MAN Engines is now providing pre-chamber spark plugs tailored to the respective combustion chamber to all turbocharged pure fuel engines of the present MAN E3262, E3268, E0836 and E0834 sequence as an choice, in addition to MAN E3872 as compulsory.
As a result of backward compatibility, present mixed warmth and energy crops (CHP) with the aforementioned twelve, eight, six and four-cylinder engines will also be retrofitted with pre-chamber spark plugs utilizing the lean combustion course of. This consists of operation with hydrogen-containing fuels with as much as 20% hydrogen admixture.
A conversion of the engines shouldn’t be essential for using pre-chamber spark plugs. As a result of software program adjustment of the ignition timing and the discount of the vitality requirement, much less highly effective ignition management items could also be essential.
The pre-chamber spark plugs are accepted for operation at each 500 mg/Nm3 NOx and 250 mg/Nm3 (at 5% O2), which complies with the forty fourth Ordinance on the Implementation of the Federal Immission Management Act (BImSchV) in Germany.
With the approval of our turbocharged pure fuel engines for using pre-chamber spark plugs, we’re providing our prospects greater effectivity and decrease upkeep necessities as added worth.
—Reiner Roessner, Head of Gross sales MAN Engines
View into the combustion chamber of a turbocharged fuel engine with a pre-chamber spark plug: In distinction to a traditional spark plug, which ignites the fuel-air combination instantly within the combustion chamber, the combination of the pre-chamber spark plug is first ignited within the pre-chamber from which the high-energy flame jets penetrate into the combustion chamber.
Particularly in low-NOx purposes, the pre-chamber spark plug provides some important benefits over the traditional spark plug. One clear benefit of pre-chamber spark plugs is their longer service life, which is influenced, amongst different issues, by the decrease ignition vitality.
Our measurements have proven that we will multiply the service life in low-NOx purposes with pre-chamber spark plugs. This can be a particular plus when it comes to lowering upkeep prices.
—Werner Kübler, Head of Engineering at MAN Engines
As well as, MAN engines with pre-chamber spark plugs supply higher combustion high quality: the pre-chamber spark plug is provided with radially organized holes, which gives a connection to the principle combustion chamber. Throughout the piston upward motion in the course of the compression part, the gas-air combination enters the pre-chamber by way of the holes, the place it’s ignited. As a result of structural and structural design, the gasoline gas-air combination in the principle combustion chamber could be higher ignited by the escaping high-energy flame jets of the pre-chamber and thus lean mixtures could be safely ignited. The optimum ignition within the prechamber is realized by a number of ignition sources organized in a star form.
With pre-chamber spark plugs, we will enhance the effectivity of a system by as much as one share level.
—Werner Kübler
One other benefit of pre-chamber spark plugs is their higher flexibility when it comes to ignition circumstances. The pre-chamber spark plug can management the ignition of the fuel-air combination higher than a traditional hook spark plug, thus guaranteeing elevated smoothness and smoothness.