The Design and Development of the L-Series Small Air-Cooled Diesel Engine

Yoshihiro Betsuno; Noritoshi Taniguchi; Yoshihiro Sasaki

doi:10.4271/890135

1989-02-01

The Design and Development of the L-Series Small Air-Cooled Diesel Engine 890135

THIS PAPER DESCRIBES THE FEATURES OF THE VERTICAL, SINGLE-CYLINDER AIR-COOLED DIRECT INJECTION DIESEL ENGINE (MODEL L), FOCUSING ON THE TECHNOLOGY USED TO MINIMIZE ITS SIZE AND WEIGHT. THE L-SERIES ENGINES ARE EXTREMELY COMPACT AND LIGHT WEIGHT DIESELS WITH EXCELLENT FUEL ECONOMY AND DURABILITY. THEY ARE USED IN MANY TYPES OF SMALL INDUSTRIAL AND AGRICULTURAL EQUIPMENT FOR WHICH AIR-COOLED GASOLINE ENGINES HAVE HITHERTO BEEN THE NORM.

ONE OF THE MOST NOTABLE DESIGN FEATURES IS THE USE OF DIRECT INJECTION TECHNOLOGY FOR SMALL, HIGH-SPEED ENGINES. THIS NECESSITATED THE USE OF AN ULTRA-SMALL DESIGN FOR THE FUEL INJECTION EQUIPMENT. A SECOND FEATURE IS THE SIDE LID (CRANKCASE) CONSTRUCTION WHICH IS HERE ADOPTED FOR USE IN THE DIESEL ENGINE FOR THE FIRST TIME. THIS HAS BEEN INSTRUMENTAL IN REDUCING THE SIZE, WEIGHT AND PRODUCTION COST. A THIRD FEATURE IS THE RECOIL STARTER UNIT, WHICH IS STANDARD EQUIPMENT. THE STARTER ENSURES EASIER AND CHEAPER OPERATION THAN IS POSSIBLE WITH THE NORMAL HANDLE OR ELECTRIC-STARTER UNIT.

THE ENGINE DESIGN ALSO REDUCES NOISE LEVELS BY 5 TO 6 DB(A) COMPARED WITH CONVENTIONAL DIESEL ENGINES, MAKING THE ENGINE MORE PLEASANT TO USE.

SAE MOBILUS

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

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

The Design and Development of the L-Series Small Air-Cooled Diesel Engine 890135

SAE MOBILUS