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ABB公司新推出的高压比VTR…4P和VTC…4P系列增压器,压比高达5。当今四冲程柴油机,平均有效压力大约在2.4～2.5MPa,要求增压器压比为4。预计不久将来柴油机平均有效压力将达2.8MPa,要求全负荷时增压器压比为4.5,超负荷时为5。为此对这种最新发展的增压器提出了如下要求: a.压比须达5,但增压器效率仍应保持原VTR…4和VTC…4系列的水平,甚至更高些; b.在压比增大引起机械负荷增加的情况下,仍须确保高的可靠性; c.应保留VTR和VTC系列的成熟结构;
ABB’s new high-pressure ratio VTR ... 4P and VTC ... 4P series superchargers with a pressure ratio of up to five. Today’s four-stroke diesel engine, the average effective pressure of about 2.4 ~ 2.5MPa, turbocharger pressure ratio of 4. It is estimated that in the near future, the average effective pressure of diesel engine will reach 2.8MPa, and the required turbocharger pressure ratio is 4.5 at full load and 5 when overloaded. To this end, the latest developments in turbochargers have been made as follows: a. The pressure ratio has to be up to 5, but the turbocharger efficiency should still be at the level of the original VTR ... 4 and VTC ... 4 series even higher; b Maintains high reliability with increased mechanical load due to increased pressure ratio. C. Mature structure of VTR and VTC series should be retained.