Hydraulic control system for a variable compression ratio internal combustion engine

  • US 6,990,933 B2
  • Filed: 07/02/2003
  • Issued: 01/31/2006
  • Est. Priority Date: 07/02/2003
  • Status: Expired due to Fees
First Claim
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1. A control system for varying the compression ratio of an engine cylinder, comprising:

  • a crankshaft assembly including a maximum limiting stop and a minimum limiting stop;

    a hydraulic positioning device connected to the crankshaft assembly, said positioning device adapted to move the crankshaft assembly within a range defined by the maximum limiting stop and the minimum limiting stop;

    a constant pressure reservoir;

    a hydraulic connection between the constant pressure reservoir and the hydraulic positioning device.

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