Our cars run a batch injection fuel setup or is it just sequential injection?

 

I believe that the EVO has batch fuel injection.
If read the EVO encyclopedia article:

https://www.evolutionm.net/features/...t=lanevo&id=20

It states that the EMS is "multi-point" fuel injection.
If the EMS was sequential, it would have stated so.
Now, if it's 2 cylinder batch or 4 cylinder batch, I'm not sure.

Anybody else confirm or deny?

 

i believe it's sequential.


by multi-port, i believe they mean that there is an injector for each cylinder in the intake manifold in contrast to throttlebody injection or gas-direct injection.

 

Cool diagram.
But I don't know how you made the conclusion tha the injection is sequential from the electrical schematic. Even though it looks like that have the ability to independently fire each injector, they can still choose to fire them in batch mode.

Do you have the factory repair manual? Does it say anywhere in it, whether the injection is sequential or batch?

Oh, where'd you get your manual anyway?

 

some text from my repair manual (got a cd from ebay):

GENERAL DESCRIPTION
M1131000100370
.The Multiport Fuel Injection System consists of sensors,
actuators and the engine control module (ECM)
<M/T> or powertrain control module (PCM) <A/T>.
The sensors detect the engine condition. The module
controls the system based on signals from these
sensors. The actuators work under the control of the
ECM <M/T> or PCM <A/T>. The ECM <M/T> or
PCM <A/T> carries out activities such as fuel injection
control, idle air control, and ignition timing control.
In addition, the ECM <M/T> or PCM <A/T> is
equipped with several diagnostic test modes which
simplify troubleshooting when a problem develops.
.
FUEL INJECTION CONTROL
The ECM <M/T> or PCM <A/T> controls injection
drive times and injector timing to supply the optimum
air/fuel mixture to the engine according to the continually-
changing engine operation conditions. A single
injector is mounted at the intake port of each cylinder.
The fuel pump supplies pressurized fuel from the
fuel tank to the fuel injectors. The fuel pressure regulator
controls the fuel pressure. Thus, the regulated
fuel is distributed to each injector. Fuel is normally
injected for each cylinder every two rotations of the
crankshaft. The firing order is 1-3-4-2. Each cylinder
has a dedicated fuel injector. This is called "multiport".
The ECM <M/T> or PCM <A/T> provides a
richer air/fuel mixture by carrying out "open-loop"
control when the engine is cold or running under high
load conditions. Thus, engine performance is maintained.
In addition, when the engine is under normal
operating temperature after warming-up, the ECM
<M/T> or PCM <A/T> controls the air/fuel mixture
according to the heated oxygen sensor signal. This
control is a "closed-loop" control. The closed-loop
control achieves the theoretical air/fuel mixture ratio
where the catalytic converter can obtain the maximum
cleaning performance.
.
IDLE AIR CONTROL
The engine control module controls the amount of air
that bypasses the throttle valve according to
changes in idling conditions and engine load during
idling. Thus, idle speed is kept at an optimum speed.
The ECM <M/T> or PCM <A/T> drives the idle air
control (IAC) motor according to engine coolant temperature,
A/C, and other electrical load. Thus, idle
speed is kept at an optimum speed. In addition,
when the A/C switch is turned off and on while the
engine is idling, the IAC motor adjusts the throttle
valve bypass air amount. Thus, idle speed is maintained
at constant speed regardless of various
engine load conditions.
.
IGNITION TIMING CONTROL
The ignition power transistor located in the ignition
primary circuit turns on and off to control primary current
flow to the ignition coil. This maintains ignition
timing at an optimum level regardless of various
engine operating conditions. The ECM <M/T> or
PCM <A/T> determines the ignition timing according
to engine speed, intake air volume, engine coolant
temperature, and atmospheric pressure.
.
DIAGNOSTIC TEST MODE
• When a fault is detected in any of the sensors or
actuators related to emission control, the Malfunction
Indicator Lamp (SERVICE ENGINE
SOON) illuminates to warn the driver.
• When a fault is detected in one of the sensors or
actuators, a diagnostic trouble code corresponding
to the fault is stored in the ECM <M/T> or
PCM <A/T>.
• The RAM data inside the ECM <M/T> or PCM
<A/T> that is related to the sensors and actuators
can be read with the scan tool. In addition, the
actuators can be controlled by the scan tool MUTII
(MB991502) under certain circumstances.

 

i dont see anything related to batch or sequential in my repair manual - sorry

 

its because each injector has it's own line to the ecu. had it been batch fire, 2 injectors would come from the same pinout.

 

You're right.
Thanks. I should have figured that one out.

Does anyone have any technical information for the engine management strategies used for the EVO?

I'm a controls guy, and would be really interested in learning more about the EVOs engine management system.

 

Cool. How much was your CD off of Ebay?