Dual spark plug ignition system for motorcycle internal combustion engine

Patent · Tue Apr 02 04:00:00 EST 1991

OSTI ID:5716746

Hoeptner, H W

This patent describes an ignition system for a motorcycle two cylinder internal combustion engine, the system including magnetically coupled primary and secondary coil means, two spark plugs at each of the cylinders, a source of electrical current, and a single set of contacts controlling electrical current flow to the primary coil means for producing high voltage outputs from the secondary coil means to be delivered to all four of the spark plugs, the secondary coil means including certain secondary coil means operatively connected via the primary coil means with both the of spark plugs at one cylinder, a single cam controlling only the contacts, and a single magnetic core between the primary coil means and both the secondary coil means, and wherein the spark plugs include: two plugs at one cylinder and connected with the certain secondary coil means, two plugs at the second cylinder and connected with the other secondary coil means, the primary coil means including certain primary coil means magnetically coupled to the certain secondary coil means, and other primary coil means magnetically coupled to the other secondary coil means, the certain and other primary coil means being connected in series, electrically, the two spark plugs at one cylinder being electrically connected to opposite ends of the certain secondary coil means, and the two spark plugs at the other cylinder are electrically connected to opposite ends of the other secondary coil means. It comprises the cam driven by the engine for controlling opening of the contacts, the cam rotatable about a first axis, carrier means carrying the contacts, and adjustably rotatable about the axis.

• Assignee: Custom Chrome, Inc., Morgan Hill, CA (United States)
• Patent Number(s): US 5003945; A
• Application Number: PPN: US 7-413337
• OSTI ID: 5716746
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
DESIGN
ELECTRIC CONTACTS
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MOTORCYCLES
SPARK IGNITION ENGINES
VEHICLES