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Victa is an Australian manufacturer of outdoor garden equipment, including petrol, electric, and battery-powered lawn mowers, edgers, trimmers, and chainsaws. The brand is best known as a manufacturer of rotary lawn mowers.
The most common self-contained power source for lawn mowers is a small 4-stroke (typically one-cylinder) internal combustion engine. Smaller mowers often lack any form of self-propulsion, requiring human power to move over a surface; "walk-behind" mowers are self-propelled, requiring a human only to walk behind and guide them.
Due to pollution laws four stroke engines are becoming more popular, particularly in the commercial market. Manufacturers include Honda, MTD and Craftsman. Companies such as John Deere carry low-emission two-stroke engine trimmers. Stihl manufactures a hybrid four stroke engine trimmer that still requires oil to be pre-mixed into the fuel.
An edge trimmer or lawn edger is a garden tool, either manual or motorised, [1] to form distinct boundaries between a lawn, typically consisting of a grass, or other soft botanical ground cover, and another ground surface feature such as a paved, concreted or asphalted area, or a granular material such as sand or gravel, or simply uncovered soil, for example an unbounded garden.
The combustion cycle can be either two-stroke (which results in a lighter engine for a given power output) [3] [4] or four-stroke (which produce lower levels of exhaust gas emissions). [5] [6] The fuel is usually either petrol or diesel. [7] In 1973, a small Wankel (rotary) engine manufactured by NSU was used in a lawn mower. [8]
The Orbital Engine Company, with funding from partner BHP and Federal Government R&D grants, [4] worked on the concept from 1972 until 1983 and had a 3.5L four stroke engine performing as well as the similar petrol car engines of the day at typical road load conditions.
Four-stroke cycle used in gasoline/petrol engines: intake (1), compression (2), power (3), and exhaust (4). The right blue side is the intake port and the left brown side is the exhaust port. The cylinder wall is a thin sleeve surrounding the piston head which creates a space for the combustion of fuel and the genesis of mechanical energy.
A 1920s experimental Almen A-4 axial engine (18-cylinder watercooled, 317 kW and 340 kg) An axial engine (sometimes known as a barrel engine or Z-crank engine) is a type of reciprocating engine with pistons arranged around an output shaft with their axes parallel to the shaft. Barrel refers to the cylindrical shape of the cylinder group (result ...
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