1987-11-08

New Four Valves Per Cylinder Basic Engine for Passenger Car 871177

ABSTRACT

Through the experience in developing several 4-valve sporty engines, we have had an idea that 4-valve technology regarded as one of sporty engines may be applied to a standard engine of a passenger car. Making use of the superior characteristics of 4-valve technology, combustion chamber design and valve train system were completely refined for a standard engine. Higher torque in low to middle speed range and good fuel economy, important features in practical use, were pursued as the prior target of development. As a passenger car engine, comfortable sound in passenger compartment is an important feature as well as high performance and good fuel economy. With these concepts, we have developed the 3S-FE, 2-liter, 4-valve engine which has achieved 5.1& torque, 18.6% horse power and 9.7% Fuel consumption (highway mode) gains compared with the original 2S-E, 2-liter, 2-valve engine. A newly developed bending and torsional damper pulley to reduce the engine vibration, realized the quietness and comfort in passenger compartment.

This paper describes the concept of 4-valve technology in a standard engine and the details of the newly developed 3S-FE enigne with these concepts.

SAE MOBILUS

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

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X