Patent · US Active

Handheld engine-driven working machine

US10495047B2 · kind B2 · utility

0Cited by

3References

6Claims

0Family size

Assignee

YAMABIKO CORPORATION · JP

Inventors

Kuniyoshi ETO · Wenatchee, US
Masayoshi Miyamoto · Yokohama, JP

Key dates

Filing date	Nov 28, 2017
Grant date	Dec 3, 2019
Priority date	—
Expiry date	Nov 28, 2037

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A handheld engine-driven working machine comprises an internal combustion engine and an ignition control device; wherein the ignition control device can switch its control between a normal mode and a operation mode, wherein during the operation mode, the ignition timing within the high speed range is maintained at a second BTDC angle, and the ignition timing within the medium speed range is advanced more than a third BTDC angle between a first BTDC angle and the second BTDC angle, and wherein at any rotational speed within the medium speed range, the ignition timing during the operation mode is advanced more than the ignition timing during the normal mode.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.