Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
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Glow Plug: Description and Operation
PURPOSE Positive Temperature Coefficient
(PTC) glow plugs aid in starting when the engine is below normal operating temperature.
OPERATION The glow plugs assist in fuel ignition by preheating air in the combustion chamber. PTC glow plugs change resistance with temperature. This change in resistance is used to determine
glow plug ON time.