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Lawn mower powered by cylinder deactivation engine

  • US 10,306,828 B2
  • Filed: 03/15/2017
  • Issued: 06/04/2019
  • Est. Priority Date: 03/18/2016
  • Status: Active Grant
First Claim
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1. A lawn mower, comprising:

  • a lawn mower main body provided with a propelling device;

    a power source for selectively powering the propelling device;

    a traveling state sensor for detecting a traveling state of the lawn mower;

    an internal combustion engine having a plurality of cylinders and supported by the lawn mower main body;

    an engine control unit for performing a cylinder deactivation control including selectively deactivating at least one of the cylinders;

    a cutting blade rotatably supported by the lawn mower main body via a cutter deck and connected to the engine in a power transmitting relationship;

    a blade clutch provided in a power transmission path between the engine and the cutting blade;

    a height adjustment mechanism provided on the cutter deck for adjusting a height of the cutting blade; and

    a central control unit for controlling an operation of the blade clutch, the height adjustment mechanism and the engine control unit;

    wherein the central control unit is configured to determine the cylinder deactivation control is to be performed when the lawn mower travelling forward with the cutting blade at a non-elevated height comes to a stop, and to raise the cutting blade to a prescribed elevated height before performance of the cylinder deactivation control.

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