electronic control unit standards

7/27/2019 Electronic Control Unit Standards

1/14

STANDARD SPECIFICATION FOR ELECTRONIC CONTROL UNITSSK-E

(PCB + mechanical) Environmental requirements for automotive application-car body installation-

From Our Reference Telephone Facsimile Schwieberdingen

K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 1 of 14

Robert Bosch GmbH reserves all rights even in the event of industrial poperty. We reserve all rights of disposal such as copying and passing onto third parties.

W6 82 5.00

This specification includes the environmental conditions for electroniccontrol units with printed circuit boards applied in automotive car bodyinstallations (passenger compartment, engine compartment).

The test severity referenced represents the requirements as defined in theSTANDARD SPECIFICATION TEAM.

Connectors (including supplied connectors) are tested and evaluated.

date changes prepared by checkedK8/EKM5

07.07.1994

09.09.1994

14.09.1994

13.12.1995

20.05.1997

Initial release

Items: 1.1, 1.2, 1.3, 2.2.2, 3.1 and 4.0

Item: 1.1; page 13

Items: 1.1 and 3.1; page 10 and14

translated and formal redesign

auth. Mnch

auth. Mnch

auth. Mnch

auth. Mnch

auth. Mnch

auth. Mller

auth. Mller

auth. Mller

auth. Mller

auth. Kraft


2/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 2 of 14


W6 82 5.00

0. TABLE OF CONTENTS

1. Temperature resistance and electrial endurance

1.1 Operating temperature1.2 Storage temperature1.3 Temperature cycling (shock)1.4 Temperature cycling endurance (practical)1.5 High temperature endurance

2. Climatic and chemical resistance

2.1 Climate restistance

2.1.1 Passenger compartment

2.1.1.1 Humidity test2.1.1.2 Industrial climates2.1.1.3 Salt mist test

2.1.2 Engine compartment

2.1.2.1 Humidity test2.1.2.2 Industrial climates2.1.2.3 Salt mist test

2.2 Chemicals restistance

2.2.1 Passenger compartmentnot forseen


2.2.2.1 Resistance to fuel2.2.2.2 Resistance to diesel fuel

2.2.2.3 Resistance to engine oil2.2.2.4 Resistance to decalcifying agents

3. Mechanical resistance

3.1 Broadband noise3.2 Shocks3.3 Freefalls

4. Type of protection

4.1 Passenger compartment

4.2 Engine compartment


3/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 3 of 14


W6 82 5.00

5. Notes on connectors

6. Standard inspection procedure

6.1 Engine compartment (sealed version)6.2 Passenger compartment (non-sealed version)

1. Temperature resistance and electrical endurance

1.1 Operating temperature

ECU ambient temperature, active (Tu): -40C / +70CECU inside air temperature, upper limit (Ti): +85C (standard)

The above limits apply for one vehicle life-time.

Supplementary conditions:For conditions anticipated to exceed the limiting

values, Rth =(Ti-Tu)/Pv 1.5 K/Wappropriate measures are to be jointly agreed upon,e.g. - use of heatsinks,

- provisions for convection,- reduction of power loss,- use of higher-specified components (costs)

Mounting position: customer-specific, to be determinedOperating conditions: ECU-specific, to be determined

1.2 Storage temperature (passive)

A storage temperature of max.+90C for short periods ispermissible.

1.3 Temperature cycling (shock)

Standards: DIN-IEC 68-2-14 NaDIN 40 046 sh. 14RB N42 AP 216

Temperature range: -40C ...+90C

Transition time: max. 10 sec.Soak time at max. temperatures: * min. 15 minutes* (upon attainment of temperature environment)


4/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 4 of 14


W6 82 5.00

test duration: 100 temperaturecyclesOperation mode: passive

1.4 Temperature cycling endurance test TWDL

Standards: DIN-IEC 68-2-14 Nb

Temperature range: -40C to +85C

Variation of temperature: = 4,3 min.Test duration: 500 temp.-cyclesOperation conditions: operating during

temperature-riseand upper temperature

Note: The input signals applied during electrical operation mustbe inside the specified ranges and representative ofpractical applications.

Test details: see page 14

1.5 High temperature enduration

Standards: DIN-IEC 68-2-2DIN 40 046

Inside air temperature: Ti = 85C(higher if necessary under consideration ofthe respective upper operating temperaturesof the components).

Test duration: 1500 hrsOperation mode: continuous operation

Note: The input signals applied during electrical operation must

be meaningful inside the specified rangesand representative of practical applications.

2. Climate and chemical resistance

To be tested with connected harness connector.

2.1 Climate resistance

2.1.1 Passenger compartment


5/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 5 of 14


W6 82 5.00

2.1.1.1 Humidity test

Standards: DIN-IEC 68-2-30 Db

Test severity: variant 2, +55CTest duration: 9 cyclesOperation mode: intermittent supply

voltage,1 hr. on / 1 hr. off(standby mode)

2.1.1.2 Industrial climates

Standards: DIN 50 018 - KFW 0.2 S

Test duration: 2 cyclesOperation mode: passive

2.1.1.3 Salt mist test

Standards: DIN 50 021 - SS (5 % NaCl)

Test duration: 8 hrsOperation mode: passive


2.1.2.1 Humidity test

See item 2.1.1.1

2.1.2.2 Industrial climates

Standards: DIN 50 018 - KW 2.0 S

Test duration: 2 cyclesOperation mode: passive

2.1.2.3 Salt mist test

Standards: DIN 50 021 - SS (5 % NaCl)

Test duration: 144 hrsOperation mode: passive


6/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 6 of 14


W6 82 5.00

2.2 Chemicals resistance

2.2.1 Passenger compartment test not forseen


2.2.2.1 Resistance to fuel

Description of test cycle:Spraying with gasoline fuel, duration: 5 sec.Storage at Tu = Rt, duration: 48 hrs

Test duration: 4 cycles

2.2.2.2 Resistance to diesel fuel

Description of test cycle:

Spraying with diesel fuel, duration: 5 sec.

Storage at Tu = 80C, duration: 24 hrs


2.2.2.3 Resistance to motor oil

Description of test cycle:Spraying with motor oil (SAE 10 W40],duration:5 sec.Storage at Tu = 80C, duration: 24 hrs


2.2.2.4 Resistance to decalcifying agents

Description of test cycle:

Storage at Tu = 80C, duration: 1 hrSpraying with decalcifying agent(Henkel P3), duration: 5 sec.


Subsequent water spray test (immediate) inaccordance with N42 AP 315: IP X4 K


7/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 7 of 14


W6 82 5.00

3. Mechanical resistance

3.1 Broadband noise

Frequency range 10 ... 1000 HzAcceleration density spectrum: see page 12

Effective value of total acceleration: 33 m/sAcceleration density at 10 Hz: 20 (m/s )2/Hz

30 Hz: 20 (m/s )2/Hz 200 Hz: 0.5 (m/s )2/Hz 1000 Hz: 0.1 (m/s )2/Hz

Test duration per main axis: 8 hrs(new parts are to beused for eachdirection)ambient temperature(passive) -40/+85C,1 cycle 8 hrs

Operation mode: active (0.5 hr afterend of test)

Test details: see page 12Temperature-function test: see page 13

3.2 Shocks

Standards: DIN IEC 68-2-27DIN 40 046 sh. 7

Shock acceleration: 400 m/sDuration of nominal shock: 11 msShock form: semisoidal

Number of shocks: 18 (3/direction)

3.3 Freefalls

Standards: DIN-IEC 68-2-32 EdRB Y 261 R20 004

Fall impact: concreteFall height: 1 mNumber of fall: 2 / ECUNumber of samples: 3

By the use of 3 samples, all 6 possible directions of load can be

tested.(A) + (C), (B) + (C-), (A-) + (B-)


8/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 8 of 14


W6 82 5.00

Evaluation criteria:

The test is considered passed when,

- the control unit shows definite signs of visible damage and theunit would be designated as being defective

- there are no obvious defects visible to the control unit or itscomponents, and the functions are fully assured.

4. Type of protection

Test without attachment of dummy harness connector underconsideration of the permissible installation positions inaccordance with the offer drawing.

To be tested for new connection systems.

Standard: DIN 40 050 sh. 9 (May 93).

4.1 Passenger compartment

Ventilation via cable harness or

housing/lid opening without sealing elements.Degree of protection: IP 50

(B-) (A-)

(C-)

A B

C

A B

C


9/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 9 of 14


W6 82 5.00

4.1.1. Dust

Standards: DIN 40 046 sh. 48RB N 42 AP 310

Test duration: 10 min.

Dust concentration 5 g +2g/m3

Ambient temperature: 25C

4.2 Engine compartment

Water spray (increased pressure)

Ventilation via pressure compensation element

Degree of protection: IP 54 K

Test using revolving pipe

Test duration: 10 min.Mains pressure: 400 kPa

Water temperature: room temperature

5. Notes on connectors

The connections developed by RB are tested and approved by thedevelopment departments responsible. In addition, evaluations ofthe connection systems are conducted within the scope of equipmentand system testing.

For connectors from outside sources (connector is prescribed by thecustomer --> no RB-connector), the approval testing must be

conducted by the supplier of theconnectors and documented within the scope of evidential testing(Test Reports). In addition, these connectors are subjected to areduced evaluation (e.g. abrasion, contact, sealing....) withinthe scope of equipment testing.

As a matter of principle, the connector must comply with thecontrol unit specification.

6. Standard inspection procedure


10/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 10 of 14


W6 82 5.00

6.1 Engine compartment (sealed version)

InitialTesting(electrical)1.)/Visualinspectio

n

Numberofsamples:17+

10D

Temperaturec

ycling

(Item1.3

)

86D

finaltesting(electrical)1.)/Visualinspection

17+10D

Resistanceto

C

hemicals

(Item2.3.2)

Tem

p.-Storage

(Item2.3.2)

Wate

rresistance

(

Item4.2)

4D

Temperature

cycling

endurance

(Item1.4)

3

Saltmis

ttest

(Item2

.1.3)

1D

Broadband

noisetest

(Item3.1)

6

Temperature

characterisation

(Item3.1)

6

Waterresistance

(Item4.2)

4D

1.)=at-40C,

Roomtemperature,

+85C

D

=Dummies

Shocks

(Item3.2)

1

Industrial

climate

(Item2.1.2)

1D

Freefalls

(Item3.3)

High

temperature

endurance

(Item1.5)

3

3

Huniditytest

(Item2.1.1)

1


11/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 11 of 14


W6 82 5.00

6.2 Passenger compartment (non-sealed version)

InitialTesting(electrical)1.)/Visualinspec

tion

Numberofsamples:

19

Temperaturecycling

(Item1.3)

10

finaltesting(electrical)1.)/Visualinspection

1

9

Dustresistance

(Item4.1)

1

Tem

perature

c

ycling

en

durance

(Item1.4)

3

Saltmisttest

(Item2.1.3)

1

Broadband

noisetest

(Item3.1)

6

Temperature

characterisation

(Item3.1)

6

Humiditytest

(Item2.1.1)

1

1.)=at-40C,Roomtemperature,+85C

Shocks

(Item3.2)

1

Indus

trial

clim

ate

(Item2.1.2)

1

1

Freefalls

(Item3.3)

3

High

temperature

endurance

(Item1.5)

3


12/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 12 of 14


W6 82 5.00

Standard housing SK-EBroadband noise test

1. Test conditions

2. Test duration: 8 hrs per compartment direction(new parts to be used for eachdirection)

3. Number of test samples: 6 (2 pieces per direction)4. Environmental temperature

(passive): -40 / 85C (1 cycle: 8 hrs)

5. Operation mode: passive (during testing)active (0.5 hr after end of test)

Environmental temperature

soak time atT = 85C: 1.5 hrs

soak time atT = -40C: 0.5 hrs

electrical operation after end of test:top of vibration table openedECU with vibrational load,ECU cools down to room temperature:

Tu = RT + 65C

6. Test frequency 10 ... 1000 Hz

0,01

0, 1

1

10

10 0

1 10 100 1000

Frequency in Hz

Poweraccelerationdensityin(m/s)/Hz

85C

RT

-40C

0C

0h 4,5h 8hZeit


13/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 13 of 14


W6 82 5.00

ECU testingTemperature-function test

Objective:

to detect possible errors within a "temperature window"

Note:

Warming of component during t1 to be kept as low as possible


14/14




K8/EKM5 Mnch (07 11) 8 11- 1323 (07 11) 8 11- 3803 20.5.1997

Y 280 P61 148 page 14 of 14


W6 82 5.00

20

0

-40

-20

40

60

80

Soak time

Soak time

ECUinside

airtemperatureinC

el.Operation

Off

On

Number of temperature cycles

500

1 Test cycle

t > 30 min.(at Ti=+85C)

t > 30 min.

(at Ti=-40C)

t=2...4h (depending on ECU type)

temperature gradient : 3,5 - 5 K/min

electronic control unit standards

Documents