Investigation of Combustion Characteristics, Physical and Chemical Ignition Delay of Methanol Fuel in a Heavy-Duty Turbo-Charged Compression Ignition Engine

Chen, Chong; Cordtz, Rasmus Faurskov; Pedersen, Troels Dyhr; Winther, Kim; Førby, Niels Langballe; Schramm, Jesper

doi:10.2139/ssrn.4313214

Cited by 1 publication

(1 citation statement)

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“…Furthermore, they observed that increasing concentrations of CEN altered the combustion process from solely premixed, characterized by a long ignition delay and short combustion duration, to a combination of premixed and diffusion combustion, characterized by a shorter ignition delay and longer combustion duration. Cheng et al [79] observed the same phenomena on a larger five-cylinder 9.4 L engine when testing different amounts of ignition improver and varied ignition timing. Their results showed that when varying the injection timing with 5% ignition improver, the combustion characteristics were more similar to that of partially premixed combustion (PPC), and the use of 3.5% ignition improver gave a pronounced premixed combustion process.…”

Section: Ignition Improvermentioning

confidence: 62%

Renewable Methanol as a Fuel for Heavy-Duty Engines: A Review of Technologies Enabling Single-Fuel Solutions

Pu,

Dejaegere,

Svensson

et al. 2024

Energies

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To meet climate targets, a global shift away from fossil fuels is essential. For sectors where electrification is impractical, it is crucial to find sustainable energy carriers. Renewable methanol is widely considered a promising fuel for powering heavy-duty applications like shipping, freight transport, agriculture, and industrial machines due to its various sustainable production methods. While current technological efforts focus mainly on dual-fuel engines in shipping, future progress hinges on single-fuel solutions using renewable methanol to achieve net-zero goals in the heavy-duty sector. This review examines the research status of technologies enabling methanol as the sole fuel for heavy-duty applications. Three main categories emerged from the literature: spark-ignition, compression-ignition, and pre-chamber systems. Each concept’s operational principles and characteristics regarding efficiency, stability, and emissions were analyzed. Spark-ignition concepts are a proven and cost-effective solution with high maturity. However, they face limitations due to knock issues, restricting power output with larger bore sizes. Compression-ignition concepts inherently do not suffer from end-gas autoignition, but encounter challenges related to ignitability due to the low cetane number of methanol. Nonetheless, various methods for achieving autoignition of methanol exist. To obtain stable combustion at all load points, a combination of techniques will be required. Pre-chamber technology, despite its lower maturity, holds promise for extending the knock limit and enhancing efficiency by acting as a distributed ignition source. Furthermore, mixing-controlled pre-chamber concepts show potential for eliminating knock and the associated size and power limitations. The review concludes by comparing each technology and identifying research gaps for future work.

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Section: Ignition Improvermentioning

confidence: 62%