Yanmar 4TNV98 Engine

Overview of the Yanmar 4TNV98 Engine for Excavators

Direct Injection Technology in the Yanmar 4TNV98 Engine

The Yanmar 4TNV98 Engine is a vertical, multi-cylinder diesel engine with a water-cooled system using a radiator. It employs direct injection (DI) technology for optimal performance. Smaller models may utilize indirect injection (IDI), but the 4TNV98 is known for its advanced direct injection, enhancing fuel efficiency and power.

Advanced Fuel Injection Equipment in the Yanmar 4TNV98 Diesel Engine

The Yanmar 4TNV98 Engine features mechanical fuel injection with a new in-line pump developed for smaller TNV series engines. This pump is fine-tuned at Yanmar’s factory, ensuring high-quality standards. Benefits include:

• Enhanced fuel control with increased force from the governor for stable engine revolutions.
• Optimized fuel injection timing according to engine load, resulting in reduced emissions.
• Precisely controlled injection rates to minimize exhaust emissions, thanks to tailored cam profiles and nozzle designs.

Enhanced Combustion Chamber

It has refined the combustion chambers in the 4TNV98 Engine, focusing on superior air and fuel mixing. Extensive analysis and testing have led to better air-fuel flow dynamics. This leads to efficient combustion and reduced exhaust emissions, ensuring the engine operates smoothly and cleanly.

Multi-Hole Fuel Injection Nozzle Design

The 4TNV98 Engine includes fuel injection nozzles with multiple, finely rounded holes. These ensure even fuel atomization and low-resistance flow. The low sack nozzle profile enhances combustion and mitigates cavitation. This advanced design improves combustion efficiency and reduces engine noise.

Innovative Nozzle Installation Angle in Yanmar 4TNV98 Engines

Yanmar has increased the fuel injection nozzle installation angle in the 4TNV98 Engine compared to older models. This greater angle promotes uniform fuel atomization, contributing to better combustion, easier engine starts, lower noise, and reduced exhaust emissions.

New MP Pump and Emission Reduction

The Yanmar 4TNV98 Engine incorporates the advanced MP pump to achieve further emission reductions. This pump boasts:

• High injection pressure.
• Mono plunger design, ensuring consistent injection between cylinders.
• A Timing Control Device that optimizes injection based on speed and load.
• A mechanical governor that maintains cleaner exhaust.
• A constant pressure valve that reduces RPM variations at low speeds.

Noise Reduction Features

Yanmar applies Computer-Aided Engineering (CAE) to the 4TNV98 Engine’s cylinder block for noise reduction. This increases the block’s stiffness, reduces deformation, and cuts down radiant noise, resulting in quieter operations. Muffler designs also benefit from CAE techniques, using sound-isolating materials to minimize noise levels.

The Yanmar 4TNV98 Engine’s engineering advancements make it a reliable, efficient, and eco-friendly option for excavators, delivering high performance with minimal environmental impact. Contact us to place an order today.