The Intercooler Boost System; Evaporative Control System - Volvo 740 GL Owner's Manual

1985 Volvo 740 GL, GLE, Turbo

The Intercooler Boost System

The B230F-Turbo engine with the Intercooler Boost System employs a turbo-compressor to force air
into the engine inlet manifold and the Intercooler Boost System to cool the compressed inlet air. The
resulting increase in air flow raises pressure in the intake manifold by approx. 8 psi (over atmospheric
pressure) and engine power output by approx. 50 horsepower over that developed by the normally-
aspirated engine.
The intercooler (which resembles a radiator) is located between the turbo-compressor and inlet
manifold.
pg. 97 Servicing

Evaporative control system

The 740 is equipped with a gas-evaporative control system, which prevents gasoline fumes from being
released into the atmosphere.
The system is comprised of an expansion chamber in the fuel tank, a roll-over valve on the cross
member in front of the fuel tank, and a charcoal canister with built-in vacuum valve under the left-front
wheel housing.
The components are interconnected by hoses which channel fuel vapor from the gas tank to the charcoal
filter, where it is stored until the engine is started and then drawn into the engine's fuel-induction system.
file:///K|/ownersdocs/1985/1985_740_GL_GLE_Turbo/85740_07.htm (13 of 22)12/30/2006 7:46:11 AM