| 摘要 |
PCT No. PCT/US93/02729 Sec. 371 Date Feb. 2, 1995 Sec. 102(e) Date Feb. 2, 1995 PCT Filed Sep. 19, 1993 PCT Pub. No. WO94/03717 PCT Pub. Date Feb. 17, 1994Lean burn, exhaust gas recirculating internal combustion engine system (10) and process of operation wherein a motor driven valve (16) governs tapping of exhaust gas via a conduit (11) to the high pressure side of a throttle (14) in an air intake region of the engine with control of the valve and lean burn to maintain a) lean operation with high exhaust dilution at light engine loads, b) high exhaust dilution and high overall dilution at medium to high engine loads and c) smooth transition between a) and b).
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