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What is NPS?
What is NPS about?
How NPS works compared to standard and race engines
Operating Principles of NPS
Basic description of parts and processes that work together to produce NPS
Combination of parts and processes that work together to produce NPS
HTCSI combustion compared to HCCI combustion
Working prototype engines
Negative pressure produces the SAME force as positive pressure
Vacuum or boost is the result of high pressure forcing itself into low pressure environment
How internal combustion engines and superchargers actually work

Modified Cylinder Heads

NEW specs and features applied to conventional cylinder heads help...
Trap the higher vacuum in the cylinder
Pull a larger intake charge into the engine

headsNegative Pressure Supercharging uses conventional cylinder heads that are modified with a combination of special and conventional specs. This helps trap the higher vacuum produced by the NPS headers in the cylinder and helps pull a larger intake charge into the engine.

For example,

To help trap the higher vacuum in the cylinder and prevent it from pulling the intake charge into the exhaust system the heads use...
Small exhaust valves
Small exhaust ports
Low exhaust valve lift
Low exhaust flow
Special pocket porting
Special valve and seat angles

To help pull a larger intake charge into the engine with the higher vacuum the heads use...
Large intake valves
Large intake ports
High intake valve lift
High intake flow
Conventional race pocket porting
Conventional race valve and seat angles

To optimise oil control with the higher vacuum the heads use...
Special intake positive valve stem seals to prevent an excessive amount of oil being pulled past the valve stem guides into the cylinder
Conventional exhaust positive valve stem seals to prevent oil being pulled past the valve stem guides into the exhaust system

Impulse Engine Technology P/L

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Ph: (02) 9398 5544
Fax: (02) 9398 5644

International: Ph: +(612) 9398 5544
Fax: +(612) 9398 5644

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Inventor of Negative Pressure Supercharging

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