Two-stroke engines from 2010 to 2012 there is a market – the engine, mechanical
Look two-stroke Engine Only snow in the last position of the vehicle, but rely on advanced liquid cooling, electronic control, fuel injection and combustion technology, as well as additional adjustable throttle exhaust side of technology, two-stroke snowmobile engines to focus on introduced in 2012, the U.S. EPA (EPA) Phase III emission standards, thus creating the final height of the situation.
With high unit power, high power-weight ratio and size advantage, whether two-stroke engine four-stroke engine can withstand the attack?
BRP Bombardier power products engineers insist that their answer definitely. Bombardier power products latest RotaxE-TEC800R uses direct injection technology, and in 2011 for Ski-Doo snowmobile (Rotax Road special Si, Ski-Doo, Evinrude marine engine company and Sea-Doo hi degree of boats and other companies under its command in Bombardier).
DI 800R is the Rotax 797 series engine company's latest iteration product, which is a 800 ml volume of liquid-cooled parallel twin-screw 155 horsepower (115 kW) engine.
Not limit emissions of hydrocarbons 150g/kW h, carbon-oxygen compounds 400g/kW h, compared with the U.S. EPA (EPA) emissions standards for theoretical about the third stage reduction 50%. Hydrocarbon emission standards limit the direct 75g/kW h, carbon-oxygen compounds, the average emission limit standards 275g/kW h
For two-stroke design, the emission of carbon and oxygen compounds, the biggest challenge is the combustion chamber combustion. Rotax's R & D team will voice coil electromagnetic injector used in direct injection systems, which will pump the fuel out of a relatively low pressure region further pressure to 500psi while lb / square inch (34 bar) pressure of the fuel injection 800R cylinder.
Oil flow under the pressure of instant vaporization, and then ignited by the spark plug. Bombardier engineers said that the previous two-stroke combustion of carbon compared to the aforementioned method can achieve better combustion results, and better Valve Effect. The improved results also reflected in the emissions, E-TEC direct injection engine start when the pungent smell of decline.
Combination with direct injection systems were: BRP reed Inductor ,3-DRAVE (Rotax Adjustable flow valve outlet) exhaust valves and high electromagnetic electronic control unit (deal with Sensor Input data, such as the crank arm angle, throttle position, lock status, coolant temperature and ambient pressure and temperature). Meanwhile, the open-loop fuel system vents and electronic control unit for cooling.
3-D three-dimensional icon is used to control exhaust Valve And each Cylinder The above three vents.
Bombardier said, Ski-Doo 800R using the new engine, its fuel consumption to reach 19 miles / gallon (12.3l/100km), compared to competitive products with 37% lower fuel consumption.
Direct injection technology, other benefits include: easy to start, better idle performance and higher fuel efficiency?? 264 miles per quart ((450km / L), according to company claims, compared with the 2010 edition 800R carbon combustion 15% increase.
800 engine with direct injection (600 ml engine is also equipped with the technology) to prove that the two-stroke engine still has great vitality.
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