Mazda 2.2 SkyActiv-D Engine Specs, Problems, and Reliability. The 2.2 SkyActiv-D (the SH-VPTR and SH-VPTS) is the 2.2-liter turbo-diesel engine that is based upon its predecessor – the MZR-CD. The primary difference is that the new engine has actually a decreased compression ratio. It dropped from 16.3 to 14, and this number is quite low for diesel engine and practically the same as SkyActiv gas engines have.
Lowering the compression ratio to 14 is visibly dropped the temperature and pressure in the cylinder. That increased the efficiency of the engine however got worse the mixing of the fuel-air mix and its self-ignition at cold start of the engine and its warm-up. The engineers had to introduce new ceramic radiance plugs which heat the air in the combustion chamber to 1000 degrees Celsius in 2 seconds since of this.
Another system that is rarely used in diesel engines is the stage change system (for consumption valves in this engine). Variable exhaust valve lift (VVL) opens the exhaust valves a little during the consumption stroke. Hot exhaust gases permeate back into the cylinder and increase the air temperature. This innovation assists to prevent misfiring throughout warm-up and provides effective cold temperature operation.
A little compression ratio substantially minimized the load on the engine and decreased pumping losses. Now it ended up being possible to reduce the weight of the primary engine parts without loosing in reliability. The 2.2 SkyActiv-D engines have an aluminum alloy cylinder block. There are a chain-driven two balancer shafts to offset secondary inertia forces. The 2.2 SkyActiv-D engines have an aluminum DOHC cylinder head, four valves per cylinder, and roller rocker arms. The head now has an integrated exhaust manifold. In addition to lowering the size and weight of the engine, it speeds up the heating procedure of the catalytic converter. The engine was geared up with a brand-new fuel system also. All 2.2 SkyActiv-D engines have a modern common-rail injection system via multi-hole piezo injectors.
The engine was geared up with 2 turbochargers, combined in one unit. Two-stage turbocharging allows you to connect advantages of big and small turbines. A little turbocharger (high-pressure turbine) has a quick reaction and produces a high boost pressure at low engine speeds, and a large turbocharger (low-pressure turbine) at high engine speeds. This unit considerably increases low- and high-end torque (as much as the 5,200 rpm rev limitation). The 2.2 SkyActiv-D engine had a diesel particle filter (DPF). Without a filter, as all modern-day engines, it would not satisfy exhaust gas emissions requirements such as Euro VI in Europe.
To summarize, the brand-new turbodiesel is 10% lighter and 20% more fuel efficient than its predecessor. However the maximum power and torque did not grow up.
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2.2 SkyActiv-D Engine Problems and Reliability
There are no extreme stats of common problems and issues for 2.2 SkyActiv-D diesel engines. Unusual facts were registered with an increasing oil level and frequent regrowth cycles. Cars with comparable symptoms tend to have high fuel consumption. But it is just possible to presume that there will not be too many serious problems with them because the loads have been considerably reduced.
Mazda 2.2 SkyActiv-D Engine Specs
|Cylinder block material
|Cylinder head material
|Common rail direct injection
|Number of cylinders
|Valves per cylinder
|86.0 (3.38 in)
|94.3 (3,70 in)
|2,191 cc (133.7 cu in)
|Type of internal combustion engine
|173 hp (129kW)/ 4,500
|Torque, lb ft
|310 lb-ft (420 Nm)/ 2,000
|Engine oil weight
|Engine oil capacity, liter
|5.1 (0.3 – filter capacity)
|Oil change interval, mile
|12,000 (20,000 km)/12 months
|Mazda CX-5 (KE, KF), Mazda Mazda6 (GJ, GL), Mazda BM Mazda3 XD Astina