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Summary of Contents for Volvo 850 GLT
- Page 1 Technical information Engine...
- Page 2 Volvo 850 Engine Introduction The demands on the car of the 90's are makes it necessary to study man- very high in every respect. As vehicle machine interactions when developing manufacturer one can no longer con- a new car. centrate only on a subset of all prop-...
- Page 3 Volvo 400-series and fore the best ignition timing has not was on space, packaging and handling only been determined by emissions, grounds also chosen for the Volvo 850 fuel consumption, performance and GLT. driveability but also by its effect on The development of the new engine noise and vibrations.
- Page 4 The Volvo 850 engine concept The engine in the Volvo 850 GLT is to inherent engine and transmission ri- good working condition. an in-line 2.5 litre five-cylinder called gidity, damped engine and suspension Regarding high energy efficiency, the the B5254F. Thanks to an extremely...
- Page 5 Vol- vo Skovde plant. This new plant is part of the investments carried out by Volvo for the 90's and which also in- clude the complete Volvo 850 car. A large number of the components...
- Page 6 Cylinder block and lower risk for ovality in the cylinders as a enous material. The combustion crankcase result of thermal expansion. chambers is of the pent-roof type with Figure 5 four valves per cylinder. The valves The lower crankcase has re- inforcements of cast nodular iron in are set at a relative angle of 58 de- the main bearing caps.
- Page 7 Crankshaft Camshaft drive Figure 10 Connecting rods and Figure 8 pistons Camshafts and water pump are driven Figure 9 by the vibration damper hub on the crankshaft by a toothed belt. For op- The connecting rods are forged from timal engine performance it is nec- vandium alloy steel with an effective essary to ensure extreme accuracy in length of 139.5 mm.
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Page 8: Lubrication System
Auxiliary drive and Lubrication system Cooling system installation Figure 12 The oil is circulated by a rotor oil The water pump is designed to meet pump of the crescent-type and has a high demands for reliability and com- Auxiliary units such as alternator, maximum capacity of 70 litres per pactness. - Page 9 Air inlet system (Volvo Variable Induction System). V- VIS consists of a conventional plenum Inlet air is taken ahead of the radiator chamber with twin inlet ducts to each and passes through the air filter and air cylinder, parallel but of different mass meter of hot-fim type.
- Page 10 With closed control valves a negative wave, caused by the descending piston and the inertia of the gas in the longer duct, accelerates the air column in the duct. At resonance rpm the inertia causes the air to ram into the cylinder just before the inlet valve closes.
- Page 11 Max output for the B5254F is 170 hp (125 kW) at 6000 rpm. Max torque is 220 Nm at 3300 rpm. Thanks to the V-VIS system, 90 per cent of the maximum torque is available between 2000 and 6000 rpm. Exhaust system Figure 18 haust system by a flexible joint and...
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Page 12: Fuel Injection System
It has a closed-loop lamb- by a broken fuel pipe and a running in the current four-cylinder Volvo da control and an idle speed control, fuel pump after a crash. - Page 13 (figure 20). This gives an engine mounting system. The mount- excellent insulation of engine vibra- The firing order of the B5254F is ing system for the Volvo 850 has tions. 1-2-4-5-3, with even firing interval of been designed on the following The main mounts and the torque 144 crank degrees.
- Page 14 The manufacturing process, based on meet the high demands on engines in extremely high demands for accuracy a car, typified by the Volvo 850 GLT and quality to guaranteed engine re- by using modern CAE technology. liability, is particularly cost-effective...
- Page 15 Volvo 850 GLT Engine specifications Type: Transverse 5-cylinder in-line DOHC all-aluminium V-VIS Volvo Variable Induction System Displacement: 2435 cc Bore x stroke: 83 x 90 mm 10.5:1 Valves: 4 per cylinder, angled at 58 degrees Max output; 170 hp (125 kW) at 6000 rpm...
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