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Over the last years, automotive industries drove a great amount of research in the field of advanced combustion techniques minimizing carbon dioxide emissions. The so-called Low-Temperature Combustions (LTC), characterized by the self-ignition of highly premixed air-fuel mixtures, represent a promising solution to achieving high efficiency and ultralow emissions of nitrogen oxides (NOx) and particulate matter. Among these, gasoline Partially Premixed Combustion (PPC), obtained through the high-pressure direct injections of gasoline, showed a good potential for the simultaneous reduction of pollutants and emissions in compression ignited engines. However, when multiple injections per cycle are performed (with hydraulic-assisted needle opening), combustion stability might be compromised by the wave effects in the hydraulic system, which produce incoherence between the requested and injected fuel. This work presents a model-based pressure waves reconstruction strategy, based on a control-oriented model of the high-pressure common rail injection system fueled with gasoline. To determine the hydraulic system's behavior during the injection process, a specifically designed flushing bench with a high-frequency acquisition system has been developed. Experimental activities have been carried out to highlight fuel pressure fluctuations with single and double injection patterns. Through the analysis of the acquired data, the key parameters (characteristic of the system) have been identified and the accuracy of pressure waves reconstruction has been evaluated, always returning errors lower than 2% between measured and estimated instantaneous pressures. Different fuel types, injectors, and rail positions have been tested to highlight the robustness of the approach. Based on the instantaneous pressure trace estimated with the control-oriented model, a fuel quantity Fluctuation Correction Strategy (FQC), implementable on a standard engine Electronic Control Unit (ECU), has been developed. The obtained results confirm the potential to reduce fuel quantity oscillations in multiple-injections systems.

Muchos fueron los intelectuales y escritores españoles que llegaron a México a partir de 1939, sin embargo, la producción literaria con temas y motivos mexicanos dentro de su extensa bibliografía no es numerosa. Se explica quizás por su condición de exiliados que determinó una escritura que se inclina a la autobiografía, al testimonio, a la poesía y a la narrativa centradas en la experiencia personal y colectiva del exilio. Entre las pocas obras que reflejan la visión, la vivencia y la convivencia que los escritores transterrados tuvieron con México, se encuentran dos textos del catalán Agustí Bartra (1908-1982): el poema Quetzalcoatl (1960) y la novela La luna muere con agua (1968).

Taking Luis De Llera’s studies on positivism in Mexico and the generation of the ‘Ateneo de la Juventud’ as a point of departure, this work proposes to extend the reflection to the Generation of 1915, also known as the generation of the “Seven Sages”; a key element to understand the evolution of Mexican thought in the 20th century. This generation has received little attention by scholars, maybe because of its place in between the golden age of the ‘ateneístas’ and the avant-garde of the ‘Contemporáneos’. This brief essay, seeks to trace a line of continuity between the ‘Ateneo de la Juventud’ and the Generation of 1915, without neglecting the elements of rupture and the differences existing between these two generations. Manuel Gómez Morin’s essay 1915 is analysed as a key text and true expression of this generation. A partir de los estudios sobre el positivismo en México y la generación del Ateneo de la Juventud realizados por Luis De Llera, propongo extender la reflexión a la Generación de 1915, conocida también como la de «Los Siete Sabios», como elemento clave para entender la evolución del pensamiento mexicano del siglo XX. Se trata de una generación poco estudiada, quizás porque se coloca entre el momento de oro de los ateneístas y la vanguardia de los «Contemporáneos». En este breve ensayo intento trazar una línea de continuidad entre el Ateneo de la Juventud y la Generación de 1915, que no omite los aspectos de ruptura y las diferencias existentes entre ambas generaciones. Se analiza el ensayo 1915 de Manuel Gómez Morin como texto fundamental y expresión de dicha generación.

This chapter aims at synthetically reconstructing the significant, even if not intense, relationship between Weber and Croce around three themes: a) the historical knowledge as an expression of intuitions or concept formation (Weber as an interpreter of the early Croce; b) “Value-analysis” and “causal regression” vs “philosophical-historical ex- planation” (Weber vs Croce); c) Croce’s interest in Weber’s political thought

In 1938 José Gaos held his first conference in Mexico on the philosophy of philosophy, reprising a theme that he had already tackled in his last Spanish years and on which he will return in his lessons of the Sixties. The result was a debate, during which Francisco Larroyo compared Gaos’ arguments, more than to the explicit diltheyan precedent, to Lask’s logic of the philosophy. From this historical pretext, the chapter aims to examine the missed encounter between Gaos and Lask as an episode of contemporary history of the infinite regress as a radically anthropological expression of philosophy.