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Denso N-Series 4HK1

Manuals and User Guides for Denso N-Series 4HK1. We found 1 manuals for free downloads Service manual

The N-Series 4HK1 Common Rail System (CRS) is designed to improve combustion and reduce emissions. This system features a high-pressure supply pump, a rail with a pressure of 200 MPa, and G3 type injectors, among other components. The CRS also includes a Diesel Particulate Filter (DPF) and urea Selective Catalytic Reduction (SCR) to reduce emissions, ensuring compliance with US10 exhaust gas regulations.

Key Features

  • High-pressure system (200 MPa)
  • Positive pressure filter use
  • G3 type injectors
  • Diesel Particulate Filter (DPF)
  • Urea Selective Catalytic Reduction (SCR)

Pages: 34 Denso N-Series 4HK1 Service manual

Brand: Denso Category: Industrial & lab equipment Size: 829 KB

Languages: English

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Frequently Answers and Questions

What are the improvements made to the CRS to comply with US10 exhaust gas regulations?
The CRS features improvements in combustion and post-processing. Combustion improvements include increased system pressure, a supply pump operating at 200 MPa, a high-pressure rail, and G3 type injectors. Post-processing improvements include a Diesel Particulate Filter (DPF) for PM reduction and urea Selective Catalytic Reduction (SCR) for NOx reduction.
What is the purpose of the positive pressure filter use in the CRS?
Positive pressure filter use stabilizes the fuel supply, suppresses filter clogs, increases filter life, and reduces diagnostic abnormalities caused by pressure fluctuations. It achieves these effects by sending fuel from the feed pump to the main filter, applying positive pressure to the fuel filter.
What are the key features of the G3 type injectors used in the CRS?
The G3 type injectors are designed to support a system pressure of 200 MPa, improve responsiveness, and increase resistance against foreign material adherence to the nozzle.
How does the PM regeneration process work in the CRS?
PM regeneration is conducted automatically or manually. In automatic mode, the system determines when a set quantity of PM accumulates in the DPF. In manual mode, the user presses the exhaust gas purification device switch to start regeneration. The regeneration process includes after-injection and fuel addition valve injection to raise the catalyst temperature and then initiate full-scale regeneration.
How does the urea SCR system work to reduce NOx emissions?
Urea SCR adds an aqueous urea solution to the exhaust gas. The solution undergoes hydrolysis, producing ammonia. This ammonia, in turn, reacts with NOx in the SCR catalyst, converting it to nitrogen and water.

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