An injector-igniter assembly includes a passive prechamber and a fuel injector. In an internal combustion engine, fuel is directly injected into a combustion chamber to mix with air in the combustion chamber. Embodiments enable filing the prechamber at different air-fuel-ratio than the main chamber without directly filling the prechamber with fuel. The prechamber has jet apertures in fluid communication with the combustion chamber. In operation, fuel is injected directly into the combustion chamber though nozzles to form a cloud adjacent to openings into the prechamber. Subsequently, mixed fuel and air is ingested into the prechamber from the combustion chamber and ignited. The degree of mixing prior to ingestion into the prechamber can be controlled using different nozzles configurations. Ignited gaseous fuel and air is expelled from the prechamber through the jet apertures and into the combustion chamber as a flaming jet with a core of gaseous fuel.

Embodiments of the present technology relate to a temperature controllable and variable spark plug, and method of use. An example thermally controlled ignition device may comprise at least one sensor communicatively coupled to a control module for determining whether an engine characteristic is within a desired operating range and at least one heating element for adjusting the temperature of the ignition device.

A method for controlling starting of a Liquefied Petroleum Injection (LPI) engine of a mild hybrid electric vehicle includes driving a fuel pump when a first node of an ignition switch is selected, performing an engine cranking operation by driving a Mild Hybrid Starter & Generator (MHSG) when a second node of the ignition switch is selected, determining whether a cranking completion condition is satisfied while performing the engine cranking operation, comparing a pressure of a Liquefied Petroleum Gas (LPG) fuel with a target pressure, and controlling the MHSG to generate a torque corresponding to an idle torque of the LPI engine when the pressure of the LPG fuel is less than the target pressure.

An engine includes a cylinder having an internal combustion chamber and extending longitudinally, a cylinder head coupled to the cylinder, and a fuel-fed pre-chamber positioned within a portion of the cylinder head. The pre-chamber includes a pre-chamber volume and plurality of nozzle holes extending from the pre-chamber volume. The engine also includes an ignition source positioned longitudinally above the pre-chamber volume and a locating member positioned on at least one of the pre-chamber and the cylinder head. The locating member is configured to position the pre-chamber in a predetermined orientation within the cylinder head.

In an internal combustion engine, gaseous fuel is injected in a first injection through a pre-combustion chamber into the combustion chamber to mix with air in the combustion chamber. The pre-combustion chamber has a jet aperture in fluid communication between the pre-combustion chamber and the combustion chamber. Mixed gaseous fuel and air is then ingested into the pre-combustion chamber from the combustion chamber and ignited. In a second injection, injecting gaseous fuel into the pre-combustion chamber and expelling, with the second injection, ignited gaseous fuel and air from the pre-combustion chamber through the jet aperture and into the combustion chamber as a flaming jet with a core of gaseous fuel.

An injector-igniter assembly includes a passive prechamber and a fuel injector. In an internal combustion engine, fuel is directly injected into a combustion chamber to mix with air in the combustion chamber. Embodiments enable filing the prechamber at different air-fuel-ratio than the main chamber without directly filling the prechamber with fuel. The prechamber has jet apertures in fluid communication with the combustion chamber. In operation, fuel is injected directly into the combustion chamber though nozzles to form a cloud adjacent to openings into the prechamber. Subsequently, mixed fuel and air is ingested into the prechamber from the combustion chamber and ignited. The degree of mixing prior to ingestion into the prechamber can be controlled using different nozzles configurations. Ignited gaseous fuel and air is expelled from the prechamber through the jet apertures and into the combustion chamber as a flaming jet with a core of gaseous fuel.

A spark plug for a stationary, gas-powered internal combustion engine, having a metallic body, an insulator mounted in a passage of the body, a center electrode passing through the insulator, a ground electrode mounted on the body that, together with the center electrode, forms a spark air gap, and a cap attached to the body. The cap shields the center and ground electrodes from the combustion chamber after the spark plug is installed in a combustion chamber of the internal combustion engine, and that, together with the body of the spark plug, forms a prechamber in which the center and ground electrodes are located. The cap has at least one opening that permits gas exchange between the prechamber and the space outside of the prechamber. A sensor receiving space is provided in the body of the spark plug, which space opens into the prechamber and serves to receive a pressure sensor in a replaceable manner, and a connecting channel for routing a connecting line of the pressure sensor leads from the sensor receiving space to the end of the body opposite the cap.

A control system for a spark-ignition internal combustion engine configured to produce tumble flow in a cylinder is provided. The spark-ignition internal combustion engine includes an ignition plug configured to ignite an air-fuel mixture in the cylinder. The control system includes a tumble flow rate controller configured to change a position of a vortex center of the tumble flow as viewed in a direction of a center axis of the cylinder, so as to control a flow rate of the tumble flow around the ignition plug at the ignition timing of the ignition plug.

A standby generator includes an alternator to produce electricity for distribution to an electrical system, and an air-cooled internal combustion engine driving the alternator. The air-cooled internal combustion engine includes one or more cylinders, one or more spark plugs each configured to initiate combustion in a corresponding cylinder, and one or more ignition coils each coupled to a respective spark plug of the one or more spark plugs to provide a voltage to the respective spark plug. The standby generator also includes a battery system electrically coupled to the one or more ignition coils to provide power thereto, and a digital ignition module wiring the battery system to each of the one or more ignition coils to control operation of the one or more spark plugs.

An ignition system including an injection member configured to deliver fuel to an ignition zone within a combustion chamber, an ignition element configured to ignite fuel within the ignition zone, and a control unit configured to operate the injection member and the ignition element in a first ignition phase including ignition of a first delivery of fuel provided to the combustion chamber by the injection member and a second ignition phase including ignition of a second delivery of fuel provided to the combustion chamber by the injection member.