AU2021101185A4

AU2021101185A4 - Improved energy-saving starter with one-touch start function and its control method

Info

Publication number: AU2021101185A4
Application number: AU2021101185A
Authority: AU
Inventors: Changhui Chen; Lijuan Chen; Beke Dezso; Peihui Shen; Xianbin Wang; Tie Xu; Wei Zhang; Qixiang Zhu
Original assignee: Fujian Chuanzheng Communications College
Current assignee: Fujian Chuanzheng Communications College
Priority date: 2020-11-24
Filing date: 2021-03-05
Publication date: 2021-05-06
Anticipated expiration: 2029-03-05
Also published as: CN112228264A

Abstract

The present invention proposes an improved energy-saving starter with one-touch start function and its control method, it comprises: a starting switch module, a compound relay module, a starting module and a reset module; said starting switch module comprises a starting switch, a 5 contactor and a timing switch; said compound relay module consists of a first relay and a second relay; said starter module comprises: a permanent magnet, a reset spring, a main terminal, a contact disc, a movable iron core, a suction-pull coil, a DC motor, a brass bushing and a fork mechanism; said reset module comprises return coil. It solves the problem of energy consumption of the holding coil in the prior art, and prevents the problems of unsuccessful starting and 10 complete loss of battery power caused by the unreasonable length of contact time between DC motor and flywheel. 14 1/1 Starting switch I L1 L2 ___J Generator KM Compound Relay Timer KM Suction-pull Return coil Reset spring coil * Adjustment screw Permanent magnet --- _9 Contact dsc Main terminal Brass bushing Positioningpin M Movable Battery iron core Fork FIG. 1 15

Description

1/1

Starting switch I L1 L2 ___J Generator KM Compound Relay

Timer

KM Suction-pull Return coil Reset spring coil

* Adjustment screw Permanent magnet --- _9 Contact dsc Main terminal Brass bushing Positioningpin M Movable Battery iron core Fork

FIG. 1

P/00/009 Regulation 3.2 AUSTRALIA Patents Act 1990

INNOVATION SPECIFICATION FOR AN INVENTION ENTITLED

Invention title: Improved energy-saving starter with one-touch start function and its control method

Name of Applicant: Fujian Chuanzheng Communications College

Address for Service A.P.T. Patent and Trade Mark Attorneys PO Box 833 Blackwood, S.A. 5051

The invention is described in the following statement:

la

Improved energy-saving starter with one-touch start function and its control method

Technical field

The present invention relates to the field of vehicle engineering and electrical equipment, and in

particular relates to an improved energy-saving starter with one-touch start function and its

control method.

Background Technology

Currently, the commonly used starter control system circuits for construction vehicles

(automobiles) comprises: key switch direct control type, starter type with relay and starter type

with compound relay.

These solutions have the following shortcomings:

key switch direct control type in the starting process, because the current through the key switch

and electromagnetic switch is generally more than 35A or higher, the working current is too large,

making the more delicate key switch easy to burn out;

starter type with relay uses the relay principle to control the solenoid switch of the starter,

avoiding the high current through the key switch during starting, making the current size through

the key switch controllable, improving the working environment of the key switch, but not

preventing the phenomenon of the starter gear colliding with the flywheel gear ring due to the

secondary repeated starting.

starter type with compound relay introduces the generator neutral voltage into the compound

relay control method to solve this problem above, but lacks the self-locking function, it may fail to

start properly due to insufficient starting contact time;

at the same time, the common disadvantage of the above three ways is: during the starting

process, the holding coil is used to keep the movable iron core sucking the contact disc to short

the suction-pull coil to make the DC motor start at high speed, however, the holding coil is

connected in parallel with the DC motor to the vehicle battery, the resistance value of the holding

coil is very small (about twice the resistance value of the DC motor), which divides about 1/3 of

the battery current, making the limited capacity of the battery lose power, reducing the

electromagnetic starting torque of the starter about 1/3, reducing the starting performance, so in

the actual application need to increase the size of the starter machinery and equipment or with gear reduction device to increase the starting torque of the starter, increasing the cost of construction vehicles, the battery is also easy to start again because of the loss of power. At the same time, the lack of self-protection function and the unreasonable starting contact time caused by equipment failure lead to a series of adverse consequences, such as insufficient starting contact time caused by unsuccessful starting, and when the starter equipment fails, it causes the starting contact time to be too long, resulting in a complete loss of battery power.

Chinese patent CN 104929843 B "an energy-saving starter control system with self-preservation

function" provides a solution, "the use of permanent magnet instead of the original holding coil

improvement, and the use of generator neutral point voltage with the return coil control device

design, solve the energy consumption problem of holding coils in the prior art, and can avoid

adding gear reducer devices or reducing the rated power and external dimensions of the starter,

saving the cost of the starter and the whole vehicle. Also, this system comes with a

self-preservation function and a function to prevent misoperation to start the ignition again, which

extends the service life of the starter, battery and flywheel." The solution partly solved the

problems existing in the prior art, but its own design solution also has some inherent defects and

to be improved, such as more difficult to control the opening time of the starting switch, if the

starting switch is stuck, it will cause the operation of the whole device failure and other problems.

Inventions

In response to the shortcomings of the prior art, the present invention provides an improved

energy-saving starter with one-button start function and its control method, which improves the

prior art, realizes the functions of one-button start and automatic reset under fault condition,

overcomes the defects in the prior art, and makes the starter work more stable and reliable.

The following technical solution is adopted:

an improved energy-saving starter with one-touch start function, characterized in that: it

comprises: a starting switch module, a compound relay module, a starting module and a reset

module;

said starting switch module comprises a starting switch, a contactor and a timing switch; said

compound relay module comprises a first relay and a second relay; said starting module comprises:

a permanent magnet, a reset spring, a main terminal, a contact disc, a movable iron core, a

suction-pull coil, a DC motor, a brass bushing and a fork mechanism; said reset module comprises

a return coil;

said timing switch, the coil of the contactor, the starting switch, the coil of the first relay and the normally closed contact of the second relay are connected in series between the battery and ground as a starting circuit, the two ends of the first normally open contact of said contactor are connected in parallel with the starting switch; said battery is respectively: via the normally open contact of said first relay and the suction-pull coil, and via the main terminal connected to one end of the DC motor, and via the normally closed contact of the contactor connected to the return coil, and then grounded; the other end of the DC motor is grounded; said movable iron core is provided inside the brass bushing and forms a sliding connection with the brass bushing; one end of said movable iron core is connected with the contact disc and the reset spring, and the other end is connected with the fork mechanism; said contact disc and permanent magnet are located on each side of the main terminal; the neutral contact of the generator is grounded via the coil of the second relay, and via the second normally open contact of the contactor respectively: grounded via the return coil, and grounded via the normally closed contact of the contactor and the battery; the output B terminal of the generator is connected to the positive terminal of the battery; said suction-pull coil and return coil are wound on the brass bushing and wound in opposite directions.

Preferably, said fork mechanism adopts a linkage structure; the lower end of said fork mechanism

is connected to the one-way clutch of the starter, and the driving gear of the one-way clutch forms

a separable or engaging fit with the engine flywheel ring; said DC motor is mechanically connected

to the driving gear.

Preferably, when said suction-pull coil and return coil are not energized, said reset spring keeps

the contact disc from contacting the main terminal; when said suction-pull coil is energized, the

permanent magnet exerts a suction force on the movable core; when said return coil is energized,

the permanent magnet exerts a repulsion force on the movable core.

Preferably, said start switch is a key contact switch or an acoustic switch or an infrared induction

switch.

Preferably, when starting the vehicle engine, said starting switch is pressed; the timing switch and

contactor are energized and the first normally open contact of the contactor closes and the

normally closed contact opens; at the same time, the coil of said first relay is energized and the normally open contact of the first relay closes to start, then the battery supplies power to the suction-pull coil and DC motor through the normally open contact of the first relay, after the suction-pull coil is energized, the movable iron core moves under the action of the magnetic force of the suction-pull coil to overcome the restoring force of the reset spring, and the fork also rotates to engage the drive gear of the one-way clutch of the starter with the engine flywheel; until the contact disc is in contact with the main terminal, the main circuit of the starter is connected, the suction-pull coil is shorted, and the full voltage of the battery is added to both ends of the DC motor through the contact disc, at this time the driving gear of the starter and the flywheel ring of the engine are fully engaged under the force of the fork, the torque reaches the maximum, and the DC motor runs at full speed to start the engine; at this time, under the action of the larger suction force of the permanent magnet, the contact disc overcomes the restoring force of the reset spring to absorb the main terminal, instead of holding the coil, to maintain the DC motor full speed start until the end of the engine fully start process.

Preferably, during the starting process, when said starting switch is turned on to start, the timing

switch starts timing:

when the starting is completed within the set timing switch experience time, the engine drives the

generator to generate electricity normally, the generator neutral point voltage is formed and

established, power is supplied to said return coil, the return coil generates magnetic flux and

magnetic force direction opposite to that of the suction-pull coil, causing the movable iron core to

reset, while causing the drive gear to exit engagement, the contact disc disengages from the main

terminal, the main circuit of the DC motor is disconnected, and the starter stops working; at the

same time the generator neutral point voltage supplies power to the coil of the second relay,

causing the normally closed contact of the second relay to open, cutting off the starting circuit;

when the situation of unsuccessful starting occurs within the set timing switch experience time,

said timing switch breaks and cuts off the starting circuit, the starting coil of the first relay loses

power, the normally open contact of the first relay opens tode-energize the suction-pull coil, the

battery energizes the return coil, the movable iron core resets, and the starter stops working.

In the improved embodiment provided by the present invention and the preferred embodiment,

the starter is provided with a starting contactor, which is connected in parallel with the starting switch through its first normally open contact, making the system have a one-button start function, that is, once the starting switch is closed to start, the starter contactor KM will keep the system self-locking, and the DC motor line will stay on and run at full speed until the starting process is completed and finished; the starting switch can use a button, owner's voice control or human infrared induction, etc. to realize the start trigger.

Timing switch can also be set to prevent inexperienced first-time operators from damaging the

electrical equipment of the starter system due to incomplete starting processes caused by

insufficient closing time of the starting switch; as the use of permanent magnet instead of the

original holding coil, nearly 1/3 of the starting energy can be saved, but the contact disc under the

action of the larger suction of in the permanent magnet may produces faults such as tightly

sucking the two main terminals, through the set timing switch experience time control, the

problem of unsuccessful starting caused by a variety of unknown fault can be solved, preventing

the damage of the starter equipment and the occurrence of complete power loss damage of

battery.

Based on the background technology, the permanent magnet is used to replace the original

holding coil, and the feedback battery voltage is introduced by the timing switch with the

contactor, while the neutral point voltage of the generator is automatically controlled with the

return coil, solving the energy consumption problem of the holding coil in the prior art, preventing

the problems of unsuccessful starting and complete battery loss caused by the unreasonable

contact time of the DC motor and flywheel, and improving starting torque and starting

performance of the starter, in the case of the same starting torque, the device system can

miniaturize the shape of the starter or increase the starting torque by about 1/3, and at the same

time, it can avoid the complete loss of battery power caused by long starting time due to various

fault reasons, and improve the starting performance and save the cost of the starter system, at the

same time, the system also has the function of preventing the misoperation of the second start

and ignition, which prolongs the service life of the starter, battery and engine flywheel and other

related equipment.

Illustration

The following is a further detailed description of the present invention in conjunction with the

accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the circuit principle of an embodiment of the present invention. Specific Embodiments

In order to make the features and advantages of this patent more obvious and understandable,

the following embodiments are cited for detailed description as follows.

As shown in FIG.1, this embodiment provides a specific solution for an improved energy-saving

starter with one-touch start function, it mainly comprises: a starting switch module, a compound

relay module, a starter module and a reset module;

wherein the starting switch module comprises a starting switch, a contactor and a timing switch

(timer); the compound relay module comprises a first relay and a second relay; the starting

module comprises: a permanent magnet, a reset spring, a main terminal, a contact disc, a movable

iron core, a suction-pull coil, a DC motor, a brass bushing and a fork mechanism; the reset module

comprises a return coil;

specifically, the timing switch, the coil of the contactor, the starting switch, the coil of the first

relay and the normally closed contact of the second relay are connected in series between the

battery and ground as the starting circuit, and the two ends of the first normally open contact of

the contactor form a parallel connection with the starting switch, so that the starting circuit

remains self-locking after being energized, and the correlation with whether the starting switch is

closed is lifted to achieve one-touch starting, so that in this embodiment, the starting switch can

be in the form of a key contact switch or a voice-activated switch or an infrared induction switch,

etc. As a backup power source for the vehicle when the generator is not operating, the battery is

respectively: via the normally open contact of said first relay and the suction-pull coil, and via the

main terminal connected to one end of the DC motor, and via the normally closed contact of the

contactor connected to the return coil, and then grounded; the other end of the DC motor is

grounded; for powering the functional components at different time points.

In this embodiment, the movable iron core is set inside the brass bushing and forms a sliding

connection with the brass bushing, which can slide to the left or right relative to the brass bushing

under the action of force; one end of the movable iron core is connected with a contact disc and a

reset spring, and the other end is connected with a fork mechanism; the contact disc and

permanent magnet are located on both sides of the main terminal post. The suction-pull coil and

the return coil are wound on the brass bushing, and the winding direction is opposite.

In the case that the suction-pull coil and the return coil are not energized, the reset spring makes the contact disc not contact with the main terminal; when the suction-pull coil is energized, the permanent magnet generate suction to the movable iron core; when the return coil is energized, the permanent magnet generates repulsion to the movable iron core.

In this embodiment, the fork mechanism adopts a linkage structure, and the fork can rotate and

swing around the positioning pin; the lower end of the fork of the fork mechanism is connected to

the one-way clutch of the starter, and the driving gear of the one-way clutch forms a separable or

engageable fit with the engine flywheel ring; the DC motor is mechanically connected to the

driving gear.

The neutral contact of the generator is grounded via the coil of the second relay, and via the

second normally open contact of the contactor respectively: grounded via the return coil, and

grounded via the normally closed contact of the contactor and the battery; the output B terminal

of the generator is connected to the positive terminal of the battery; wherein, the second

normally open contact of the contactor is set only to avoiding the neutral contact of the generator

from being directly connected to the battery, thus destroying the charging circuit of the generator

to the battery, so the second normally open contact is interlocked with the normally closed

contact of the contactor, so that the direct pathway connection between the neutral contact of

the generator and the battery is always in the disconnected state.

The following is a detailed description of the specific working process of the device of this

embodiment.

Before engineering vehicles (cars) starting, all coils, timing switches, contactors and relays have

not yet been energized, the generator has not yet begun to work, due to the certain distance

designed between the permanent magnet and contact disc, the suction force is small, the contact

disc in the reset spring recovery pressure under the action of the main terminal to maintain a

disconnected state.

When starting the vehicle engine, press the start switch, the timing switch and the contactor get

power, the first normally open contact KM of the contactor closes and the normally closed contact

KM breaks at the same time; the contactor normally closed contact KM breaks so that the battery

will not have any effect on the return coil at the initial stage of starting, the first normally open

contact KM of the contactor closes to realize the self-locking and self-protection of the starting

button system and realize the one-touch starting function; then the compound The L1 starting coil

in the composite relay is energized in the normally closed contact K2 closed state, which generates electromagnetic force to make the normally open contact K1 of the composite relay close and start, then the battery supplies power to the suction-pull coil and DC motor in series through the normally open contact K1 of the composite relay, after the suction-pull coil is energized, the movable iron core overcomes the restoring force of the reset spring and moves to the left under the action of the magnetic force of the suction-pull coil. On the one hand, the right side of the fork is pulled by the adjusting screw to rotate around the positioning pin, and the lower end of the fork pushes the starter freewheel in the right direction according to the arrow to make the DC motor drive gear engage with the engine flywheel, because the suction-pull coil just starts to connect with the DC motor winding in series, the voltage and current of the DC motor is smaller, and the torque generated is also smaller, which is conducive to the slow and shock-free engagement of the

DC motor drive gear with the engine flywheel gear ring. On the other hand, the left movable iron

core pushes the contact disc to the left, when the contact disc contacts with the upper and lower

two main terminals, the main circuit of the starter is connected and the suction-pull coils are

shorted, so all the voltage capacity of the battery is added to both ends of the DC motor through

the contact disc to produce the maximum voltage and current, at this time, the starter drive gear

and the engine flywheel gear ring are fully engaged under the force of the fork, and the torque

reaches the maximum. The torque reaches the maximum, and the DC motor can run at full speed

to start the engine. At the same time, because the contact disc and permanent magnet distance is

very close, the contact disc in the permanent magnet under the action of the larger suction force

to overcome the restoration spring recovery force to tightly suck the two main terminals, instead

of the existing starter system to maintain the function of the holding coil, maintain the DC motor

full speed starting, until the end of the engine starting process. During the starting process, when

the starting switch is turned on to start starting, the timing switch starts timing, and within the set

timing switch experience time, there are two cases: one is successful starting; the other is because

of unsuccessful starting fault including various unknown reasons.

When the start is completed successfully within the set timing switch experience time, the engine

drives the generator to generate electricity normally, and the generator neutral point voltage is

formed to establish, on the one hand, to supply power to the return coil wound on the brass

bushing, and the design return coil is wound in the opposite direction to the suction-pull coil, and

the opposite magnetic flux and magnetic force direction is generated, and the movable iron core

overcomes the close suction of the permanent magnet to the right under the magnetic force of the return coil At the same time, it makes the driving gear exit the engagement, the contact disc from the main terminal reset, the main circuit of the DC motor is disconnected, the starter stops working; on the other hand, the generator neutral voltage supplies power to the protection coil L2 in the compound relay, generating electromagnetic suction to open the normally closed contact

K2 protection contact in the compound relay, which cuts off the starting coil L1 circuit of the

compound relay. Normally open starting contact K1 reset disconnection, suction-pull coil circuit

loss of power, even if the starting switch is still in the starting gear, that is, has not yet reached the

experience time set by the timing switch, suction-pull coil circuit and starting circuit can not be

energized, the starter will automatically stop running, to prevent the vehicle driver from

repeatedly starting due to misoperation and cause the starter gear and flywheel ring impact

damage, to protect the starter; at the same time set a good At the same time, the set safety timing

switch experience time is slightly longer without any interference to the starting system, when the

safety setting time of the timing switch reaches, the timing switch line is disconnected, the starting

contactor KM is de-energized, and the normally open contact and normally closed contact are

reset.

When the unsuccessful starter starting fault occurs due to various unknown reasons within the set

timing switch experience time, the timing switch will forcibly cut off the starting contactor circuit,

KM normally open contact and normally closed contact will return to the initial position, forcibly

cut off the starting coil L1 circuit of the compound relay, the normally open starting contact K1 of

the compound relay will be reset and disconnected, the suction-pull coil circuit will be

de-energized, and the battery will The reverse electromagnetic force generated by the return coil

pulls the movable core back, and the contact disc moves to the right and resets under the strong

suction of the battery-powered return coil, overcoming the close suction of the permanent

magnet, disconnecting from the two main terminals, disconnecting the main circuit of the DC

motor, and at the same time, the drive gear exits engagement and the starter stops working.

Prevent the fault makes the starting switch is not disconnected in time and cause a long time

operation of the one-way clutch, resulting in the starter drive gear and engine flywheel

engagement gear ring damage, but also to prevent the battery due to unsuccessful starting caused

by the starting contact time is too long and complete loss of power.

The mechanism is set with a starter contactor KM and its normally open contact in parallel with

the starting switch, making the system have a one-touch start function, that is, once the starting switch is closed to start, the starter contactor KM will keep the system self-locking, and the DC motor line will stay on and run at full speed until the end of the starting process; the starting switch can use buttons, owner's voice control or human infrared induction to realize the start trigger. The set timing switch experience time can also prevent inexperienced operators from damaging the electrical equipment of the starter system due to the incomplete starting process caused by the insufficient time of closing the starting switch; the use of permanent magnets instead of the original holding coil can save nearly 1/3 of the starting energy, but the contact disc in the permanent magnets under the action of the larger suction may produce tightly sucked two main terminals will not release and other failures, set a good The timing switch experience time control can solve the above unidentified fault caused by a variety of unsuccessful starting problems, to prevent damage to the starter equipment and battery damage occurred completely loss of power.

This patent is not limited to the above best implementation, anyone under the inspiration of this

patent can come up with other various forms of improved energy-saving starter with one-touch

start function and control method, all the equal changes and modifications made according to the

scope of the patent application of this invention shall be covered by this patent.

Claims

Claim 1. An improved energy-saving starter with one-touch start function, characterized in that: it

comprises: a starting switch module, a compound relay module, a starting module and a reset

module;

said starting switch module comprises a starting switch, a contactor and a timing switch; said

compound relay module comprises a first relay and a second relay; said starting module comprises:

a permanent magnet, a reset spring, a main terminal, a contact disc, a movable iron core, a

suction-pull coil, a DC motor, a brass bushing and a fork mechanism; said reset module comprises

a return coil;

said timing switch, the coil of the contactor, the starting switch, the coil of the first relay and the

normally closed contact of the second relay are connected in series between the battery and

ground as a starting circuit, the two ends of the first normally open contact of said contactor are

connected in parallel with the starting switch;

said battery is respectively: via the normally open contact of said first relay and the suction-pull

coil, and via the main terminal connected to one end of the DC motor, and via the normally closed

contact of the contactor connected to the return coil, and then grounded; the other end of the DC

motor is grounded;

said movable iron core is provided inside the brass bushing and forms a sliding connection with

the brass bushing; one end of said movable iron core is connected with the contact disc and the

reset spring, and the other end is connected with the fork mechanism; said contact disc and

permanent magnet are located on each side of the main terminal;

the neutral contact of the generator is grounded via the coil of the second relay, and via the

second normally open contact of the contactor respectively: grounded via the return coil, and

grounded via the normally closed contact of the contactor and the battery; the output B terminal

of the generator is connected to the positive terminal of the battery;

said suction-pull coil and return coil are wound on the brass bushing and wound in opposite

directions.
2. An improved energy-saving starter with one-touch start function according to claim 1,

characterized in that: said fork mechanism adopts a linkage structure; the lower end of said fork

mechanism is connected to the one-way clutch of the starter, and the driving gear of the one-way clutch forms a separable or engaging fit with the engine flywheel ring; said DC motor is mechanically connected to the driving gear.
3. An improved energy-saving starter with one-touch start function according to claim 2, characterized in that: when said suction-pull coil and return coil are not energized, said reset

spring keeps the contact disc from contacting the main terminal; when said suction-pull coil is

energized, the permanent magnet exerts a suction force on the movable core; when said return

coil is energized, the permanent magnet exerts a repulsion force on the movable core.
4. An improved energy-saving starter with one-touch start function according to claim 1,

characterized in that: said start switch is a key contact switch or an acoustic switch or an infrared

induction switch.
5. A control method of the improved energy-saving starter with one-touch start function according

to claim 3, characterized in that: when starting the vehicle engine, said starting switch is pressed;

the timing switch and contactor are energized and the first normally open contact of the contactor

closes and the normally closed contact opens;

at the same time, the coil of said first relay is energized and the normally open contact of the first

relay closes to start, then the battery supplies power to the suction-pull coil and DC motor through

the normally open contact of the first relay, after the suction-pull coil is energized, the movable

iron core moves under the action of the magnetic force of the suction-pull coil to overcome the

restoring force of the reset spring, and the fork also rotates to engage the drive gear of the

one-way clutch of the starter with the engine flywheel; until the contact disc is in contact with the

main terminal, the main circuit of the starter is connected, the suction-pull coil is shorted, and the

full voltage of the battery is added to both ends of the DC motor through the contact disc, at this

time the driving gear of the starter and the flywheel ring of the engine are fully engaged under the

force of the fork, the torque reaches the maximum, and the DC motor runs at full speed to start

the engine;

at this time, under the action of the larger suction force of the permanent magnet, the contact

disc overcomes the restoring force of the reset spring to absorb the main terminal, instead of

holding the coil, to maintain the DC motor full speed start until the end of the engine fully start

process.
6. A control method of the improved energy-saving starter with one-touch start function according

to claim 5, characterized in that: during the starting process, when said starting switch is turned on to start, the timing switch starts timing: when the starting is completed within the set timing switch experience time, the engine drives the generator to generate electricity normally, the generator neutral point voltage is formed and established, power is supplied to said return coil, the return coil generates magnetic flux and magnetic force direction opposite to that of the suction-pull coil, causing the movable iron core to reset, while causing the drive gear to exit engagement, the contact disc disengages from the main terminal, the main circuit of the DC motor is disconnected, and the starter stops working; at the same time the generator neutral point voltage supplies power to the coil of the second relay, causing the normally closed contact of the second relay to open, cutting off the starting circuit; when the situation of unsuccessful starting occurs within the set timing switch experience time, said timing switch breaks and cuts off the starting circuit, the starting coil of the first relay loses power, the normally open contact of the first relay opens tode-energize the suction-pull coil, the battery energizes the return coil, the movable iron core resets, and the starter stops working.