Denso HP4 Pump Bushing

1.Product Introduction

The Denso HP4 pump bushing is a critical component within the high-pressure fuel pump system, specifically in the HP4 series of fuel pumps by Denso. The bushing is typically used to support and align rotating parts of the pump, providing a smooth interface for the movement of components that are subject to high friction and pressure during operation.

Main Functions of the HP4 Pump Bushing:

1. Support for Rotating Components:

   • The bushing helps support and align components such as the camshaft, rotor, or other moving parts inside the fuel pump. These components rotate at high speeds, and the bushing ensures they stay properly aligned, reducing wear and tear and ensuring smooth operation.

2. Reducing Friction:

   • The bushing serves as a bearing surface between moving parts, helping to reduce friction and wear. In high-pressure systems like the HP4 pump, reducing friction is crucial for maintaining long-term durability and efficient performance.

3. Maintaining Proper Clearances:

   • The bushing ensures that there are proper clearances between parts within the pump. This is essential for maintaining the pump’s ability to generate the high pressure required for fuel injection. If the clearances are not maintained, it can lead to issues like reduced pump efficiency, poor fuel delivery, or even damage to other components.

4. Preventing Metal-to-Metal Contact:

   • By acting as a cushioning or protective layer, the bushing prevents direct metal-to-metal contact between moving parts, which can lead to premature wear or failure of key components inside the fuel pump.

Types of Bushings in HP4 Pumps:

In the context of the Denso HP4, the bushings are usually made from high-performance materials designed to withstand high pressure, temperature fluctuations, and wear. They might be made of:

• Bronze or steel for durability.
• Composite materials or ceramics for high heat resistance and reduced friction.

Importance in HP4 Fuel Pump Performance:

• The bushing’s role is vital for ensuring the HP4 pump operates smoothly and efficiently. If the bushing wears out or becomes damaged, it could result in a variety of issues like:
  • Increased friction leading to higher wear rates.
  • Misalignment of moving parts, affecting fuel injection timing and pressure.
  • Potential damage to other critical components within the pump, such as the camshaft or rotor.

2.Product Model List

No.	Model
1	294170-5000
2	294170-5010
3	294170-5011
4	294170-5020
5	294170-5030