GB2319095A - Heating a vehicle interior by controlling fuel injection timing - Google Patents

Heating a vehicle interior by controlling fuel injection timing Download PDF

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Publication number
GB2319095A
GB2319095A GB9722112A GB9722112A GB2319095A GB 2319095 A GB2319095 A GB 2319095A GB 9722112 A GB9722112 A GB 9722112A GB 9722112 A GB9722112 A GB 9722112A GB 2319095 A GB2319095 A GB 2319095A
Authority
GB
United Kingdom
Prior art keywords
engine
heating
interior
internal combustion
vehicle
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB9722112A
Other versions
GB2319095B (en
GB9722112D0 (en
Inventor
Wolf Boll
Peter Krenovsky
Rudiger Pfaff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Publication of GB9722112D0 publication Critical patent/GB9722112D0/en
Publication of GB2319095A publication Critical patent/GB2319095A/en
Application granted granted Critical
Publication of GB2319095B publication Critical patent/GB2319095B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00764—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/18—Heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • Y02T10/12—Improving ICE efficiencies
    • 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

Abstract

In a method of heating the interior of a vehicle driven by an internal combustion engine having injection valves 11, the injection of the fuel is controlled by at least one control unit 10. The waste heat, which is given off by the internal combustion engine to a cooling medium 4, is supplied, via a heat exchanger 6, to a heating system for the vehicle interior. The fuel injection, as a function of the engine operating point, is controlled, when the heat given off by the cooling medium 4 to the heat exchanger 6 is too low, in such a manner that an injection of fuel is delayed - relative to the optimum injection point for the performance of the internal combustion engine - by the control unit 10 at low-load operating points.

Description

2319095 Method and device for heating a vehicle interior The invention
relates to a method and device for heating a vehicle interior. The cooling-water heat of consumption-optimized internal combustion engines, in particular of direct-injection diesel engines, is often so low in the lower load range that adequate vehicle heating, by utilizing, via a heat exchanger, the heat of the cooling medium from the engine cooling circuit, is no longer possible. This applies both in the case of a hot engine in a traffic jam and in the case of increased driving performance in the warming-up period which lasts an excessive amount of time. This means that either less comfort when driving, with, for a time, low interior temperatures has to be accepted, or that additional heating devices have to be provided.
DE 37 44 441 AI discloses a device for heating the driver's cab of an internal combustion engine, having two separate circuits. These two circuits are connected to one another by a heat exchanger. One circuit is formed by oil from the internal combustion engine and the other circuit is formed by a second heat exchanger, a circulation pump and an expansion tank. In this case, the first circuit is in permanent operation, whereas the other circuit can be switched on and off as a function of temperature by a thermoswitch.
DE 40 26 595 C2 discloses a passenger-compartment heating system for vehicles. In this case, a convertor mechanism, an exhaust-gas heat exchanger and various heating appliances, inter alia, are provided. This heating system is primarily provided for vehicles in stationary mode and is intended to make optimum use of the fuel necessary for the heating system, by the series-connection of a catalytic convertor.
However, all of the known heating devices require additional appliances which, in turn, due to their weight increase the fuel consumption of the motor vehicle and, in the same manner, contribute to the increase in purchase price.
The present invention therefore seeks to provide a method of heating the vehicle interior of a motor vehicle, which method makes available a sufficient quantity of heat using simple means, in particular without special additional devices, even in engine operating conditions in which the heat given off by the engine would not normally be sufficient for adequate heating.
2 According to the present invention there is provided a method of heating the interior of a vehicle driven by an internal combustion engine having injection valves, the injection of the fuel being controlled by at least one control unit, and the waste heat, which is given off by the internal combustion engine to a cooling medium, being supplied, via a heat exchanger, to a heating system for the vehicle interior, wherein the fuel injection, as a function of the engine operating point, is controlled, when the heat given off by the cooling medium to the heat exchanger is too low, in such a manner that an injection of fuel is delayed, relative to the optimum injection point for the performance of the internal combustion engine, the delay being set by the control unit at low-load operating points.
The invention also provides a device for heating the interior of a vehicle driven by an internal combustion engine, the device having a thermostatic switch and an operating device, a control unit being provided to control the fuel to be injected, and a heat exchanger for the heating being arranged in a cooling circuit, which cools the internal combustion engine, wherein the control unit is adjustable as a function of the control of the thermostatic switch and of the temperature setting of the operating device in the vehicle interior.
The method and device according to the invention provides a very simple, additional heating option for the vehicle interior, without additional appliances. Since the method is only used in low-load operating conditions of the internal combustion engine, for example when idling at a standstill, in a traffic jam or in prolonged overrun conditions, there is no risk of any negative side effects being caused thereby.
The measure according to the invention changes the combustion process in the combustion chambers of the internal combustion engine in a negative manner per se - relative to the efficiency or performance of the internal combustion engine in such a manner that more heat is generated, some of which is given off to the cooling medium as additional waste heat. This additionally generated waste heat is then supplied, via the heat exchanger, to the heating system for the vehicle interior.
An embodiment of the invention will now be described in principle below with reference to the drawing.
The single drawing shows an internal combustion engine having a cooling circuit and control devices necessary for controlling injection.
3 According to the exemplary embodiment an induction system 2 is arranged on a diesel internal combustion engine 1. Furthermore, an engine cooling circuit 3 containing a cooling medium 4 is located on the internal combustion engine 1.
The internal combustion engine 1 is provided in production with a water pump 5 through which the cooling medium 4 is circulated within the engine cooling circuit 3.
The cooling medium 4 flows through a heat exchanger 6, in the direct vicinity of which is arranged a fan 7 through which waste heat, extracted from the cooling medium 4, is blown into a vehicle interior (not shown). An exhaust system 8 is also provided in a known manner.
A control unit 10 is connected, via electrical control connections 9, to electrical control connections on injection valves 11 of the internal combustion engine 1. Connected to this control unit 10, for the control thereof, is a thermostatic switch 12. The latter is connected in series to an operating device 13 which is situated in the vehicle interior and constitutes a temperature-selection switch.
If an operator sets the operating device 13 to a temperature lying above the current temperature in the vehicle interior, and it is established, in the process, that the existing cooling-water heat of the cooling medium 4 is insufficient to reach the desired temperature, the thermostatic switch 12 emits a control signal to the control unit 10. In this case, the control unit 10 causes, via the electrical control connections 9, the control currents for the electrical injection valves 11 to be changed in such a manner that in ection is delayed. The combustion process is thereby influenced to the effect j that higher combustion waste heat is produced.
Although this method of changing the injection is, in principle, undertaken by an operator actuating the operating device 13, the control unit will only accept the delayed injection at low-load operating points of the internal combustion engine 1.
In higher-load ranges the method is generally not required since the internal combustion engine 1 in any case provides sufficient waste heat there for heating the vehicle interior.
The method is, in principle, suitable both for direct-injection diesel engines and for Otto engines, but it will not, as a rule, be used in Otto engines since these usually provide sufficient waste heat for the heating system for the vehicle interior.

Claims (4)

4 Claims
1. A method of heating the interior of a vehicle driven by an internal combustion engine having injection valves, the injection of the fuel being controlled by at least one control unit, and the waste heat, which is given off by the internal combustion engine to a cooling medium, being supplied, via a heat exchanger, to a heating system for the vehicle interior, wherein the fuel injection, as a function of the engine operating point, is controlled, when the heat given off by the cooling medium to the heat exchanger is too low, in such a manner that an injection of fuel is delayed, relative to the optimum injection point for the performance of the internal combustion engine, the delay being set by the control unit at low-load operating points.
2. A device for heating the interior of a vehicle driven by an internal combustion engine, the device having a thermostatic switch and an operating device, a control unit being provided to control the fuel to be injected, and a heat exchanger for the heating being arranged in a cooling circuit, which cools the internal combustion engine, wherein the control unit is adjustable as a function of the control of the thermostatic switch and of the temperature setting of the operating device in the vehicle interior.
3. A device according to Claim 2, wherein the adjustment of the control unit is only provided at low-load engine operating points.
4. Apparatus for heating the interior of a vehicle substantially as described herein with reference to the accompanying drawings.
4. A method according to claim 1, wherein the engine is a diesel engine.
5. A device according to claim 2 or 3, wherein the engine is a diesel engine.
6. A method of heating the interior of a vehicle substantially as described herein with reference to, and as illustrated in, the accompanying drawing.
7. A device for heating the interior of a vehicle substantially as described herein with reference to, and as illustrated in, the accompanying drawings.
Amendments to the claims have been filed as follows 1. Apparatus for heating the interior of a vehicle driven by fuel injected internal combustion engine including a heat exchanger for said heating connected in a cooling medium circuit of the engine to vehicle temperature control means and engine control means operable to retard the engine fuel injection during predetermined low load operating conditions of the engine to enhance the waste heat available from the engine via said heat exchanger.
2. Apparatus as claimed in claim 1, wherein said engine is a diesel engine.
3. Apparatus as claimed in claim 1 or 2, wherein said vehicle temperature control means is a thermostatic switch and said engine control means comprises a control unit which controls fuel injection valves of the engine said control unit being adjustable as a function of said thermostatic switch which responds to the temperature of the interior of the vehicle.
GB9722112A 1996-10-25 1997-10-20 Method and device for heating a vehicle interior Expired - Fee Related GB2319095B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19644402A DE19644402C1 (en) 1996-10-25 1996-10-25 Diesel vehicle interior heating method

Publications (3)

Publication Number Publication Date
GB9722112D0 GB9722112D0 (en) 1997-12-17
GB2319095A true GB2319095A (en) 1998-05-13
GB2319095B GB2319095B (en) 1998-07-15

Family

ID=7809984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9722112A Expired - Fee Related GB2319095B (en) 1996-10-25 1997-10-20 Method and device for heating a vehicle interior

Country Status (4)

Country Link
DE (1) DE19644402C1 (en)
FR (1) FR2757109B1 (en)
GB (1) GB2319095B (en)
IT (1) IT1295824B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10029231B4 (en) * 2000-06-14 2011-06-16 Bayerische Motoren Werke Aktiengesellschaft Device and method for increasing the heating power in the passenger compartment of a motor vehicle
DE10260781A1 (en) * 2002-12-23 2004-07-01 Daimlerchrysler Ag Method for heating an interior of a vehicle, and device for this purpose
FR2933906B1 (en) * 2008-07-21 2011-04-08 Peugeot Citroen Automobiles Sa METHOD AND DEVICE FOR IMPROVING THE RISE IN THE TEMPERATURE OF THE CABIN OF A VEHICLE
DE102013201947B4 (en) 2012-02-29 2023-01-12 Ford Global Technologies, Llc Method and device for heating the interior of a motor vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2062214A (en) * 1979-09-14 1981-05-20 Audi Ag Motor vehicle having a passage compartment heating device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744441A1 (en) * 1987-12-29 1989-07-13 Kloeckner Humboldt Deutz Ag Device for heating the driver's cab of an internal combustion engine
DE4026595A1 (en) * 1990-08-23 1992-02-27 Man Nutzfahrzeuge Ag PASSENGER HEATING FOR VEHICLES

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2062214A (en) * 1979-09-14 1981-05-20 Audi Ag Motor vehicle having a passage compartment heating device
US4335849A (en) * 1979-09-14 1982-06-22 Audi Nsu Auto Union Aktiengesellschaft Motor vehicle having a passenger compartment heating device

Also Published As

Publication number Publication date
GB2319095B (en) 1998-07-15
DE19644402C1 (en) 1997-09-11
FR2757109A1 (en) 1998-06-19
FR2757109B1 (en) 2003-05-09
GB9722112D0 (en) 1997-12-17
IT1295824B1 (en) 1999-05-28
ITRM970643A1 (en) 1999-04-24

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20041020