Page 37: of Maritime Reporter Magazine (September 1985)

PROPULSION UPDATE

Detroit Diesel Allison Announces

Significant Engineering Advancements

To Its Series 149 Engines

Detroit Diesel Allison (DDA) Di- vision of General Motors has an- nounced significant engineering ad- vancements to its Series 149 engines (now designated "Silver 149s") used extensively in mining, construction, industrial and marine applications.

One technological advancement credited with a 6 to 10 percent improvement in fuel economy is

DDA's air induction system. The primary feature of this system is a blower bypass relief valve located in a special chamber between the in- tercooler and the blower. It operates as follows: 1. At suitable engine speed and load, the bypass valve allows air pressure on the inlet and outlet sides of the blower to equalize. This virtually elimi- nates the pumping load of the blower. 2. The blower continues to turn since it is driven by the gear train of the engine. However, with the pumping load re- moved, the blower is in a free wheeling state. 3. In this state, the blower re- quires minimal horsepower to operate. This savings in fric- tion horsepower translates di- rectly into increased fuel effi- ciency.

Newly-designed and re-engi- neered components are featured on the Silver 149s, representing state- of-the-art diesel technology.

Tube-and-Shell Oil Cooler

Available on 8V- and 16V-149TI engines, the tube-and-shell oil cool- er increases engine life through de- creased oil temperature, improved oil filtration and better oil flow. For each 10 degree F reduction in oil sump temperature, related compo- nentry life is increased by approxi- mately 50 percent. Oil filtration is improved by the addition of two more oil filters which should extend the oil and filter change intervals.

Other advantages of the new tube-and-shell cooler include in- creased oil flow by up to 17 percent; increased oil gallery pressure; re- duced oil system restriction; and cleanable tube bundle.

Crankcase Monitor

This device senses higher-than- normal crankcase pressure resulting from piston blow-by, seal leakage or other detectable malfunctions. The crankcase monitor signals a warning to the operator so that he can shut down the engine immediately and prevent extensive engine damage.

September 1, 1985

Cylinder Kit Components

All Silver 149s use DDA's cross- head piston which features a sepa- rate crown and skirt that work inde- pendently of each other. The crown absorbs combustion forces while the skirt absorbs thrust loads. To in- crease the reliability of the rod-to- pin joint, the piston incorporates a new, one-piece, solid piston pin for greater durability and longer life.

The new oil control ring pack can reduce oil consumption by up to 70 percent. Ring life-to-overhaul of the engine is increased significantly by maintaining uniformity of oil film across the face of the rings.

In addition to these improve- ments, DDA's Silver 149s provide benefits to the user in increased pro- ductivity, excellent performance at

Detroit Diesel Allison's Series 149 en- gines—now designated "Silver 149s"—fea- ture newly designed and re-engineered components representing state-of-the-art diesel technology.

The air induction system of Detroit Diesel

Allison's Silver 149 turbocharged and turbo- charged intercooled engines represents a major breakthrough in air flow technology. high altitudes and upgrading of the engine through a planned retrofit program.

Outstanding performance at high altitudes is available from Detroit

Diesel Silver 149s because turbo- charging and intercooling in the en- gines have a tendency to minimize the effect of less dense air. The tur- bocharger forces more air into the air induction system, and the inter- cooler cools it to make it more dense. The 16V-149TI model shows no horsepower loss up to 10,000 feet and no adjustments to the fuel sys- tem are necessary.

For further literature containing full information,

Circle 15 on Reader Service Card

Free 12-Page Brochure

On Marine Control System

Offered By Forney

The Forney Engineering Compa- ny, Carrollton, Texas, is offering a free, full-color brochure on their new AFS-1000 control system.

The three-hole binder publication offers several color photographs of the AFS-1000 and its components, along with clear, concise explanato- ry text.

According to the brochure, the

AFS-1000 control system has gained wide acceptance in power, process and industrial control applications.

The brochure states that some of the typical applications of the AFS- 1000 are: burner control and mill interlock systems; boiler safety sys- tems; interlocking logic system for plant control applications; bulk ma- terials handling applied to coal, ash and limestone conveying systems; diesel engine control and monitor- ing; plantwide SCADA systems;

FGDS control and monitoring; water treatment control; and emer- gency shutdown systems.

The booklet is broken in to 10 comprehensive sections which in- clude: an introduction; applications; engineering; customer service and training; systems architecture; oper- ator interface; software features; and optional equipment.

An added feature of the brochure is a complete list of Forney Engi- neering representatives, subsidiar- ies and joint ventures located in the

U.S. and around the globe.

To obtain a free copy of the For- ney Engineering Company brochure on their AFS-1000 control system,

Circle 50 on Reader Service Card

Gould Gets $16.9-Million

Navy Contract For Towed

Arrays For Submarines

Gould Defense Systems Inc. of

Glen Burnie, Md., has been awarded a $16,900,000 firm-fixed-price Navy contract for 45 TB-16A/BQ towed arrays for SSN and SSBN subma- rines. Work is expected to be com- pleted by October 1, 1987. Contract funds would not have expired at the end of the current fiscal year. The

Naval Sea Systems Command,

Washington, D.C., is the contracting activity (N00024-85-6161).

THE SHIPYARD DOOR FOR B[G OPENINGS

High Wind Loads For tough environments

Easy to install and maintain

Perfect in blast & paint facilities

Send for complete technical information

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Telephone (201) 391-8525

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Circle 292 on Reader Service Card 1 1