CN112483270A

CN112483270A - Control method and device for engine cylinder and engine

Info

Publication number: CN112483270A
Application number: CN202011344772.9A
Authority: CN
Inventors: 许帅; 袁文文; 王裕鹏
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-03-12
Anticipated expiration: 2040-11-25
Also published as: CN112483270B

Abstract

The application provides a control method and a control device for an engine cylinder and an engine, wherein the method comprises the following steps: receiving a first starting instruction; acquiring a starting temperature of the engine based on the first starting instruction; determining the starting oil quantity of the engine and the first maximum oil injection quantity of each of the M cylinders according to the starting temperature; determining the number of cylinders to be deactivated according to the starting oil quantity and the first maximum oil injection quantity of each cylinder; and when a second starting instruction is received, closing the corresponding number of cylinders from the M cylinders in sequence. By the method, the corresponding starting oil quantity can be determined according to the actual starting temperature of the engine, and the cylinder of the engine is controlled to ensure the oil injection quantity of a single cylinder, so that the ignition capability of the engine is improved, and the normal starting of the engine is ensured.

Description

Control method and device for engine cylinder and engine

Technical Field

The embodiment of the application relates to the technical field of engine control, in particular to a control method and device for an engine cylinder and an engine.

Background

The engine is a common power device, and the cylinder is an important component of the engine.

In the prior art, the starting oil quantity of the engine is usually preset according to a calibration working condition, but a certain difference usually exists between the actual working condition and the calibration working condition of the engine, and the starting oil quantity does not always meet the actual requirement of the engine, so that the normal starting of the engine is influenced. In addition, if the engine in the prior art includes a plurality of cylinders, when the engine starts up the oil mass for a certain time, it may cause the injected oil mass in the single cylinder to be less, and the engine is difficult to start on fire, and the normal start of the engine is also influenced.

Disclosure of Invention

The application provides a control method and device of an engine cylinder and an engine, which can determine the corresponding starting oil quantity according to the actual starting temperature of the engine and control the engine cylinder to ensure the oil injection quantity of a single cylinder, thereby improving the ignition capacity of the engine and ensuring the normal starting of the engine.

In a first aspect, the present application provides a method for controlling cylinders of an engine, which is applied to the engine, wherein the engine comprises M cylinders, and M is a positive integer greater than or equal to 2; the method comprises the following steps: receiving a first starting instruction; acquiring a starting temperature of the engine based on the first starting instruction; determining the starting oil quantity of the engine and the first maximum oil injection quantity of each of the M cylinders according to the starting temperature; determining the number of cylinders to be deactivated according to the starting oil quantity and the first maximum oil injection quantity of each cylinder; and when a second starting instruction is received, closing the corresponding number of cylinders from the M cylinders in sequence.

Optionally, determining the number of cylinders to be deactivated according to the starting oil amount and the first maximum oil injection amount of each cylinder, including: determining a first oil injection quantity corresponding to each of the M cylinders according to the starting oil quantity; and determining the number of cylinders needing to be deactivated according to the first oil injection quantity corresponding to each cylinder and the first maximum oil injection quantity of each cylinder.

The method combines the actual starting oil quantity of the engine and the first maximum oil injection quantity and the first oil injection quantity of each cylinder, so that on one hand, the engine is ensured to have enough starting oil quantity, on the other hand, the oil injection quantity of each cylinder started by the engine is ensured to be not greater than the maximum oil injection quantity, the cylinders can work normally, and the engine can work normally.

Optionally, determining the number of cylinders to be deactivated according to the first oil injection amount corresponding to each cylinder and the first maximum oil injection amount of each cylinder, includes: and judging whether the first oil injection quantity corresponding to each cylinder is smaller than the first maximum oil injection quantity of the cylinder, if so, subtracting 1 from M, recalculating the second oil injection quantity corresponding to each cylinder in the M cylinders, taking the second oil injection quantity as a new first oil injection quantity, and repeating the step until the first oil injection quantity corresponding to the first cylinder is larger than the first maximum oil injection quantity of the first cylinder, subtracting 1 from the difference value between the initial value and the current value of M to obtain a value, and determining the value as the quantity of the cylinders needing to be stopped.

The method can determine the number of cylinders needing to be stopped according to the starting oil quantity actually required by the engine and the first oil injection quantity corresponding to each cylinder and the first maximum oil injection quantity of each cylinder when different numbers of engine cylinders are started, and correspondingly increases the oil injection quantity in each started cylinder by reducing the number of the cylinders started by the engine as much as possible under the condition of meeting the actual requirement of the engine, so that the ignition starting efficiency of the engine can be improved, and the discharge capacity of the engine can be reduced.

Optionally, determining the starting oil amount of the engine according to the starting temperature includes: acquiring a first rotating speed of an engine; and determining the starting oil quantity corresponding to the starting temperature and the first rotating speed according to the corresponding relation among the temperature, the rotating speed and the starting oil quantity which are stored in advance.

The method determines the corresponding relation among the starting temperature, the rotating speed and the starting oil quantity of the engine in advance, and stores the corresponding relation in the engine in advance, so that when the engine needs to determine the starting oil quantity according to the starting temperature, the starting oil quantity corresponding to the current starting temperature can be determined only by searching the corresponding relation, the operation process in the engine is simple, the operation efficiency is high, and the engine can determine the starting oil quantity corresponding to the starting temperature in time.

Optionally, after closing a corresponding number of cylinders from the M cylinders in sequence, the method further includes: respectively acquiring a current second rotating speed and a current torque of the engine; determining a third oil injection quantity corresponding to the second rotating speed and the current torque according to a corresponding relation among the rotating speed, the torque and the oil injection quantity which are stored in advance, wherein the third oil injection quantity is the oil injection quantity corresponding to each second cylinder in the M cylinders which is in the working state at present; and adjusting the number of cylinders needing to be stopped in real time according to the third fuel injection quantity.

By the method, when the engine runs in an idling state, the number of cylinders in which the engine runs can be adjusted, the fuel injection quantity in a single cylinder of the engine can be improved, the heating efficiency of the engine can be improved, the discharge capacity of the engine can be reduced, and the environmental pollution can be reduced.

Optionally, according to third fuel injection quantity, adjust the quantity that needs the deactivation of jar in real time, include: acquiring the current air intake flow of the engine; determining a second maximum fuel injection quantity of a second cylinder corresponding to the current intake air flow according to a pre-stored corresponding relation between the intake air flow and the fuel injection quantity; and adjusting the number of cylinders needing to be stopped in real time according to the third fuel injection quantity and the second maximum fuel injection quantity.

The method determines the corresponding relation between the air intake flow and the fuel injection quantity in advance, and stores the corresponding relation in the engine in advance, so that when the engine needs to determine the fuel injection quantity of the engine cylinder according to the air intake flow, the fuel injection quantity of the engine cylinder corresponding to the air intake flow of the current engine can be determined only by searching the corresponding relation, the operation process in the engine is simple, and the operation efficiency is high.

Optionally, the method further comprises: respectively acquiring the engine oil temperature and the rotation angle of the engine; determining a target rotation angle corresponding to the second rotation speed and the engine oil temperature according to a preset corresponding relation among the rotation speed, the engine oil temperature and the engine rotation angle; and if the turning angle is the same as the target turning angle, determining that the cylinder is successfully closed.

According to the method, whether the engine cylinder is successfully closed or not can be determined by acquiring the current engine oil temperature and the current rotation angle of the engine and comparing the relationship between the current rotation angle of the engine and the preset rotation angle, and the method is simple in operation and high in processing speed.

In a second aspect, the present application provides an engine cylinder control apparatus comprising:

and the receiving module is used for receiving the first starting instruction.

The obtaining module is used for obtaining the starting temperature of the engine based on the first starting instruction.

The determining module is used for determining the starting oil quantity of the engine and the first maximum oil injection quantity of each of the M cylinders according to the starting temperature.

The determining module is further used for determining the number of cylinders needing to be deactivated according to the starting oil quantity and the first maximum oil injection quantity of each cylinder.

And the control module is used for closing the cylinders with the corresponding number from the M cylinders in sequence when receiving a second starting instruction.

Optionally, the determining module is specifically configured to determine, according to the starting oil amount, a first oil injection amount corresponding to each of the M cylinders; and determining the number of cylinders needing to be deactivated according to the first oil injection quantity corresponding to each cylinder and the first maximum oil injection quantity of each cylinder.

Optionally, the determining module is specifically configured to determine whether the first oil injection amount corresponding to each cylinder is smaller than the first maximum oil injection amount of the cylinder, if so, subtract 1 from M, recalculate the second oil injection amount corresponding to each cylinder of the M cylinders, use the second oil injection amount as a new first oil injection amount, and repeat this step until the first oil injection amount corresponding to the first cylinder is larger than the first maximum oil injection amount of the first cylinder, and determine a value obtained by subtracting 1 from a difference between an initial value and a current value of M as the number of cylinders to be deactivated.

Optionally, the determining module is specifically configured to obtain a first rotation speed of the engine; and determining the starting oil quantity corresponding to the starting temperature and the first rotating speed according to the corresponding relation among the temperature, the rotating speed and the starting oil quantity which are stored in advance.

Optionally, the obtaining module is further configured to obtain a current second rotation speed and a current torque of the engine, respectively.

The determining module is further configured to determine a third oil injection quantity corresponding to the second rotation speed and the current torque according to a pre-stored correspondence relationship among the rotation speed, the torque, and the oil injection quantity, where the third oil injection quantity is an oil injection quantity corresponding to each second cylinder in the M cylinders, which is currently in the operating state.

The control module is further used for adjusting the number of cylinders needing to be stopped in real time according to the third fuel injection quantity.

Optionally, the control module is specifically configured to obtain a current intake air flow rate of the engine; determining a second maximum fuel injection quantity of a second cylinder corresponding to the current intake air flow according to a pre-stored corresponding relation between the intake air flow and the fuel injection quantity; and adjusting the number of cylinders needing to be stopped in real time according to the third fuel injection quantity and the second maximum fuel injection quantity.

Optionally, the obtaining module is further configured to obtain an oil temperature and a rotation angle of the engine respectively.

The determining module is further used for determining a target rotation angle corresponding to the second rotation speed and the engine oil temperature according to the corresponding relation among the preset rotation speed, the engine oil temperature and the engine rotation angle; and if the turning angle is the same as the target turning angle, determining that the cylinder is successfully closed.

In a third aspect, the present application provides an engine comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect or the alternatives of the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium having stored thereon computer-executable instructions for implementing the method as described in the first aspect or the alternatives thereof when executed by a processor.

The application provides a control method and device of engine cylinders and an engine, wherein after a first starting instruction is received, based on the first starting instruction, the starting temperature of the engine is firstly obtained, then according to the starting temperature, the starting oil quantity of the engine and the first maximum oil injection quantity of each cylinder in M cylinders are determined, and according to the starting oil quantity and the first maximum oil injection quantity of each cylinder, the quantity of cylinders needing to be stopped of the engine is determined; when the engine receives a second starting instruction, namely the engine is started, the engine closes the corresponding number of cylinders from the M cylinders in sequence, and control over the cylinders of the engine is achieved. Through the control method of the engine cylinder, on one hand, the engine can determine the matched starting oil quantity according to the starting temperature of the engine, so that the faults that the engine is not easy to catch fire and start due to too low starting oil quantity or too much engine rotating speed is caused by too high starting oil quantity are avoided; on the other hand, the engine can close a certain number of cylinders according to the actual requirements, so that pumping loss is reduced, friction loss torque is reduced, and the engine can be started to a higher rotating speed; meanwhile, the engine discharge capacity can be reduced, the fuel injection quantity in a single cylinder is improved, the engine is easy to ignite and start, and the rotating speed of the engine is ensured not to be increased.

Drawings

FIG. 1 is a schematic flow chart of a method of controlling an engine cylinder provided herein;

FIG. 2 is another schematic flow chart diagram of a method of controlling an engine cylinder provided herein;

FIG. 3 is a schematic diagram of a control device for an engine cylinder according to the present disclosure;

fig. 4 is a schematic structural diagram of an engine provided by the present application.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the prior art, the starting oil quantity of an engine is usually preset according to a calibration working condition, but the actual working condition and the calibration working condition of the engine usually have a certain difference, and the starting oil quantity does not necessarily meet the actual requirement of the engine. When the engine is started in a hot start mode or a cold start mode, the required starting oil amount also has a certain difference corresponding to different starting temperatures. When the amount of starting oil of the engine is less than its actual demand, it may cause the engine to be less likely to start on fire; when the starting oil quantity of the engine is larger than the actual required quantity, although the engine is easy to ignite and start, the engine speed is easy to overshoot, and the normal operation of the engine is also influenced. If can be according to engine start temperature, confirm the start oil volume rather than matching, then can satisfy the actual use demand of engine, solve this technical problem.

In addition, the number of cylinders of the engine operated by the engine in the prior art is generally fixed when the engine is operated, however, when the engine is started for a certain amount of oil, the more cylinders of the engine, the less the amount of oil injected into a single cylinder is, which may cause the engine not to be easily started on fire; even if the engine is started, after the engine enters an idle running stage, the combustion temperature of the engine is low due to the fact that the fuel injection quantity in a single cylinder is small, the temperature rising speed of the engine is slow, and normal starting of the engine is affected. The technical problem can be solved if the number of the opened cylinders of the engine is correspondingly controlled to be suitable for the use requirement of the engine in the starting and/or idling operation stage of the engine.

Based on the above, the application provides a control method of an engine cylinder, wherein the engine can obtain the actual starting temperature, and the starting oil quantity of the engine matched with the starting temperature of the engine is determined based on the starting temperature, so that the engine cannot normally work due to the fact that the starting oil quantity of the engine is too high or too low; meanwhile, the more the number of the cylinders is, the less the oil injection amount of the single cylinder is, and the lower the combustion temperature of the engine can be caused.

The embodiments of the present invention will be described in detail below with reference to specific examples.

Fig. 1 is a schematic flow chart of a control method for cylinders of an engine, which is provided by the present application and is applied to the engine, wherein the engine comprises M cylinders, and M is a positive integer greater than or equal to 2. As shown in fig. 1, the method includes:

s101, receiving a first starting instruction.

The first start instruction may be for input by a key, a button, or the like, or may be input by a user by voice. Specifically, the first start instruction may be an instruction for controlling initialization of the engine controller.

And S102, acquiring the starting temperature of the engine.

The starting temperature of the engine may be any one of an engine temperature, an intake air temperature, or an ambient temperature acquired before the engine is started. Specifically, the start temperature of the engine may be set to a minimum temperature value among the engine temperature, the intake air temperature, and the ambient temperature acquired before the engine is started.

Because the lower the starting temperature of the engine is, the larger the oil quantity required when the engine is started is, the minimum temperature value is determined as the starting temperature of the engine by the method, so that the maximum starting oil quantity of the engine can be ensured, and the normal starting of the engine can be ensured.

Accordingly, the engine may acquire the starting temperature of the engine by acquiring the engine temperature, the intake air temperature and the ambient temperature through corresponding temperature sensors, and determining the minimum value of the engine temperature, the intake air temperature and the ambient temperature as the starting temperature of the engine.

S103, determining the starting oil quantity of the engine and the first maximum oil injection quantity of each of the M cylinders according to the starting temperature.

In general, when the starting temperature is higher, the engine is easier to catch fire and start when being started; when the starting temperature is lower, the engine is not easy to ignite and start, so that when the starting temperature of the engine is different, the starting oil quantity required by the engine is different, and the first maximum oil injection quantity of each corresponding cylinder is different. When the oil quantity is less, the engine is not easy to ignite and start; when the amount of oil is large, the engine is likely to be ignited and started, but the engine speed tends to rise too much. Therefore, in determining the starting oil amount of the engine and the first maximum oil injection amount of each of the M cylinders, it is necessary to determine in combination with the starting oil amount of the engine.

And S104, determining the number of cylinders needing to be deactivated according to the starting oil quantity and the first maximum oil injection quantity of each cylinder.

The engine is closed by the individual cylinders under the premise of ensuring the normal work of the engine. Therefore, when the number of cylinders needing to be shut down of the engine is determined, the starting oil quantity and the first maximum oil injection quantity of each cylinder need to be combined, the engine cylinders are guaranteed to share a sufficient starting oil quantity, and the oil quantity shared by each cylinder is not larger than the corresponding first maximum oil injection quantity.

And S105, when a second starting instruction is received, closing the corresponding number of cylinders from the M cylinders.

Specifically, one possible implementation of shutting off a corresponding number of cylinders from M cylinders is: the corresponding number of cylinders is shut off in sequence from the M cylinders. For example, assuming that the engine is a 6-cylinder engine and the number of cylinders requiring deactivation is 2, the 1 st and 2 nd cylinders are sequentially closed, or the 3 rd and 4 th cylinders are sequentially closed.

Another possible implementation of shutting off a corresponding number of cylinders from M cylinders is: the corresponding cylinder is shut off from the M cylinders based on engine balance, noise, vibration, thermal balance, and the number of cylinders requiring deactivation. At this time, the cylinders of the engine that are shut off may be continuous or discontinuous. For example, assuming that the engine is a 6-cylinder engine and the number of cylinders requiring cylinder deactivation is 2, after analyzing engine information such as balance, noise, vibration, and thermal balance of the engine, the cylinders requiring cylinder deactivation are determined to be the 1 st cylinder and the 6 th cylinder, and the 1 st cylinder and the 6 th cylinder are deactivated.

The second start instruction may be for input by a key, or the like; and may be user input by voice. Specifically, the second start instruction may be an instruction for controlling the start of the engine.

According to the control method of the engine cylinders, after a first starting instruction is received, the starting temperature of the engine is firstly obtained, then the starting oil quantity of the engine and the first maximum oil injection quantity of each cylinder in M cylinders are determined according to the starting temperature, and the quantity of the cylinders needing to be stopped of the engine is determined according to the starting oil quantity and the first maximum oil injection quantity of each cylinder; when the engine receives a second starting instruction, namely the engine is started, the engine closes the corresponding number of cylinders from the M cylinders in sequence, and control over the cylinders of the engine is achieved. Through the control method of the engine cylinder, on one hand, the engine can determine the matched starting oil quantity according to the starting temperature of the engine, so that the faults that the engine is not easy to catch fire and start due to too low starting oil quantity or too much engine rotating speed is caused by too high starting oil quantity are avoided; on the other hand, the engine can close a certain number of cylinders according to the actual requirements, so that pumping loss is reduced, friction loss torque is reduced, and the engine can be started to a higher rotating speed; meanwhile, the engine discharge capacity can be reduced, the fuel injection quantity in a single cylinder is improved, the engine is easy to ignite and start, and the rotating speed of the engine is ensured not to be increased.

The following describes an embodiment, in which S104 in the above embodiment determines the number of cylinders that need to be deactivated according to the starting oil amount and the first maximum oil injection amount of each cylinder. FIG. 2 is another schematic flow chart of a method of controlling cylinders of an engine provided herein, as shown in FIG. 2, comprising:

s201, receiving a first starting instruction.

S202, obtaining the starting temperature of the engine.

The implementation processes of S201 to S202 are similar to those of S101 to S102, and specific descriptions may refer to S101 to S102, which are not described herein again.

S203, determining the starting oil quantity of the engine and the first maximum oil injection quantity of each of the M cylinders according to the starting temperature.

Specifically, one possible implementation manner of determining the starting oil amount of the engine according to the starting temperature is as follows: acquiring a first rotating speed of an engine; and determining the starting oil quantity corresponding to the starting temperature and the first rotating speed according to the corresponding relation among the starting temperature, the rotating speed and the starting oil quantity which are stored in advance.

For example, when M is 6, i.e., the engine is a 6-cylinder engine. Table 1 shows a corresponding relationship among the starting temperature, the rotational speed, and the starting oil amount provided by the present application, and as shown in table 1, when the starting temperature is 20 ℃ and the rotational speed is less than or equal to 600rpm, the starting oil amount required for starting the engine is 10 g; when the starting temperature is 5 ℃ and the rotating speed is less than or equal to 600rpm, the starting oil quantity required by the starting of the engine is 20 g; when the starting temperature is 20 ℃, the rotating speed is more than 600rpm and less than or equal to 1500rpm, the starting oil amount required by the starting of the engine is 15 g; when the starting temperature is 5 ℃, the rotating speed is more than 600rpm and less than or equal to 1500rpm, the starting oil amount required by the starting of the engine is 25 g; when the starting temperature is 20 ℃ and the rotating speed is more than 1500rpm, the starting oil amount required by the starting of the engine is 20 g; when the starting temperature is 5 ℃ and the rotating speed is more than 1500rpm, the starting oil amount required by the starting of the engine is 30 g.

TABLE 1 starting temperature, speed and starting oil quantity corresponding relation

Starting temperature	Rotational speed	Starting oil quantity
			20℃	n≤600rpm	36g
20℃	600rpm＜n≤1500rpm	48g
			20℃	n＞1500rpm	60g
5℃	n≤600rpm	48g
			5℃	600rpm＜n≤1500rpm	60g
5℃	n＞1500rpm	72g

Specifically, according to the starting temperature, one possible implementation manner of determining the first maximum fuel injection amount of each of the M cylinders is as follows: and determining the first maximum oil injection quantity of each cylinder in the M cylinders according to the corresponding relation between the starting temperature and the prestored starting temperature and the maximum oil injection quantity of the single cylinder.

Continuing with the example of the engine being a 6-cylinder engine, table 2 provides a corresponding relationship between the starting temperature and the maximum fuel injection amount per cylinder provided herein, as shown in table 2, when the starting temperature of the engine is 20 ℃, the maximum fuel injection amount per cylinder of the engine is 10g, and thus it can be determined that when the starting temperature of the engine is 20 ℃, the first maximum fuel injection amount per cylinder of the 6 cylinders is 10 g.

TABLE 2 correlation between the starting temperature and the maximum fuel injection per cylinder

Starting temperature	Maximum fuel injection for single cylinder
		20℃	10g
5℃	12g

S204, determining a first oil injection quantity corresponding to each of the M cylinders according to the starting oil quantity; and determining the number of cylinders needing to be deactivated according to the first oil injection quantity corresponding to each cylinder and the first maximum oil injection quantity of each cylinder.

Specifically, a possible implementation manner of determining the number of cylinders to be deactivated according to the first oil injection amount corresponding to each cylinder in the M cylinders and the first maximum oil injection amount corresponding to each cylinder is as follows: and determining the number of cylinders to be stopped according to the starting oil quantity, the first maximum oil injection quantity of each cylinder and a preset oil quantity conversion table, wherein the oil quantity conversion table comprises the corresponding relation among the starting number of the cylinders, the starting temperature, the starting oil quantity and the single-cylinder oil injection quantity.

Continuing to take the example that the engine is a 6-cylinder engine, table 3 is a corresponding relationship between the number of opened cylinders, the starting temperature, the starting oil amount, and the single-cylinder oil injection amount provided by the present application, as shown in table 3, when the starting oil amount is 30g, if 1 engine cylinder is opened, the first oil injection amount corresponding to the engine cylinder is 36 g; if 2 engine cylinders are started, the first fuel injection quantity corresponding to each started engine cylinder is 18 g; if 3 engine cylinders are started, the first fuel injection quantity corresponding to each started engine cylinder is 12 g; if 4 engine cylinders are started, the first fuel injection quantity corresponding to each started engine cylinder is 9 g; if 5 engine cylinders are opened, the first injected fuel amount for each opened engine cylinder is 7.2 g.

The illustration continues with table 2. When the starting temperature of the engine is 20 ℃, the maximum fuel injection quantity corresponding to a single cylinder of the engine is 10 g. Therefore, if 1 engine cylinder is opened, or two engine cylinders are opened, or 3 engine cylinders are opened, the first fuel injection quantity corresponding to the engine cylinders is larger than the first maximum fuel injection quantity corresponding to the engine cylinders, and the engine cannot work normally; when opening 4 engine cylinders or opening 5 engine cylinders, the first fuel injection quantity that engine cylinder corresponds is less than its corresponding first maximum fuel injection quantity, and when opening 4 engine cylinders, the first fuel injection quantity that every engine cylinder that is opened corresponds is greater than and opens 5 engine cylinders and is the first fuel injection quantity that every engine cylinder that is opened corresponds, can guarantee that the oil mass that the single cylinder corresponds is higher, and the engine is the start of catching fire more easily, therefore confirm to open 4 engine cylinders, then corresponding, close 2 jars.

TABLE 3 corresponding relationship between the number of cylinder openings, starting temperature, starting oil mass and single-cylinder fuel injection mass

Number of cylinders started	Starting oil quantity	Starting temperature	Single cylinder fuel injection quantity
				1	36g	20℃	36g
2	36g	20℃	18g
				3	36g	20℃	12g
4	36g	20℃	9g
				5	36g	20℃	7.2g

The method determines the corresponding relation among the starting temperature of the engine, the starting oil quantity, the opening number of the cylinders and the single-cylinder oil injection quantity in advance, and stores the corresponding relation in the engine in advance, so that when the engine needs to determine the first oil injection quantity corresponding to each cylinder according to the starting oil quantity, the first oil injection quantity corresponding to each current cylinder can be determined only by searching the corresponding relation, the operation process in the engine is simple, and the operation efficiency is high.

Further, besides the table look-up mode, a first fuel injection quantity corresponding to each cylinder in the M cylinders is determined according to the starting fuel quantity; another possible implementation manner for determining the number of cylinders to be deactivated according to the first fuel injection quantity corresponding to each cylinder and the first maximum fuel injection quantity of each cylinder is as follows: and judging whether the first oil injection quantity corresponding to each cylinder is smaller than the first maximum oil injection quantity of the cylinder, if so, subtracting 1 from M, recalculating the second oil injection quantity corresponding to each cylinder in the M cylinders, taking the second oil injection quantity as a new first oil injection quantity, and repeating the step until the first oil injection quantity corresponding to the first cylinder is larger than the first maximum oil injection quantity of the first cylinder, and determining the difference value between the initial value of M and the value before the current value as the quantity of the cylinders needing to be deactivated.

For example, the starting oil amount of a 6-cylinder engine is 36g, the first maximum oil injection amount corresponding to each cylinder is 10g, when 6 cylinders are all started, the first oil injection amount corresponding to each cylinder is 6g on average, the first maximum oil injection amount corresponding to each cylinder is 10g smaller than the first maximum oil injection amount corresponding to the cylinder, when 5 cylinders are started, the first oil injection amount corresponding to each cylinder is 7.2g on average, and the first maximum oil injection amount corresponding to each cylinder is 10g smaller than the first maximum oil injection amount corresponding to the cylinder; when 4 cylinders are started, the average first oil injection quantity corresponding to each cylinder is 9g, and the first maximum oil injection quantity smaller than the first maximum oil injection quantity corresponding to the cylinders is 10 g; when 3 cylinders are started, the average first oil injection amount corresponding to each cylinder is 12g, the first maximum oil injection amount larger than the first maximum oil injection amount corresponding to the cylinder is 10g, 2 is obtained by subtracting 3 from 6 and subtracting 1, namely the number of cylinders needing to be stopped is 2, and the number of started cylinders is 4.

Further, the same technical effect can be achieved by adjusting the calculation process in the implementation manner. Specifically, according to the starting oil quantity, a first oil injection quantity corresponding to each of M cylinders is determined; another possible implementation manner for determining the number of cylinders to be deactivated according to the first fuel injection quantity corresponding to each cylinder and the first maximum fuel injection quantity of each cylinder is as follows: and judging whether the first oil injection quantity corresponding to 1 cylinder is larger than the first maximum oil injection quantity of the cylinder or not, if so, adding 1 to the number of cylinders, recalculating the number of cylinders plus the second oil injection quantity corresponding to each cylinder in 1 cylinder, taking the second oil injection quantity as a new first oil injection quantity, and repeating the step until the first oil injection quantity corresponding to the first cylinder is smaller than the first maximum oil injection quantity of the first cylinder, and determining the difference value between the initial value and the current value of the M as the quantity of the cylinders needing to be stopped.

For example, the starting oil amount of a 6-cylinder engine is 36g, the first maximum oil injection amount corresponding to each cylinder is 10g, when 1 cylinder is started, the first oil injection amount corresponding to the cylinder is 36g and is 10g larger than the first maximum oil injection amount corresponding to the cylinder, when 2 cylinders are started, the first oil injection amount corresponding to each cylinder is 18g on average, and the first maximum oil injection amount corresponding to the cylinder is 10 g; when 3 cylinders are started, the average first oil injection quantity corresponding to each cylinder is 12g, and the first maximum oil injection quantity larger than the first maximum oil injection quantity corresponding to the cylinders is 10 g; when 4 cylinders are started, the average first oil injection amount corresponding to each cylinder is 9g, the first maximum oil injection amount smaller than the first maximum oil injection amount corresponding to the cylinder is 10g, 2 is obtained by subtracting 4 from 6, namely the number of cylinders needing to be deactivated is 2, namely the number of started cylinders is 4.

And S205, when a second starting instruction is received, closing the corresponding number of cylinders from the M cylinders in sequence.

S205 is similar to S105, and the detailed description can refer to S105, which is not repeated herein.

After the engine starts and finishes, when the engine operation is in idle state, engine cylinder internal load is less, and the engine can't work in the high efficiency region, leads to the engine oil consumption too high, the engine intensifies slowly and engine displacement is great, and not only the energy consumption is too high and great to environmental pollution, for solving this problem, optional, after closing corresponding quantity's cylinder in M cylinders in proper order, the control method of the engine cylinder that this application provided still includes:

s206, respectively acquiring a current second rotating speed and a current torque of the engine; determining a third oil injection quantity corresponding to the second rotating speed and the current torque according to a corresponding relation among the rotating speed, the torque and the oil injection quantity which are stored in advance, wherein the third oil injection quantity is the oil injection quantity corresponding to each second cylinder in the M cylinders which is in the working state at present; and adjusting the number of cylinders needing to be stopped in real time according to the third fuel injection quantity.

Specifically, according to the third fuel injection quantity, one possible implementation manner of adjusting the quantity of the cylinders needing to be deactivated in real time is as follows: acquiring the current air intake flow of the engine; determining a second maximum fuel injection quantity of a second cylinder corresponding to the current intake air flow according to a pre-stored corresponding relation between the intake air flow and the fuel injection quantity; and adjusting the number of cylinders needing to be stopped in real time according to the third fuel injection quantity and the second maximum fuel injection quantity.

To further determine whether cylinder deactivation of the engine was successful, optionally, the method further comprises:

s207, respectively obtaining the engine oil temperature and the rotation angle of the engine; determining a target rotation angle corresponding to the second rotation speed and the engine oil temperature according to a preset corresponding relation among the rotation speed, the engine oil temperature and the engine rotation angle; and if the turning angle is the same as the target turning angle, determining that the cylinder is successfully closed.

On the basis of the above embodiment, the control method for the engine cylinder further determines the actually required starting oil amount of the engine and the first maximum oil injection amount of each cylinder in the M cylinders according to the actual starting temperature of the engine, and determines the first oil injection amount corresponding to each cylinder in the M cylinders according to the starting oil amount of the engine; further, according to the first maximum oil injection quantity of the first oil injection quantity corresponding to each determined cylinder and the first maximum oil injection quantity of each determined cylinder, the number of cylinders which need to be stopped in the actual process of the engine is determined, the actual starting temperature of the engine is combined, the starting oil quantity and the first maximum oil injection quantity of each cylinder and the first oil injection quantity are combined, on one hand, the engine is guaranteed to have enough starting oil quantity, on the other hand, the oil injection quantity of each started cylinder of the engine can be guaranteed to be not larger than the maximum oil injection quantity of the cylinder, the normal work of the engine can be guaranteed, and the normal work of the engine can be guaranteed.

Fig. 3 is a schematic structural diagram of a control device for an engine cylinder provided by the present application, and as shown in fig. 3, the device includes:

the receiving module 31 is configured to receive a first start instruction.

An obtaining module 32 obtains a starting temperature of the engine based on the first start command.

The determination module 33 is configured to determine a starting oil amount of the engine and a first maximum oil injection amount of each of the M cylinders according to the starting temperature.

The determining module 33 is further configured to determine the number of cylinders that need to be deactivated according to the starting oil amount and the first maximum oil injection amount of each cylinder.

And the control module 34 is configured to sequentially close a corresponding number of cylinders from the M cylinders when receiving a second start instruction.

Optionally, the determining module 33 is specifically configured to determine, according to the starting oil amount, a first oil injection amount corresponding to each of the M cylinders; and determining the number of cylinders needing to be deactivated according to the first oil injection quantity corresponding to each cylinder and the first maximum oil injection quantity of each cylinder.

Optionally, the determining module 33 is specifically configured to determine whether the first oil injection amount corresponding to each cylinder is smaller than the first maximum oil injection amount of the cylinder, if so, subtract 1 from M, recalculate the second oil injection amount corresponding to each cylinder of the M cylinders, use the second oil injection amount as a new first oil injection amount, and repeat this step until the first oil injection amount corresponding to the first cylinder is larger than the first maximum oil injection amount of the first cylinder, and determine a value obtained by subtracting 1 from a difference between an initial value of M and a current value, as the number of cylinders needing to be deactivated.

Optionally, the determining module 33 is specifically configured to obtain a first rotation speed of the engine; and determining the starting oil quantity corresponding to the starting temperature and the first rotating speed according to the corresponding relation among the temperature, the rotating speed and the starting oil quantity which are stored in advance.

Optionally, the obtaining module 32 is further configured to obtain a current second speed and a current torque of the engine, respectively.

The determining module 33 is further configured to determine a third fuel injection quantity corresponding to the second rotation speed and the current torque according to a pre-stored correspondence relationship between the rotation speed, the torque, and the fuel injection quantity, where the third fuel injection quantity is a fuel injection quantity corresponding to each second cylinder in the M cylinders, which is currently in the operating state.

The control module 34 is further configured to adjust the number of cylinders that need to be deactivated in real time according to the third injection amount.

Optionally, the control module 34 is specifically configured to obtain a current intake air flow rate of the engine; determining a second maximum fuel injection quantity of a second cylinder corresponding to the current intake air flow according to a pre-stored corresponding relation between the intake air flow and the fuel injection quantity; and adjusting the number of cylinders needing to be stopped in real time according to the third fuel injection quantity and the second maximum fuel injection quantity.

Optionally, the obtaining module 34 is further configured to obtain an oil temperature and a rotation angle of the engine, respectively.

The determining module 33 is further configured to determine a target rotation angle corresponding to the second rotation speed and the engine oil temperature according to a preset correspondence relationship among the rotation speed, the engine oil temperature, and the engine rotation angle; and if the turning angle is the same as the target turning angle, determining that the cylinder is successfully closed.

The control device for the engine cylinder can execute the control method for the engine cylinder, and the content and the effect of the control device for the engine cylinder can refer to the embodiment part of the method, and are not described again.

Fig. 4 is a schematic structural diagram of an engine provided by the present application, and as shown in fig. 4, the engine of the present embodiment includes: a processor 41, a memory 42; processor 41 is communicatively coupled to memory 42. The memory 42 is used for storing computer programs. The processor 41 is adapted to call a computer program stored in the memory 42 to implement the method in the above-described method embodiment.

Optionally, the engine further comprises: a transceiver 43 for enabling communication with other devices.

The engine can execute the control method of the engine cylinder, and the content and the effect of the control method can be referred to the embodiment part of the method, and are not described again.

The application also provides a computer readable storage medium, and computer executable instructions are stored in the computer readable storage medium and are executed by a processor to realize the control method of the engine cylinder.

The content and effect of the control method for the engine cylinder can be referred to the embodiment of the method, and details are not repeated here.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims. It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The control method of the engine cylinder is characterized by being applied to an engine, wherein the engine comprises M cylinders, and M is a positive integer greater than or equal to 2; the method comprises the following steps:

receiving a first starting instruction;

acquiring the starting temperature of the engine;

determining a starting oil quantity of the engine and a first maximum oil injection quantity of each of the M cylinders according to the starting temperature;

determining the number of cylinders needing to be deactivated according to the starting oil quantity and the first maximum oil injection quantity of each cylinder;

and when a second starting instruction is received, closing the corresponding number of cylinders from the M cylinders in sequence.

2. The method of claim 1, wherein determining the number of cylinders requiring deactivation based on the start-up oil volume and the first maximum injection volume per cylinder comprises:

determining a first oil injection quantity corresponding to each of the M cylinders according to the starting oil quantity;

and determining the number of cylinders to be deactivated according to the first oil injection amount corresponding to each cylinder and the first maximum oil injection amount of each cylinder.

3. The method of claim 2, wherein determining the number of cylinders requiring deactivation based on the first injection quantity for each cylinder and the first maximum injection quantity for each cylinder comprises:

and judging whether the first oil injection quantity corresponding to each cylinder is smaller than the first maximum oil injection quantity of the cylinder, if so, subtracting 1 from M, recalculating the second oil injection quantity corresponding to each cylinder in the M cylinders, taking the second oil injection quantity as a new first oil injection quantity, and repeating the step until the first oil injection quantity corresponding to the first cylinder is larger than the first maximum oil injection quantity of the first cylinder, subtracting 1 from the difference value between the initial value and the current value of M to obtain a value, and determining the value as the number of cylinders needing to be deactivated.

4. The method of any of claims 1-3, wherein determining a starting oil volume of the engine based on the starting temperature comprises:

acquiring a first rotating speed of the engine;

and determining the starting oil quantity corresponding to the starting temperature and the first rotating speed according to the corresponding relation among the temperature, the rotating speed and the starting oil quantity which are stored in advance.

5. The method of any of claims 1-3, wherein after sequentially shutting off a corresponding number of cylinders from the M cylinders, the method further comprises:

respectively acquiring a current second rotating speed and a current torque of the engine;

determining a third fuel injection quantity corresponding to the second rotating speed and the current torque according to a prestored corresponding relation among the rotating speed, the torque and the fuel injection quantity, wherein the third fuel injection quantity is the fuel injection quantity corresponding to each second cylinder in the M cylinders which is currently in the working state;

and adjusting the number of the cylinders needing to be stopped in real time according to the third fuel injection quantity.

6. The method of claim 5, wherein adjusting the number of cylinders requiring deactivation in real time based on the third injection quantity comprises:

acquiring a current intake air flow rate of the engine;

determining a second maximum fuel injection quantity of the second cylinder corresponding to the current intake air flow according to a pre-stored corresponding relation between the intake air flow and the fuel injection quantity;

and adjusting the number of the cylinders needing to be deactivated in real time according to the third fuel injection quantity and the second maximum fuel injection quantity.

7. The method of claim 6, further comprising:

respectively acquiring the engine oil temperature and the rotation angle of the engine;

determining a target rotation angle corresponding to the second rotation speed and the engine oil temperature according to a preset corresponding relation among the rotation speed, the engine oil temperature and the engine rotation angle;

and if the turning angle is the same as the target turning angle, determining that the cylinder is successfully closed.

8. A control apparatus for an engine cylinder, characterized by comprising:

the receiving module is used for receiving a first starting instruction;

the acquisition module is used for acquiring the starting temperature of the engine;

the determining module is used for determining the starting oil quantity of the engine and the first maximum oil injection quantity of each of the M cylinders according to the starting temperature;

the determining module is further configured to determine the number of cylinders to be deactivated according to the starting oil amount and the first maximum oil injection amount of each cylinder;

9. An engine, comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 7.

10. A computer-readable storage medium having computer-executable instructions stored therein, which when executed by a processor, are configured to implement the method of any one of claims 1 to 7.