Provided is an ignition system including: a main primary coil; a main IC configured to switch a main primary coil mode between an energization mode and a de-energization mode; a sub primary coil; a sub IC configured to switch a sub primary coil mode between an energization mode and a de-energization mode; a secondary coil; a detection unit configured to detect a state of the main primary coil; and a control unit configured to determine whether a state of a sub primary current path is normal or abnormal based on the state of the main primary coil detected by the detection unit, the sub primary current path being a current path of a sub primary current flowing through the sub primary coil.

Provided is an ignition system including: a main primary coil; a main IC configured to switch a main primary coil mode between an energization mode and a de-energization mode; a sub primary coil; a sub IC configured to switch a sub primary coil mode between an energization mode and a de-energization mode; a secondary coil; a detection unit configured to detect a state of the main primary coil; and a control unit configured to determine whether a state of a sub primary current path is normal or abnormal based on the state of the main primary coil detected by the detection unit, the sub primary current path being a current path of a sub primary current flowing through the sub primary coil.

This ignition coil includes: a bar-shaped resistor electrically connected to a terminal of a coil assembly via a relay; a case for storing these; and a filler filling gaps inside the case. The case includes a body, a cylindrical output portion protruding from the body, and an annular holding portion protruding inward from an inner circumferential surface of the output portion and formed integrally with the output portion. A part of the resistor is inserted into the holding portion, and thus a first internal area located on the body side with respect to the holding portion and shut off from outside is formed in an internal area of the output portion. The filler fills the first internal area.

In at least some implementations, a coupler for a spark plug includes a body formed from an electrically conductive material and including a first connecting portion defining a first cavity, and a second connecting portion defining a second cavity spaced from the first cavity, and the body includes an intermediate portion physically and electrically coupling the first connection portion and the second connecting portion. In at least some implementations, the first connecting portion is formed from a wire coiled to define the first cavity within the coil. In at least some implementations, the second connecting portion is formed from a wire coiled to define the second cavity within the coil.

The present invention relates to a spark plug extension body connecting an ignition coil with a spark plug for a spark ignited internal combustion engine, as well as a method for providing such a spark plug extension body for reduction of partial electrical discharges in the spark plug extension body. In conventional spark plug extensions are coil springs used as electrical conductor against the spark plug terminal and/or ignition coil terminal. These coil springs cause Corona effects and short circuiting requiring replacement of the spark plug extension. With the invention the entire electrical conductor (CR.sub.u, 64, CR.sub.L) is in a rod like form and at least both ends (CR.sub.u, CR.sub.L) of the electrical conductor (CR.sub.u, 64, CR.sub.L) are made as a monolith in a flexible and electrically conducting polymeric material, preferably electrically conducting rubber.

The present invention relates to a spark plug extension body connecting an ignition coil with a spark plug for a spark ignited internal combustion engine, as well as a method for providing such a spark plug extension body for reduction of partial electrical discharges in the spark plug extension body. In conventional spark plug extensions are coil springs used as electrical conductor against the spark plug terminal and/or ignition coil terminal. These coil springs cause Corona effects and short circuiting requiring replacement of the spark plug extension. With the invention the entire electrical conductor (CR.sub.u, 64, CR.sub.L) is in a rod like form and at least both ends (CR.sub.u, CR.sub.L) of the electrical conductor (CR.sub.u, 64, CR.sub.L) are made as a monolith in a flexible and electrically conducting polymeric material, preferably electrically conducting rubber.

An ignition coil for an internal combustion engine includes a primary bobbin including a winding cylinder part and a connection part between the winding cylinder part and a connector part, a primary coil including a primary main coil and a primary sub coil, and a secondary coil. When one of the primary main coil and the primary sub coil that includes an innermost coil part around the winding cylinder part is defined as a firstly-wound coil and the other is defined as a secondly-wound coil, firstly-wound ends, which are ends of the firstly-wound coil, and secondly-wound ends, which are ends of the secondly-wound coil, are attached to the connection part, and a shortest distance from a central axis of the winding cylinder part to each of the firstly-wound ends is smaller than a shortest distance from the central axis of the winding cylinder part to each of the secondly-wound ends.

An ignition coil for an internal combustion engine includes a primary bobbin including a winding cylinder part and a connection part between the winding cylinder part and a connector part, a primary coil including a primary main coil and a primary sub coil, and a secondary coil. When one of the primary main coil and the primary sub coil that includes an innermost coil part around the winding cylinder part is defined as a firstly-wound coil and the other is defined as a secondly-wound coil, firstly-wound ends, which are ends of the firstly-wound coil, and secondly-wound ends, which are ends of the secondly-wound coil, are attached to the connection part, and a shortest distance from a central axis of the winding cylinder part to each of the firstly-wound ends is smaller than a shortest distance from the central axis of the winding cylinder part to each of the secondly-wound ends.

A vehicle predictive control system based on big data includes: a vehicle terminal, which is installed in each of a plurality of vehicles, collecting status information related with an in-vehicle device in a corresponding vehicle to transmit the collected status information in real time, and transmitting problem occurrence information upon problem occurrence of the in-vehicle device; and a big data service provider classifying and storing the status information received from the vehicle terminal as big data, and obtaining a problem occurrence condition based on the status information to transmit information corresponding to the problem occurrence condition to the vehicle terminal when receiving the problem occurrence information of the in-vehicle device from the vehicle terminal of at least some vehicles among the plurality of vehicles.

An ignition coil includes a coil unit, a hollow cylindrical joint, and a spring. The joint couples the coil unit with a spark plug. The spring is inserted into a through-hole in the joint to electrically connect the coil unit and the spark plug together. The joint has electrical insulation and rubber elasticity. The spring includes a spring base section, a spring head section, and a spring intermediate section lying between the spring base and head sections. The joint has an inner peripheral surface placed in direct contact with the spring intermediate section in a radial direction of the joint. The spring intermediate section is wound more densely than each of the spring base section and the spring head section in a condition where the spring is subjected to no load. This structure serves to minimize a risk of generation of a corona discharge in the ignition coil and an ignition device equipped with the ignition coil and improve the productivity thereof.