In an ignition device having high voltage wiring, the ignition device which prevents and/or suppresses the occurrence of serious damage due to an electric shock is provided. In the ignition device which includes: an ignition plug that generates a plasma discharge; a DC/AC conversion device that outputs AC power toward the ignition plug; a DC power supply device which is arranged in a different package from that of the DC/AC conversion device and outputs DC power to the DC/AC conversion device via wiring; and a power circuit breaker that conducts and/or interrupts the output of said DC power supply device, the power circuit breaker interrupts the output of the DC power supply device at least once between ignition operation and ignition operation.

In an ignition device having high voltage wiring, the ignition device which prevents and/or suppresses the occurrence of serious damage due to an electric shock is provided. In the ignition device which includes: an ignition plug that generates a plasma discharge; a DC/AC conversion device that outputs AC power toward the ignition plug; a DC power supply device which is arranged in a different package from that of the DC/AC conversion device and outputs DC power to the DC/AC conversion device via wiring; and a power circuit breaker that conducts and/or interrupts the output of said DC power supply device, the power circuit breaker interrupts the output of the DC power supply device at least once between ignition operation and ignition operation.

A kill switch assembly for an internal combustion engine may include a housing, a first terminal carried by the housing and connected to a ground wire, a second terminal carried by the housing and connected to an engine microcontroller communication wire, and a kill switch. The kill switch may be carried by the housing, electrically connected to the first and second terminals, and manually operable by an operator to change the state of the electric switch to provide an engine stop signal to the engine microcontroller. The assembly may also include an electronic circuit carried by the housing, connected to the first and second terminals, and through the wires communicating with the engine microcontroller.

A multi-function key system and method is provided that includes key identification system, a first key, and a second key. The multi-function key system is in communication with an item of power equipment, and comprises first and second sensors for detecting magnetic fields. The first key is configured to interact with the key identification system, the first key comprises a first magnet generating a first magnetic field. The second key is configured to interact with the key identification system. The second key comprises a second magnet generating a second magnetic field. Wherein the first and second sensors differentiate between the first and second key based upon the first and second magnetic fields. The key identification system initiates a first functionality of the power equipment responsive to identifying the first key, and initiates a second functionality of the power equipment responsive to identifying the second key.

A multi-function key system and method is provided that includes key identification system, a first key, and a second key. The multi-function key system is in communication with an item of power equipment, and comprises first and second sensors for detecting magnetic fields. The first key is configured to interact with the key identification system, the first key comprises a first magnet generating a first magnetic field. The second key is configured to interact with the key identification system. The second key comprises a second magnet generating a second magnetic field. Wherein the first and second sensors differentiate between the first and second key based upon the first and second magnetic fields. The key identification system initiates a first functionality of the power equipment responsive to identifying the first key, and initiates a second functionality of the power equipment responsive to identifying the second key.

The ignition control device includes a spark plug that includes a first electrode and a second electrode disposed so as to oppose each other, an ignition coil that includes a plurality of sets of a primary coil and a secondary coil, generates a high voltage in the secondary coil by energizing or interrupting a primary current supplied to the primary coil, and applies the generated high voltage to the first electrode, and a control unit that, in a case where a plurality of the primary coils are driven during a single ignition process, temporarily stops energization of a primary current supplied to a second primary coil when a primary current supplied to a first primary coil is interrupted, and re-energizes the primary current supplied to the second primary coil following the elapse of an energization stoppage period.

An ignition system for an internal combustion engine that utilizes a single primary coil and a single secondary coil to drive a pair of spark plugs. Current flowing in both a first direction and a second direction passes through the primary coil. The current flowing through the primary coil induces corresponding current in the secondary coil, which flows from the secondary coil to one of two spark plugs. Each spark plug is coupled to the secondary coil such that each of the two spark plugs receives current flowing only in a single direction. The current flowing through the ignition system can be from either a power source or created by the rotation of a flywheel having a series of magnet clusters.

A handheld engine-driven working machine comprises an internal combustion engine and an ignition control device; wherein the ignition control device can switch its control between a normal mode and a operation mode, wherein during the operation mode, the ignition timing within the high speed range is maintained at a second BTDC angle, and the ignition timing within the medium speed range is advanced more than a third BTDC angle between a first BTDC angle and the second BTDC angle, and wherein at any rotational speed within the medium speed range, the ignition timing during the operation mode is advanced more than the ignition timing during the normal mode.

A handheld engine-driven working machine comprises an internal combustion engine and an ignition control device; wherein the ignition control device can switch its control between a normal mode and a operation mode, wherein during the operation mode, the ignition timing within the high speed range is maintained at a second BTDC angle, and the ignition timing within the medium speed range is advanced more than a third BTDC angle between a first BTDC angle and the second BTDC angle, and wherein at any rotational speed within the medium speed range, the ignition timing during the operation mode is advanced more than the ignition timing during the normal mode.

In an ignition device having high voltage wiring, the ignition device which prevents and/or suppresses the occurrence of serious damage due to an electric shock is provided. In the ignition device which includes: an ignition plug that generates a plasma discharge; a DC/AC conversion device that outputs AC power toward the ignition plug; a DC power supply device which is arranged in a different package from that of the DC/AC conversion device and outputs DC power to the DC/AC conversion device via wiring; and a power circuit breaker that conducts and/or interrupts the output of said DC power supply device, the power circuit breaker interrupts the output of the DC power supply device at least once between ignition operation and ignition operation.