Nissan MA09ERT engine

The MA09ERT is a mass-produced SOHC internal combustion engine manufactured by Nissan Motors. It is a series-charged design (possessing both a turbocharger and a supercharger), seldom seen in Japanese vehicles.

Description

The "Nissan PLASMA" (Powerful & Economic, Light, Accurate, Silent, Mighty, Advanced) MA09ERT was based on the K10ET engine; Nissan attempted to improve 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 110ps (roughly 108bhp) from 74ps, 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 competition classes not otherwise possible due to rules on forced induction.

The first prototypes of these engines were installed in the March Superturbo R/March R (EK10FR type) in 1988, shortly after the engine was installed in the March Superturbo.

The MA09ERT was the first series-charged 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 mimizes the effects of turbo lag.

Specifications

Engine serial code: MA09ERT
Water-cooled 4-cylinder inline, air-air intercooler
Capacity: 930 cc
Combustion chamber shape: hemispherical
Valve system: SOHC
Bore × stroke: 66.0×68.0 mm
Compression ratio: 7.7
Compression pressure: 100 million kgf/cm² (10 terapascals) at 350 rpm
Max power (net): 110 PS (81 kW) at 6400 rpm
Max torque (net): 13.3 kgf·m (130 N·m) at 4800 rpm
Specific fuel consumption (net): 255 g/(PS･h) at 1200 rpm
Size (length × width × height): 705×575×680 mm
Maintenance weight: about 111 kg (manual transmission)
Valve timings

Valve clearances Hot

Idle rpm: M/T 750 and A/T 850
Ignition timing at idle: 15° BTDC

Oil System

Cold-weather model and 7.5 standard/W-30(SF class only for turbo)
Recommended oil grade: [turbo X]. 7.5W-30. (SG class for Nissan March Superturbo, SF for the Nissan March R)
Sump capacity: ~3.0 L
Oil filter capacity: ~0.2 L
SC oil capacity: 110 L
Shinteso MT150 made of NOK Cruba
Coolant capacity: ~4.0L

Exhaust gas purifier specifications

Fuel supply device: Nissan Motor NISSAN ECCS (Electronic Concentrated engine Control System)
Starting aids: Bimetal type air regulator
Air heating: Warm water heating on intake manifold.
Igniter: No point of contact type
Emission-reduction device: 3-way Catalyst type (monolith) and Falcat device
Catalytic converter capacity: 0.5L Maintenance target value: Idle CO/HC density of below 0.1% and 50 ppm respectively.
Air-fuel ratio control system: O2 sensor + ECCS control unit Ignition timing controller/control of Sscac: Electronic
Exhaust temperature warning device (preset temperature ℃): Fuse type (940)
Fuel evaporation (Ebapo) gas control device: Canister type
Crankcase emission control system: Close type.

Engine size

Cylinder block height (From the crank shaft center. ): 177 mm
Cylinder block length: 360 mm
Pitch between boas: P 79 mm
Cylinder boa diameter: D 66 mm
Stroke length: S 34 mm
Crank shaft Journal diameter: bj 45 mm
Crank shaft Pin diameter: db 40 mm
Crank shaft The total length: L 398 mm
Piston compression height: C 26.5 mm
Conrod center spacing: Lc 114.5 mm
Cylinder liner meat thickness: 3.5 mm

Piston/piston pin

Construction material: Aluminum alloy
Skirt outside diameter: 65.967 mm
Height: 51 mm
Compression height: 26.5 mm
Convex (concave) height of crown: 4.0 mm
Crown irregularity capacity: 17.5 mm
Pin length: 58 mm
Outside diameter: 17.5 mm
Engagement method of pin and Conrod: interference fit

Piston ring

The top B×T: 1.5 mm×2.5mm
Outer shape: Barrel force
Surface treatment: Nitride processing
Second base B×T: 1.5 mm×2.9mm
Outer shape: Taper
Surface treatment: Chrome plating Oil B×T: 2.8 mm×2.8mm

Conrod/Conroddobearing

Conrod center spacing: 14.5 mm
Large edge diameter: (D) 43 mm
Small edge diameter: (b)17.5 mm
(push inside diameter)
Width of large edge: (B) 20.0 mm
Width of small edge: (b) 20.0 mm
Inside diameter of bearing: 40 mm
Width: 17 mm
Bolt Size of screw: M8
Length under neck: 44 mm
Assembly weight: ~390 grams
Engagement method of piston pin: interference fit

Crank shaft specification

Total length: L 398.7 mm
Pin diameter: dp 40 mm
Journal diameter: dj 45 mm
Stroke: S 34 mm

Valve, valve guide and valve seat (intake/exhaust valves)

Valve diameter: φ35 mm / φ30 mm
Stem diameter: φ7 mm / φ7 mm

Valve spring

Intake/exhaust
Line diameter: 3.8 mm / 3.8 mm
Average of coil level 23.8 mm / 23.8 mm
Installation load: 16.5 kg / 16.5 kg
Travel: 40.6 mm / 40.6 mm

Oil pump rotational speed: 750/1000/3000 rpm
Exhalation pressure: ~2-4 kg/c㎡
Injection valve opening pressure: 3.5～4.0 kg/c㎡

Camshaft specification

Part Intake/exhaust
Operation angle: 62/62 degrees
Amount of cam lift: 5.5/5.6 mm
Central angle: 23/17 degrees
Overlap: 28 degrees

Timing belt and sprocket specification

Sprocket teeth on camshaft: 36
Sprocket teeth on water pump: 19
Sprocket teeth on crank: 18
Timing belt teeth: 91

See also

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