Features and Applications of Electronically Controlled High-Pressure Common Rail Systems

Features and Applications of Electronically Controlled High-Pressure Common Rail Systems

1. Features of Electronically Controlled High-Pressure Common Rail Systems

[1] Freely adjustable injection pressure (common rail pressure control).

[2] Freely adjustable injection quantity.

[3] Freely adjustable injection timing. The start and end points of injection can be easily adjusted.

[4] Freely adjustable injection rate. Pre-injection, main injection, and post-injection can be achieved, and multi-stage injection can be implemented according to emission requirements.

[5] Higher injection pressure. Currently up to 160 MPa, and up to 200 MPa in the future.

[6] Injection pressure adapted to actual working conditions. In a high-pressure common rail system, the injection pressure (common rail pressure) is independent of engine speed and load and can be controlled independently. The common rail fuel pressure is measured by a common rail pressure sensor and compared with a set target injection pressure for reactive control.

[7] Compared with other electronically controlled diesel injection systems, the electronically controlled high-pressure common rail system has significant economic and technical advantages.

[8] It has more control parameters and more accurate control.

[9] It has good power performance, economy, and exhaust purification.

[10] The system oil pressure fluctuation is small.

[11] It uses a high-speed electromagnetic switching valve for control, resulting in high control sensitivity.

[12] It has a wide range of applications.

[13] The system cost is high, and maintenance costs are high. Comparison of the advantages and disadvantages of electronically controlled high-pressure common rail and electronically controlled unit pump: Comparison of three fuel injection systems for passenger car diesel engines

2. Application of the electronically controlled high-pressure common rail system

Suitable for various types of passenger cars, small, medium, and heavy-duty diesel engines, it is currently the mainstream technology and development trend of diesel engines.