How does a dual overhead cam work?
A DOHC, four valves per cylinder configuration allows better airflow at high engine speeds, resulting in better top end power. DOHC engines also allow the spark plug to be placed right in the middle of the combustion chamber which in turn promotes efficient combustion.
Is dual overhead cam better?
Dual overhead cam engines are found in most modern vehicles today. They allow better airflow with less obstruction and are generally much more efficient engines than OHV or SOHC engines. Two camshafts operate 4 valves per cylinder, one separate camshaft for intake and exhaust valves.
How much horsepower does a DOHC 16V have?
How Much Horsepower Does A Dohc 16V Engine Have? There are 16 valves to choose from with a DOHC design (double overhead camshaft). A bore of 96 mm and a stroke of 103 mm result from the movement of the threads. When it reached 3400 rpm, it produced 175 horsepower (127 kW), and 260 lbf (352 N*m) of torque.
How does a OHC engine work?
An overhead-cam (OHC) engine needs fewer parts to operate the valves. The cams act directly on bucket tappets or on short levers – known as fingers – which in turn act directly on the valve stems. The system dispenses with the extra weight and mechanical complexity of pushrods and rocker arms.
What is the purpose of a double overhead cam?
Usually, double overhead cams are used on engines with four or more valves per cylinder — a single camshaft simply cannot fit enough cam lobes to actuate all of those valves. The main reason to use double overhead cams is to allow for more intake and exhaust valves.
What drives the cams on a single overhead cam engine?
On single and double overhead cam engines, the cams are driven by the crankshaft, via either a belt or chain called the timing belt or timing chain. These belts and chains need to be replaced or adjusted at regular intervals.
What is a laterally sliding cam?
A mechanism can slide the whole camshaft laterally so that the valve engages different parts of the cam. The shaft still spins just like a regular camshaft — but by gradually sliding the camshaft laterally as the engine speed and load increase, the valve timing can be optimized.
Why do V engines have two cams and inline engines have one?
So inline engines have two cams, and V engines have four. Usually, double overhead cams are used on engines with four or more valves per cylinder — a single camshaft simply cannot fit enough cam lobes to actuate all of those valves. The main reason to use double overhead cams is to allow for more intake and exhaust valves.