A PEMS test method for the auxiliary engine of a sprinkler truck

Abstract

This invention discloses a PEMS testing method for a water sprinkler truck's auxiliary engine, belonging to the field of PEMS testing technology. It includes a gas analyzer and an exhaust flow meter installed on the left side of the gas analyzer. An exhaust pipe interface is located at the rear end of the exhaust flow meter and is used to connect to the water sprinkler truck's exhaust pipe. The test conditions of this invention represent the common operating conditions of water sprinkler trucks and can represent the engine's emission characteristics under actual operation. The test conditions have strong repeatability and short testing time, which is beneficial for product testing and development. By incorporating a solar panel and an inverter, the PEMS testing device can absorb solar energy through the solar panel during use, convert it into electrical energy, and then transmit it to the inverter. The inverter converts the direct current to alternating current, which is then transmitted to the battery for the device's use, thereby increasing the overall driving range.

Description

Technical Field

[0001] This invention relates to the field of PEMS testing technology, specifically a PEMS testing method for a water sprinkler truck auxiliary engine. Background Technology

[0002] With the continuous increase in the number of motor vehicles, the problem of motor vehicle pollution is becoming increasingly serious. Current emission regulations and certifications are based on data from laboratory environments. However, the operating conditions of motor vehicles during actual driving are quite complex, making emissions significantly affected by real-world conditions. This results in a large difference between the certification operating point and the actual driving operating point, meaning laboratory data may not accurately reflect the engine's actual emission conditions. Against this backdrop, the PEMS (Proof-of-Site Measurement System) was developed. PEMS involves installing emission testing equipment on motor vehicles traveling on actual roads to measure the vehicle's emissions and characteristics during real-world driving. With the promulgation and implementation of emission regulations for non-road mobile machinery, the control of pollutant emissions from non-road mobile machinery is becoming increasingly stringent. As a mobile non-road machine, the emissions from the auxiliary engine of a water truck also require corresponding emission controls. Currently, the industry lacks real-road emission testing methods specifically for this vehicle type.

[0003] However, the industry currently lacks PEMS testing methods for auxiliary engines of sprinkler trucks, which makes it easy for data to be inaccurate when using traditional PEMS testing methods. In addition, some existing PEMS testing devices consume a lot of energy during long-term use, while traditional PEMS testing devices generally use batteries of fixed capacity. When the battery is depleted, the PEMS testing device will stop operating, and its endurance needs to be improved. Furthermore, when the PEMS testing device is installed on the sprinkler truck, it is easily damaged by vibration, and its shock absorption effect needs to be improved.

[0004] Therefore, it is necessary to upgrade and modify the existing PEMS testing method for water truck auxiliary engines to overcome existing problems and shortcomings. Summary of the Invention

[0005] This invention aims to address the current lack of specific PEMS testing methods for auxiliary engines in sprinkler trucks. This lack of a dedicated PEMS testing method for sprinkler truck auxiliary engines leads to inaccurate data when using traditional PEMS testing methods. Furthermore, existing PEMS testing devices consume significant energy during prolonged use, and traditional PEMS testing devices typically use fixed-capacity batteries. When the battery is depleted, the PEMS testing device stops operating, requiring improved range. Additionally, the PEMS testing device is susceptible to damage due to vibration when mounted on a sprinkler truck, necessitating improved shock absorption. This invention provides a PEMS testing method for sprinkler truck auxiliary engines. By incorporating solar panels and an inverter, the PEMS testing device absorbs solar energy through the solar panels, converts it into electrical energy, and then transmits this electrical energy to the inverter. The inverter then converts the direct current (DC) to alternating current (AC) to power the battery, thereby increasing the overall range of the device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a PEMS testing method for a water sprinkler truck auxiliary engine, including a gas analyzer;

[0007] An exhaust flow meter is installed on the left side of the gas analyzer;

[0008] The exhaust pipe interface, located at the rear end of the exhaust flow meter, is used to connect to the exhaust pipe of the sprinkler truck.

[0009] The PN / PM measurement module is located above the gas analyzer, and each of the four bottom corners of the PN / PM measurement module is connected to a support column that is connected to the gas analyzer.

[0010] A flow meter control box is located above the PN / PM measurement module. A controller is installed on the top of the flow meter control box, and an emergency stop button is provided on the top left of the controller.

[0011] Support rods are connected to the four bottom corners of the gas analyzer, and the lower end of the support rods is connected to a damping spring shock absorber.

[0012] In a preferred embodiment, the bottom of the damping spring shock absorber is equipped with a mounting plate, and the top four corners of the mounting plate are all connected by fixing bolts, which pass through the mounting plate and are connected to the sprinkler truck.

[0013] In a preferred embodiment, the gas analyzer has a PC interface on the right side of its surface that connects to a PC.

[0014] In a preferred embodiment, the gas analyzer is equipped with a GPS module for GPS positioning. The right end of the GPS module is equipped with a battery, and the battery is electrically connected to the inverter.

[0015] In a preferred embodiment, the right end of the battery is provided with an environmental parameter module installed inside the gas analyzer, and the environmental parameter module is used to detect the ambient temperature and humidity.

[0016] In a preferred embodiment, the PN / PM measurement module is used for measuring atmospheric pressure and particulate matter.

[0017] In one preferred embodiment, the gas analyzer is equipped with a gas analysis module that can measure the concentrations of CO, CO2, NO, NO2, and THC emissions.

[0018] In a preferred embodiment, the top end of each exhaust pipe interface is connected to a connecting pipe in a parallel manner.

[0019] As a preferred embodiment, a PEMS testing method for a water sprinkler truck auxiliary engine is also provided, comprising the following steps:

[0020] S1: Install the gas analyzer and exhaust flow meter reasonably according to the exhaust pipe layout of the sprinkler truck, and carry out debugging preparations before the test.

[0021] S2: The auxiliary engine of the water truck starts spraying water. The auxiliary engine speed is 1400 rpm, and the working mode is front spray frame spraying water for 10 minutes.

[0022] S3: Auxiliary engine speed 1800rpm, working mode is front water spray frame spraying water for 10 minutes.

[0023] S4: Auxiliary engine speed 2500rpm, working mode is front water spray frame spraying water for 10 minutes.

[0024] S5: Auxiliary engine speed 2700rpm, working mode is front water spray frame spraying water for 10 minutes.

[0025] S6: The auxiliary engine speed is 1400 rpm, and the working mode is to spray water with a handheld spray gun for 10 minutes.

[0026] S7: Auxiliary engine speed 1800rpm, working mode is rear handheld spray gun spraying water for 10 minutes.

[0027] S8: Repeat steps S2-S7, with a total test time of 2 hours. If the cumulative power of the auxiliary engine under the entire operating condition is 5-7 times the NRTC cycle power of the main engine, then stop the test.

[0028] S9: After the test is completed, data processing is performed to obtain the final emission results.

[0029] Beneficial effects:

[0030] (1) The PEMS test method for the auxiliary engine of the sprinkler truck has improved the structure, making the data of the auxiliary engine of the sprinkler truck more accurate when the PEMS test method is used. It can save energy consumption of the PEMS test device during use and increase the overall endurance. When the PEMS test device is installed on the sprinkler truck, it can reduce the occurrence of damage to the PEMS test device due to vibration. Its shock absorption effect is strong.

[0031] (2) The advantages of this method for testing the auxiliary engine of a water truck are: the test conditions of this invention are the common working conditions of water trucks, which can represent the emission characteristics of the engine under actual operation. The test conditions have strong repeatability and short test time, which is conducive to product testing and development.

[0032] Secondly, by incorporating damping spring shock absorbers, specifically those mounted on the top of the mounting plate, the damping spring shock absorbers work in a damping manner. When a downward force is applied to the shock absorber, the internal damping rod moves downward, and the damping medium within the damping cavity flows upward along the gaps around the damping block, thus achieving damping and reducing vibration amplitude. When the external force applied to the shock absorber disappears, the internal damping rod moves upward, and the damping medium within the damping cavity flows downward again along the gaps around the damping block, thereby reducing vibration and amplitude, and ultimately minimizing the impact of vibration on the device. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 This is a schematic diagram of the back structure of the present invention.

[0036] Figure 3 This is a schematic diagram of the overall structure of the flow meter control box of the present invention.

[0037] Figure 4 This is a schematic diagram of the internal structure of the gas analyzer of the present invention.

[0038] Figure 1-4 The components are as follows: 1. Gas analyzer; 2. Exhaust flow meter; 3. Exhaust pipe interface; 4. Support rod; 5. Damping spring shock absorber; 6. Mounting plate; 7. Support column; 8. PN / PM measurement module; 9. Flow meter control box; 10. Controller; 11. Emergency stop button; 12. GPS module; 13. Battery; 14. Environmental parameter module; 15. PC interface. Detailed Implementation

[0039] The present invention will be further described below with reference to embodiments.

[0040] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0041] Please see Figure 1-4 A PEMS test method for a water truck auxiliary engine includes a gas analyzer 1 for analyzing the concentration of various gases in the exhaust gas, an exhaust flow meter 2 installed on the left side of the gas analyzer 1, and an exhaust pipe interface 3 located at the rear end of the exhaust flow meter 2 for connecting to the exhaust pipe of the water truck. The exhaust gas is then introduced into the gas analyzer 1 for testing.

[0042] The PN / PM measurement module 8 is located above the gas analyzer 1 and is used to detect atmospheric pressure and particulate matter. The bottom four corners of the PN / PM measurement module 8 are connected to the support pillars 7 connected to the gas analyzer 1 to support the PN / PM measurement module 8.

[0043] The flow meter control box 9 is located above the PN / PM measurement module 8. The flow meter control box 9 is used to control and adjust the exhaust flow meter 2. A controller 10 is installed on the top of the flow meter control box 9. An emergency stop button 11 is provided on the top left end of the controller 10. When this device is in use, it can be controlled and adjusted through the controller 10. The emergency stop button 11 can shut down the entire device in an emergency.

[0044] Support rods 4 are connected to the four bottom corners of the gas analyzer 1. The lower end of the support rods 4 is connected to a damping spring shock absorber 5. When a force is applied downward to the shock absorber through the action of the damping spring shock absorber 5, the internal damping rod will move downward, and the damping medium in the damping cavity will flow upward along the gaps around the damping block, thereby playing a role in damping and shock absorption, thus reducing the amplitude. When the external force applied to the shock absorber disappears, the internal damping rod will move upward, and the damping medium in the damping cavity will flow downward again along the gaps around the damping block, thereby reducing vibration and lowering the amplitude, thus reducing the impact of vibration on the device.

[0045] Furthermore, a mounting plate 6 is installed at the bottom of the damping spring shock absorber 5. Fixing bolts are connected through the top four corners of the mounting plate 6, and the fixing bolts pass through the mounting plate 6 to connect with the sprinkler truck. When installing this device, the mounting plate 6 is installed on the sprinkler truck by fixing bolts, thereby fixing the device.

[0046] Furthermore, the right end of the surface of the gas analyzer 1 is provided with a PC interface 15 for connecting to a PC. The gas analyzer 1 can be connected to a PC via the PC interface 15 for data transmission.

[0047] Furthermore, the gas analyzer 1 is equipped with a GPS module 12 for GPS positioning. The right end of the GPS module 12 is equipped with a battery 13, which is electrically connected to the inverter. The battery 13 supports more than 6 hours of continuous operation.

[0048] Furthermore, the right end of the battery 13 is provided with an environmental parameter module 14 installed inside the gas analyzer 1, and the environmental parameter module 14 is used to detect the ambient temperature and humidity.

[0049] Furthermore, the PN / PM measurement module 8 is used for measuring atmospheric pressure and particulate matter.

[0050] Furthermore, the gas analyzer 1 is equipped with a gas analysis module that can measure the concentrations of CO, CO2, NO, NO2, and THC emissions.

[0051] Furthermore, each exhaust pipe interface 3 has a connecting pipe connected to its top end in a parallel manner. The connecting pipe is used to connect to the gas analyzer 1. The connecting pipe is connected to the interface on the surface of the gas analyzer 1 through the gas pipe, so that the gas enters the gas analyzer 1 through the gas pipe for analysis.

[0052] This embodiment also provides a PEMS testing method for the auxiliary engine of a sprinkler truck, including the following steps:

[0053] S1: Install the gas analyzer 1 and exhaust flow meter 2 according to the exhaust pipe layout of the sprinkler truck, and prepare for the test.

[0054] S2: The auxiliary engine of the water truck starts spraying water. The auxiliary engine speed is 1400 rpm, and the working mode is front spray frame spraying water for 10 minutes.

[0055] S3: Auxiliary engine speed 1800rpm, working mode is front water spray frame spraying water for 10 minutes.

[0056] S4: Auxiliary engine speed 2500rpm, working mode is front water spray frame spraying water for 10 minutes.

[0057] S5: Auxiliary engine speed 2700rpm, working mode is front water spray frame spraying water for 10 minutes.

[0058] S6: The auxiliary engine speed is 1400 rpm, and the working mode is to spray water with a handheld spray gun for 10 minutes.

[0059] S7: Auxiliary engine speed 1800rpm, working mode is rear handheld spray gun spraying water for 10 minutes.

[0060] S8: Repeat steps S2-S7, with a total test time of 2 hours. If the cumulative power of the auxiliary engine under the entire operating condition is 5-7 times the NRTC cycle power of the main engine, then stop the test.

[0061] S9: After the test is completed, data processing is performed to obtain the final emission results.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PEMS test method for a water sprinkler truck auxiliary engine, characterized in that, Includes the following steps: S1: Install the gas analyzer (1) and exhaust flow meter (2) reasonably according to the exhaust pipe layout of the sprinkler truck, and make debugging preparations before the test; S2: The auxiliary engine of the sprinkler truck starts spraying water. The auxiliary engine speed is 1400 rpm, and the working mode is front spray frame spraying water for 10 minutes. S3: The auxiliary engine speed is 1800 rpm, and the working mode is front water spray frame spraying water for 10 minutes; S4: Auxiliary engine speed 2500rpm, working mode is front water spray frame spraying water, continuous for 10 minutes; S5: The auxiliary engine speed is 2700 rpm, and the working mode is front water spray frame spraying water for 10 minutes; S6: Auxiliary engine speed 1400rpm, working mode is rear hand-held spray gun spraying water for 10 minutes; S7: Auxiliary engine speed 1800rpm, working mode is rear handheld spray gun spraying water for 10 minutes; S8: Repeat steps S2-S7, with a total test time of 2 hours. If the cumulative work of the auxiliary engine under the entire operating condition is 5-7 times the NRTC cycle work of the main engine, then stop the test. S9: After the test is completed, data processing is performed to obtain the final emission results; The test method uses a PEMS test device, which includes a gas analyzer (1). Exhaust flow meter (2), which is installed on the left side of gas analyzer (1); The exhaust pipe interface (3) is located at the rear end of the exhaust flow meter (2) and is used to connect the exhaust pipe of the sprinkler truck. The PN / PM measurement module (8) is located above the gas analyzer (1), and the bottom four corners of the PN / PM measurement module (8) are connected to the support column (7) connected to the gas analyzer (1). A flow meter control box (9) is located above the PN / PM measurement module (8). A controller (10) is installed on the top of the flow meter control box (9). An emergency stop button (11) is provided on the top left of the controller (10). Support rods (4) are connected to the four bottom corners of the gas analyzer (1), and the lower end of the support rods (4) is connected to damping spring shock absorbers (5).

2. The PEMS test method for the auxiliary engine of a sprinkler truck according to claim 1, characterized in that: The damping spring shock absorber (5) is equipped with a mounting plate (6) at its bottom. The four corners of the top of the mounting plate (6) are connected by fixing bolts, and the fixing bolts pass through the mounting plate (6) to connect with the water truck.

3. The PEMS test method for the auxiliary engine of a sprinkler truck according to claim 1, characterized in that: The gas analyzer (1) has a PC interface (15) connected to a PC on the right side of its surface.

4. The PEMS test method for the auxiliary engine of a sprinkler truck according to claim 1, characterized in that: The gas analyzer (1) is equipped with a GPS module (12) for GPS positioning. The right end of the GPS module (12) is equipped with a storage battery (13), and the storage battery (13) is electrically connected to the inverter.

5. The PEMS test method for the auxiliary engine of a sprinkler truck according to claim 4, characterized in that: The right end of the battery (13) is provided with an environmental parameter module (14) installed inside the gas analyzer (1), and the environmental parameter module (14) is used to detect the ambient temperature and humidity.

6. The PEMS test method for the auxiliary engine of a sprinkler truck according to claim 1, characterized in that: The PN / PM measurement module (8) is used for measuring atmospheric pressure and particulate matter.

7. The PEMS test method for the auxiliary engine of a sprinkler truck according to claim 1, characterized in that: The gas analyzer (1) is equipped with a gas analysis module that can measure the concentrations of CO, CO2, NO, NO2, and THC emissions.

8. The PEMS test method for the auxiliary engine of a sprinkler truck according to claim 1, characterized in that: The top end of each exhaust pipe interface (3) is connected to a connecting pipe in a parallel manner.

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