Introduction; The Engine - Volvo Penta TAMD71B Instruction Manual

3 Introduction

3.1 The engine

TAMD71B(RC)
The engine is an in-line six cylinder, direct injection four-stroke engine. It is equipped with a turbo-
charger, charge air cooler (CAC) and heat exchanger for thermostat regulated freshwater cooling.
Emergency engines are equipped with radiator cooling (RC).
The charge air cooler (CAC), which is water-cooled, lowers the temperature of the inlet air to the en-
gine after compression in the turbocharger. This permits high power output while keeping the combus-
tion and exhaust gas temperatures at an appropriate level.
To reduce exhaust emissions when operating at low load, e.g. after (cold-) starting, there is a by-pass
valve which closes the air passage through the charge air cooler (CAC) and instead channels the air
directly into the engine's inlet manifold via the electrical preheating element.
The exhaust manifold and turbocharger are freshwater-cooled to reduce the radiant heat to the engine
compartment.
For a more detailed description of the engine, its fuel, lubrication, and cooling systems, etc., see chap.
7-11 "Technical description".
Engine design.
Serial No.
Product No.
Fig. 3.1 TAMD 71B from turboside
TAMD71B
XXXXXXXXXX
868807
AB Volvo Penta / Diesel Engine TAMD71B
Engine designation Product No.
TAMD71B 868807
No. xxxxxxxx / xxxxxx
Serial No. Basic engine No.
9