阅读说明：本技术 气体喷射器组件及其控制芯片、控制方法 (Gas injector assembly, control chip thereof and control method thereof ) 是由 张恬 林超 徐亚超 杨飞赟 于 2020-05-09 设计创作，主要内容包括：本申请提供气体喷射器组件控制方法,该气体喷射器组件包括控制芯片、上段气轨、下段气轨及多个喷射器,所述控制芯片控制多个喷射器的开关,在同一时段仅有单个喷射器开而其他喷射器关,在所述喷射器开时,所述喷射器连通所述上段气轨及所述下段气轨,所述上段气轨中的气体通过所述喷射器喷射进入所述下段气轨,其特征在于,包括补偿工作模式,该补偿工作模式主要包括,该某特定喷射器未成功喷射,则通过延长其它喷射器的喷射时间补偿该特定喷射器未实际喷射的喷射量。使用本申请可以对气体喷射器进行有效补偿。(The application provides a control method of a gas injector assembly, the gas injector assembly comprises a control chip, an upper section gas rail, a lower section gas rail and a plurality of injectors, the control chip controls the on and off of the plurality of injectors, only a single injector is on and other injectors are off in the same time period, when the injectors are on, the injectors are communicated with the upper section gas rail and the lower section gas rail, and gas in the upper section gas rail is injected into the lower section gas rail through the injectors. The gas injector can be effectively compensated by using the application.)

1. A control method of a gas injector assembly, the gas injector assembly (100) comprises a control chip (4), an upper section gas rail (2), a lower section gas rail (6) and a plurality of injectors (7), the control chip (4) controls the on-off of the plurality of injectors (7), only a single injector (7) is on and other injectors (7) are off in the same time period, when the injectors (7) are on, the injectors (7) are communicated with the upper section gas rail (2) and the lower section gas rail (6), and gas in the upper section gas rail (2) is injected into the lower section gas rail (6) through the injectors (7), and the control method is characterized by comprising a compensation working mode, wherein the compensation working mode comprises the following steps,

-obtaining an actual pressure value in said upper air rail (6) at a certain point in time after a predetermined injection of a certain injector (7) has started;

judging whether the specific injector (7) successfully injects;

if the specific injector (7) does not inject successfully, the injection quantity that the specific injector (7) does not actually inject is compensated by extending the injection time of the other injectors (7).

2. The gas injector assembly control method according to claim 1, characterized in that whether the specific injector (7) successfully injects is judged by whether a pressure drop set at the time of starting injection of the specific injector (7) and the specific time point, which is a time when a predetermined injection is completed, coincides with a preset condition.

3. The gas injector assembly control method according to claim 1, characterized in that it is determined whether the specific injector (7) successfully injects by comparing the actual pressure value at the completion of injection set by the specific injector (7) with a preset pressure value, and the specific time point is a predetermined time at the completion of injection.

4. A gas injector assembly control method as claimed in claim 1 or 2 or 3, characterized by compensating for the amount of gas not injected by the particular injector (7) by extending the injection time of the injector which is activated next for that particular injector (7).

5. A gas injector assembly control method as claimed in claim 1 or 2 or 3, characterized by compensating for the amount of gas not injected by a particular injector (7) by extending the injection time of the whole injector except for said particular injection which was not injected successfully.

6. A gas injector assembly control method as claimed in claim 1, characterized by the step of obtaining an ambient temperature at which the gas injector assembly (100) is operating, and entering the compensation operating mode when the ambient temperature is below a predetermined value.

7. A gas injector assembly control method as claimed in claim 1, characterized by comprising the step of exiting said compensation mode of operation when it is detected that both said injectors (7) are operating normally and that the gas temperature is greater than a preset value.

8. Injector assembly control method according to any of claims 1 to 7, characterized in that the gas injector assembly (100) comprises a plurality of cylinders in gas communication with the gas rail (6), including a gas tank (1), a pressure reducing valve is arranged between the gas tank (1) and the upper gas rail (2), the injector is an electronic on-off valve, the gas is natural gas, and the actual pressure value is measured by a sensor.

9. Gas injector assembly control chip (4), characterized in that it has stored therein a non-volatile sequence of computer instructions that can complete the compensation mode of operation according to any one of claims 1 to 8.

10. Gas injector assembly (100) comprising a plurality of injectors (7) and an upper gas rail (2) and a lower gas rail (6) communicating with said injectors (7), said injectors (7) being controlled by a control chip (4) according to claim 9.

Technical Field

The present application relates to the field of gas injection, and more particularly to the field of gas injection formed with a plurality of injectors.

Background

Gas injectors are used as an effective complement to fuel injectors in a number of important applications where natural gas is used as a fuel. The gas injector is operated by a distributor support on which sensors are provided to collect pressure and temperature data in the gas injector.

Some gas injector assemblies include a plurality of injectors which, in use, sequentially inject gas into the gas rail. However, at cold start of the gas injector assembly, part of the injectors may not successfully complete the injection event due to air temperature. If one injector fails to complete injection, insufficient gas may be present in the following cylinder.

Disclosure of Invention

The application aims to provide a gas injector assembly, a control chip and a control method thereof.

In order to accomplish the above object, the present application provides a method for controlling a gas injector assembly, the gas injector assembly including a control chip, an upper stage gas rail, a lower stage gas rail, and a plurality of injectors, the control chip controlling the switching of the plurality of injectors, only a single injector being turned on and the other injectors being turned off at the same time period, the injectors communicating the upper stage gas rail and the lower stage gas rail when the injectors are turned on, the gas in the upper stage gas rail being injected into the lower stage gas rail through the injectors, the method including a compensation operation mode, the compensation operation mode including the steps of,

obtaining an actual pressure value in the upper section gas rail at a specific time point after a predetermined injection of a specific injector starts;

judging whether the specific injector successfully injects;

if the specific injector does not inject successfully, the injection quantity that the specific injector does not actually inject is compensated for by extending the injection time of the other injectors.

The present application is also characterized in that whether the specific injector successfully injects the fuel is determined by whether a pressure drop set by the specific injector at the time of starting injection and at the specific time point, which is when the predetermined injection is completed, coincides with a preset condition.

The method is characterized in that whether the specific injector successfully injects the fuel is judged by comparing an actual pressure value set by the specific injector when injection is completed with a preset pressure value, and the specific time point is preset injection completion time.

The present application also features compensating for an amount of gas not injected by the particular injector by extending an injection time of the injector that is next activated by the particular injector.

The present application also has a feature of compensating for the amount of gas that the specific injector does not inject by extending the injection time of the whole of the other injectors except for the specific injection that is not injected successfully.

The present application also features obtaining an ambient temperature of the gas injector assembly when operating, and entering the compensated operating mode when the ambient temperature is below a predetermined value.

The application also features a step of exiting the compensation mode of operation when the injector is detected to be operating normally and the gas temperature is greater than a predetermined value.

This application still has following characteristic, the gas injection ware subassembly include with a plurality of cylinders of gas rail gas intercommunication, including the gas tank, the gas tank with be provided with the relief pressure valve between the upper segment gas rail, the sprayer is the electronic switch valve, it is the natural gas that gas, the actual pressure value is measured and is obtained through setting up the sensor.

The present application additionally provides a gas injector assembly control chip characterized by having stored therein a non-volatile sequence of computer instructions that can accomplish the compensation mode of operation described above.

The present application further provides a gas injector assembly, including a plurality of injectors and the upper segment gas rail and the lower segment gas rail of injector intercommunication, as above control chip control the injector.

By using the technical scheme provided by the application, when the partial ejector cannot successfully eject, the gas ejector component can normally work through the compensation ejection of other ejectors.

Drawings

Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings, it being understood that the following description of the embodiments is only for the purpose of explanation and not limitation of the scope of the present application, and in the accompanying drawings:

FIG. 1 is a block diagram of an embodiment of a gas injector assembly of the present application;

FIG. 2 is a flow chart of a gas injector assembly control method of the present application.

Detailed Description

It should be understood that the drawings are for illustrative purposes only and are not intended to limit the application. The longitudinal axis of each device is understood in this application to be the axis of the device body in the longer direction.

Referring to FIG. 1, a block diagram of one embodiment of a gas injector assembly of the present application is shown. The gas injector assembly 100 includes a gas tank 1, the gas tank 1 communicating with an upper gas rail 2 through a pressure reducing valve (not shown) which can be opened or closed as desired. In some embodiments, including the present embodiment, the gas tank 1 is filled with natural gas, and the pressure reducing valve is an electronic pressure reducing valve and is controlled by the control chip 4 of the gas injector assembly 100. The upper gas rail 2 is in gas communication with a plurality of injectors 7, in this embodiment N, preferably 6. The injector 7 is an electronic switch valve and is controlled by the control chip 4. Meanwhile, the injector 7 is in gas communication with a lower section gas rail 6, and the lower section gas rail 6 is in gas communication with 6 cylinders 3 through 6 gas pipes (not numbered). It can be seen that in this embodiment the number of injectors 7 is the same as the number of cylinders 3, but may be different in other embodiments. In the present embodiment, the gas injector assembly 100 comprises a temperature sensor, in the present embodiment disposed on the injector 7, for measuring the temperature of the gas. The gas injector assembly 100 includes a gas pressure sensor, which in this embodiment is disposed in the upper gas rail 2, for measuring the pressure of the gas in the upper gas rail. Of course, in other embodiments, other manners of obtaining the values of the temperature and the pressure may be used, such as mathematical operations based on other parameters. Although the number of the injectors 7 is 6 in the present embodiment, only one injector 7 is controlled by the control chip 4 to inject the gas to the lower stage gas rail 6 in the same period.

Referring now to FIG. 2, therein is shown a flow chart of one embodiment of a method of controlling a gas injector assembly according to the present application. The control method comprises the following steps. First, in step S001, the temperature of the natural gas in the injector is measured by the temperature sensor, since the present control method can be used when the gas injector assembly is cold started, in which case the temperature of the natural gas in the injector is actually ambient temperature. When the ambient temperature is lower than the predetermined value, the process proceeds to step S002, i.e., the compensation operation mode. The predetermined value is stored in the control chip 4 in this embodiment and is 0 degree celsius (calibratable). In step S002, the gas pressure in the upper stage gas rail 2 of the 1 st injector 7 before the start of injection is obtained by the pressure sensor. Since a plurality of injectors 7 are sequentially operated under the control of the control chip 4, the injector 7 whose operation state needs to be measured is referred to as a specific injector in this application for convenience of explanation. In the present embodiment, the gas pressure is the same as that of the specific injector 7, and the gas pressure is lower than that in the gas tank 1. Next, the process proceeds to step S003, where it is determined whether the specific injector 7 has successfully injected, and the determination method of whether the injection has succeeded is explained here in two ways. The first is to determine the pressure drop between the pressure in the upper gas rail 2 before the injection of the specific injector 7 and the pressure value of the gas after the completion of the injection. Since, in theory, there is a certain reduction in pressure before and after injection of a particular injector 7, the value of this pressure reduction can be obtained by practical or theoretical calculations and stored in advance in the control chip 4. If the value of the actually measured pressure drop reaches the theoretical value of the pressure drop, it is determined that the specific injector 7 successfully injects, and the system returns to step S002 and measures the 2 nd specific injector 7. If the value of the pressure drop actually obtained before and after the operation of the 1 st specific injector 7 is smaller than the preset theoretical value of the pressure drop, the injection belonging to the specific injector 7 is unsuccessful. Alternatively, a theoretical value of the gas pressure in the upper gas rail 2 after the injection of the 1 st specific injector 7 is completed is obtained according to practice or theoretical operation, and the actual pressure value in the upper gas rail 2 after the injection of the 1 st specific injector is completed is preset. If the actual pressure value is the same as the aforementioned theoretical value, the specific injector 7 is considered to be successfully injected. If the actual pressure value is equal to the theoretical pressure value, the system returns to step S002 and starts measuring the 2 nd specific injector 7. If the actual pressure value is smaller than the theoretical pressure value, it is considered that the 1 st specific injector 7 is not successfully injected. In step S003, the amount of gas that is not injected by the specific injector 7 is compensated for by extending the injection time of the other injectors 7. The manner of this compensation injection is exemplified in two ways here. The first way is to extend the injection quantity of the 2 nd specific injector 7, and the extension of the injection time of the 2 nd specific injector 7 is completed to compensate the injection quantity of the 1 st specific injector 7. The second way is to lengthen the other injection amounts except for the 1 st specific injector 7 that cannot be successfully injected, and to collectively compensate for the injection amount of the unsuccessful injection of the 1 st specific injector 7 by lengthening the injection times of the other injectors on average. It is considered that in most cases the injector 7 is less likely to produce an injection failure if the gas temperature is above a certain temperature. Therefore, in the present embodiment, the step S004 is included, and if it is detected that the injectors (7) are all normally operated for a predetermined time and the gas temperature is greater than the preset value, the step of exiting the compensation operation mode is included.

In the present embodiment, the actual pressure value is a point in time at which the predetermined injection is completed, at which the pressure is measured by the sensor. In other embodiments, the point in time may be any particular point in time after the start of injection. The actual pressure value may be obtained by other means, such as calculation by software using a specific algorithm in combination with other data of the product.

In addition, the application also discloses a gas injector component control chip 4, and in order to cooperate with the implementation of the method, the control chip 4 stores a non-volatile computer instruction sequence which can complete the method when implemented.

Of course, other embodiments of the present application are also possible, and the present application is not limited to the embodiments described above.