I.M.F. Adds $430 Billion in Emergency Lending Ability WASHINGTON - The International Monetary Fund has raised at least $430 billion in extra lending capacity to be used if the euro zone crisis worsens or global financial conditions deteriorate, it said Friday afternoon. The announcement came during the spring meetings of the I.M.F. and its sister institution, the World Bank. World leaders gathered in Washington to discuss how to bolster growth, reduce unemployment and poverty and ensure financial stability around the world. "We warmly welcome pledges by our members to increase I.M.F. resources by over $430 billion, almost doubling our lending capacity," Christine Lagarde, the managing director of the I.M.F., said in a statement. We made a call to action and our members have delivered. The new commitments come mostly from wealthy, developed economies: $60 billion from Japan; $15 billion each from Britain, Saudi Arabia and South Korea; and smaller amounts from countries including Sweden, Norway, Poland, Australia, Denmark and Singapore. Those sums will join $200 billion in previous commitments from euro zone countries. But some rapidly growing, cash-rich emerging economies - including Brazil, China, Russia and India - made no specific pledges at the spring meetings. They have indicated that they will contribute, Ms. Lagarde said, but they have not committed to specific dollar amounts. The countries are expected to name their precise contributions at a Group of 20 summit meeting in Mexico in June, after consulting with their governments at home. Emerging countries have argued that they should have more voting power within the fund if they are going to contribute more financing. They have been vocally critical of continued American and European dominance over the I.M.F. In prepared remarks to be delivered on Saturday, Guido Mantega, the finance minister of Brazil, castigated the fund for not moving quickly enough to enact quota changes made in 2010. And he argued that voting within the fund should be proportional to the countries" economic output, to give the organization greater legitimacy among its members. "The calculated quota share of Luxembourg is larger than the one of Argentina or South Africa," his remarks read. The quota share of Belgium is larger than that of Indonesia and roughly three times that of Nigeria. And the quota of Spain, amazing as it may seem, is larger than the sum total of the quotas of all 44 sub-Saharan African countries. An American official, speaking on the condition of anonymity to avoid disturbing diplomatic relations, said the new financing pledges were not expected to change the voting shares within the fund. The $430 billion in new commitments represent a temporary buffer in case the I.M.F. needs additional capacity in the coming years, the official said, not a change in permanent quota contributions. The United States has said it will not pledge any more money to the fund, arguing that Europe's problems are its own to fix and that the I.M.F. has enough spare lending capacity. "Europe is a rich continent," Timothy F. Geithner, the Treasury secretary, said in remarks at the Brookings Institution this week. Europe has to play "the dominant financial role" in its own crisis, he argued. The American official who talked about the new financing pledges said that other Group of 20 countries had not criticized Washington's decision to refrain from contributing additional funding to the I.M.F. In a meeting with reporters on Friday, François Baroin, the French finance minister, said he understood that the Obama administration's hands were tied by Congress - which would need to approve any additional contributions to the I.M.F. - and said the United States had helped in Europe in other ways. The new contributions to the I.M.F. came after the fund reassessed the global economy after continued troubles in Europe this winter. Its economists determined that in the coming years, countries around the world might require up to $1 trillion in new loans because of problems arising from the euro zone and more general sluggish global growth. The fund agreed to raise about $500 billion in new lending capacity if Europe would raise a commensurate amount for its own bailout fund. Last month, European leaders agreed to bolster the continent's firewall - the permanent European Stability Mechanism, which will begin operating this summer and run alongside the temporary European Financial Stability Facility - to 800 billion euros, or $1 trillion, from 500 billion euros. That opened the door for the additional contributions to the I.M.F. this week. World leaders have praised Europe for the steps it has taken in the last six months to end its sovereign debt crisis: the European Central Bank made unlimited, cheap short-term loans to financial institutions; countries including Spain and Italy committed to austerity budgets; Europe agreed to a bigger firewall; and Greece restructured its debt. But Europe remains the center of the crisis, Ms. Lagarde said this week, and countries need to remain vigilant about the risks of the crisis spreading and slow growth. She also said that European governments needed to follow through on their budget promises and reforms and to try to bring down unemployment. Recently, Spanish bond yields have started climbing, raising widespread concern that the country will need a bailout from the European Union and the I.M.F. The fund announced the new lending capacity in a joint statement with the Group of 20 nations, whose finance ministers and central bankers also met in Washington on Friday.