阅读说明：本技术 一种单缸机台架高压燃油供给系统、方法、介质及设备 (High-pressure fuel supply system, method, medium and equipment for single-cylinder engine rack ) 是由 姚聪 潘理杰 蔡文新 张建东 于 2021-07-29 设计创作，主要内容包括：本发明提供一种单缸机台架高压燃油供给系统、方法、介质及设备,系统包括：单缸机；转速信号转换器用于获取所述单缸机的第一转速信号,并将第一转速信号转换为第二转速信号；电机用于根据第二转速信号同步驱动高压燃油泵运转；发动机高压燃油泵用于为单缸机提供目标燃油压力的燃油目标燃油压力与所述第一转速信号具有对应关系；如此,通过转速信号转换器将单缸机曲轴转速信号与电机转速信号进行同步,进而使得发动机凸轮轴同步驱动高压燃油泵运转,由于燃油压力和第一转速信号是具有一定对应关系的,因此相当于是根据第一转速信号同步调节燃油压力,从而可以为单缸机提供连续稳定燃油压力的燃油,确保可正常进行瞬态工况试验。(The invention provides a high-pressure fuel supply system, a method, a medium and equipment for a single-cylinder engine rack, wherein the system comprises: a single cylinder engine; the rotating speed signal converter is used for acquiring a first rotating speed signal of the single cylinder engine and converting the first rotating speed signal into a second rotating speed signal; the motor is used for synchronously driving the high-pressure fuel pump to operate according to the second rotating speed signal; the engine high-pressure fuel pump is used for providing a fuel target fuel pressure of the target fuel pressure for the single cylinder engine, and the first rotating speed signal has a corresponding relation; so, carry out the synchronization with single cylinder engine crankshaft speed signal and motor speed signal through rotational speed signal converter, and then make engine camshaft synchronous drive high pressure fuel pump operation, because fuel pressure and first rotational speed signal have certain corresponding relation, consequently be equivalent to according to first rotational speed signal synchronization regulation fuel pressure, thereby can provide the fuel of continuous stable fuel pressure for the single cylinder engine, guarantee can normally carry out transient state operating mode test.)

1. A single cylinder skid high pressure fuel supply system, comprising:

a single cylinder engine;

the rotating speed signal converter is used for acquiring a first rotating speed signal of the single cylinder engine and converting the first rotating speed signal into a second rotating speed signal;

the motor is used for receiving the second rotating speed signal and synchronously driving the high-pressure fuel pump of the engine to operate according to the second rotating speed signal;

the engine high-pressure fuel pump is used for providing fuel with target fuel pressure for the single cylinder engine; the target fuel pressure has a corresponding relationship with the first rotation speed signal.

2. The system of claim 1, wherein the system further comprises:

the coupling is arranged between the motor and the engine camshaft;

and the engine camshaft is connected with the engine high-pressure fuel pump.

3. The system of claim 1, wherein the system further comprises:

one end of the oil rail is connected with an output port of the high-pressure fuel pump of the engine;

and one end of the oil injector is connected with the other end of the oil rail, and the other end of the oil injector is connected with the combustion chamber of the single cylinder engine.

4. The system of claim 1, wherein the system further comprises:

the oil depot is used for providing fuel oil for the engine fuel pump;

and the oil consumption instrument is arranged on an oil supply pipeline between the oil depot and the high-pressure fuel pump of the engine and is used for measuring oil consumption.

5. The system of claim 1, wherein the rotational speed signal converter is specifically configured to:

obtaining the ratio of the rotating speed of a crankshaft of the single cylinder engine to the rotating speed of a camshaft of the engine;

converting the first rotational speed signal to the second rotational speed signal based on the ratio.

6. A method for supplying fuel to a single cylinder engine stand, the method being applied to the system of any one of claims 1 to 5, the method comprising:

acquiring a first rotating speed signal of the single cylinder engine, and converting the first rotating speed signal into a second rotating speed signal;

synchronously driving an engine high-pressure fuel pump to operate according to the second rotating speed signal, and providing fuel oil with target fuel oil pressure for the single cylinder engine; wherein the content of the first and second substances,

the target fuel pressure has a corresponding relationship with the first rotation speed signal.

7. The method of claim 6, wherein said converting said first speed signal to a second speed signal comprises:

obtaining the ratio of the rotating speed of a crankshaft of the single cylinder engine to the rotating speed of a camshaft of the engine;

converting the first rotational speed signal to the second rotational speed signal based on the ratio.

8. The method of claim 6, wherein after synchronously driving operation of the high pressure fuel pump in response to the second rotational speed signal, the method further comprises:

utilizing an oil depot to provide fuel for the high-pressure fuel pump of the engine;

and measuring the oil consumption by using an oil consumption meter.

9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method of any one of claims 6 to 8.

10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 6 to 8 when executing the program.

Technical Field

The invention relates to the technical field of internal combustion engine testing, in particular to a high-pressure fuel supply system, a high-pressure fuel supply method, a high-pressure fuel supply medium and high-pressure fuel supply equipment for a single-cylinder engine rack.

Background

The design and research of internal combustion engines in China can carry out early budget estimation and estimation on the effect of a scheme by widely utilizing modern design theories and methods, and the period of the research and design of the internal combustion engines is greatly shortened. However, since the internal combustion engine is a mechanical product with high technical content and is extremely complex, the pure theoretical analysis is very difficult. In particular, the combustion problem is approximately estimated by an assumed mathematical physical model by means of an electronic computer, but the error is large, and therefore, the development of the internal combustion engine is basically performed by an optimization test of an actual internal combustion engine.

The single-cylinder testing machine has many advantages in optimizing the test compared with the multi-cylinder machine, so that the structural parameter optimization test of the actual internal combustion engine and the test of some new models are generally carried out by a single-cylinder machine rack. However, because the single-cylinder engine cylinder cover is compact in structure, an accessory structure such as a high-pressure fuel pump part on the multi-cylinder engine is not arranged in redundant space, and therefore external equipment is needed to provide high-pressure fuel conditions for the single-cylinder engine and simulate oil inlet conditions of the multi-cylinder engine.

In the prior art, an external motor generally provides a power source, the motor drives an oil pump to generate high-pressure fuel oil, and a motor controller adjusts the rotating speed of the motor to adjust the pressure of the fuel oil, so that the fuel oil is provided for a single cylinder engine. The existing oil supply mode of the single-cylinder engine rack can not provide continuous and stable fuel pressure for the single-cylinder engine rack, so that transient working condition tests can not be carried out.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides a high-pressure fuel supply system, a method, a medium and equipment for a single-cylinder engine stand, which are used for solving the technical problem that transient working condition tests cannot be carried out due to the fact that continuous and stable fuel pressure cannot be provided for the single-cylinder engine stand in the prior art.

In a first aspect of the invention, there is provided a single cylinder skid high pressure fuel supply system, the system comprising:

a single cylinder engine;

the rotating speed signal converter is used for acquiring a first rotating speed signal of the single cylinder engine and converting the first rotating speed signal into a second rotating speed signal;

the motor is used for receiving the second rotating speed signal and synchronously driving the high-pressure fuel pump of the engine to operate according to the second rotating speed signal;

the engine high-pressure fuel pump is used for providing fuel with target fuel pressure for the single cylinder engine; the target fuel pressure has a corresponding relationship with the first rotation speed signal.

In the above solution, the system further includes:

the coupling is arranged between the motor and the engine camshaft;

and the engine camshaft is connected with the engine high-pressure fuel pump.

In the above solution, the system further includes:

one end of the oil rail is connected with an output port of the high-pressure fuel pump of the engine;

and one end of the oil injector is connected with the other end of the oil rail, and the other end of the oil injector is connected with the combustion chamber of the single cylinder engine.

In the above solution, the system further includes:

the oil depot is used for providing fuel oil for the engine fuel pump;

and the oil consumption instrument is arranged on an oil supply pipeline between the oil depot and the high-pressure fuel pump of the engine and is used for measuring oil consumption.

In the foregoing solution, the rotation speed signal converter is specifically configured to:

obtaining the ratio of the rotating speed of a crankshaft of the single cylinder engine to the rotating speed of a camshaft of the engine;

converting the first rotational speed signal to the second rotational speed signal based on the ratio.

In a second aspect of the invention, there is provided a single cylinder gantry fuel delivery method for use in a system as claimed in any one of the first aspect of the invention, the method comprising:

acquiring a first rotating speed signal of the single cylinder engine, and converting the first rotating speed signal into a second rotating speed signal; synchronously driving an engine high-pressure fuel pump to operate according to the second rotating speed signal, and providing fuel oil with target fuel oil pressure for the single cylinder engine; wherein the content of the first and second substances,

the target fuel pressure has a corresponding relationship with the first rotation speed signal.

In the foregoing solution, the converting the first rotation speed signal into a second rotation speed signal includes:

obtaining the ratio of the rotating speed of a crankshaft of the single cylinder engine to the rotating speed of a camshaft of the engine;

converting the first rotational speed signal to the second rotational speed signal based on the ratio.

In the foregoing solution, after the high-pressure fuel pump is synchronously driven to operate according to the second rotation speed signal, the method further includes:

utilizing an oil depot to provide fuel for the high-pressure fuel pump of the engine;

and measuring the oil consumption by using an oil consumption meter.

In a third aspect of the invention, a computer-readable storage medium is provided, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method of any one of the second aspects.

In a fourth aspect of the invention, a computer device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any one of the second aspects when executing the program.

The invention provides a high-pressure fuel supply system, a method, a medium and equipment for a single-cylinder engine rack, wherein the system comprises: a single cylinder engine; the rotating speed signal converter is used for acquiring a first rotating speed signal of the single cylinder engine and converting the first rotating speed signal into a second rotating speed signal; the motor is used for receiving the second rotating speed signal and synchronously driving the high-pressure fuel pump to operate according to the second rotating speed signal; the engine high-pressure fuel pump is used for providing fuel with target fuel pressure for the single cylinder engine; the target fuel pressure and the first rotating speed signal have a corresponding relation; so, through speed signal converter with single cylinder engine bent axle speed signal and motor speed signal synchronization, be equivalent to with single cylinder engine bent axle speed signal and engine camshaft speed synchronous, and then make the operation of engine camshaft synchronous drive high pressure fuel pump, because fuel pressure and first speed signal have certain corresponding relation, consequently be equivalent to according to first speed signal synchronous regulation fuel pressure, thereby can provide the fuel of continuous stable fuel pressure for the single cylinder engine, guarantee to normally carry out transient state operating mode test.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a high-pressure fuel supply system for a single-cylinder engine stand according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a method for supplying high-pressure fuel to a single-cylinder engine stand according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a computer device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a computer-readable storage medium according to an embodiment of the present invention.

Detailed Description

In order to solve the technical problem that transient working condition tests cannot be performed due to the fact that continuous and stable fuel pressure cannot be provided for a single-cylinder engine stand in the prior art, the embodiment of the invention provides a high-pressure fuel supply system, a method, a medium and equipment for the single-cylinder engine stand.

In order to better understand the technical solutions, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations of the technical solutions of the present specification, and the technical features of the embodiments and embodiments of the present specification may be combined with each other without conflict.

The single cylinder machine has the advantages of flexible design, simple manufacture, less parts needing to be replaced in the test than the multi-cylinder machine, easy multiple scheme selection test, strong relative comparison, convenient adjustment, quick test process, short period, low cost and the like; and the single cylinder engine has no influence of uneven cylinder and mutual interference of intake and exhaust of each cylinder in the multi-cylinder test, so that the test accuracy can be ensured, and the influence after the change of a certain parameter can be conveniently judged, therefore, the embodiment provides a high-pressure fuel supply system for the single cylinder engine bench test when the single cylinder engine is used for carrying out the optimization test on the structural parameters of the internal combustion engine, as shown in fig. 1, the system comprises: the system comprises a single cylinder 1, a rotating speed signal converter 2, a motor 3 and an engine high-pressure fuel pump 4; wherein the content of the first and second substances,

the rotating speed signal converter 2 is used for acquiring a first rotating speed signal of the single cylinder 1 and converting the first rotating speed signal into a second rotating speed signal;

the motor 3 is used for receiving the second rotating speed signal and synchronously driving the high-pressure fuel pump 4 of the engine to operate according to the second rotating speed signal;

the engine high-pressure fuel pump 4 is used for providing fuel with target fuel pressure for the single cylinder engine 1; the target fuel pressure has a corresponding relationship with the first rotation speed signal.

The high-pressure fuel pump 4 of the engine is a high-pressure fuel pump in the existing multi-cylinder engine test bed, the high-pressure fuel pump does not need to be purchased additionally, and the cost of a high-pressure fuel supply system of a single-cylinder engine bed is reduced.

Specifically, one end of the rotating speed signal converter 2 is electrically connected with the crankshaft 5 of the single cylinder engine 1 through a signal wire, and the other end of the rotating speed signal converter 2 is electrically connected with the motor 3 through a signal wire; the rotating speed signal converter 2 is used for collecting the rotating speed of the crankshaft, and the rotating speed of the crankshaft is also a first rotating speed signal; and then converting the first rotating speed signal into a second rotating speed signal corresponding to the motor 3.

Further, with continued reference to fig. 1, the system further comprises: a coupler 6;

the coupling 6 is arranged between the motor 3 and the engine camshaft 7;

and the engine camshaft 7 is connected with the engine high-pressure fuel pump 4.

Therefore, the motor 3 is connected with the engine camshaft 7 through the coupler 6 in a hardware mode, the high-pressure fuel pump 4 of the engine can be synchronously driven to operate according to the rotating speed (second rotating speed signal) of the motor, fuel oil with target fuel pressure can be continuously, stably and accurately provided for the single cylinder engine 1, and smooth performance of transient working condition tests is guaranteed.

In an alternative embodiment, the tacho signal converter 2 is specifically configured to:

obtaining the ratio of the rotating speed of a crankshaft of the single cylinder engine to the rotating speed of a camshaft of the engine;

the first speed signal is converted to a second speed signal based on the ratio.

Here, the rotation speed of the crankshaft 5 is a first rotation speed signal, the rotation speed of the motor 3 is a second rotation speed signal, and the rotation speed of the engine camshaft 7 coincides with the rotation speed of the motor 3. Generally, in practical applications, the crankshaft speed is 2 times of the engine camshaft speed, so that the ratio between the crankshaft speed of the single cylinder engine 1 and the engine camshaft speed is 2, and therefore the first speed signal is converted into the second speed signal based on the ratio, including:

converting the first rotating speed signal into a second rotating speed signal based on the formula R2-R1/2; wherein, R1 is the first rotating speed signal, and R2 is the second rotating speed signal.

It is noted that the larger the first rotation speed signal, the larger the required target fuel pressure, so that the fuel pressure can be adjusted by the engine high-pressure fuel pump 4 to obtain the target fuel pressure required by the single cylinder engine 1 during the test.

In an alternative embodiment, referring to fig. 1, the system further comprises:

one end of the oil rail 8 is connected with an output port of the high-pressure fuel pump 4 of the engine;

one end of the oil injector 9 is connected with the other end of the oil rail 8, and the other end of the oil injector 9 is connected with the combustion chamber of the single cylinder engine 1; in this way, the engine high-pressure fuel pump 4 can inject fuel of a target fuel pressure into the combustion chamber of the single cylinder engine 1 through the fuel rail 8 and the injector 9.

In an alternative embodiment, with continued reference to FIG. 1, the system further comprises:

the fuel tank 10 is used for supplying fuel to the engine fuel pump 4;

and the fuel consumption meter 11 is arranged on a fuel supply pipeline between the fuel tank 10 and the high-pressure fuel pump 4 of the engine, and the fuel consumption meter 11 is used for measuring fuel consumption. Wherein, the fuel consumption meter 11 may be an AVL fuel consumption meter.

During the operation of the single cylinder engine 1, the fuel consumption can be measured accurately by the fuel consumption meter 11. Moreover, because the fuel oil in the embodiment comes from the oil depot 10, the single cylinder engine 1 can continuously operate for a long time, and the stable continuity of the test process is ensured.

It should be noted that the dashed arrows in fig. 1 represent signal lines, and the solid arrows represent fuel lines.

In the embodiment, the rotating speed signal of the single-cylinder engine crankshaft and the rotating speed signal of the motor are synchronized through the rotating speed signal converter, namely, the rotating speed signal of the single-cylinder engine crankshaft and the rotating speed of the engine camshaft are synchronized, so that the engine camshaft synchronously drives the high-pressure fuel pump to operate; because the fuel pressure and the first rotating speed signal have a certain corresponding relation, the fuel pressure can be synchronously adjusted according to the first rotating speed signal, and therefore continuous and stable fuel pressure can be provided for the single cylinder engine; compared with the mode that the fuel pressure is regulated after the fuel pressure of the fuel rail is measured by an additional pressure sensor in the prior art, the method can improve the regulation precision of the fuel pressure, provide continuous, stable and accurate fuel pressure for the single-cylinder engine, and further ensure that the transient working condition test can be smoothly carried out.

Based on the same inventive concept, the embodiment further provides a fuel supply method for a single-cylinder engine stand, which is applied to a fuel supply system for a single-cylinder engine stand, and as shown in fig. 2, the method comprises the following steps:

s210, acquiring a first rotating speed signal of the single cylinder, and converting the first rotating speed signal into a second rotating speed signal;

one end of the rotating speed signal converter 2 is electrically connected with a crankshaft 5 of the single cylinder engine 1 through a signal wire, and the other end of the rotating speed signal converter 2 is electrically connected with the motor 3 through a signal wire; the rotating speed signal converter 2 is used for collecting the rotating speed of the crankshaft, and the rotating speed of the crankshaft is also a first rotating speed signal; and then converting the first rotating speed signal into a second rotating speed signal corresponding to the motor 3.

In an alternative embodiment, converting the first speed signal to a second speed signal comprises:

obtaining the ratio of the rotating speed of a crankshaft of the single cylinder engine to the rotating speed of a camshaft of the engine;

the first speed signal is converted to a second speed signal based on the ratio.

Here, the rotation speed of the crankshaft 5 is a first rotation speed signal, the rotation speed of the motor 3 is a second rotation speed signal, and the rotation speed of the engine camshaft 7 coincides with the rotation speed of the motor 3. Generally, in practical applications, the crankshaft speed is 2 times of the engine camshaft speed, so that the ratio between the crankshaft speed of the single cylinder engine 1 and the engine camshaft speed is 2, and therefore the first speed signal is converted into the second speed signal based on the ratio, including:

converting the first rotating speed signal into a second rotating speed signal based on the formula R2-R1/2; wherein, R1 is the first rotating speed signal, and R2 is the second rotating speed signal.

It is noted that the larger the first rotation speed signal, the larger the required target fuel pressure, so that the fuel pressure can be adjusted by the engine high-pressure fuel pump 4 to obtain the target fuel pressure required by the single cylinder engine 1 during the test.

S211, synchronously driving a high-pressure fuel pump to operate according to the second rotating speed signal, and providing fuel oil with target fuel oil pressure for the single cylinder engine;

after the second rotating speed signal is determined, the high-pressure fuel pump 4 is driven to operate synchronously according to the second rotating speed signal, and the target fuel pressure is provided for the single cylinder engine 1. The target fuel pressure and the first rotating speed signal have a corresponding relation.

Specifically, the motor 3 is connected with the engine camshaft 7 through the coupler 6 in a hardware mode, so that the high-pressure fuel pump 4 of the engine can be synchronously driven to operate according to the rotating speed (second rotating speed signal) of the motor, fuel oil with target fuel pressure can be continuously, stably and accurately supplied to the single cylinder engine 1, and smooth transient working condition tests are guaranteed.

During the operation of the single cylinder engine 1, the fuel consumption can be measured accurately by the fuel consumption meter 11. Moreover, because the fuel oil in the embodiment comes from the oil depot 10, the single cylinder engine 1 can continuously operate for a long time, and the stable continuity of the test process is ensured.

For example, taking a single cylinder engine under the working condition of 1500r/min and 3bar as an example, when the rotating speed of the crankshaft reaches 1500r/min, at this time, the first rotating speed signal is 1500r/min, and the first rotating speed signal can be divided by 2 through the rotating speed converter 1 to obtain a second rotating speed signal, wherein the second rotating speed signal is 750 r/min; that is, the rotating speed of the motor 3 is 750r/min (which is consistent with the rotating speed of the engine camshaft 7), and the motor 3 drives the engine camshaft 7, so as to drive the engine high-pressure fuel pump 4 to work, and provide fuel with target fuel pressure for the single cylinder engine. During the operation of the single cylinder engine, the oil consumption is accurately measured by the oil consumption meter 11.

It should be noted that the method provided in the present embodiment is an implementation method of the system, and therefore, implementation manners of all components in the system may specifically refer to the system, which is not described herein again.

Based on the same inventive concept, the present embodiment provides a computer apparatus 300, as shown in fig. 3, including a memory 310, a processor 320, and a computer program 311 stored on the memory 310 and operable on the processor 320, wherein the processor 320 executes the computer program 311 to implement the following steps:

acquiring a first rotating speed signal of the single cylinder 1, and converting the first rotating speed signal into a second rotating speed signal;

synchronously driving the high-pressure fuel pump of the engine to operate according to the second rotating speed signal, and providing fuel oil with target fuel oil pressure for the single cylinder engine 1; wherein the content of the first and second substances,

the target fuel pressure has a corresponding relationship with the first rotation speed signal.

In particular embodiments, any of the foregoing embodiments may be implemented when processor 320 executes computer program 311.

Since the computer device described in this embodiment is a device used for implementing the fuel supply method for a single cylinder engine stand according to this embodiment, a person skilled in the art can understand the specific implementation of the computer device of this embodiment and its various modifications based on the methods described in the foregoing embodiments of this application, and therefore, how to implement the method in this embodiment by the server is not described in detail here. The equipment used by those skilled in the art to implement the methods in the embodiments of the present application is within the scope of the present application.

Based on the same inventive concept, the present embodiment provides a computer-readable storage medium 400, as shown in fig. 4, on which a computer program 411 is stored, the computer program 411 implementing the following steps when being executed by a processor:

acquiring a first rotating speed signal of the single cylinder 1, and converting the first rotating speed signal into a second rotating speed signal;

synchronously driving the high-pressure fuel pump of the engine to operate according to the second rotating speed signal, and providing fuel oil with target fuel oil pressure for the single cylinder engine 1; wherein the content of the first and second substances,

the target fuel pressure has a corresponding relationship with the first rotation speed signal.

In a specific implementation, the computer program 411 may implement any of the foregoing embodiments when executed by a processor.

The high-pressure fuel supply system, the method, the medium and the equipment for the single-cylinder engine stand provided by the invention have the beneficial effects that at least:

the invention provides a high-pressure fuel supply system, a method, a medium and equipment for a single-cylinder engine rack, wherein the system comprises: a single cylinder engine; the rotating speed signal converter is used for acquiring a first rotating speed signal of the single cylinder engine and converting the first rotating speed signal into a second rotating speed signal; the motor is used for receiving the second rotating speed signal and synchronously driving the high-pressure fuel pump to operate according to the second rotating speed signal; the engine high-pressure fuel pump is used for providing target fuel pressure for the single cylinder engine; the target fuel pressure and the first rotating speed signal have a corresponding relation; therefore, the rotating speed signal of the single-cylinder engine crankshaft is synchronized with the rotating speed signal of the motor through the rotating speed signal converter, namely, the rotating speed signal of the single-cylinder engine crankshaft is synchronized with the rotating speed of the engine camshaft, so that the engine camshaft synchronously drives the high-pressure fuel pump to operate, and the fuel pressure and the first rotating speed signal have a certain corresponding relation, so that the fuel pressure is synchronously adjusted according to the first rotating speed signal, and continuous and stable fuel pressure can be provided for the single-cylinder engine; compared with the mode that the fuel pressure is regulated after the fuel pressure of the fuel rail is measured by an additional pressure sensor in the prior art, the method can improve the regulation precision of the fuel pressure, provide continuous, stable and accurate fuel pressure for the single cylinder engine, and further ensure that the transient working condition test can be smoothly carried out. The engine high-pressure fuel pump in the system can directly use the engine high-pressure fuel pump in the multi-cylinder engine test bed, so that the test cost is reduced; in addition, because the oil depot is used for supplying oil for the test process in the embodiment, the continuous operation of the single-cylinder engine test bed can be ensured, and the stability of the test process is improved.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.