CN115929529A - Engine ignition device for methanol fuel vehicle, starting method and methanol fuel vehicle - Google Patents
Engine ignition device for methanol fuel vehicle, starting method and methanol fuel vehicle Download PDFInfo
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- CN115929529A CN115929529A CN202310044600.7A CN202310044600A CN115929529A CN 115929529 A CN115929529 A CN 115929529A CN 202310044600 A CN202310044600 A CN 202310044600A CN 115929529 A CN115929529 A CN 115929529A
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Abstract
The invention discloses an engine ignition device for a methanol fuel vehicle, a starting method and the methanol fuel vehicle, wherein the engine ignition device for the methanol fuel vehicle comprises an engine cylinder body, a main spark plug and a pre-burning spark plug which are arranged on the engine cylinder body, the pre-burning spark plug comprises a pre-burning shell and a first heating device arranged on the pre-burning shell, the first heating device is used for heating a pre-burning chamber of the pre-burning shell, a plurality of spray holes are uniformly arranged at the bottom of the pre-burning shell along the circumferential direction at intervals, the engine ignition device for the methanol fuel vehicle also comprises a second heating device arranged at the communication position of an air inlet main pipe and an air inlet manifold, and the second heating device is used for heating gas in the air inlet main pipe and the air inlet manifold. The device can be suitable for vehicles using methanol as fuel, can effectively improve the phenomenon of difficulty in cold start of the engine, can effectively reduce the energy consumption of the engine during cold start, and can effectively improve the running stability of the engine.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an engine ignition device for a methanol fuel vehicle, a starting method and the methanol fuel vehicle.
Background
The methanol has the advantages of rich raw material sources, mature production process, good combustion performance, less pollutant discharge, low production cost, convenient transportation and storage and the like, so the methanol is regarded as one of the most potential alternative fuels for vehicles by people. However, the latent heat of vaporization of methanol is large as compared with gasoline, which is substantially 3.7 times that of gasoline, and specifically, when the temperature of methanol and gasoline is 20 ℃, the vaporization amount of methanol fuel is only 1/4 of that of gasoline, and when the temperature of methanol is 7 ℃, the vaporization amount of methanol fuel is 1/6 of that of 20 ℃, so the vaporization amount of methanol is greatly influenced by the temperature.
The prior art ignition device for an engine has a pre-ignition spark plug and a main spark plug, wherein the pre-ignition spark plug is mainly used for normal ignition, and the main spark plug is used for improving cold start. However, this engine ignition device is not suitable for a methanol-fueled engine, and the starting method is not suitable for a methanol-fueled vehicle.
Disclosure of Invention
The invention aims to provide an engine ignition device for a methanol fuel vehicle, a starting method and the methanol fuel vehicle, which aim to solve the problem that the engine ignition device in the prior art cannot be applied to the vehicle using methanol as fuel.
In order to achieve the purpose, the invention adopts the following technical scheme:
methanol fuel vehicle engine ignition, methanol fuel vehicle engine ignition includes the engine cylinder body, and set up in the main spark plug and the pre-burning spark plug of engine cylinder body, pre-burning spark plug including pre-burning casing and set up in the first heating device of pre-burning casing, first heating device is used for heating the precombustion chamber of pre-burning casing, the bottom of pre-burning casing is equipped with a plurality of orifices along the even interval of circumference, methanol fuel vehicle engine ignition still including setting up the second heating device in intake manifold and intake manifold's intercommunication department, second heating device is used for heating intake manifold with the gas in the intake manifold.
Preferably, the first heating device comprises a resistance wire, the resistance wire is integrally formed in the pre-combustion shell, and an insulating layer is arranged on the peripheral surface of the resistance wire.
Preferably, the resistance wire is spirally wound in the pre-combustion shell.
Preferably, the engine block is provided with two intake valves and two exhaust valves, the two intake valves and the two exhaust valves are distributed at intervals along a first direction, the two intake valves are arranged at intervals along a second direction, the two exhaust valves are also arranged at intervals along the second direction, and the first direction and the second direction are perpendicular to each other and are perpendicular to the height direction of the engine block;
the pre-ignition spark plugs and the main spark plugs are distributed at intervals along the first direction, the pre-ignition spark plugs and the main spark plugs are distributed on a first symmetrical axis of the cross section of the engine cylinder body, the pre-ignition spark plugs are close to the side of the air inlet valve relative to the main spark plugs, and the first symmetrical axis is parallel to the first direction.
Preferably, a distance between the pre-ignition spark plug and a second axis of symmetry of the cross section of the engine block is in a range L1, a distance between the main spark plug and the second axis of symmetry of the cross section of the engine block is in a range L2, L1 < L2, and the second axis of symmetry is parallel to the second direction.
Preferably, the volume of the precombustion chamber is in the range of 1000mm 3 ～1500mm 3 。
Preferably, the aperture range of the spray hole is 1.2 mm-2 mm; the range of the spiral angle of the jet hole is 0-5 degrees.
The starting method of the methanol fuel vehicle is used for controlling the ignition device of the engine for the methanol fuel vehicle, and comprises the following steps:
s100, judging whether the engine is in cold start or not according to the ambient temperature; wherein the engine start comprises a cold start and a normal start;
if the engine is started in a cold state, executing step S200;
s200, starting a first heating device; starting a second heating device;
s300, after a first set time period, closing the first heating device and the second heating device, and starting an engine;
s400, igniting the pre-ignition spark plug;
s500, judging whether the engine is started or not according to the rotating speed of the engine;
if the engine is started, sequentially executing steps S600 and S700;
if the engine is not started, returning to execute the step S200 until the engine is started;
s600, stopping ignition after the pre-ignition spark plug operates for a second set time period;
and S700, igniting the main spark plug.
Preferably, the specific step of judging whether the engine is cold started or not at the time of starting the engine according to the ambient temperature includes:
judging whether the environment temperature is less than or equal to a set temperature;
if the environment temperature is less than or equal to the set temperature, the engine is started in a cold state;
and if the ambient temperature is higher than the set temperature, the engine is normally started when being started.
Preferably, the set temperature is 16 ℃.
Preferably, the first set time period is equal to or longer than 5 seconds.
Preferably, the second set time period is 7 seconds or longer.
Preferably, if the engine is normally started at the time of starting, step S800 is executed;
s800, starting an engine;
and S900, igniting the main spark plug.
Preferably, the following steps are further included after step S700 and step S900:
s1000, judging whether the engine rotating speed and the engine torque are normal or not;
if the engine rotating speed and the engine torque are normal, the engine runs normally, and step S1100 is executed;
if one of the engine speed and the engine torque is abnormal, executing step S1200;
s1100, operating the main spark plug, and outputting a 'normal ignition of the main spark plug' signal;
and S1200, operating the pre-combustion spark plug, and outputting a main spark plug ignition abnormity signal.
Preferably, the specific steps of determining whether the engine speed and the engine torque are normal include:
judging whether the engine rotating speed is increased and the engine torque is increased after the main spark plug is ignited;
if the engine speed is increased, the engine speed is normal;
if the engine torque is increased, the engine torque is normal.
The methanol fuel vehicle comprises the ignition device of the engine for the methanol fuel vehicle.
The invention has the beneficial effects that:
the invention aims to provide an engine ignition device for a methanol fuel vehicle, a starting method and the methanol fuel vehicle.
The methanol fuel vehicle engine ignition device judges whether the engine is cold started or not when the engine is started according to the ambient temperature, if the engine is cold started when the engine is started, the first heating device and the second heating device are synchronously started, the pre-combustion chamber of the pre-combustion shell is heated through the first heating device, the mixed gas in the air inlet main pipe is heated through the second heating device, and the air in the air inlet manifold is heated.
Drawings
FIG. 1 is a cross-sectional view of a pre-ignition spark plug of a methanol fueled vehicular engine ignition device, taken from a first perspective, according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a pre-ignition plug of a methanol fueled vehicular engine ignition device, taken from a second perspective, in accordance with an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an ignition device of an engine for a methanol-fueled vehicle according to an embodiment of the present invention;
FIG. 4 is a first flowchart of a methanol fuel vehicle startup method provided by an embodiment of the present invention;
FIG. 5 is a flow chart of a methanol fuel vehicle startup method according to an embodiment of the present invention.
In the figure:
1. an engine block; 11. an intake valve; 12. an exhaust valve; 13. a first axis of symmetry; 14. a second axis of symmetry;
2. a main spark plug;
3. a pre-ignition spark plug; 31. a pre-combustion housing; 32. a precombustion chamber; 33. spraying a hole; 34. an electrode;
4. resistance wire.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.
In the prior art, an engine ignition device adopts a pre-ignition spark plug and a main spark plug, wherein the pre-ignition spark plug is mainly used for normal ignition, and the main spark plug is used for improving cold start. However, this engine ignition device is not suitable for a methanol-fueled engine, and the starting method is not suitable for a methanol-fueled vehicle.
Therefore, the present invention provides an ignition device of an engine for a methanol fuel vehicle, as shown in fig. 1-3, the ignition device of an engine for a methanol fuel vehicle comprises an engine cylinder 1, a main spark plug 2 and a pre-ignition spark plug 3 which are arranged on the engine cylinder 1, the pre-ignition spark plug 3 comprises a pre-ignition housing 31 and a first heating device arranged on the pre-ignition housing 31, the first heating device is used for heating a pre-combustion chamber 32 of the pre-ignition housing 31, a plurality of spray holes 33 are uniformly arranged at intervals along the circumferential direction on the bottom of the pre-ignition housing 31, the ignition device of an engine for a methanol fuel vehicle further comprises a second heating device arranged at the communication part of an intake manifold and the intake manifold, and the second heating device is used for heating the gas in the intake manifold and the intake manifold.
The methanol fuel vehicle engine ignition device judges whether the engine is cold-started or not when the engine is started according to the ambient temperature, if the engine is cold-started when the engine is started, a first heating device and a second heating device are synchronously started, a pre-combustion chamber 32 of a pre-combustion shell 31 is heated through the first heating device, mixed gas in an air inlet main pipe is heated through the second heating device, and air in an air inlet manifold is heated, after the mixed gas is heated for a period of time, the first heating device and the second heating device are closed, and the engine is started, wherein the heating time is enough to enable the temperature in the pre-combustion chamber 32 of the pre-combustion shell 31 to be increased to a certain temperature, the mixed gas flowing into an engine cylinder 1 can also be heated, and it can be understood that the mixed gas flowing into the engine cylinder 1 can enter the pre-combustion chamber 32 through an injection hole 33 on the pre-combustion shell 31, the volume of the pre-combustion chamber 32 is small, the temperature of the mixed gas in the pre-combustion chamber 32 and the mixed gas in the pre-combustion chamber 32 is high, the mixed gas is ignited through the ignition plug 3, the mixed gas in the pre-combustion chamber 32 and the mixed gas can be ignited, and the engine can effectively run, and the energy consumption can be effectively improved when the engine is effectively improved, and the engine is started, and the engine can be re-ignited by the main engine. In this embodiment, the second heating device is a grid heating device.
As shown in fig. 1 and fig. 2, the first heating device includes a resistance wire 4, the resistance wire 4 is integrally formed in the precombustion housing 31, and an insulating layer is disposed on an outer peripheral surface of the resistance wire 4. The resistance wire 4 is integrally formed in the pre-combustion shell 31, so that the resistance wire 4 can synchronously heat the pre-combustion shell 31 and the pre-combustion chamber 32, the temperature in the pre-combustion chamber 32 can be quickly raised, and the phenomenon that the volume of the pre-combustion spark plug 3 is increased due to the arrangement of the first heating device can be avoided; secondly, the outer peripheral surface of the resistance wire 4 is provided with an insulating layer to avoid the electricity leakage of the resistance wire 4 to cause the electrification of the pre-combustion shell 31 and/or the engine cylinder body 1, so as to improve the reliability of the engine ignition device for the methanol fuel vehicle.
Specifically, as shown in fig. 1, the pre-combustion spark plug 3 further includes an electrode 34 fixedly disposed in the pre-combustion housing 31, and the electrode 34 and the nozzle holes 33 are respectively distributed at two ends of the pre-combustion housing 31 in the height direction. It will be appreciated that ignition is by electrode 34. Wherein the ef direction in fig. 1 is the height direction of the pre-combustion housing 31.
More specifically, the resistance wire 4 is wound in a spiral shape in the precombustion casing 31. So set up, can increase the length that resistance wire 4 set up in precombustion casing 31 for precombustion casing 31 and precombustion chamber 32 can be heated fast, and can make the equal even being heated of precombustion casing 31 and precombustion chamber 32.
As shown in fig. 3, the engine cylinder 1 is provided with two intake valves 11 and two exhaust valves 12, the two intake valves 11 and the two exhaust valves 12 are distributed at intervals along a first direction, the two intake valves 11 are arranged at intervals along a second direction, the two exhaust valves 12 are also arranged at intervals along the second direction, and the first direction and the second direction are perpendicular to each other and are perpendicular to the height direction of the engine cylinder 1; the pre-ignition spark plug 3 and the main spark plug 2 are distributed at intervals along a first direction, the pre-ignition spark plug 3 and the main spark plug 2 are distributed on a first symmetrical shaft 13 of the section of the engine block 1, the pre-ignition spark plug 3 is close to the air inlet valve 11 side relative to the main spark plug 2, and the first symmetrical shaft 13 is parallel to the first direction. It is understood that the two intake valves 11 and the two exhaust valves 12 are evenly spaced in this order in the circumferential direction of the engine block 1. Because the temperature near the exhaust valve 12 is high, and under the condition that the main spark plug 2 of the mixture distributed near the exhaust valve 12 is not ready to ignite, the phenomenon of spontaneous combustion occurs under the action of the temperature near the exhaust valve 12, and the phenomenon can cause the phenomenon of detonation in the engine cylinder body 1, the pre-ignition spark plug 3 is arranged close to the intake valve 11 side relative to the main spark plug 2, and it can be understood that the main spark plug 2 is close to the exhaust valve 12, so that the arrangement can effectively shorten the distance of flame propagation to the exhaust valve 12 side, and further effectively improve the phenomenon of detonation in the engine cylinder body 1.
Wherein the ab direction in fig. 3 is a first direction; the cd direction in fig. 3 is the second direction. The first direction is parallel to the first axis of symmetry 13; the second direction is parallel to the second axis of symmetry 14.
Specifically, as shown in fig. 3, the distance between the pilot spark plug 3 and the second axis of symmetry 14 of the cross section of the engine block 1 is L1, the distance between the main spark plug 2 and the second axis of symmetry 14 of the cross section of the engine block 1 is L2, L1 < L2, and the second axis of symmetry 14 is parallel to the second direction. It can be understood that the linear distance between the main ignition plug 2 and the exhaust valve 12 is smaller than the linear distance between the pre-ignition plug 3 and the intake valve 11, so that the distance for flame to propagate to the exhaust valve 12 side is shortened, and the phenomenon of knocking occurring in the engine block 1 is effectively improved.
Specifically, in the present embodiment, the volume of the prechamber 32 ranges from 1000mm 3 ～1500mm 3 . It will be appreciated that the volume of the prechamber 32 is much smaller than the volume of the engine block 1, so that ignition by the prechamber plug 3 is possible quicklyThe mixture in the precombustion chamber 32 is ignited at high speed and efficiently, the ignited mixture in the precombustion chamber 32 is sprayed into the engine cylinder body 1 through the spray holes 33 to ignite the mixture in the engine cylinder body 1, so that the phenomenon of difficult cold start of the engine can be effectively improved, and the energy consumption of the engine during cold start can be effectively reduced.
More specifically, in the present embodiment, the aperture of the nozzle hole 33 ranges from 1.2mm to 2mm; the range of the spiral angle of the nozzle hole 33 is 0 to 5 °. Preferably, in the present embodiment, the helix angle of the nozzle hole 33 is 0 °. It is understood that the air-fuel mixture burned in the precombustion chamber 32 is injected into the engine block 1 along the center axis of the injection hole 33. In the present embodiment, it is exemplified that three nozzle holes 33 are provided.
The ignition device of the engine for the methanol fuel vehicle further comprises a controller, and the controller is electrically connected with the electrode 34 of the pre-ignition spark plug 3, the resistance wire 4 of the first heating device, the second heating device and the main spark plug 2. The controller can control the operation of the electrode 34 of the pre-ignition spark plug 3, the resistance wire 4 of the first heating device, the second heating device and the main spark plug 2.
Specifically, this automobile-used engine ignition of methanol fuel still includes the temperature sensor who sets up in the automobile body, and temperature sensor is connected with the controller electricity, and temperature sensor is used for monitoring ambient temperature. The controller controls the first heating device, the second heating device, the electrode 34 of the pre-ignition plug 3, and the main ignition plug 2 to operate according to the electric signal generated by the temperature sensor.
The specific structure of the main spark plug 2 belongs to the prior art, and is not described herein again.
The invention also provides a starting method of the methanol fuel vehicle, which is used for controlling the ignition device of the engine for the methanol fuel vehicle to ignite the engine. The phenomenon that the engine is difficult to start in a cold mode can be effectively improved, energy consumption of the engine in the cold mode can be effectively reduced, and running stability of the engine can be effectively improved.
As shown in fig. 4 and 5, the methanol fuel vehicle starting method includes:
s100, judging whether the engine is in cold start or not according to the ambient temperature; wherein the engine start includes a cold start and a normal start.
Specifically, the specific step of judging whether the engine is cold started or not according to the ambient temperature includes:
and judging whether the ambient temperature is less than or equal to the set temperature.
And if the ambient temperature is less than or equal to the set temperature, the engine is cold started when started. Step S200 is performed.
If the ambient temperature is higher than the set temperature, the engine is normally started when being started. Step S800 is performed.
The set temperature is an empirical value obtained from a large number of previous experiments.
Specifically, in the present embodiment, the set temperature is 16 ℃.
S200, starting a first heating device; the second heating means is activated. It will be appreciated that the first heating means and the second heating means are activated simultaneously, the prechamber 32 of the prechamber housing 31 is heated by the first heating means, the mixture in the intake manifold is heated by the second heating means, and the air in the intake manifold is heated.
And S300, after the first set time period, closing the first heating device and the second heating device, and starting the engine.
Specifically, the first set time period is an empirical value obtained by a large number of experiments at an early stage.
Specifically, the first set time period is 5 seconds or longer. Preferably, in the present embodiment, the first set time period is 5 seconds.
It is understood that the first set time period is sufficient to raise the temperature in the precombustion chamber 32 of the precombustion housing 31 to a certain temperature, and also to heat the mixture flowing into the engine block 1, so that the mixture flowing into the precombustion chamber 32 through the nozzle of the precombustion housing 31 can be quickly changed into a high-temperature mixture, and the electrode 34 of the precombustion plug 3 can ignite the high-temperature mixture.
S400, the pre-ignition spark plug 3 ignites.
Specifically, because the volume of the precombustion chamber 32 is small, and the temperature in the precombustion chamber 32 is high under the heating of the first heating device, the mixture also enters the engine close cylinder after being heated by the second heating device, and then enters the precombustion chamber 32 through the jet holes 33 on the precombustion shell 31, so that the mixture in the precombustion chamber 32 can be ignited quickly and efficiently by the ignition of the precombustion spark plug 3, the ignited mixture in the precombustion chamber 32 can be injected into the engine cylinder 1 through the jet holes 33 to ignite the mixture in the engine cylinder 1, the phenomenon of difficult cold start of the engine can be effectively improved, and the energy consumption of the engine during cold start can be effectively reduced.
And S500, judging whether the engine is started or not according to the rotating speed of the engine.
The specific steps of judging whether the engine is started or not according to the rotating speed of the engine comprise:
and judging whether the rotating speed of the engine is greater than the set rotating speed or not.
If the engine speed is greater than the set speed, the engine is started. Steps S600 and S700 are performed in sequence.
If the engine speed is less than or equal to the set speed, the engine is not started. The execution returns to step S200 until the engine is started.
Specifically, in the present embodiment, the rotation speed is set to zero. When the engine speed is greater than zero, it indicates that the engine is started.
And S600, stopping ignition after the pre-ignition spark plug 3 operates for a second set time period.
Wherein the second set time period is an empirical value obtained by a large number of experiments in the early stage.
Specifically, the second set time period is 7 seconds or longer. Preferably, in the present embodiment, the second set time period is equal to 10 seconds.
And S700, igniting the main spark plug 2.
Specifically, the ignition is stopped after the pre-ignition spark plug 3 runs for a second set time period, the ignition is stopped through the main spark plug 2, the running of the engine can reach a stable state after the pre-ignition spark plug 3 runs for the second set time period, and at the moment, the normal ignition is carried out through the main spark plug 2, so that the running stability of the engine can be effectively improved.
Therefore, the ignition device of the engine for the methanol fuel vehicle is controlled by the starting method of the methanol fuel vehicle, so that the phenomenon that the engine is difficult to start in a cold state can be effectively improved, the energy consumption of the engine in the cold state can be effectively reduced, and the running stability of the engine can be effectively improved.
And S800, starting the engine.
And S900, igniting the main spark plug 2. It is understood that when the ambient temperature is higher than the set temperature, the engine is started normally, so that ignition is performed directly by the main ignition plug 2.
In which, as the main spark plug 2 continues to accumulate during the use period, the vicinity of the electrode of the main spark plug 2 is easily deposited with carbon and coked, which may cause the main spark plug 2 to malfunction, thereby causing ignition failure, so for this phenomenon, as shown in fig. 5, the methanol fuel vehicle starting method further includes the following steps after step S700 and step S900:
and S1000, judging whether the engine rotating speed and the engine torque are normal or not.
If the engine speed and the engine torque are normal, the engine operates normally, and step S1100 is executed.
If there is an abnormality in the engine speed and the engine torque, step S1200 is executed.
Specifically, the specific steps of determining the engine speed and the engine torque include:
it is judged whether or not the engine speed is increased and the engine torque is increased after the ignition of the main ignition plug 2.
If the engine speed is increased, the engine speed is normal.
If the engine torque increases, the engine torque is normal.
It can be understood that the engine speed and the engine torque are both representative quantities of the cylinder pressure in the engine cylinder block 1, and whether the cylinder pressure in the engine cylinder block 1 is normal can be effectively determined by determining whether the engine speed and the engine torque are normal.
Specifically, after the main spark plug 2 is ignited, the engine speed and the engine torque are both increased, the engine operates normally, the main spark plug 2 can ignite normally, and the cylinder pressure in the engine cylinder body 1 is normal; if one of the engine speed and the engine torque is not increased, the engine is not operated normally, which indicates that the ignition of the main spark plug 2 is abnormal, and at this time, the cylinder pressure in the engine cylinder block 1 is not normal, i.e., the cylinder pressure in the engine cylinder block 1 does not reach the desired value.
And S1200, operating the pre-ignition spark plug 3 and outputting a main spark plug ignition abnormity signal.
It can be understood that the pre-ignition plug chamber 3 serves as a backup spark plug, and the ignition by the pre-ignition plug 3 is performed after the failure of the main spark plug 2, so that the engine can continue to operate, thereby enhancing the operational reliability of the engine. And secondly, a signal of 'abnormal ignition of the main spark plug' is output, so that a driver can conveniently maintain or replace the main spark plug 2 in time according to the signal prompt.
And S1100, operating the main spark plug 2 and outputting a 'main spark plug normal ignition' signal.
The invention also provides a methanol fuel vehicle which comprises the engine ignition device for the methanol fuel vehicle. The methanol fuel vehicle starting method controls the ignition device of the engine for the methanol fuel vehicle to start the vehicle, can effectively improve the phenomenon of difficult cold start of the engine, can effectively reduce the energy consumption of the engine during cold start, and can effectively improve the running stability of the engine.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (16)
1. The automobile-used engine ignition of methyl alcohol fuel device, characterized in that, automobile-used engine ignition of methyl alcohol fuel includes engine cylinder body (1), and set up in main spark plug (2) and the spark plug (3) that preburns of engine cylinder body (1), preburns (3) including preburning casing (31) and set up in the first heating device of preburning casing (31), first heating device is used for heating preburning chamber (32) of casing (31), the bottom of preburning casing (31) is equipped with a plurality of orifice (33) along circumference even interval, automobile-used engine ignition of methyl alcohol fuel device still includes the second heating device who sets up in intake manifold and intake manifold's intercommunication department, the second heating device is used for heating intake manifold with the gas in the intake manifold.
2. The ignition device of the engine for the methanol fuel vehicle as claimed in claim 1, wherein the first heating device comprises a resistance wire (4), the resistance wire (4) is integrally formed in the pre-combustion housing (31), and an insulating layer is arranged on the outer peripheral surface of the resistance wire (4).
3. The ignition device of an engine for a methanol-fueled vehicle according to claim 2, wherein the resistance wire (4) is spirally wound inside the pre-combustion housing (31).
4. The ignition device of the methanol fuel vehicle engine according to claim 1, wherein the engine cylinder (1) is provided with two intake valves (11) and two exhaust valves (12), the two intake valves (11) and the two exhaust valves (12) are distributed at intervals along a first direction, the two intake valves (11) are arranged at intervals along a second direction, the two exhaust valves (12) are also arranged at intervals along the second direction, and the first direction and the second direction are perpendicular to each other and are perpendicular to the height direction of the engine cylinder (1);
the pre-ignition spark plugs (3) and the main spark plug (2) are distributed at intervals along the first direction, the pre-ignition spark plugs (3) and the main spark plug (2) are distributed on a first symmetry axis (13) of the cross section of the engine cylinder body (1), the pre-ignition spark plugs (3) are close to the side of the air inlet valve (11) relative to the main spark plug (2), and the first symmetry axis (13) is parallel to the first direction.
5. The methanol-fueled vehicular engine ignition device according to claim 4, characterized in that a distance between the pre-ignition plug (3) and the second axis of symmetry (14) of the cross section of the engine block (1) is in a range of L1, a distance between the main ignition plug (2) and the second axis of symmetry (14) of the cross section of the engine block (1) is in a range of L2, L1 < L2, and the second axis of symmetry (14) is parallel to the second direction.
6. The methanol fueled vehicle engine ignition device of claim 1, wherein the pre-chamber (32) has a volume in the range of 1000mm 3 ～1500mm 3 。
7. The ignition device of an engine for a methanol fuel vehicle according to claim 1, characterized in that the aperture of the nozzle hole (33) ranges from 1.2mm to 2mm; the range of the spiral angle of the jet hole (33) is 0-5 degrees.
8. A methanol fuel vehicle startup method for controlling the methanol fuel vehicle engine ignition device according to any one of claims 1 to 7, the methanol fuel vehicle startup method comprising:
s100, judging whether the engine is in cold start or not according to the ambient temperature; wherein the engine start comprises a cold start and a normal start;
if the engine is started in a cold state, executing step S200;
s200, starting a first heating device; starting the second heating device;
s300, after a first set time, closing the first heating device and the second heating device, and starting an engine;
s400, igniting the pre-ignition spark plug (3);
s500, judging whether the engine is started or not according to the rotating speed of the engine;
if the engine is started, sequentially executing steps S600 and S700;
if the engine is not started, returning to execute the step S200 until the engine is started;
s600, stopping ignition after the pre-ignition spark plug (3) operates for a second set time period;
s700, igniting the main spark plug (2).
9. The method of claim 8, wherein the step of determining whether the engine is cold started based on ambient temperature comprises:
judging whether the environment temperature is less than or equal to a set temperature;
if the environment temperature is less than or equal to the set temperature, the engine is in cold start when being started;
and if the ambient temperature is higher than the set temperature, the engine is normally started when being started.
10. A methanol fuel vehicle start-up method according to claim 9, characterized in that the set temperature is 16 ℃.
11. The methanol fuel vehicle startup method of claim 8, wherein the first set time period is greater than or equal to 5 seconds.
12. The methanol fuel vehicle startup method of claim 8, wherein the second set time period is greater than or equal to 7 seconds.
13. The methanol fuel vehicle startup method of claim 8,
if the engine is normally started when being started, executing step S800;
s800, starting an engine;
and S900, igniting the main spark plug (2).
14. A methanol fuel vehicle startup method according to claim 13, further comprising the steps after both step S700 and step S900 of:
s1000, judging whether the engine rotating speed and the engine torque are normal or not;
if the engine rotating speed and the engine torque are normal, the engine runs normally, and step S1100 is executed;
if one of the engine speed and the engine torque is abnormal, executing step S1200;
s1100, operating the main spark plug (2) and outputting a 'main spark plug normal ignition' signal;
and S1200, operating the pre-combustion spark plug (3) and outputting a main spark plug ignition abnormity signal.
15. The methanol fuel vehicle starting method as claimed in claim 14, wherein the step of determining whether the engine speed and the engine torque are normal comprises:
judging whether the engine rotating speed is increased and the engine torque is increased after the main spark plug (2) is ignited;
if the engine speed is increased, the engine speed is normal;
if the engine torque is increased, the engine torque is normal.
16. A methanol fuel vehicle characterized by comprising the methanol fuel vehicle engine ignition device according to any one of claims 1 to 7.
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