At the heart of Arctic Cat’s new BLAST models for 2021 is the industry’s first electronic fuel-injected, single-cylinder, 2-stroke engine – the 65+ HP-class C-TEC2 4000.
With an industry-first design that’s compact and lightweight (under 50 pounds), this 400-class (397cc) two-stroke single-cylinder engine with electronic fuel injection and 3-stage exhaust port modifier (power valve) system delivers impressive throttle response and surprising engine performance. Rated at 65+ HP-class performance, it is well less than half the power of the 800cc twin (rated at 165 HP-class performance). A counter-balance shaft eliminates most engine vibration.
Single Cylinder Engine For Sale
This new engine is basically half of the C-TEC2 8000 engine, sharing much of the engineering and design along with many of the components. For example, the piston and cylinder are the exact same parts as found on the 800, as are many other components which all help to reduce the overall development and production costs.
Sep 13, 2015 In two stroke engine the suction and exhaust strokes are eliminated. There are only two remaining strokes – these are the compression stroke and Expansion or power stroke and usually called as upward stroke and downward stroke. Instead of valves, the two stroke engine consists of inlet and exhaust ports. A 2- stroke engine has 2 strokes ( and 1 revolution of crankshaft) in a cycle whereas in 4-stroke, there are 4 strokes per cycle ( and 2 revolutions of crankshaft). A 2-stroke engine has 3 ports( inlet port, outlet port and transfer port) whereas.
In our initial testing of the three models fitted with this engine, the performance actually exceeded our expectations. Each sled is truly fun to ride, as the clutching and gearing calibrations make use of the power and get it to the ground most efficiently. The bottom end and mid range was where the power was generous and fun to use, where on the top end it flattens out. That said, the top speed capability of the ZR 4000 was still amazing, it just takes a while to get there.
Links to all five feature articles on the 2021 Arctic Cat Blast:
Arctic Cat’s Single-Cylinder 2-Stroke EFI Engine
2021 Arctic Cat BLAST Power to Weight Ratios
Hit or Miss? The 2021 Arctic Cat BLAST
Want more snowmobile content like this? You can subscribe to SnowTech Magazine using the link below. Starting at just $15!
Figure 2-8. - Comparison of two-stroke and four-stroke cycles.
the diesel engine, many parts are somewhat heavier and stronger, so they can withstand higher temperatures and pressures that the engine generates. The engines differ also in the type of fuel used and how the air-fuel mixture is ignited. In a gasoline engine, the air and fuel are mixed together in a carburetor or fuel injection system. After this mixture is compressed in the cylinders, it is ignited by an electrical spark from the spark plugs.
Two Cylinder Engines For Sale
A diesel engine has no carburetor. Air alone enters the cylinder where ii is compressed and reaches a high temperature due to compression. The heat of compression ignites the fuel injected into the cylinder and causes the air-fuel mixture to burn. A diesel engine requires no spark plugs; the contact of diesel fuel with hot air in the cylinders causes ignition. In a gasoline engine, the heat from compression is not enough to ignite the air-fuel mixture, so spark plugs are required.
The discussion so far has been on a single cylinder engine. A single cylinder provides one power impulse every two crankshaft revolutions in a four-stroke-cycle engine and is delivering power only one fourth of the time. To provide for a more continuous flow of power, modem engines use four, six, eight. or more cylinders. The same series of cycles discussed previously take place in each cylinder.
Antique Single Cylinder Engines
In a four-stroke cycle, six-cylinder engine, for example, the throws on the crankshaft are set 120 degrees apart, the throws for cylinders 1 and 6, 2 and 5, 3 and 4 being in line with each other (fig. 2-9). The cylinders fire or deliver power strokes in the following order: l-5-3-6-2-4. The power strokes follow each other so closely that there is a fairly continuous and even delivery of power to the crankshaft.
Even so, additional leveling off of the power impulses is desirable, so the engine runs more smoothly. A flywheel (fig. 2-9) is used to achieve this result.
To understand how the flywheel functions, let's consider a single cylinder engine. It is delivering power only one fourth of the time during the power stroke.
Figure 2-9. - Crankshaft for a sixcylinder engine.
Continue Reading