Opel Frontera UBS. Manual - part 1309

 

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Opel Frontera UBS. Manual - part 1309

 

 

QOS III PREHEATING SYSTEM 6D6 – 1

PAGE

General Description ........................................................................................................ 6D6- 1

System Diagram .............................................................................................................. 6D6- 2

GENERAL DESCRIPTION

QOS III preheating system features a quick-on glow
plug with thermometer control of the glowing time
and the afterglow time function.

The system consists of a controller, indicator lamp,
thermosensor, vehicle speedsensor, dropping
resistor, relay (2 pcs), and temperature self-control
type glow plug (4 pcs).

With the employment of the thermosensor, the
glow time changes according to the engine coolant
temperature, thus allowing optimum starting
conditions to be obtained.

The afterglow time function is controlled by
thermosensor, vehicle speed sensor, and the
engine runstall sensor (charge relay).

SECTION 6D6

QOSIII PREHEATING SYSTEM

CONTENTS

SECTION

6D6 – 2 QOS III PREHEATING SYSTEM

SYSTEM DIAGRAM

WIRING DIAGRAM

ON

B

ST

G

low relay No.1

Starter SW

Battery

Engine

Glow relay No.2

Glow indicator

Charge
relay

Glow plug

Thermo
sensor

Controller;
QOS-III

Speed sensor

Dropping
registor

QOS III Timing Chart

ST

ON

OFF

ON

OFF

ON

OFF

ON

OFF

18Km/h

9km/h

ON

OFF

ON

OFF

ON

OFF

Starter SW

Starter SW is turned to
“ST” before indicator light
goes out.

Starter SW is turned to
“ST” after indicator light
goes out.

Starter SW
is left “ON”

Indicator timer

After glow timer

Charge relay

Indicator light

Relay 1

Relay 2

Above

Vehicle speed below

t i

t i

t i

t a

t a

t d

t d

t d

t d

Glow plug
temperature

0

t

0

t

0

t

: Indicator light “ON” time
: Rapid after glow (Delay timer) time
: After glow time

ti
td
ta

(For broken lines, 
water temperature 
is 70

°

C or above)

QOS III PREHEATING SYSTEM 6D6 – 3

QOS III FLOW CHART

6D6 – 4 QOS III PREHEATING SYSTEM

QOS III BLOCK CHART

“ST” detection

“ST”

Indicator timer

11

1

“ON”

“ST”

“ON”

13

td

Delay timer

°

C

td

°

C

Reset

Reset

5

ta

Afterglow timer

Coolant temperature sensor

70

°

C

All reset

12

Vehicle speed detection

9 Km/h

18 Km/h

Complete combustion detection

STALL

RUN

Set

8

4

9

6

10

Thermo-sensor

Speed sensor

Generator

Charge relay

Glow relay No. 1

Glow lamp

(12V, 3.4 W)

Glow relay No. 2

Glow plug

Battery 12V

Starter SW

“OFF” “ST”

“ACC”“ON”

:  Indicator lamp light – up time

:  Quick afterglow time

:  Afterglow time

ti

td

ta

7

2

3

Dropping
register

 

 

 

 

 

 

 

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