Nissan MA engine
Template:Infobox automobile engine The MA is a straight-4 SOHC 0.9 L, 1.0 L, or 1.2 L engine first introduced in 1982 by Nissan, intended primarily for the K10 series Micra/March model. It shares design similarities with the older E engine, with an 8-valve hemispherical cylinder head but differs in that it uses an aluminium cylinder block. Unusually, the specified ignition timing for the MA10 running on the specified 90 RON gasoline was 2 degrees after top dead centre, reflecting a very high flame speed in the compact combustion chambers.
MA09ERT
The MA09ERT is a twin-charged design (possessing both a turbocharger and a supercharger), an unusual design, particularly for Japanese vehicles.[1] It powered the March Superturbo, March R, and the March Superturbo R.
The "Nissan PLASMA" (Powerful & Economic, Light, Accurate, Silent, Mighty, Advanced) improved performance and response by adding a supercharger to the (already turbocharged) MA10ET engine, which is a four-cylinder water-cooled OHC engine with a V-type valve arrangement and hemispherical combustion chambers, with sequential fuel injection.
The supercharger improved the response and the output in the low-rpm region (where turbochargers are typically less effective), and a new larger HT10 turbocharger aimed to improve output in the high-rpm regions. An intercooler and an updated intake manifold were added, the latter having a much larger throttle body and improved fuel rail. The result was an increase in output to Template:Cvt from Template:Cvt, and a much broader range of torque. Other changes included a reduction of engine capacity from 988 cc to 930 cc; this strengthened the engine by increasing the bore wall thicknesses by 1 mm, and allowed cars using it to enter sub-1300 cc competition classes not otherwise possible due to conversion factors applied to forced induction engines.
The first prototypes of these engines were installed in the March Superturbo R/March R (EK10FR type) in 1988; shortly thereafter the engine was installed in the March Superturbo.
The MA09ERT was the first twincharged engine available in Japan; series charging combines the increased low-speed torque of supercharging with the increased high-speed torque and power of turbocharging. The presence of the supercharger also minimizes the effects of turbo lag.
| File:St-engine-bay-cropped.jpg MA09ERT engine |
- Specifications
- Water-cooled 4-cylinder inline, air-to-air intercooler
- Valve system: SOHC, 2 valves per cylinder
- Displacement: Template:Convert
- Bore: Template:Convert
- Stroke: Template:Convert
- Maximum power: Template:Cvt at 6500 rpm
- Maximum torque: Template:Cvt at 5200 rpm
- Compression ratio: 7.7:1
- Weight: Template:Convert
- Size (length × width × height): 705×575×680 mm
- Specific fuel consumption (net): 255 g/(PS･h) at 1200 rpm
MA10S
The MA10S is an engine with an electronically controlled carburetor. It was used in the Be-1 and 1982–1992 Micra (K10) and Pao. It has a hemi-head and, unusually, the spark is fired after top dead centre because of the very high flame speed in a compact engine with this head design. Compression in the Template:Cvt version was relatively low so that it was able to run on 90 RON petrol where available.
- Specification
- Water-cooled inline-4 cylinder
- Displacement: Template:Cvt
- Bore and stroke: Template:Cvt
- Compression ratio: 9.5:1
- Maximum power (net): Template:Cvt at 6000 rpm
- Maximum torque (net): 75 N·m (55 lb·ft) at 3600 rpm
- 1-bbl carburettor
- K10 March G series Middle 2 model MA10S engine photograph image
MA10E
The MA10E was used in the Nissan Saurus Jr.
- Displacement: Template:Cvt
- Maximum power: Template:Cvt at 5600 rpm
MA10ET
The Nissan MA10ET powered the Figaro and K10 March Turbo.
- Displacement: Template:Cvt
- Bore and stroke: Template:Cvt
- Maximum power: Template:Cvt at 6000 rpm
- Maximum torque: Template:Cvt at 4400 rpm
- Compression ratio: 8.0:1
- Fuel supply device: Nissan Motor ECCS
- Power resource(V-AH): 12-30
- March Turbo Type 1 (A-1) Engine Photograph
MA12S
The MA12S is the designation for the larger Template:Convert engine, featuring an enlarged bore as well as stroke. It was used in the Nissan Micra K10.
- Displacement: Template:Convert
- Bore: Template:Convert
- Stroke: Template:Convert
- Maximum Power: Template:Cvt / 5600 rpm
- Maximum Torque: Template:Convert / 3600 rpm
- Compression Ratio: 9.0:1
See also
References
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