Browse Publications Technical Papers 2004-32-0034
2004-09-27

Development of Four-stroke Outboard Motor 2004-32-0034

The purpose of this paper is to describe some technical features of a new type 4-stroke outboard motor, the DF250.
This model is a 4-stroke V6 outboard motor, and has the largest displacement 3,614cc and the highest maximum power 250 ps in the marketplace. The model possesses a number of remarkable features of compact engine layout, maximum output power 250 ps, high-flat torque from low to high engine revolution, and low vibration:
  1. 1)
    In order to make the engine compact, the following are adopted: V-bank angle of 55 degrees, twin throttle bodies, offset driveshaft system and two-stage camshaft drive system.
  2. 2)
    The following systems apply to this model to achieve both high output power and high-flat torque:
    • Continuously variable valve timing system (VVT)
    • Variable air intake pipe length system
  3. 3)
    To reduce vibration, the offset driveshaft system is adopted.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

A Study on the Camshaft Lobe Microstructure Obtained by Different Processing

2012-36-0499

View Details

TECHNICAL PAPER

Fuel Injection Effect on In-cylinder Formation and Exhaust Emission of Particulate from a 4-Stroke Engine for 2-Wheel Vehicles

2010-01-0354

View Details

TECHNICAL PAPER

Camshaft-Tappet Problems in Ford Overhead-Valve Engines

560016

View Details

X