Bosch 0986440561 VE Distributor Injection Pump

The Bosch 0986440561 is a VE-type rotary distributor injection pump designed for diesel engines. This high-precision fuel injection pump is commonly used in Volkswagen TDI applications, including Golf, Jetta, and Beetle models equipped with automatic transmissions. Cross-references with OEM part numbers 038130107J and 038130107JX.

Key Features:

• Rotary distributor design with single plunger that both rotates and reciprocates for precise fuel metering and distribution
• Integrated vane-type fuel supply pump that draws fuel from tank and supplies pressurized fuel to distributor plunger
• Built-in mechanical governor for consistent engine speed control
• Automatic advance timing device that adjusts injection timing based on engine speed and load
• Delivery valve for each cylinder ensures clean fuel cut-off and prevents injector dribble
• Durable construction designed for long service life in compact and automotive diesel engines

The VE-type injection pump operates by using a cam plate with face cams that push the distributor plunger to create high fuel pressure. As the plunger rotates, it distributes pressurized fuel to each cylinder in the correct firing order. The internal vane pump maintains supply pressure between 3-7 bar to lubricate moving parts, supply the distributor plunger, and control the timing advance mechanism. This proven Bosch design offers reliable performance, excellent fuel efficiency, and reduced emissions in diesel applications.