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1997 Alfa Romeo 156 with the 1.6l, 1.8l and 2.0l petrol engines [6] 1998 Alfa Romeo GTV and Spider with the 1.8l and 2.0l petrol engines [7] 2000 Alfa Romeo 147 with the 1.6l and 2.0l petrol engines, [8] except for the model with the 105 bhp engine; 2004 Alfa Romeo GT with the 1.8l and 2.0l petrol engines; 2001 Fiat Stilo with the 1.8l [9] or 2 ...
The timing, duration and lift of these valve events has a significant impact on engine performance. Without variable valve timing or variable valve lift, the valve timing is the same for all engine speeds and conditions, therefore compromises are necessary to achieve the desired result in intake and exhaust efficiency . This has been described ...
Valve timing diagram for a 4-stroke engine. With traditional fixed valve timing, an engine will have a period of "valve overlap" at the end of the exhaust stroke, when both the intake and exhaust valves are open. The intake valve is opened before the exhaust gases have completely left the cylinder, and their considerable velocity assists in ...
In order to improve the optimisation of the valve timing for differing engine speeds and loads, the system is able to vary the timing and duration of the inlet valve opening. It achieves this by using a complex and finely machined mechanism to drive the inlet camshafts.
In contrast, MultiAir uses managed hydraulic fluid to provide variable valve control. Control of a MultiAir engine's intake valves works via a valve tappet (cam follower), moved by a mechanical intake cam, which is connected to the intake valve through a hydraulic chamber, controlled by a normally open on/off solenoid valve. [11] The system ...
For twin-cam or DOHC engines, VCT was used on either the intake or exhaust camshaft. (Engines that have VCT on both camshafts are now designated as Ti-VCT.↓) The use of variable camshaft timing on the exhaust camshaft is for improved emissions, and vehicles with VCT on the exhaust camshaft do not require exhaust gas recirculation (EGR) as retarding the exhaust cam timing achieves the same ...
In some cases, it makes your dough easier to work (think soft, delicate Linzer dough). It prevents your cookies from spreading in the oven.
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