Posted inBasics
Digital engine control
A typical engine control system incorporates a microprocessor and is essentially a special-purpose computer (or…
Posted inBasics
Digital engine control systems
Traditionally, the term powertrain has been thought to include the engine, transmission, differential, and drive…
Posted inBasics
Compression-ratio
In an engine cylinder, the gas molecules are moving about at considerable speed in the…
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Engine cylinder capacity
Engine sizes are compared on the basis of total cylinder swept volume, which is known…
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Engine power
Power is the rate of doing work. When applied to engines, power ratings may be…
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Engine torque
This is the turning-effort about the crankshaft’s axis of rotation and is equal to the…
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Engine-performance terminology
To enable intelligent comparisons to be made between different engines’ ability to pull or operate…
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Crankcase disc-valve and reed-valve inlet charge control
An alternative to the piston-operated crankcase inlet port is to use a disc-valve attached to…
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Reverse-flow (Schnuerle) scavenging
To improve scavenging efficiency, a loop-scavenging system which became known as the reverse-flow or (after…
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Piston-engine cycles of operation
The internal-combustion engine The piston engine is known as an internal-combustion heat-engine. The concept of…