A new method to warm up lubricating oil to improve the fuel efficiency during cold start

Cold start driving cycles exhibit an increase in friction losses due to the low temperatures of metal and media compared to normal operating engine conditions. These friction losses are responsible for up to 10% penalty in fuel economy over the official drive cycles like the New European Drive Cycle (NEDC), where the temperature of the oil even at the end of the 1180 s of the drive cycle is below the fully warmed up values of between 100°C and 120°C. At engine oil temperatures below 100°C the water from the blow by condensates and dilutes the engine oil in the oil pan which negatively affects engine wear. Therefore engine oil temperatures above 100°C are desirable to minimize engine wear through blow by condensate. The paper presents a new technique to warm up the engine oil that significantly reduces the friction losses and therefore also reduces the fuel economy penalty during a 22°C cold start NEDC. Chassis dynamometer experiments demonstrated fuel economy improvements of over 7% as well as significant emission reductions by rapidly increasing the oil temperature. Oil temperatures were increased by up to 60°C during certain parts of the NEDC. It is shown how a very simple sensitivity analysis can be used to assess the relative size or efficiency of different heat transfer passes and the resulting fuel economy improvement potential of different heat recovery systems system. Due to its simplicity the method is very fast to use and therefore also very cost effective. The method demonstrated a very good correlation for the fuel consumption within ±1% compared to measurements on a vehicle chassis roll.

Physiological stress responses in the warm-water fish matrinxã (Brycon amazonicus) subjected to a sudden cold shock

The present work evaluated several aspects of the generalized stress response [endocrine (cortisol), metabolic (glucose), hematologic (hematocrit and hemoglobin) and cellular (HSP70)] in the Amazonian warm-water fish matrinxã (Brycon amazonicus ) subjected to an acute cold shock. This species farming has been done in South America, and growth and feed conversion rates have been interesting. However, in subtropical areas of Brazil, where the water temperature can rapidly change, high rates of matrinxã mortality have been associated with abrupt decrease in the water temperature. Thus, we subjected matrinxã to a sudden cold shock by transferring the fish directly to tanks in which the water temperature was 10oC below the initial conditions (cold shock from 28ºC to 18oC). After 1h the fish were returned to the original tanks (28ºC). The handling associated with tank transfer was also imposed on control groups (not exposed to cold shock). While exposure to cold shock did not alter the measured physiological conditions within 1h, fish returned to the ambient condition (water at 28º C) significantly increased plasma cortisol and glucose levels. Exposure to cold shock and return to the warm water did not affect HSP70 levels. The increased plasma cortisol and glucose levels after returning the fish to warm water suggest that matrinxã requires cortisol and glucose for adaptation to increased temperature.

Australia, New Zealand and cultural diplomacy in the Cold War : an unanticipated consequence of the Colombo Plan

Considers the part planned, part accidental ventures in public diplomcy by Australia and New Zealand during the 1950s and 1960s, resulting from membership of the Colombo Plan for aid to South and Southeast Asia.

American technology policy: evolving strategic interests after the Cold War

Since the end of the Cold War, U.S. policymakers have faced the challenge of addressing the technological requirements of both economic competitiveness and national security. Promoting the technological objectives of competitiveness and security poses a daunting task, as these objectives can differ significantly in terms of autonomy, the private sector’s role, and the time frame involved. The difficulties inherent in meeting these competing needs for technological investment and resources are exacerbated by growing technological globalization. American Technology Policy analyzes the ongoing efforts of politicians, legislators, policymakers, and industry leaders to balance their often-conflicting technological requirements. J. D. Kenneth Boutin examines recent trends and developments in American technology policy as it strives to support high-technology firms without undermining national security. He then considers issues of autonomy, relations between the federal government and industry, and the time frame involved in formulating and implementing policy initiatives, all in the context of globalization. Though satisfying the ambitious American technological agenda is difficult, it is impossible for authorities to avoid making the effort, given the high stakes involved. Boutin’s analysis is intended to inform those who are charged with prioritizing and balancing the technological needs of national defense and economic growth. Although the post–Cold War technology policy of the United States has been characterized by efforts to achieve a balance between these two competing priorities, the dominant focus remains on national security. Boutin explains the ways in which American authorities seek to limit the extent of compromise necessary by working with local and foreign actors and by encouraging structural changes in the environment for technological development, application, and diffusion.