WO1998014702A1 - A system for the automatic cut off of a car's engine and its automatic restart - Google Patents

A system for the automatic cut off of a car's engine and its automatic restart Download PDF

Info

Publication number
WO1998014702A1
WO1998014702A1 PCT/GR1997/000035 GR9700035W WO9814702A1 WO 1998014702 A1 WO1998014702 A1 WO 1998014702A1 GR 9700035 W GR9700035 W GR 9700035W WO 9814702 A1 WO9814702 A1 WO 9814702A1
Authority
WO
WIPO (PCT)
Prior art keywords
engine
car
restarting
rpm
fact
Prior art date
Application number
PCT/GR1997/000035
Other languages
French (fr)
Inventor
John Valvis
Original Assignee
John Valvis
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by John Valvis filed Critical John Valvis
Publication of WO1998014702A1 publication Critical patent/WO1998014702A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
    • F02N2200/022—Engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
    • F02N2200/0803—Parking brake state
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/10—Parameters used for control of starting apparatus said parameters being related to driver demands or status
    • F02N2200/103—Clutch pedal position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention refers to a method of automatic start and cut off of a car's internal combustion engine of any fuel.
  • the internal combustion engines of cars start and cut off their operation taking direct commands from their operator (the car's driver).
  • the driver turns off the engine by interrupting the fuel's ignition circuit using a switch which in modern automobiles is located where the car's key is inserted in the steering column or dashboard. With the same switch, which also acivates the starter, turning on the engine is achieved.
  • a switch which in modern automobiles is located where the car's key is inserted in the steering column or dashboard.
  • the same switch which also acivates the starter, turning on the engine is achieved.
  • the turning off of a car's engine during long stops in heavy traffic is recommended.
  • the present invention consists of an electronic - mechanical system which in receiving data from a combination of sensors turns off or on the engine of a car.
  • the sensors could be of any type (electronic - mechanical) as many in quantity and are providing data from the car's status the control instuments and the car's operation levers.
  • thermoelectric sensor activates the invention (renders the invention operational) when the engine has reached its operating temperature.
  • the system contains a further electronic circuit that switches off large electrical consumptions (lights, windscreen wipers, heated rear window) for as long as the engine is switched off so the battery is not discharged
  • the same electronic circuit restores large elecrtical consumptions immediately after the engine is switched on agam
  • the system can be made to include an electronic circuit to monitor the vehicle's battery condition, to prevent it from activating when the battery is low, while a beeper will inform the driver in such case It can also include an electronic circuit that will activate the device only when the engine's revolutions per minute (RPM) fall below a certain limit (Approx 1500 RPM)
  • RPM revolutions per minute
  • the automatic system functions as follows
  • Logic gate N 13 activates the device (invention) when the engine s temperature reaches a predetermined value and the resistance of the thermistor NTC which is placed in the cooling system of the engine is lowered This circuit can be put out of order if thermistor NTC is taken away
  • Logic gates N6 to N 15 deactivate the device when the battery s voltage falls below a certain limit (approx 1 1 5 V) while gates N23, N5 activate the piezoelectric beeper
  • This circuit can be put out of order if resistor P2 is taken away
  • the two monostable multivibrators IC 1 and IC2 activate the automation only when the engine's RPM that trigger the input -T of IC 7 lie below a certain level
  • the automation system can also be implemented with other type of sensors like brake sensors, gear lever sensors etc but in practice they proved either redundant or not an economically viable solution

Abstract

With the suggested system, automatic turning off and on of the engine of a car is achieved according to the position of the clutch pedal, the handbreak and the engine's RPM rate. The system comprises two sensors (on - off switches) placed on the clutch and handbreak, a circuit which changes its state (high - low) according to the engine's RPM, a combination of digital electronic circuits processing the data from the sensors and a series of relays two of which control the ignition and the starter of the car. With the system in use, when the clutch pedal is not depressed, the handbreak pulled and the engine's RPM below a certain level (approx. 1500 RPM) the engine stops. The engine starts when the clutch pedal is depressed.

Description

A system for the automatic cut off of a car's engine and its automatic restart
The invention refers to a method of automatic start and cut off of a car's internal combustion engine of any fuel.
The internal combustion engines of cars start and cut off their operation taking direct commands from their operator (the car's driver). The driver turns off the engine by interrupting the fuel's ignition circuit using a switch which in modern automobiles is located where the car's key is inserted in the steering column or dashboard. With the same switch, which also acivates the starter, turning on the engine is achieved. Nowadays when minimum atmospheric pollution and maximum fuel saving is called for from modern cars the turning off of a car's engine during long stops in heavy traffic is recommended.
Furthermore, because the injection and ignition of fuel in the engine is controlled by a microprocessor during the starting of the engine no greater fuel consumption is required than its consumption at idle during the stop in traffic. There is therefore a need for an automatic cut off and restart system for the engine different from the traditional already described which requires some effort from the driver. The present invention consists of an electronic - mechanical system which in receiving data from a combination of sensors turns off or on the engine of a car. The sensors could be of any type (electronic - mechanical) as many in quantity and are providing data from the car's status the control instuments and the car's operation levers.
In this invention two sensors are used. They both are on - off switches. We have chosen to specifically position the sensors at the clutch pedal and the handbreak lever. For the handbreak sensor we can use the switch which is already fitted to most cars and lights the indication «handbreak on» on the dashboard. The choice of sensors mentioned does not restrict the invention neither for their type or their number. We considered the specific choice of the two sensors and the position where they are put to be the best possible and this constitutes the main characteristic of this invention.
A third thermoelectric sensor activates the invention (renders the invention operational) when the engine has reached its operating temperature. The system contains a further electronic circuit that switches off large electrical consumptions (lights, windscreen wipers, heated rear window) for as long as the engine is switched off so the battery is not discharged The same electronic circuit restores large elecrtical consumptions immediately after the engine is switched on agam
The system can be made to include an electronic circuit to monitor the vehicle's battery condition, to prevent it from activating when the battery is low, while a beeper will inform the driver in such case It can also include an electronic circuit that will activate the device only when the engine's revolutions per minute (RPM) fall below a certain limit (Approx 1500 RPM)
The automatic system functions as follows
When the clutch pedal is not depressed its sensor is activated If the handbreaks sensor is also activated (handbreak pulled) then the engine is swithced off The engine is turned on again when the clutch pedal is depressed
Necessary prerequisite for the engine to start is for the handbreak to remain pulled i e handbreak s sensor activated
The following description of elecrtonic drawings refers to a possible implementation of the invention as an example , Refenng to drawing No 1 the switch Δ 1 is the sensor positioned in the clutch pedal and switch Δ2 the sensor in the handbreak RL1 is the relay (switch) that cuts and reactivates the engine s ignition RL2 is the relay that activates the starter RL3, RL4, RL5 are the relays that switch off and on large electrical consumptions Relays RL1 , RL3, RL4, RL5 are of single pole double throw type When relay RL1 is activated the engine is switched off Similarly when relays RL2 to RL5 are activated the circuits they control are switched off Opposite results follow deactivation of the above relays RL2 to RL5 When relay RL2, which controls the starter is activated the starter is turned on The way the relays operate has been chosen so that when the device (invention) is not in use the car works normally without any automation
When the handbreak is off the switch Δ2 is open Then irrespective of switch s Δ 1 state all relays RL1 to RL5 are deactivated Therefore the car s engine and electic circuits operate normally When the handbreak is pulled switch Δ2 closes If also switch Δ 1 closes or is already closed (clutch pedal not depressed) then relay RL1 is activated and the engine is switched off Simultaneously relays RL3 RL4, RL5 are activated and the other electrical consumptions are switched off Relay RL2 does note change state (it remains deactivated) When switch Δ2 is on (clutch pedal depressed), relay RL1 is deactivated resulting in restoration of current supply to the ignition system of the car Simultaneously relay RL2 and the starter are activated and the engine is turned on The starter operates until the engine starts and the voltage generated by the alternator changes the state of gate N 18 from 0 to 1 Then relay RL2 is deactivated and the starter is switched off The command to gate N18 could also be given by other instruments that change their state when the engine is turned on, like oil pressure gauge, RPM meter etc Immediately after the starting of the engine, relays RL3, RL4, RL5 are deactivated and all electrical consumptions are restored
In case the engine does not start the starter stops after a period determined by the monostable multivibrator that consists of gates N9, N 10 A period of approximately 5 seconds is considered appropriate
Logic gate N 13 activates the device (invention) when the engine s temperature reaches a predetermined value and the resistance of the thermistor NTC which is placed in the cooling system of the engine is lowered This circuit can be put out of order if thermistor NTC is taken away Logic gates N6 to N 15 deactivate the device when the battery s voltage falls below a certain limit (approx 1 1 5 V) while gates N23, N5 activate the piezoelectric beeper
This circuit can be put out of order if resistor P2 is taken away The two monostable multivibrators IC 1 and IC2 activate the automation only when the engine's RPM that trigger the input -T of IC 7 lie below a certain level
The automation system can also be implemented with other type of sensors like brake sensors, gear lever sensors etc but in practice they proved either redundant or not an economically viable solution

Claims

1. System of automatic turning off and restarting the engine of a car characterized by the fact that receives commands from two sensors (on - off switches) that are placed in the clutch and the handbreak, each of which contributes to the turning off and restarting, of the car's engine only if the engine's temperature has exceeded a predetermined level, the engine's RPM are below a predetermined rate and the battery's voltage is above a predetermined limit.
2. System of automatic turning off and restarting the engine of a car according to claim No 1 , characterized by the fact that it can be made to function independently from the engine's temperature.
3. System of automatic turning off and restarting the engine of a car according to claim No 1 , characterized by the fact that it can be made to function independently from the engine's RPM.
4. System of automatic turning off and restarting the engine of a car according to claim No 1 , characterized from the fact that it can be made to function independently from the car's battery voltage.
5. System of automatic turning off and restarting the engine of a car according to claim No 1 , characterized from the fact that the sensors are of a different type other than on - off switches.
6. System of automatic turning off and restarting the engine of a car according to claims 1 to 4 characterized by the fact that it also controls various other electronic circuits of the car.
7. System of automatic turning off and restarting the engine of a car according to claims 1 to 4 characterized by the fact that the final commands for the switching off and on of the engine are given by relays.
PCT/GR1997/000035 1996-10-01 1997-09-26 A system for the automatic cut off of a car's engine and its automatic restart WO1998014702A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GR96100333 1996-10-01
GR960100333 1996-10-01

Publications (1)

Publication Number Publication Date
WO1998014702A1 true WO1998014702A1 (en) 1998-04-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GR1997/000035 WO1998014702A1 (en) 1996-10-01 1997-09-26 A system for the automatic cut off of a car's engine and its automatic restart

Country Status (2)

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GR (1) GR1002758B (en)
WO (1) WO1998014702A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2338570A (en) * 1998-10-28 1999-12-22 Ho Keung Tse Performing vehicle control functions in dependence on whether the vehicle is stationary
FR2795770A1 (en) * 1999-06-30 2001-01-05 Valeo Equip Electr Moteur System for automatically cutting off and re-starting the engine during moments of temporary immobilisation, such as when the vehicle is stopping at a red light
FR2816891A1 (en) 2000-11-20 2002-05-24 Peugeot Citroen Automobiles Sa Automatic starting and stopping control for motor vehicle internal combustion engine has sensors for vehicle operating parameters connected to control for engine starting and stopping circuits
WO2006027515A1 (en) 2004-08-27 2006-03-16 Peugeot Citroën Automobiles Sa. Method of inhibiting the automatic stop control system of the heat engine of a vehicle in congested traffic
WO2006027512A1 (en) 2004-08-27 2006-03-16 Peugeot Citroën Automobiles SA Method of inhibiting the automatic stop control system of the heat engine of a vehicle during parking manoeuvres
DE102004052786A1 (en) * 2004-10-30 2006-05-24 Volkswagen Ag Method for controlling a pushing operation of a hybrid vehicle and hybrid vehicle
WO2014191464A1 (en) 2013-05-31 2014-12-04 Volkswagen Aktiengesellschaft Method for operating a vehicle comprising an internal combustion engine having a start-stop function
DE102005034602B4 (en) * 2005-07-25 2015-07-16 Robert Bosch Gmbh Method for operating a motor vehicle with an internal combustion engine, computer program product, electrical storage medium for a control and / or regulating device and control and / or regulating device for a motor vehicle
WO2017100893A1 (en) * 2015-12-17 2017-06-22 Robert Bosch Limitada Method for controlling a switching-off and starter device for the internal combustion engine of a heavy-weight vehicle, and said device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5867940A (en) * 1981-10-19 1983-04-22 Nissan Motor Co Ltd Automatically starting/stopping device of engine
DE3303467A1 (en) * 1982-02-16 1983-09-01 Nissan Motor Co., Ltd., Yokohama, Kanagawa Start/stop system for motor vehicles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5867940A (en) * 1981-10-19 1983-04-22 Nissan Motor Co Ltd Automatically starting/stopping device of engine
DE3303467A1 (en) * 1982-02-16 1983-09-01 Nissan Motor Co., Ltd., Yokohama, Kanagawa Start/stop system for motor vehicles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 159 (M - 228) 13 July 1983 (1983-07-13) *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2338570A (en) * 1998-10-28 1999-12-22 Ho Keung Tse Performing vehicle control functions in dependence on whether the vehicle is stationary
GB2338570B (en) * 1998-10-28 2000-10-25 Ho Keung Tse Vehicle window transmissivity control
FR2795770A1 (en) * 1999-06-30 2001-01-05 Valeo Equip Electr Moteur System for automatically cutting off and re-starting the engine during moments of temporary immobilisation, such as when the vehicle is stopping at a red light
US6526931B1 (en) 1999-06-30 2003-03-04 Valeo Equipments Electriques Moteur Method and systems for the automatic control of the cutting off and restarting of the thermal engine of a vehicle during temporary immobilizations thereof
FR2816891A1 (en) 2000-11-20 2002-05-24 Peugeot Citroen Automobiles Sa Automatic starting and stopping control for motor vehicle internal combustion engine has sensors for vehicle operating parameters connected to control for engine starting and stopping circuits
WO2006027512A1 (en) 2004-08-27 2006-03-16 Peugeot Citroën Automobiles SA Method of inhibiting the automatic stop control system of the heat engine of a vehicle during parking manoeuvres
WO2006027515A1 (en) 2004-08-27 2006-03-16 Peugeot Citroën Automobiles Sa. Method of inhibiting the automatic stop control system of the heat engine of a vehicle in congested traffic
US8616169B2 (en) 2004-08-27 2013-12-31 Peugeot Citroen Automobile Sa Method of inhibiting the automatic stop control system of the heat engine of a vehicle in congested traffic
DE102004052786A1 (en) * 2004-10-30 2006-05-24 Volkswagen Ag Method for controlling a pushing operation of a hybrid vehicle and hybrid vehicle
US7840337B2 (en) 2004-10-30 2010-11-23 Volkswagen Ag Method for controlling an overrun condition of a hybrid vehicle and hybrid vehicle
DE102005034602B4 (en) * 2005-07-25 2015-07-16 Robert Bosch Gmbh Method for operating a motor vehicle with an internal combustion engine, computer program product, electrical storage medium for a control and / or regulating device and control and / or regulating device for a motor vehicle
WO2014191464A1 (en) 2013-05-31 2014-12-04 Volkswagen Aktiengesellschaft Method for operating a vehicle comprising an internal combustion engine having a start-stop function
DE102013009220A1 (en) 2013-05-31 2014-12-04 Volkswagen Aktiengesellschaft Method for operating a vehicle with an internal combustion engine with a start-stop function
WO2017100893A1 (en) * 2015-12-17 2017-06-22 Robert Bosch Limitada Method for controlling a switching-off and starter device for the internal combustion engine of a heavy-weight vehicle, and said device

Also Published As

Publication number Publication date
GR1002758B (en) 1997-08-29

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