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A propulsion system for use in a hybrid vehicle, the propulsion system includes an internal combustion engine, an electric motor/generator operatively coupled to the internal combustion engine, an electric storage medium, and a propulsion system controller for actuating the propulsion system. The pr

A propulsion system for use in a hybrid vehicle, the propulsion system includes an internal combustion engine, an electric motor/generator operatively coupled to the internal combustion engine, an electric storage medium, and a propulsion system controller for actuating the propulsion system. The propulsion system controller varies the operating conditions of the electric motor/generator system in response to operating conditions of the vehicle. The propulsion system controller further varies the operating conditions of the electric motor/generator during an engine cranking sequence.

대표청구항 ▼

A propulsion system for use in a hybrid vehicle, the propulsion system includes an internal combustion engine, an electric motor/generator operatively coupled to the internal combustion engine, an electric storage medium, and a propulsion system controller for actuating the propulsion system. The pr

A propulsion system for use in a hybrid vehicle, the propulsion system includes an internal combustion engine, an electric motor/generator operatively coupled to the internal combustion engine, an electric storage medium, and a propulsion system controller for actuating the propulsion system. The propulsion system controller varies the operating conditions of the electric motor/generator system in response to operating conditions of the vehicle. The propulsion system controller further varies the operating conditions of the electric motor/generator during an engine cranking sequence. of Single Cutter Data in the Analysis of PDC Bit Designs: Part I-Development of a PDC Cutting Force Model", pp. 797-849, JPT, Aug. 1989. David A. Glowka, "Use of Single-Cutter Data in the Analysis of PDC Bit Designs: Part II-Development of PDC WEAR Computer Code", pp. 850-859, JPT, Aug. 1989. E. Detournay, P. Defourny, "A Phenomenological Model for the Drilling Action of Drag Bits", pp. 13-23, International Journal of Rock Mechanics, Mineral Sciences and Geomechanical Abstracts, vol. 29, No. 1, 1992, printed in Great Britain. Joe Kelly, Jr., "Use break-even Analysis to Optimize Bit Runs", pp. 75-79, World Oil, Nov. 1992. Geir Hareland and L.L. Hoberock, "Use of Drilling Parameters to Predict In-Situ Stress Bounds", pp. 457-471, SPE/IADC 25727, Feb. 1993. J.P.R. Sparr and L.W. Ledgerwood, Harvey Goodman, R. L. Graff and T.J. Moo, "Formation Compressive Strength Estimates for Predicting Drillability and PDC Bit Selection", pp. 569-578, SPE/IADC 29397, published Feb. 1995, Amsterdam, Netherlands. R.V. Barragan, O.L.A. Santos and E.E. Maidla, "Optimization of Multiple Bit Runs", pp. 579-589, SPE/IADC 37644, Mar. 4, 1977. R. K. Bratli, G. Hareland F. Stene, G.W. Dunsaed and G. Gjelstad, "Drilling Optimization Software Verified in the North Sea", 7 pages, SPE 39007, Aug. 1997. G. Gjelstad, G. Hareland, K.N. Nikolaisen and R.K. Bratli, "The Method of Reducing Drilling Cost More Than 50 Percent", 7 pages, SPE 47342, Jul. 1998. M.B. Ziaja and J.C. Roegiers, "Lithology Diagnosis Based on the Measurements of Drilling Forces and Moments at the Bit", IADC/SPE 47799, pp. 185-194, Sep. 1998. H. Xu, T. Hatakeyama, T. Yonezawa and A. Suzuki, "Evaluation of Bit Performance Using an Advanced Drilling-Test System", IADC/SPE 47809, pp. 247-252, Sep. 1998. H.I. Bilgesu, U. Altmis, S. Ameri, S. Mohaghegh and K. Aminian, "A New Approach to Predict Life Based on Tooth or Bearing Failures", pp. 253-257, SPE 51082, Nov. 1998. E.T. Koskie, Jr., P. Slagel and W. Lesso, Jr., "Monitoring MWD Torque Improved PDC/Bit Penetration Rates", pp. 61-67, World Oil, 1998. Michael A. Simpson, Sr., "Hand-Held Calculator Program Helps Optimize Drilling", pp. 97-101, World Oil, Apr. 1984. Kenneth L. Mason, "3-Cone Bit Selection With Sonic Logs", pp. 135-142, SPE Drilling Engineering, Jun. 1987, first published Sep. 1984 in Houston, Texas. Allen D. Gault, "Measurement of Drilling Properties", pp. 143-148, SPE Drilling Engineer, Jun. 1987, published New Orleans, Louisiana, Mar. 1985. T.M. Burgess, W.C. Lesso, "Measuring The Wear of Milled Tooth Bits Using MWD Torque And Weight-On-Bit", SPE/IADC 13475, pp. 453-458 for pages illustration, published Mar. 1985, New Orleans, Louisiana.