Nissan MA09ERT engine


The MA09ERT is a mass-produced SOHC internal combustion engine manufactured by Nissan Motors. It is a series-charged design, seldom seen in Japanese vehicles.

Description

The "Nissan PLASMA" MA09ERT was based on the K10ET engine; Nissan attempted to improve performance and response by adding a supercharger to the 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, 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 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 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 at 350 rpm

Max power : 110 PS at 6400 rpm

Max torque : 13.3 kgf·m at 4800 rpm

Specific fuel consumption : 255 g/ at 1200 rpm

Size : 705×575×680 mm

Maintenance weight: about 111 kg

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

Recommended oil grade: . 7.5W-30.

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

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 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 : Fuse type

Fuel evaporation gas control device: Canister type

Crankcase emission control system: Close type.

Engine size

Cylinder block height : 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 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: 43 mm

Small edge diameter: 17.5 mm



Width of large edge: 20.0 mm

Width of small edge: 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