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Screw engine with regenerative braking

  • US 5,241,817 A
  • Filed: 10/30/1991
  • Issued: 09/07/1993
  • Est. Priority Date: 04/09/1991
  • Status: Expired due to Term
First Claim
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1. A screw engine for propelling a wheeled vehicle via a continuously variable transmission, comprising(a) screw compressor means mounted on a shaft connected with the continuously variable transmission for compressing air;

  • (b) means defining a combustion chamber connected with said screw compressor means and having a fuel input for forming a mixture of fuel and compressed air from said screw compressor and igniting the mixture to produce combustion products;

    (c) screw expander means mounted on the shaft connected with the continuously variable transmission and connected with said combustion chamber means for expanding the combustion products to produce a work output for driving the continuously variable transmission and an exhaust output;

    (d) a variable supercharger for supplying air at variable rates to said screw compressor means;

    (e) sensor means connected with said screw expander means for sensing the exhaust output; and

    (f) control means connected with said sensor means for controlling said variable supercharger to vary the air supplied to said screw compressor means, whereby the ratio of the fuel and air in said combustion chamber can be controlled independently of engine speed for optimum combustion.

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