the former diesel engine, adopt the former speed regulator of repacking, configuration is fit to install the new main shaft of described signal gear, and signal gear is installed on the new main shaft of former diesel engine high-pressure jet pump speed regulator, disposes timing induction of signal sensor simultaneously, can directly obtain timing and declare cylinder signal, save cylinder identification sensor; Make full use of position, existing diesel engine space, signal gear is littler, weight is lighter, makes the natural gas engine more compact structure after the repacking, and outward appearance is more attractive in appearance, control is more reasonable.
Description of drawings
The injection timing telltale embodiment's of Fig. 1 EFI natural gas engine that former diesel engine high-pressure injection pump speed regulator repacks into for the utility model utilizes structural representation.
Fig. 2 is the injection timing telltale embodiment working principle schematic representation of the utility model EFI natural gas engine.
The signal curve schematic representation that Fig. 3 sends when working for the utility model injection timing telltale.
Fig. 4 is the internal structure schematic representation of the utility model magnetoelectric pulse signal sensor.
Among the figure: 1. main shaft, 2. signal gear, 3. protective housing, 4. timing induction of signal Sensor box, 41. permanent magnets, 42. iron cores, 43. coils, 5. sensing hole.
Embodiment
Below in conjunction with description of drawings performance of the present utility model, shown in Fig. 1-4, utilize the injection timing telltale embodiment of the EFI natural gas engine that former diesel engine high-pressure injection pump speed regulator repacks into for the utility model.
The EFI natural gas engine that the former diesel engine of utilizing the utility model repacks into.Because diesel engine is compression ignition engine, generally be by Injection Pump and oil injecting nozzle diesel oil is directly sprayed into cylinder and in cylinder after compression even air mix, spontaneous combustion under high temperature, high pressure promotes the piston work done.One high-pressure injection pump speed regulator is structurally arranged, perhaps be called gearbox, be used to increase the diesel oil pressure in the jet pump.In the diesel engine working procedure, the main shaft of this speed regulator is by the engine crankshaft transmission, and velocity ratio is 1: 2, and promptly bent axle changeed for 2 weeks, and the speed regulator main shaft changeed for 1 week.And natural gas engine is a spark-ignition engine, and generally rock gas being sprayed into suction tude becomes inflammable mixture with air mixing and enter cylinder again, through the work done of plug ignition burning expansion.Natural gas engine is furnished with high pressure tank, behind multi-step pressure reduction rock gas is sprayed into suction tude, has not needed this speed regulator on function.Prior art adopts the scheme of crankshaft position sensor to provide the injection timing signal for engine control system, the signal gear that is provided with hypodontia promptly is installed on bent axle, perhaps crankshaft-flywheel is provided with the signal gear of hypodontia, magnetoelectric pulse signal sensor constantly detects the hypodontia signal, thereby provides the injection timing signal for the ECU of engine control system does not continue.Yet because 2 weeks of crankshaft rotating, motor is just finished a work cycle, therefore must install additional and declare cylinder assembly, perhaps is cylinder identification sensor.So, the EFI natural gas engine that in a single day diesel engine repacks into by prior art, former diesel engine high-pressure injection pump speed regulator just becomes unnecessary refuse.Scheme of the present utility model makes full use of this refuse exactly, and utilize former crankshaft of diesel engine to change for 2 weeks, and the principle that the speed regulator output shaft circles, just in time synchronous with EFI natural gas engine work cycle, can directly obtain timing and declare cylinder signal, save a cylinder identification sensor.And make full use of position, existing diesel engine space, and signal gear is littler, weight is lighter, makes the natural gas engine more compact structure after the repacking, and outward appearance is more attractive in appearance, control is more reasonable.
Fig. 1 is the structural representation of present embodiment, the crude oil pump assembly keeps, signal gear 2 is installed on the pump governor main shaft 1, signal gear lacks a tooth at least as signal source, one timing induction of signal sensor 4 as the described signal gear hypodontia of perception signal, be fixedly mounted on the radial direction of described signal gear 2, its induction end is towards described signal gear 2, and keep suitable gap b with the outermost of described signal gear 2, and be electrically connected with the control ECU of the described EFI natural gas engine operating system that repacks into by diesel engine, it is former that velocity ratio to described speed regulator main shaft is constant from the motor main shaft.
Because general former jerk pump speed regulator main shaft 1 also is not suitable for installing signal gear 2, thus generally need redesign main shaft 1, to be fit to install signal gear 2.As preferred version, as shown in Figure 1, present embodiment is installed in signal gear 2 side of redesign main shaft 1.For safety, also solve simultaneously sensor 4 fixed installation problems, around the signal gear 2 a hard-wired protective housing 3 is set, timing induction of signal sensor 4 is fixedly mounted on the described protective housing 3, and protective housing 3 relevant positions are provided with inductive sensor 4 required sensing holes 5.The induction end of timing induction of signal sensor 4 should be tried one's best near the outermost increment face of signal gear 2, helps the inductive effects of sensor 4 like this; Certainly must guarantee when work, not run into the increment face of signal gear 2; Preferred the two clearance distance b=2 ± 0.5mm.
As shown in Figure 2, signal gear 2 adopts and lacks continuous bidentate as signal source, and the inductive effects of sensor 4 is better like this.Form distinctive signal angle a.The number of teeth of signal gear also should suit, and be preferably 60 teeth and lack continuous bidentate, or the scarce continuous bidentate of 36 teeth, or 38 teeth lack continuous bidentate.
As shown in Figure 4, timing induction of signal sensor 4 is a magnetoelectric pulse signal sensor, comprises permanent magnet 41, coil 43, is positioned at the iron core 42 of coil.
Timing induction of signal sensor 4 is when engine running, tooth on the signal gear 2 cuts the sensor magnetic line of force with groove with different distances, and by the sensor sensing coil, cause that its magnetic resistance of sensing changes, just because of this variable magnetic resistance, set up instantaneous alternating voltage signal at the two ends of coil, as shown in Figure 3, signal gear 2 lacks the formed distinctive signal of continuous bidentate angle a and form corresponding distinctive signal section a on this instantaneous alternating voltage signature tune line chart, and directly output passes to ECU.The special burst signal that signal gear 2 operating special hypodontias are produced will make ECU correctly judge the relatively accurate position of engine tope center, and then judge the accurate position of piston, and this signal is the important input Control Parameter of engine combustion control system.When bent axle rotated, the waveform of output signal and unit time variation of output signals rate directly reflected the rotational speed and the relatively rotation place of bent axle, and its frequency is directly proportional with the crankshaft rotating frequency.This signal has reflected the actual measurement rotating speed of motor, and exports to ECU.
Claims (9)
1, the injection timing telltale that is used for the EFI natural gas engine that repacks into by diesel engine, comprise a signal gear as the timing signal source, described signal gear lacks a tooth at least as signal source, one timing induction of signal sensor as the described signal gear hypodontia of perception signal, described timing induction of signal sensor is fixedly mounted on the radial direction of described signal gear, its induction end is towards described signal gear, keep suitable gap with the outermost of described signal gear, and be electrically connected with the control ECU of the described EFI natural gas engine operating system that repacks into by diesel engine, it is characterized in that, the injection timing telltale of described EFI natural gas engine is former diesel engine high-pressure injection pump speed regulator to be achieved as follows improve afterwards and form, described speed regulator main shaft changes the new main shaft that is fit to install described signal gear into, described signal gear is installed on the new main shaft, and former velocity ratio to described speed regulator main shaft is constant from the motor main shaft.
2, the injection timing telltale of EFI natural gas engine as claimed in claim 1, it is characterized in that, described signal gear is installed in the outer fix of new main shaft, one hard-wired protective housing is set around it, described timing induction of signal sensor is fixedly mounted on the described protective housing, and the protective housing relevant position is provided with the required sensing hole of described inductive sensor.
3, the injection timing telltale of EFI natural gas engine as claimed in claim 1 is characterized in that, the clearance distance b=2 ± 0.5mm between the outermost of described timing induction of signal sensor sensing end and described signal gear.
4, the injection timing telltale of EFI natural gas engine as claimed in claim 1 is characterized in that, described signal gear lacks continuous bidentate as signal source.
5, the injection timing telltale of EFI natural gas engine as claimed in claim 4 is characterized in that, the number of teeth of described signal gear is that 60 teeth lack continuous bidentate.
6, the injection timing telltale of EFI natural gas engine as claimed in claim 4 is characterized in that, the number of teeth of described signal gear is that 36 teeth lack continuous bidentate or 38 teeth lack continuous bidentate.
7, the injection timing telltale of EFI natural gas engine as claimed in claim 1 is characterized in that, described timing induction of signal sensor is a magnetoelectric pulse signal sensor, comprises permanent magnet, coil, is positioned at the iron core of coil.
8, a kind of electric-controlled natural gas engine operating system that is used to reequip diesel engine is characterized in that, comprises as each described injection timing telltale of claim 1 to 7.
9, a kind of natural gas engine that is repacked into by diesel engine is characterized in that, comprises electric-controlled natural gas engine operating system as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201297142U CN201321901Y (en) | 2008-12-18 | 2008-12-18 | Injection timing signal device of electronic injection natural gas engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201297142U CN201321901Y (en) | 2008-12-18 | 2008-12-18 | Injection timing signal device of electronic injection natural gas engine |
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| Publication Number | Publication Date |
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| CN201321901Y true CN201321901Y (en) | 2009-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201297142U Expired - Fee Related CN201321901Y (en) | 2008-12-18 | 2008-12-18 | Injection timing signal device of electronic injection natural gas engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511159A (en) * | 2013-10-06 | 2014-01-15 | 广西玉林卓越动力发电设备有限公司 | High-energy ignition system of gaseous propellant engine |
-
2008
- 2008-12-18 CN CNU2008201297142U patent/CN201321901Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511159A (en) * | 2013-10-06 | 2014-01-15 | 广西玉林卓越动力发电设备有限公司 | High-energy ignition system of gaseous propellant engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20101218 |