Mazda SPEED6 2007 Spezifikationen PDF herunterladen (Seite 33)

CONTROL SYSTEM [LF]

01-40–2

Determination of Effective Injection Time

• The PCM divides the engine operation conditions into control zones according to engine speed and engine

load and determines the effective injection time at each control zone to perform optimum air/fuel ratio control in

all engine driving ranges.

Start zone

Purpose

• Improved engine startability

Operation condition

• When engine speed is 500 rpm or less.

Determination of fuel injection time

• According to engine coolant temperature (ECT sensor) and engine speed (CKP sensor)

Feedback Zone

Purpose

• Improved fuel economy

• Improved exhaust gas purification

Control condition

• During engine operation other than high load volume increase zone and engine start zone.

Determination of fuel injection time

• During normal driving, the amounts of various correction types are added to the basic injection time to set to

the theoretical air/fuel ratio.

High load volume increase zone

Purpose

• Improved driveability

• TWC protection

Control condition

• Either the charging efficiency or the throttle valve opening angle is a fixed value or more.

Determination of fuel injection time

• Corrections are added to the basic injection amount and the high load coefficient is calculated according to the

engine speed, mass intake airflow amount and the throttle valve opening angle.

Excessive speed fuel cut zone

Purpose

• Engine protection

Control conditions

• When the engine speed is 7,000 rpm or more (WOT).

• When engine speed is 5,500 rpm or more and the engine coolant temperature is approx. -15 °C {5 °F} or less.

• When the following conditions continue for 5 min or more:

— Vehicle is stopped.

— Engine speed is 1,500 rpm or more.

— Engine coolant temperature is approx. 40 °C {104 °F}.

• When the following conditions continue for 2 min or more:

— Vehicle is stopped.

— Engine speed is 3,000 rpm or more.

— Engine coolant temperature is approx. 40 °C {104 °F}.

START

ZONE

FEEDBACK ZONE

HIGH LOAD VOLUME

INCREASE ZONE

EXCESSIVE SPEED

FUEL CUT ZONE

DECELERATION

FUEL CUT ZONE

INTAKE AIR AMOUNT

LARGE

ENGINE SPEED

HIGH

amxuun0000003

3404-1U-05F(01-40).fm 2 ページ２００６年７月３日　月曜日　午前９時５１分

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 74 75

Kommentare zu diesen Handbüchern

Keine Kommentare

Mazda SPEED6 2007 Spezifikationen Seite 33

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Autos Mazda SPEED6 2007