CN115158013A - A display strategy of engine water temperature instrument for loader - Google Patents

Abstract

The application belongs to the field of auto parts, and in particular relates to a display strategy for an engine water temperature instrument for a loader. This application defines the corresponding outgoing message according to different engine models; occupies the CCSS (Common Channel Signaling System) channel to send the outgoing message to the water temperature instrument; identifies the outgoing message of the engine type through the water temperature instrument to determine The alarm temperature and torque limit temperature corresponding to different types of engines; according to the result displayed on the water temperature meter, it is judged whether to alarm or decide the torque limit. The invention solves the problem that after replacing the engine or the water temperature meter, if the program of the water temperature meter does not correspond to the engine model, the water temperature meter cannot realize an accurate temperature alarm according to the engine model, which leads to the self-protection of the engine torque limit when the engine temperature is too high, which affects the engine life.

Description

A display strategy of engine water temperature instrument for loader

technical field

The invention belongs to the field of auto parts, and in particular relates to a display strategy of an engine water temperature instrument for a loader.

Background technique

With the huge development of my country's construction machinery industry, loaders have become one of the important pillar industries. The loader instrument panel is a device that reflects the working conditions of each system of the loader. The water temperature meter reflects whether the working temperature of the engine is normal. Usually, different models of loader engines have different water temperature alarm temperatures. After replacing the engine or water temperature meter, if the water temperature meter program does not correspond to the engine model, the water temperature meter cannot achieve accurate temperature alarm according to the engine model, and when the engine temperature is too high, the engine torque limit will protect itself, which will seriously affect the loader. service life.

Therefore, how to match different types of engines through the same water temperature instrument and realize the versatility of the water temperature instrument is a technical problem to be solved urgently in the art.

SUMMARY OF THE INVENTION

The present invention provides a display strategy of an engine water temperature instrument for a loader, to solve the problem that the engine water temperature instrument for a loader cannot be universally used for different types of engines in the prior art. As shown in FIG. 1 , the method includes:

Step 1: Define outgoing messages corresponding to different engine models according to the upper ECU (Electronic Control Unit) installed on the engine, and the outgoing message structure defined by the engine follows the SAEJ1939 protocol based on the CAN (Controller AreaNetwork) protocol;

Specifically, the engine CAN (Controller Area Network) protocol is used for communication between various components in the car, and the corresponding outgoing message is written through ASCII (American Standard Code for Information Interchange), and the ASCII code is used to write the corresponding outgoing message. The outgoing message is the general code of each computer system, which can be recognized by different system equipment;

Step 2: Occupy the CCSS (Common Channel Signaling System) channel to send the outgoing message to the water temperature meter;

Specifically, the CCSS channel is a common channel signaling system, which can ensure that different messages corresponding to different models can be transmitted in the CCSS channel;

Step 3: Determine the alarm temperature and torque limit temperature corresponding to the engine of different models by using the water temperature meter to send out messages from the engine type;

Step 4: According to the result displayed on the water temperature instrument, determine whether an alarm is required.

Specifically, the water temperature meter displays the range of the engine temperature according to the identified engine type, and judges whether an alarm is required according to the display result on the water temperature meter. If the water temperature does not exceed the alarm temperature, the alarm is not required. If the water temperature If the temperature exceeds the alarm temperature but does not reach the torque limit temperature, the water temperature meter starts to alarm; if the water temperature exceeds the torque limit temperature, the engine cannot be started.

Specifically, the pointer of the water temperature meter points to different areas and the representative results are as follows, as shown in Figure 2:

The area between T~T1 represents the alarm temperature area; the area between t0~t1 represents the safe temperature area; the area between t1~t2 is the water temperature range of the optimal fuel consumption area of the engine, and the user’s “safety perception” experience is the best area; the area between t2~t3 "cold car" work area;

Point T represents the starting point of the alarm temperature of the instrument, point T1 represents the critical point of the torque limit temperature of the instrument; point t0 is the critical point of the temperature of the engine safety zone, t0=T-3; point t1 is the maximum temperature of the water temperature in the optimal fuel consumption zone of the engine ; Point t2 is the minimum temperature of the water temperature in the optimal fuel consumption area of the engine; point t3 is the critical point of water temperature in the "cold car" working area of the engine;

Further, if the pointer of the water temperature meter is between the t0~t2 area, it means that the engine is at a safe temperature, and no alarm is required; if the pointer of the water temperature meter is between the T~T1 area, it means that the engine temperature is too high, at this time Start the alarm; if the pointer of the water temperature meter points to the range beyond T1 point, the engine reaches the torque limit temperature and starts to protect itself.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 shows the operation flow chart of a display strategy of engine water temperature instrument for loader;

2 shows an instrument display diagram of an engine water temperature instrument display strategy for a loader in an embodiment of the present invention;

FIG. 3 shows outgoing messages corresponding to each loader model in a display strategy of an engine water temperature meter for a loader in an embodiment of the present invention;

Fig. 4 shows the schematic diagram that the engine temperature in the display strategy of an engine water temperature instrument for a loader is out of a safe area in an embodiment of the present invention;

5 shows a schematic diagram of an engine temperature in an alarm temperature zone in a display strategy of an engine water temperature meter for a loader in an embodiment of the present invention;

FIG. 6 is a schematic diagram showing that the engine temperature and temperature reach the torque limit temperature in a display strategy of an engine water temperature instrument for a loader in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

As shown in Figure 2 and Figure 3: the relationship between the nodes displayed on the water temperature meter is as follows:

The area between T~T1 represents the alarm temperature area; the area between t0~t1 represents the safe temperature area; the area between t1~t2 is the water temperature range of the optimal fuel consumption area of the engine, and the user’s “safety perception” experience is the best area; the area between t2~t3 "cold car" work area;

Point T represents the starting point of the alarm temperature of the instrument, point T1 represents the critical point of the torque limit temperature of the instrument; point t0 is the critical point of the temperature of the engine safety zone, t0=T-3; point t1 is the maximum temperature of the water temperature in the optimal fuel consumption zone of the engine ; Point t2 is the minimum temperature of the water temperature in the optimal fuel consumption area of the engine; point t3 is the critical point of water temperature in the "cold car" working area of the engine;

Tb = engine alarm temperature, for example, 113℃ corresponding to WP10H;

Tx = engine torque limit temperature, for example, 115°C corresponding to WP10H;

T=Tb

T1=Tx

t0=Tb-3

According to the upper ECU (Electronic Control Unit) installed on the engine, the outgoing messages corresponding to different engine models are defined, and the outgoing message structure defined by the engine follows the SAEJ1939 protocol based on the CAN (Controller Area Network) protocol;

The engine CAN (Controller Area Network) protocol is used for communication between various components in the car, and the corresponding outgoing messages are written through ASCII (American Standard Code for Information Interchange), and the ASCII-encoded external message is used. The sent message is a general code for each computer system, and can be recognized by different system equipment;

Specific embodiment one:

As shown in FIG. 4 , this embodiment provides a loader engine with an engine model of WP6/WP10, the alarm temperature Tb/torque limit temperature Tx of the WP6/WP10 is 103/105°C, and the water temperature meter is installed. After that, start the engine, when the engine is working, first customize the outgoing message of the engine, and convert the engine into an outgoing message that can be recognized by the water temperature meter according to the ASCII code, W is converted to '87', P is converted is '80', 6 is converted to '54', / is converted to '57', W is converted to '87', P is converted to '80', 1 is converted to '49', and 0 is converted to '48'; Perform hexadecimal format conversion on the generated outgoing characters to obtain the format-converted message;

The message generated after the format conversion is sent to the water temperature meter through the CCSS (Common Channel Signaling System) channel;

The water temperature meter determines that the engine corresponding to the water temperature is WP6/WP10 by analyzing the outgoing message of the identified engine type to generate the corresponding engine model, and determines the alarm temperature Tb corresponding to the model according to the identified model. /The limit torque Tx is 103/105℃;

As shown in Figure 4, at this time, the pointer of the water temperature meter points to 95°C, between t1 and t2, indicating that the engine temperature is not only within the safe range at this time, but also in the best area for the user's "safety perception" experience.

Specific embodiment two:

As shown in FIG. 5 , this embodiment provides a loader engine with an engine model of WP10H. The alarm temperature Tb/torque limit temperature Tx of the WP10H is 113/115°C. After the water temperature meter is installed, the engine is started. , when the engine is working, first customize the outgoing message of the engine, and convert the engine into an outgoing message that can be recognized by the water temperature meter according to ASCII code, W is converted to '87', and P is converted to '80' , 1 is converted to '49', 0 is converted to '48', H is converted to '72', since the engine model is less than 8 digits, the remaining three vacancies are filled with '*', and the ASCII code of '*' The value is '42', and then hexadecimal format conversion is performed according to the generated outgoing characters to obtain the format-converted message;

The message generated after the format conversion is sent to the water temperature meter through the CCSS (Common Channel Signaling System) channel;

The water temperature meter generates a corresponding character string WP10H*** by identifying the outgoing message of the engine type, and determines that the corresponding engine is WP10H according to the character string generated by the analysis, and determines according to the identified model. The alarm temperature Tb/torque limit temperature Tx corresponding to the model is 113/115°C;

As shown in Figure 5, at this time, the pointer of the water temperature meter points between T1 and T, indicating that the engine temperature exceeds 113 °C but does not reach the torque limit temperature of 115 °C, and the water temperature meter starts to alarm, prompting the operator to stop the operation and reduce the engine temperature. temperature.

Specific embodiment three:

As shown in FIG. 6 , this embodiment provides a loader engine with an engine model of WP4.6N. The alarm temperature Tb/torque limit temperature Tx of the WP4.6N is 108/110°C, and the water temperature meter is installed. After that, start the engine, when the engine is working, first customize the outgoing message of the engine, and convert the engine into an outgoing message that can be recognized by the water temperature meter according to the ASCII code, W is converted to '87', P is converted is '80', 4 is converted to '52', . is converted to '46', 6 is converted to '54', and N is converted to '78'. Since the engine model is less than eight digits, the remaining two vacancies are used as ' *' is completed, the ASCII code value of '*' is '42', and then hexadecimal format conversion is performed according to the generated outgoing characters to obtain the format-converted message;

The message generated after the format conversion is sent to the water temperature meter through the CCSS (Common Channel Signaling System) channel;

The water temperature meter generates a corresponding character string WP4.6N** by identifying the outgoing message of the engine type, and determines that the corresponding engine is WP4.6N according to the character string generated by the analysis, and according to the identified engine The corresponding alarm temperature Tb/torque limit temperature Tx of the model is determined to be 108/110°C;

As shown in Figure 6, the pointer of the water temperature meter points to point T1 at this time, indicating that the engine temperature has reached the torque limit temperature of 115°C at this time, the water temperature meter starts the torque limit, the engine stops working for self-protection, and prompts the operator to check the engine condition.

Claims (7)

1. a loader engine water temperature instrument display strategy, is characterized in that, described method comprises: The corresponding outgoing messages are defined according to different engine models, and the structure of the outgoing messages follows the engine controller local area network bus protocol; Occupy the CCSS (Common Channel Signaling System) channel to send the outgoing message to the water temperature instrument; Identify the outgoing message of the engine type through the water temperature instrument to determine the alarm temperature and torque limit temperature corresponding to the engine of different types; According to the result displayed on the water temperature meter, it is judged whether an alarm is required. If the water temperature does not exceed the alarm temperature, the alarm is not required. If the water temperature exceeds the alarm temperature but does not reach the torque limit temperature, the water temperature meter starts to alarm; if the water temperature exceeds the limit Twist the temperature and start protecting yourself. 2. The display strategy of an engine water temperature instrument for a loader as claimed in claim 1, wherein the definition of the corresponding outgoing messages according to different engine models includes: performing format conversion according to the engine models of different models, converting Each subsequent character generates a corresponding outgoing character according to the ASCII code, and performs hexadecimal format conversion according to the generated outgoing character to obtain a format-converted message. 3. A kind of engine water temperature instrument display strategy for loader as claimed in claim 2, wherein, the character length of the engine models of the different models is no more than eight characters, and the characters whose length is less than eight characters are filled with "*" . 4. A kind of engine water temperature instrument display strategy for a loader as claimed in claim 1, wherein, the water temperature instrument to identify the outgoing message of the message outgoing type comprises, the message is parsed, according to the parsing ASCII The character corresponding to the code is used to determine the engine model. 5. The display strategy of an engine water temperature instrument for a loader as claimed in claim 1, wherein the transmitting the message through the CCSS channel comprises: using the minimum unit signal unit for transmitting signaling information to transmit the message, and using Synchronous operation ensures the synchronous reception of the signal unit at the receiving end of the water temperature meter. 6. The display strategy of an engine water temperature instrument for a loader according to claim 1, wherein the range of the alarm temperature of the engine is 103°C-113°C; the torque limit temperature of the engine is 105°C-115°C . 7 . The display strategy of an engine water temperature instrument for a loader according to claim 1 , wherein the maximum safe temperature of the engine is 3° C. less than the alarm temperature of the engine. 8 .

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