Saab Central - Features

The Saab 9000: Form and Function 1987

The Saab 9000 1 (2) 3 4 5 6 7 8 9 10 11

Engine

The Saab 9000 can now be specified with one of two engines— the powerful turbocharged engine or the fuel injection engine. The basic design of the 9000 Turbo 16 and the 9000i 16 engines is the same. Both trace their origins to our time-tested two litre, four cylinder in-line engine with double overhead camshafts and four valves per cylinder. This engine has been designed for extremely high power ratings, so it has the safety margins necessary for exceptional reliability.

The 16 valve engines are built to develop high power with relatively low fuel consumption, offering maximum reliability and minimal service requirements.

The 16 valve engine of the Saab 9000 is one of the world’s most ad vanced automotive power units. The common features of the ‘Turbo and fuel injection engines include four valves per cylinder, double overhead camshafts, maintenance-free hydraulic cam followers, LH Jetronic fuel injection and idling speed governor

The 9000 Turbo 16 is powered by Saab’s third generation turbo-charged engine. In addition to the above technical features, it also in cludes a turbocharger, APC micro processor and intercooler. As a result, the ‘Turbo engine offers high reliability, low fuel consumption, minimal service requirements and enormous power resources—175 horsepower (129 kW) and a peak torque of 273 Nm (201 lb ft. The car has a top speed of more than 135 mph (220 km/h) and it accelerates from rest to 60 mph in 7.8 seconds (up to 100 km/h in 8.3 seconds).

The turbocharging system

The Saab turbocharging system consists of a turbocharger, the APC system and an intercooler. The tur bocharger uses the exhaust gases discharged by the engine to drive a compressor, which boosts the pressure of the combustion air supplied to the engine whenever extra power is required, such as on acceleration.

The exhaust gases flow through the exhaust manifold to the turbo charger, in which two bladed wheels are mounted on a common shaft. One of the wheels—the turbine—is located in the exhaust gas path and is induced to rotate by the exhaust gases flowing through it. When the driver has pressed down the accelerator pedal, the pressure and velocity of the exhaust gases flowing out of the engine increase, and the turbine starts rotating at an increasing speed. The intake air will then be compressed by the other bladed wheel the compressor impeller thereby inducing more air to flow into the combustion chambers. The increased quantity of air also allows more fuel to he supplied. So the engine will develop more power than it does when it draws the fuel ‘air mixture naturally.

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