Caterpillar 3512 Marine Engines

The Caterpillar 3512B Marine engine is a V-12, four-stroke Diesel propulsion set.

V-12s are built to last

V engines are some of the most sought-after internal combustion engine configurations. Their pistons and cylinders are aligned in two separate planes to a form a V-shape when viewed from the axis of the crankshaft. This configuration reduces overall engine dimensions; length, height and even weight, compared to inline configurations. In the V-12 engine, 12 cylinders are mounted on the crankcase, usually in two planes of six cylinders each. In most cases the cylinders are placed at angles of 60° to each other. All the 12 cylinders drive a common crankshaft.

One major advantage of this alignment is that it eliminates the need for balance shafts; no matter the type of V-angle formed, primary and secondary balance is always perfect. Moreover, in heavy duty machines, this engine can run slower than smaller engines often resulting in prolonged engine life.

Enormous engine displacement

The Marine 3512B has an engine displacement of 51.8L (). Displacement is a measure of the volume of the engine’s cylinders which is also an indicator of the engine’s power and size. The size of the cylinders directly influences the size of explosion inside them and by that determines the power of an engine.

ADEM Technology

ADEM III Controllers are only used on select diesel engines where they act as the main Electronic Control Module (ECM). They are used to control Electronic Unit Projector (EUI) operated engines. The controllers are composed of control software, ADEM III ECM, sensors, fuel injectors, actuators, and an interface to the system. ADEM Controllers play a significant role in bettering control and maintenance of particulate emissions, both transient and steady state. They also greatly improve engine performance compared to the Machine Unit Injector.

ADEM controllers are designed to be; Durable Reliable Self-diagnostic Simple Accurate

Benefits; Droop or isochronous speed control Better fuel injection timing and limiting Adjustable monitoring of critical engine components Rated/idle speed setting Adjustable cool-down timing Programmable ramp rate, speed, and acceleration And remote monitoring/control (optional feature)

Engine mounted instrumentation panel

The panel has; A four-position switch Emergency stop notification lighting Shutdown notification lighting An alarm horn A secondary Electronic Control Module (ECM) active light and a secondary ECM ready light. Graphical display area for digital and/or analog display of; fuel and oil pressure and filter differential; system Direct Current voltage, air inlet restriction, fuel consumption, service meter, and water and exhaust temperature.

The Cat 3512 Marine Engine Series Provides Lower Emissions with More Power

The Cat 3512B marine propulsion engine has ratings for commercial marine applications that meet IMO I Regulations but is not compliant with current US EPA regulations. The 3512C marine propulsion engine has ratings for commercial marine applications that meet IMO II and EU Stage IIIA Regulations but are also not compliant with current US EPA emissions regulations.

 

Specs

Bore - mm (in)	170.0 (6.69)
Stroke - mm (in)	190, 215 (7.48, 8.46)
Rated Speed	1200, 1600, 1800 rpm
Aspiration	Twin Turbocharged-Aftercooled
Governor	Electronic
Cooling System	Heat Exchanger or Keel Cooled
Rotation (from flywheel end)	Clockwise or Counterclockwise
Length-mm (in)	2564.6-2645.4 (101.0-104.2)
Width-mm (in)	2036.9-2142.1 (80.3-84.4)
Height-mm (in)	1947.4-2134.1 (76.7-84.1)

 

 

Marine Propulsion Ratings

[avia_table]

MODEL	RATING	RPM	POWER (bhp)	POWER (kW)
3512C-HD	A/B/C	1600	1810/1911/2012	1350/1425/1500
3512C	A/B/C	1800	1500/1575/1650	1120/1175/1230
3512C-HD	B/C/D	1800	2250/2365/2550	1678/1765/1901

 

Downloadable Documents

 

 

Additional Images