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Control system for engines and automatic transmissions

  • US 5,405,303 A
  • Filed: 01/28/1994
  • Issued: 04/11/1995
  • Est. Priority Date: 07/16/1990
  • Status: Expired due to Term
First Claim
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1. A control system for controlling both:

  • an engine having a plurality of cylinders, a plurality of intake ports formed individually for said cylinders, a plurality of intake valves for opening or closing said intake ports individually for said cylinders, and a control valve for opening or closing one of the intake ports of each of said cylinders; and

    an automatic transmission connected to said engine and having friction means to be engaged by an oil pressure regulated by pressure regulation means, comprising;

    valve control means for opening said control valve, when an engine load is high, and for closing said control valve when the engine load is low;

    air/fuel ratio control means for making an air/fuel ratio when said control valve is closed higher than that when said control valve is open; and

    regulation level change means for changing a regulation level by said pressure regulation means in accordance with the ON/OFF state of said control valve.

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