starting system , LE THANH PHUC

The starting system is a combination of mechanical and electrical parts that work together to start the engine.. The starting system is designed to change the electrical energy, which

STARTING SYSTEM

Le Thanh Phuc

Faculty of Automotive Engineering

Email: thanhphucckd@gmail.com

University of Technical Education

Ho Chi Minh City

1

The starting system is a combination of

mechanical and electrical parts that work

together to start the engine

The starting system is designed to change the electrical energy, which is being stored in the battery, into mechanical energy

To accomplish this conversion, a starter or cranking motor is used

2

Direct-Current Motor Principles

3

Magnetic lines of force flow from the

north pole to the south pole

Direct-Current Motor Principles

4

Interaction of two magnetic fields

Direct-Current Motor Principles

5

Conductor

movement in a

magnetic field

Direct-Current Motor Principles

6

Simple electromagnetic motor

Direct-Current Motor Principles

Direct-Current Motor Principles

Direct-Current Motor Principles

Direct-Current Motor Principles

10

Wave-wound armature

Direct-Current Motor Principles

11

Field coils mounted to

the inside of starter

housing

Magnetic fields in a 4-pole

starter motor

Direct-Current Motor Principles

12

Direct-Current Motor Principles

13

Direct-Current Motor Principles

14

Direct-Current Motor Principles

15

One-way clutch

Direct-Current Motor Principles

16

Starting circuit

Direct-Current Motor Principles

17

Starting circuit

Characteristic of the starter motor

Speed characteristic of the starter motor: n = f (I)

v l B

e 

60

l n D

B

30

.

n a

NP e

a

N

60

E

n

e ng

ng

C

R I

U

E C

E

n      

ng

C

R I

U

E C

E

  KI

I K

C

R I

U

E n

e

ch

.

R a

K C

U

E a

Large load

n = b 1 –b 2 DI

Moment characteristic of the starter motor: M = f (I)

M = FD/2

F = N.Df

a

B.D l.D I B.D l.D i

f

2





I C

M

I l

B a

N

P M

M

.

.

D

x

a 2

P

I

l B

N M

2

D x

a 2

I

l B

N M









M  M 

.

e

ng M

C

E I

C

a PN

E I

a

PN

60

30

.

E I

P  0   ch  2 

0 max ch nm

p

I R

   

 R  R

U

E R

2 0

max

2 2

max

P1 = P2 +  Pñ +  Pck +  Pt



Io Inm/2 Inm

P P  I  E0   Uch   I 2  R

Starter safety switch circuit

Ignition

relay

 www autoshop101.com

 Barry Hollembeak, Automotive Electricity

and Electronics 5 th edition, Delmar Cengage

Learning 2011

 Đỗ Văn Dũng, Hệ thống điện động cơ và

điều khiển động cơ, NXB Đại học Quốc gia

TP Hồ Chí Minh 2013

39