
Contents
xv
9.4 Other aspects of engine management 391
9.4.1 Introduction 391
9.4.2 Variable valve timing 391
9.4.3 Lean burn engines 394
9.4.4 Two-stroke engines 394
9.4.5 Combustion control system 395
9.4.6 Active cooling 397
9.4.7 Engine trends – spark ignition 399
9.4.8 Transonic combustion 400
9.4.9 Diagnosing engine management
systems 401
9.5 Advanced engine management technology 405
9.5.1 Speed density and fuel calculations 405
9.5.2 Ignition timing calculation 406
9.5.3 Dwell calculation 408
9.5.4 Injection duration calculation 408
9.5.5 Developing and testing software 409
9.5.6 Articial Intelligence 411
9.5.7 ...