发电机与蓄电*ヅ

发布时间:2021-10-18 15:49:18

Volvo Bus Corporation
Gothenburg, Sweden

Bodybuilding Instruction Buses and coaches
Sect. Group No Date

3

0

19

060518

Electrical power consumption Applies to all models
3-0-19Electrical power consumption060518

General
Current drain must be limited during idling and when the engine is switched off, to increase the service life of the batteries. For this reason, the body builder must dimension the body electrical system using the tables below for guidance.

Action
Idling Chassis current drain is shown in the table below 1. The values apply to idling at 600 rpm unless otherwise specified. If the outdoor temperature is greater than -5°C, it is possible to ignore the current needed to heat the AdBlue hoses. Chassis current requirements Current required for heating the AdBlue hoses at temperatures below -5°C (Euro 4 engines) 10A 20A 28A 25A 19A Current required for pump sensors etc. when the SCR system is used (Euro 4 engines) 10A 10A 10A 10A 10A Current required for battery charging, control units, instrument lighting etc. 20A 20A 20A 20A 20A

Bus model

B7R B7LE B9L B9TL B9S B12B 6x2 B12B 4x2 B12M B12MA

Table 1. Chassis current requirements 3-0-19 R01 Max current consumption at idle ? At idle, the total current consumption for the body and chassis together must not be greater than the charge received by the batteries, please refer to the table 2. NOTE! The charge values in the table must therefore be reduced by the current requirement in table 1. In exceptional cases, short term loading on the batteries can be permitted, however.

NOTE! At low idling speed, the charging capacity falls dramatically.

1 (10)

Bodybuilding instruction Buses and coaches

Sect.

Group

No

Date

3

0

19

060518

Model

Alternatora

Ratio

Charge current at idle (600 rpm) 60 A 120 A 160 A 92 A

Total charge current at idle

Charge current at ambient temperature 90?C 25?C 25?C 90?C Engine mounted

B7R/ B7RLE MkII

80 A 2x80 A 2x110 A

1:4.5 1:4.5 1:4.5 1:3.3

B7R/ RLE MkIII B7L

2x100 A

115 A 140 A 180 A 140+80 A

1:2.8 1:2.8 1:2.8 1:2.8 and 1:3.7 1:2.9 1:2.9 1:2.9 1:5.2 1:5.2 1:5.11

105 A 100 A 135 A 150 A 105 A 100 A 135 A 108 A 156 A 78 A

---

25?C

Idle speed for B7L and B7TL is 700rpm

B7TL

115 A 140 A 180 A

B9L

2x80 A 2x110 A 110 A

90?C 234 A 90?C

2x80 engine mounted 110 engine mounted Mounted on AC compressor

B9TL

2x80 A 2x110 A

1:5.2 1:5.2

108 A 156 A 219 A

90?C 90?C

2x80 engine mounted 2x110 engine mounted 110 on auxiliary bridge

110 A

1:4

63 A

2x180 A

1:2,9

230 A

---

25?C

Table 2. Max current consumption at idle

2 (10)

Bodybuilding instruction Buses and coaches
Charge current at idle (600 rpm) 108 A 156 A Total charge current at idle

Sect.

Group

No

Date

3

0

19

060518

Model

Alternatora

Ratio

Charge current at ambient temperature 90?C 90?C 2x80 engine mounted 2x110 engine mounted 2x80 auxiliary bridge 2x110 auxiliary bridge 3x110 auxiliary bridge 2x80 engine mounted 3x80 engine mounted 2x110 engine mounted 3x110 engine mounted 3x80 auxiliary bridge 3x110 auxiliary bridge

B9R

2x80 A 2x110 A

1:5.2 1:5.2

B9S

2x80 A

1:3.9

88 A

90?C

2x110 A

1:3.9

110 A

90?C

3x110 A

1:3.9

165 A

90?C

B12B

2x80 A 3x80 A 2x110 A

1:4.44 1:4.44 4.44

100 A 150 A 140 A

90?C 90?C 90?C

3x110 A

4.44

209 A

90?C

B12M

3x80 A

4.48

150 A

90?C

3x110 A

4.48

209 A

90?C

Table 2. Max current consumption at idle
a. Compact alternators: 80 A, 110 A

3 (10)

Bodybuilding instruction Buses and coaches

Sect.

Group

No

Date

3

0

19

060518

Engine stopped The table below shows examples of how various current drains affect the batteries when the engine is shut off, such as at a terminus. The tables also show how long the bus needs to be driven before the batteries are fully charged again. The values in the table are specified for about 20°C. NOTE! In cold climates, there must be much longer recovery time. Current drain from the batteries 10A 10A 10A 30A 30A 30A 50A 50A 50A Time in min 10 20 30 10 20 30 10 20 30 Driving time in min to recharge the batteries to full charge 16 32 48 48 96 144 80 160 240

Definitions
Electric balance is defined as the relationship between current produced and current consumed per minute. This relationship can also be expressed by specifying a margin between current produced and current consumed per minute. See figure (1). Producer: Load: Margin: Ip Ic Im

Str?m/ current (A)

Ip Ic

Marginal / Margin Im

Figure 1

Ip Current, produced Ic Current, consumed
4 (10)

Bodybuilding instruction Buses and coaches

Sect.

Group

No

Date

3

0

19

060518

Electric balance
The purpose of electric balance is: - Avoid consumption from the starter battery when the engine is running and electrical loads are activated. - Ensure that the required current for starting the engine is available. - Avoid too low voltage level when the engine is turned off and electrical loads are activated. Starter batteries - service life Life span for starter batteries is directly dependant on the current consumption level they are exposed to. Starter batteries - recharging When a starter battery supplies a load, the recharging capacity depends on: - Current, consumption level - Consumption time - Outdoor temperature Current, consumption level Recharging upper level is about 10 Ampere. Consumption time Recharging time is 1.6 times the consumption time for outdoor temperatures of 20? C. Outdoor temperature Low outdoor temperatures, -20 ?C, gives recharging time 3 x 1.6= 4.8 times consumption time. Estimated recharging time Consumption: X Ampere Time, recharging: Time, consumption: Temperature factor: tre Minutes tco Minutes f 1.6 ≤ f ≤ 4.8 Minutes

Xt re = ----× f × t co 10

5 (10)

Bodybuilding instruction Buses and coaches

Sect.

Group

No

Date

3

0

19

060518

Generation / load
The relationship Ip ≥ Ic + Im shall be performed for all engine speeds. Ip is determined at the engine idling speed, 550 rpm for Euro 3 engines and 600 rpm for Euro 4 engines, if no other idling speed is specified. Ic is determined in the check list below. The margin, Im is determined at the engine idling speed and concerns loading capacity for starter batteries as well as instrument lighting. Im, city buses Im = 20 A. 0 A. Im, long distance buses Im =

Producent / Producer

Batteri / battery

Ip Im

Im

Ic

F?rbrukare / consumer

Ic

Figure 2

Connection 3-0-19 R02 Connection of electrical loads ? ? ? Connection of electrical loads shall be performed so that: Current supply for safety related functions shall have priority to other loads. Too low voltage level in starter battery is avoided, when the engine is turned off and electrical loads are activated. Safety related functions are not affected by this requirement.

6 (10)

Bodybuilding instruction Buses and coaches

Sect.

Group

No

Date

3

0

19

060518

Check list for electric balance analysis
No Load Number Nominally Ampere A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 External lighting Headlamp, low beam Headlamp, high beam Headlamp, spot lamp Headlamp, curvature Headlamp, front fog lamp Headlamp, passing light Headlamp, reverse light Headlamp, operating light Headlamp, rear door light Headlamp, miscellaneous Lamp, tail light Lamp, position light Lamp, parking light Lamp, width marking light Lamp, identifying light Lamp, day running light Lamp, side marking light Lamp, stop light Lamp, number plate light Lamp, rear fog light Lamp, direction indicator Lamp, miscellaneous Degree of utilisation % Estimated consumption Ampere

B 1 2 3 4 5

Lighting, interior Roof light, 1/1 Roof light, 1/2 Roof light, driver Roof light, night Roof light, reading lamps

7 (10)

Bodybuilding instruction Buses and coaches
No Load Number Nominally Ampere 6 7 8 9 10 11 12 13 14 15 16 17 18 C 1 2 3 4 5 6 7 D 1 2 3 4 5 6 7 8 9 10 Lighting, floor Lighting, instrument Lighting, guide Lighting, lavatory Lighting, pantry equipment Lighting. destination plate front Lighting. destination plate side Lighting, number plate Lighting, stop plate Lighting, drivers cabin Lighting, luggage compartm. Lighting, engine room Lighting, miscellaneous Sight facility Windscreen wiper Windscreen washer Headlamp, wiper and washer Electrical heating, window Electrical heating, mirror Electrical window lift Sight facility, miscellaneous Communication Horn Radio Video TV-monitor Mobile telephone Radio communications Telefax Computer Advertising plates Communication, miscellaneous

Sect.

Group

No

Date

3

0

19

060518

Degree of utilisation %

Estimated consumption Ampere

8 (10)

Bodybuilding instruction Buses and coaches
No Load Number Nominally Ampere E 1 2 3 4 5 6 7 8 9 10 11 12 Fans Fan, air floor Fan, air driver Fan, air doors Fan, defroster Fan, ventilation 1/3-speed Fan, ventilation 1/2-speed Fan, ventilation 1/1-speed Fan, air condition Fan, air condition, driver Fan, pantry Fan, lavatory Fan, miscellaneous

Sect.

Group

No

Date

3

0

19

060518

Degree of utilisation %

Estimated consumption Ampere

F 1 2 3 4 5

Pumps Heat water Auxiliary heater Air condition Lavatory Pump, miscellaneous

G 1 2 3 4 5 6

Service Refrigerator Coffee making machine Water heater Stove Furnace Service, miscellaneous

9 (10)

Bodybuilding instruction Buses and coaches
No Load Number Nominally Ampere H 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Other systems Electrical system, components El.- air pre-heater or glow plug Electrical diesel control, EDC Easy gear shift, EGS Anti lock brakes, ABS Electronic control air suspension, ECS Air dryer Retarder, hydraulic Retarder, electromagnetic Ticket vending machine Electrically operated doors Hoist for disabled Electrically operated ramps AdBlue-pump AdBlue hoses, heating

Sect.

Group

No

Date

3

0

19

060518

Degree of utilisation %

Estimated consumption Ampere

Summary
Current, total produced Current, total consumed Margin If Im < 0: Estimated recharging time Ip Ic Im Ampere Ampere Ampere ______ - _______ = _______ ______

tre

Xt re = ----× f × t co 10

Minutes ______

Requirement list
Requirement number 3-0-19 R01 3-0-19 R02 Requirement heading Max current consumption at idle Connection of electrical loads Page 1 6
10 (10)


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