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Найдите в следующих предложениях подлежащее и сказуемое, подчеркните их одной и двумя чертами соответственно. Укажите время и залог сказуемого и переведите предложения на русский язык.

1. No working diesel engine has ever actually followed the cycle out-lined by Dr. Diesel in his original patent claims.

2. The idea of auto-ignition of fuel was the chief feature retained. 55

3. Naturally aspirated engines are usually designed for b.m.e.p. of about 90 lb/p.s.i. and supercharged engines for m.i.p. of 120 lb/p.s.i.

1.diesel engine has followed-present perfect active

2.the idea was retained-past passive

3.engines are designed-present passive