The D15B was an engine produced by Honda for a number of its models, including the Civic, during the 1980s and early 1990s. While not particularly powerful, it was reliable and capable of achieving high rpm without significant structural damage. As of 2010, it is still available in used cars.
The D15B uses a single overhead camshaft to open and close the valves. This camshaft is connected to the crankshaft; as the crankshaft turns, it moves the camshaft, which opens or closes the intake and exhaust valves (one, then the other). The valves aren't completely connected to the camshaft, though. The D15B also has a VTEC system, which is an electronic system that opens or closes the valves in accordance with their needs, rather than just opening them all the way, all the time, which is less efficient at lower rpm.
The D15B displaces just under 1,500 cc of air and fuel. This makes it capable of 130 horsepower at 6,800 rpm, and 100 ft-lbs of torque at 5,200 rpm. This means that one firing of the engine at 5,200 rpm can move a 100-lb. object one foot or a 1-lb. object 100 feet.
The D15B's four cylinders are 75 mm in diameter and 85 mm long. They are capable of compressing fuel and air to 9.6 times its original density, or 1/9.6 of its original volume.
