Refrigerant Oil,Refrigerating Machine Oil,Synthetic Refrigerant Oil,Premium Refrigerant Oil Liaoning Yeboon Lubricating Oil Manufacturing Co.,Ltd. , https://www.yblube.com
I. Overview
Since 2001, both Europe and the United States have introduced second-stage emission regulations for non-road vehicles. To comply with these standards, engines larger than 10 liters must integrate electronic control systems along with air-to-air cooling technology. By 2005, the third-stage emission regulations were implemented, making it mandatory for all engines to use electronic control and air-to-air cooling in order to meet environmental requirements.
Electronic control technology in engines refers to the centralized management of various functions such as speed control, fuel systems, data acquisition, and fault diagnostics through an Electronic Control Unit (ECU). These systems communicate using Controller Area Network (CAN) bus technology, along with the internationally recognized J1939 protocol. The effective utilization of this technology is essential for real-time monitoring and control of engine performance.
In 2005, our company began equipping road rollers with electronically controlled engines. The first model, XD121, was powered by a QSB 3.9 Cummins engine. At that time, digital bus meters were introduced for the first time, demonstrating significant advantages in functionality and reliability.
II. Introduction to MURPHY Instruments
PowerView, developed by MURPHY Corporation in the U.S., is a sophisticated digital bus display instrument designed to provide operators with detailed engine parameters and service codes. It acts as a window into the operation of electronically controlled engines, offering real-time insights into engine performance.
**PowerView Appearance**
**PowerView Interface**
When the power is turned on, if the engine requires a pre-start procedure, PowerView displays “WAIT TO START.†The operator can start the engine once this message disappears. After starting, the engine parameters are shown on the screen, as illustrated in Figure 3. Depending on the settings, it can display either a single parameter or multiple parameters across different pages. A single page shows one pre-set parameter, while users can navigate through other parameters using the arrow keys. Sub-pages can simultaneously display up to four engine parameters.
On the engine parameter page, pressing the “Menu†button brings up the main menu, which includes seven options. Using the arrow keys, the user can scroll through the options and press the right key to continue navigating.
III. Application on Road Rollers
Digital CAN bus meters have been successfully integrated into our company’s road rollers, particularly in full hydraulic vibratory models such as XS191D, XS122D, YZC12G, and XD121. The installation of these meters has brought numerous benefits. First, they eliminate the need for traditional instruments like oil pressure gauges, water temperature meters, tachometers, and hour meters, simplifying the dashboard layout and making it more visually appealing. They also replace alarm indicators, such as oil pressure and water temperature alerts, improving clarity and aesthetics. As shown in Figure 4, the XS191D dashboard is clean and well-organized.
Second, these meters display previously unseen critical engine parameters, including fuel combustion efficiency, fuel consumption, engine load, and historical fault records. This allows for a deeper understanding of the engine’s condition, significantly aiding in maintenance and troubleshooting. Third, the working principle is straightforward, and wiring is simple and efficient, as shown in Figure 5.
**The XS191D Instrument Panel**
The XS191D panel eliminates the need for a tachometer, oil pressure gauge, water temperature gauge, and various warning lights, resulting in a sleek and modern design.
**Working Principle**
When installing the MURPHY bus instrument on a roller, the wiring process is straightforward. A 12VDC or 24VDC power supply is connected first, followed by a connection to the engine controller via the CAN bus line for data transmission. Additionally, PowerView can be equipped with analog pointer meters, which directly display data that drivers frequently monitor.
Important considerations during installation include:
1. A 120 ohm resistor should be installed between CAN high and CAN low near the PowerView terminal.
2. The cable used must meet the SAE J1939 control requirements.
3. Shielded RS485 cables should be used when connecting PVA meters.
4. If a backlight regulator is not used, the backlight should be grounded rather than connected.
IV. Conclusion
The implementation of digital CAN bus meters on road rollers has yielded excellent results. It has positioned our company at the forefront of advanced technology adoption, significantly enhancing the overall technical capabilities of our equipment.
October 06, 2025