Marine Commercial - Information

1. Key Features

Fuel Efficiency

• Leveraging advanced 3D simulations, combustion variables have been optimized
• Equipped with a high-pressure Miller cycle system that employs both a Miller-type camshaft^* and a supercharger^* that allows for high-pressure ratios, this system delivers reductions in NOx and CO₂ emissions, in addition to greater fuel efficiency

Durability Enhancements

• Pistons are constructed of two segments, employing alloy steel for the upper segment that is in direct contact during the combustion process
• The outer circumference of the piston ring contains a CPC coating, enhancing abrasion resistance and reducing seizures
• Yanmar's innovative processing for the inner surface of the cylinder liner improves oil retention, thereby reducing friction
• The exhaust valves employ a new alloy material that enhances abrasion resistance and durability

More Power

• The piston stroke length for the auxiliary engines has been increased from 380mm on previous models to 440mm
• The rated speed for the propulsion engines has been increased from 620min^-1 on previous models to 750min^-1
• Structural analysis has been performed on each part, with construction of the main parts and key moving parts optimized

2. EY33 Series Specifications

Note: Propulsion engine: The engine for propelling the vessel. Auxiliary engine: The engine for powering the generators for electricity on the vessel

• ※1:A camshaft which has a design that allows for rapid closing of the intake valves
• ※2:Due to the rapid closing of the intake valves, this device pushes highly pressurized air through the cylinders, thereby offsetting pressure reductions inside of them
• ※2:A technology that applies aluminum to mitigate tiny cracks that arise in hard chrome plating

About Yanmar

With beginnings in Osaka, Japan in 1912, Yanmar was the first ever to succeed in making a compact diesel engine of a practical size in 1933. Moving on, with industrial diesel engines as the cornerstone of the enterprise, Yanmar has continued to expand its product range, services, and expertise to deliver total solutions as an industrial equipment manufacturer. As a provider of small and large-size engines, ag machines and facilities, construction equipment, energy systems, marine, machine tools, and components — Yanmar’s global business operations span seven domains.

On land, out at sea, and in the midst of the city, Yanmar’s Mission of “providing sustainable solutions focused on the challenges customers face, in food production and harnessing power, thereby enriching people’s lives for all our tomorrows,” stands testament to Yanmar’s determination in providing us with “a sustainable future.” For more information, visit Yanmar Co., Ltd. at its worldwide website at https://www.yanmar.com/global/about/.