Nissan MA MA09ERT
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The MA09ERT is an engine that Nissan Motors manufactures. It is a mass production engine that adopted the compound series supercharger system ("Double Charge"), seldom seen in the history of the Japanese car.
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[edit] Overview
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. The supercharger improved the response and the output in the low-rpm region where the turbocharger was out of its efficiency range, and the new larger HT10 turbocharger aimed to improve the output in the high-rpm regions. The whole system was also now fitted with an intercooler and an updated intake manifold with much larger throttle body and improved fuel rail, the result an increase to 110ps from 74ps, and a much broader range of torque. Other changes included reducing the engine capacity from 988cc to 930cc. This was done for two reasons. The first it added to the strengh of the engine by increasing the bore wall thicknesses by 1mm and second it also allowed the car to classes not otherwise possible due to forced induction rules.
The first prototypes of these enginers were installed in the March Superturbo R/March R (EK10FR type) in 1988 shortly after the engine was installed in the March Superturbo.
[edit] Specifications
Engine serial code: MA09ERT
Water-cooled 4 cylinder inline, air-air intercooler
Total 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
- Inlet: 11.57
- 57.17
Valve clearances Hot
- intake 0.25 mm
- exhaust 0.30 mm
Idle rpm M/T 750 and A/T 850
Ignition timing at idle 15° BTDC
Maintenance target value
Idle CO and HC density are below below 0.1% and 50 ppm.
Engine oil
Cold-weather model and 7.5 standard/W-30(SF class only for turbo)
Recommended oil in service is [turbo X]. 7.5W-30. (SG class)
- About the use engine oil
7･5W-30(SF class only for turbo) Note and Nissan March R sale this time 7･5W-30(SG class only for turbo)
Note and Nissan March Superturbo(ST) sale this time
[H level] of capacity of oil pan 3.0 L
About 0.2 L capacity of oil filter
About [H level] 110 L of capacity of SC oil
- When supercharger oil factory is shipped
Shinteso MT150 made of NOK Cruba
About four in all capacity (L) of cooling water
[edit] Exhaust gas purifier specifications
Fuel supply device: Nissan Motor NISSAN ECCS (Electronic Concenrated engine Control System)
Starting aids: Bimetal type air regulator
Air heating: Warm water heating on intake manifold.
Igniter: No point of contact type
CO and HC (NOx) decrease device
- 3-way Catalyst type (monolith)
- It will apply it soon. The size of the catalyst converter (capacity L) (0.5)
The vehicle exhaust emission decrease device when decelerating: Falcat device
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.
[edit] Engine size
Height of cylinder block (From the crank shaft center. ) H(mm)177
The total length of cylinder block Lb(mm)360
Pitch between boas P(mm)79
Cylinder boa diameter D(mm)66
Stroke S(mm)34
Crank shaft Journal diameter bj(mm)45
Crank shaft Pin diameter db(mm)40
Crank shaft The total length L(mm)398
Piston compression Height C(mm)26.5
Distance between Conrod centers Lc(mm)114.5
Thickness of cylinder liner meat 3.5
[edit] Piston/piston pin
Outside diameter of skirt (gauge diameter) (mm) 65.967
Height (mm) 51
26.5 Compression height (mm)
Convex (concave) height of crown (mm) 4.0
Crown irregularity capacity (mm) 17.5
Material Aluminum alloy
The pin length (mm) 58
Outside diameter (mm) 17.5
Engagement method of pin and Conrod: A press fit
Assembly of selection of piston and cylinder block When factory is shipped for piston clearance securing The cylinder boa has been selected by each of three grades.
[edit] Piston ring
The top B×T(mm) 1.5×2.5
- Outer shape Barrel force
- Surface treatment Nitride processing
Second base B×T (mm) 1.5×2.9
- Outer shape Taper
- Surface treatment Chrome plating Oil B×T (mm) 2.8×2.8
[edit] Conrod/Conroddobearing
14.5 between Conrod centers distance (L) (mm)
- Large edge diameter (D)(mm)43
- Small edge diameter (b)(mm)17.5
- (push inside diameter)
- Width of large edge (B)(mm)20.0
- Width of small edge (b)(mm)20.0
Inside diameter of bearing (mm)40
- Width (mm)17
Bolt Size of screw (M8)
- Length under neck (mm)44
ASSY Weight (gr)About 390
Engagement method of piston pin: A press fit
[edit] Crank shaft specification
The total length L (mm) 398.7
Pin diameter dp (mm) 40
Journal diameter dj (mm) 45
Stroke S (mm) 34
[edit] Valve, valve guide and valve seat
- Intake valve/exhaust valve
Valve diameter (mm) φ35 / φ30
Stem diameter (mm) φ7 / φ7
[edit] Valve spring
Intake/exhaust
Line diameter (mm) 3.8 / 3.8
Average of coil level (mm) 23.8/ 23.8
Installation load (kg) 16.5/ 16.5
Freedom length (mm) 40.6 / 40.6
･Adoption of lubricating oil pump and trochoid type Engine
(lubricating oil pump)Rotational speed (rpm) 750 1000 3000
Exhalation pressure (kg/c㎡) About two About three About four Reguratarbalb injection-valve opening pressure (kg/c㎡) 3.5～4.0
･Turbo-charger relation
Model HT10
A/R 0.83
About maximum supercharging pressure (mmHg) and 700
･Swing valve
About controller 760 injection-valve opening pressure (mmHg)
For pressure Noboru of note and an abnormal supercharging
The system that Falcats it is adopted.
･The main bearing cap and the main bearing
The cap assumes the methods connected on earth and has improved the rigidity.
･The main bearing
For the crank journal oil clearance securing When the factory is shipped, the cylinder block housing.
By combining the inside diameter and the inside diameter of the crank journal. The bearing from among six kinds of thickness It becomes a selection assembly method.
･Clamping Pooley
By the first step, Idorarpre or the air conditioner
770mm Oltarnatar (Pori V4 mountain) 825mm (Pori V3 mountain) mm
The 2nd step and 745 mm supercharger drive (Pori V4 mountain) mm
[edit] Camshaft specification
Part Intake/exhaust
Operation corner (times) 62/62
Amount of cam lift (mm) 5.5/5.6
Central angle (times) 23/17
Overlap (times) 28
[edit] Timing belt and sprocket specification
Cam Number of sprocket teeth and 36
Water pump Number of sprocket teeth and 19
Crank Number 18 of sprocket teeth
Beltotenshonar method Spring type
Beltotenshonar outside diameter (mm) Φ50.2
Number of timing belt teeth 91
[edit] Explanation
The MA10ET and the basic structure is the same four water-cooled series cylinders OHC, and is V type valve arrangement crossing flow Shaiki port, and a hemisphere type combustion chambers. The fuel jet system is a sequential injection. The supercharging system has the maximum feature. "Double charge" of supercharger (root type of two leaves)+ turbo-charger (HT10). This compound supercharger system is the first in Japan as a car on the market. It extends from the low rotation region to the high rotation region to the whole area, and it can be called an ultimate supercharging system that obtains a high torque and the high response. That is, SC chiefly improves supercharging, a low-speed torque, and the response in the low rotation region where TC doesn't work easily and the acceleration performance of none is drawn out at the time lag. On the other hand, TC brings supercharging in the high rotation region and a charge high torque and the high-power are brought. This both smoothly connect with the by-pass control valve, and demonstrate the effect of supercharging in the maximum.
It is an overwhelming power performance and charm as for the driver. Max power 110ps/6400rpm (NET value) and max torque 13.3kgm/4800rpm. The output for each liter marks indeed 118ps. Moreover, the power weight ratio. (A high performance car in the numerical value in car heavy ÷ output by small the numerical value. About 8.0 : in the sports car type. )Peel 7.0(5MT floor car of ST. R is 6.72. )．
[edit] Inhalation air route of the compound supercharging form
When supercharger operates
- Air cleaner → turbo-charger → supercharger → intercooler → throttle chamber
When supercharger doesn’t operate
- Air cleaner → turbo-charger → by-pass control valve → intercooler → throttle chamber
-Outline of compound supercharging (series installation) operation -
Operation stop with high rotation region → electromagnetic clutch →By-pass control valve (When sc stops with the supercharging pressure control, it opens completely and decrease the inhalation air resistance. )→Intercooler →TC
-Supercharging operation explanation of MA09ERT (concept)-
Supercharger (SC)
- and operating condition
- and operation
- and electromagnetic clutch
- and by-pass control valve
- and operation explanation
- and each Sonorad operation explanation
- (A)→ Bacumutancsonorad
- (B)→ Vacuum control solenoid
- (C)→ By-pass control solenoid
- (D)→ Stopper solenoid
Depressing
- and the gas pedal is few. Low speed and light load region(below inhaling negative pressure about -200Hg)
- and non-operation
- OFF
- and opening completely
The high pressure room of 5 and the by-pass control valve. Pressure opens completely from the low pressure room and because the differential pressure becomes 200mmHg or less high, the by-pass control is opened completely.
- The inhalation air bypasses SC and is sending Co to the engine.
Six, and
- (A)→ Bacumutancsonorad and turning on
- (B)→ Vacuum control solenoid and turning off
- (C)→ By-pass control solenoid and turning on
- (D)→ Stopper solenoid and turning on
Acceleration and high load region, etc. when
- and gas pedal are depressed and supercharging is needed(more than inhaling negative pressure about -200mmHG)
- and operation
- ON (* SC electromagnetic clutch ON condition)
- and close → opening completely
When the differential pressure becomes small before and behind 5 and the throttle valve. The by-pass control valve moves in the direction of the close. Supercharging by SC rises. ( difference before and behind the throttle valve. Pressure close become.
Operation and the gas pedal when being passing are returned and the throttle. When the differential pressure grows before and behind the valve, the by-pass control valve works, and lowers supercharging by SC in the direction of the opening.
Open completely by differential pressure 200mmHG before and behind the throttle valve.
- The supercharging pressure is a setting of the vacuum control valve. When you exceed pressure (atmospheric passage "Close.")
The vacuum control valve operates, and the low pressure room.
The differential pressure grows because it lowers operation.
The by-pass control moves in the direction of the opening, and is SC. It supercharging.. lowers and set pressure is made not to be exceeded.
6.
(A) ON→ON→ON.
(B) OFF→OFF→ON.
(C) ON→ON→ON.
(D) ON→ON→ON.
- and high rotation region (engine 4000 rpm or more)
- and non-operation
- OFF
- and opening completely
It is risk of opening completely of 5 and the by-pass control valve.
It is assumed supercharging only the turbo-charger.
6.
(A)→ ON.
(B)→ ON.
(C)→ OFF.
(D)→ ON.
When the engine starts one
2 and non-operation
3 OFF
4 and opening completely
It is a by-pass short story from the tank of five vacuum as for negative pressure. Paipascontoror in addition to low pressure room of roll Lbalb is opened.
- To the stopper solenoid during the fixed time when it starts And the by-pass control valve were opened.
The amount of the inhalation air when starts is secured.
6.
(A)→ OFF.
(B)→ OFF.
(C)→ OFF.
(D)→ OFF.
Supplementation
- Arrow (→) shows the engine rotational speed rise.
- When the following condition consists, SC electromagnetic clutch "ON" condition.
- "START" Switch OFF
- Slot valve switch (idol point of contact) turning off
- Engine 4000 rpm or less
[edit] Operation explanation of double charge system (details)
- 1. Operating condition
- 2. Sonorad operation(alphabetic mark)
- (A). →Bacumucontororlsonorad.
- (B). → Bacumutancsonorad.
- (C). →Baipascontororlsonorad.
- (D). →Stopparsonorad.
- 3. Operation explanation
When you engine stop start one 2.
(A)→OFF
(B)→OFF
(C)→OFF
(D)→OFF
The lowest inhaling negative pressure before the
- engine stops of three. It straightens it to the vacuum tank.
- Bacu at engine stop or key switch OFF By-pass control negative valve from Mutanc. It controls the by-pass by the negative pressure straightened to the pressure room by (1). The valve is opened.
# (D) is turned off at the same time and the plunger is projection. It maintains it with the by-pass control valve opened. It does. - It is prescribed time like the state of (3) that the engine starts.
(D)Make to OFF, and the by-pass control valve The amount of air when it starts by assuming that it remains is an opening It secures it.
At one low-speed light load 2.
(A)→OFF
(B)→ON
(C)→ON
(D)→ON
3. and supercharger electromagnetic clutch OFF. It bypasses it by the differential pressure size before and behind the slot valve. The control valve is opened completely.
During 1 and low speed at the load 2.
(A)→OFF
(B)→ON
(C)→ON
(D)→ON
3 By-pass control valve opening completely. Supercharger electromagnetic clutch ON
At low inside velocity high load of one 2.
(A)→ turning off or ON
(B)→ ON
(C)→ ON
(D)→ turning on
When 3 and the supercharger exit pressure rise. It is exit pressure. がり、. The supercharger exit pressure rises. By-pass control valve shut exit pressure rise. This operation is repeated.
At low inside velocity high load of one "The turn is increasing." 2､
(A)→OFF
(B)→ON
(C)→ON
(D)→ON
In 3 and the throttle valve opening completely When the differential pressure before and behind the throttle valve is lost By-pass control valve
Because height and the low pressure room pressure become equal The by-pass control valve becomes all closes.
At the inside velocity all loads of one 2.
(A)→ turning off or ON
(B)→ ON
(C)→ ON
(D)→ turning on
The same operation as low inside velocity high load of three
At one high-speed low load 2.
(A)→OFF
(B)→ON
(C)→OFF
(D)→ON
bypass control valve completely open.
- To the high pressure room of the by-pass control valve. The highest Turbocharger pressure is applied.
- It is the atmosphere in the low pressure room of the Bypass control valve.
However, Canada is gotten.
At one high-speed high load 2.
(A)→ON
(B)→ON
(C)→OFF
(D)→ON
By-pass control valve completely open.
- To the high pressure room in the by-pass control valve. The highest turbo-charger pressure is applied.
- To the low pressure room of the by-pass control valve. The intake pressure is applied.
[edit] Remarks
Experience when real car is driven.
When SC operates, it begins to be effective more than 2000 rpm.
(room). It is set up in a sub-meter.
The SC LED indicator.
Lighting and the boost gauge indicator swing, it follows to the gas pedal open close, and it hears of sound "Uwarntsu!", sound "Catitsu!" of SC, and the operation sound in the engine room repeatedly. Next, the change supercharging operation is done to the turbo-charger by 4000 rpm or more while the supplement one's salary with Noboru on rotation number torque improvement and shift operation.
