GB2273374A - Fuel feed control means for an engine - Google Patents
Fuel feed control means for an engine Download PDFInfo
- Publication number
- GB2273374A GB2273374A GB9325289A GB9325289A GB2273374A GB 2273374 A GB2273374 A GB 2273374A GB 9325289 A GB9325289 A GB 9325289A GB 9325289 A GB9325289 A GB 9325289A GB 2273374 A GB2273374 A GB 2273374A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- pressure
- control means
- injection
- engine
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0605—Control of components of the fuel supply system to adjust the fuel pressure or temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0607—Control of components of the fuel supply system to adjust the fuel mass or volume flow
- F02D19/061—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0665—Tanks, e.g. multiple tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/084—Blends of gasoline and alcohols, e.g. E85
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/085—Control based on the fuel type or composition
- F02D19/087—Control based on the fuel type or composition with determination of densities, viscosities, composition, concentration or mixture ratios of fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0673—Valves; Pressure or flow regulators; Mixers
- F02D19/0678—Pressure or flow regulators therefor; Fuel metering valves therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0611—Fuel type, fuel composition or fuel quality
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Fuel feed control means for an internal combustion engine adapts the injected fuel quantity in dependence on fuel composition (eg. methanol content). Both the injection duration and the fuel pressure are variable; injection duration being varied, for example, in dependence on engine operating characteristics and fuel pressure in dependence on the fuel composition Fuel composition may be measured by means of a sensor 22 in the fuel tank 10 or by means of an exhaust gas sensor. Pressure variation may be continuously variable by a single pressure regulator 14 or stepwise by means of a plurality of selectable regulators. <IMAGE>
Description
FUEL FEED CONTROL MEANS FOR AN ENGINE
The present invention relates to fuel feed control means for an internal combustion engine, in particular an engine operable with fuel charges of different composition.
In such an engine, fuel is conveyed by a fuel pump and fed to the injection valves. The fuel pressure is regulated by a pressure regulator and the duration of injection pulses controlling operation of the valves is fixed according to need by a control device.
Appropriate means, for example a sensor responsive to the methanol content of the fuel, are provided for ascertaining the fuel composition.
A method for the adaptation of the injected fuel quantity in an internal combustion engine, which is operable with fuel mixtures of different composition, is described in DE-OS 40 19 0 & . In this method, however, the primary object is to ensure that the conveyed quantity of fuel is set in dependence on the composition of the fuel. In that case, the conveyed quantity of the fuel pump is determined with rising methanol content of the fuel. Since the pressure built up by the fuel pump in the method approximately corresponds to a preset pressure, the injected quantity of fuel is determined solely by way of the opening duration of the injection valves.
If fuels of very different composition are to be used, the opening duration of the valves would have to be very different and extend over a wide range. However, this range cannot be selected to be as wide as desired, in which case regulation of the injected quantity exclusively by way of the opening duration of the valves cannot take place to the required degree.
According to the present invention there is provided control means for adaptation of the injected quantity in an internal combustion engine operable with fuel mixtures of different composition, with a fuel pump which feeds fuel to injection valves, a pressure regulator for influencing fuel pressure, computing means for delivering required control signals and means for ascertaining the composition of the fuel, characterised in that the adaptation takes place through variation of the duration of injection and variation of the fuel pressure.
Control means embodying the invention may have the advantage that the adaptation of the injected quantity is possible over a very wide range and that this adaptation can be employed in both usual forms of injection systems, namely intermittent injection in which adaptation of the quantity of fuel takes place through variation of the injection times at constant fuel pressure and the continuous injection in which the quantity of fuel is varied through variation of the fuel pressure at constant injection time. This is achieved in that the adaptation of the injected quantity takes place through variation of the duration of injection as well as through variation of the fuel pressure.The adaptation of the injected quantity can take place in advantageous manner with the aid of a control device or a microcontroller, in which operational parameters of the engine, such as temperature, rotational speed, air throughput, idling operation, full throttle operation, overrun operation and others, can be taken into consideration.
Recognition of the fuel mixture can take place in advantageous manner by way of a suitable sensor, which, for example, is arranged in a fuel tank and measures the proportion of a component of the fuel, for example the proportion of alcohol in the fuel, each time the engine is started and possibly even continuously. In place of a sensor, an evaluation of the exhaust gas composition could be utilised for ascertaining the fuel composition; in that case, required adaptations are also possible. It is also possible to combine the two alternatives.
Adaptation of the injected quantity in dependence on the fuel mixture that is present can be undertaken steplessly or in steps.
It is particularly advantageous that rapid changes in the fuel requirement can be reacted toby way of the variation of the injection time and slow changes by way of adaptation of the fuel pressure.
An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawings, in which:
Fig. 1 is a diagram of an engine fuel supply system
and fuel feed control means embodying the
invention; and
Figs. 2a to 2c are diagrams illustrating relationships for
fuel quantity requirements with different fuel
compositiions and different engine operational
states.
Referring now to the drawings there is shown in Fig. 1 a fuel supply system for an internal combustion engine, in which system fuel, which is disposed in a fuel tank 10, is pumped by an electrical fuel pump 11 through a fuel filter 12 to a fuel pressure storage device 13. A pressure regulator 14 regulates the fuel pressure available to an injection valve 15. Excess fuel is returned to the fuel tank 10 by way of a pulse damper 16 and a return duct 17.
The injection valve 15 injects the fuel according to need into the engine induction duct 19 close to the cylinder 18 bf the engine.
The arising fuel/air mixture can be ignited by way of a spark plug 20. The entire system is controlledbya schematically illustrated control device 20, which delivers control signals to the individual elements.
The pressure regulator 14 is a variable pressure regulator, to which drive control signals, which cause it to regulate to a desired pressure, are fed from the control device 20. In place of a variable pressure regulator there can be used several regulators which regulate to different pressure levels.
A sensor 22 for ascertaining the methanol content of the fuel, in the case of a mixture of methanol and premium petrol, is arranged in, for example, the tank 1Q--th-e-fuel pressure storage device 13 or one of the feed ducts.
Further magnitudes, for example engine rotational speed n sensed by a rotational speed sensor 23, are fed to the control device 21. The control device 21 delivers control signals to the pressure regulator 14, the injection valve 15 and the spark plug 20.
Further control signals, which are not significant for the embodiment of the invention, are symbolised simply by an output 24.
Both periodic and continuous injection can be realised by the system, illustrated in Fig. 1, for fuel feed to the engine. By means of appropriate operation and control of the system, as described further below, adaptation of the injected quantity can be carried out, since it is possible to adapt the fuel pressure as well as the injection duration so that an optimum injected quantity is obtained. This adaptation can take place in steps or steplessly and it can be varied individually or in common; this applies to the fuel pressure and also to the duration of injection.
As the relationships illustrated in Figs. 2a to 2b indicate, the optimum quantity of fuel is dependent on the composition of the fuel and on different operating conditions. In that case, it must be taken into consideration that, for various reasons, limits are imposed on the possibility of variation of the injection time. The maximum possible quantity of fuel is injected with constantly open injection valve. This quantity thus cannot be increased at constantpressure. In the case of very small opening times, tolerance problems for the injection valves arise.
An example of the optimum quantity of fuel in dependence on the operational state of the engine and on fuel composition is indicated in Fig. 2a. In that case, fuel composition KZU is entered on the abscissa, wherein the point S denotes a fuel composition of 100% premium petrol and the point M denotes a fuel composition in which the methanol or alcohol proportion amounts to 100%. Fuel quantity MK is entered on the ordinate, wherein the point LL denotes idling operation and the point VL denotes full throttle operation.
It can be seen in that case that less fuel is needed for optimum operation in idling at point LL(S) and in full throttle operation
VL(S) with pure premium fuel than for the corresponding conditions
LL(M) and VL(M) and 100% alcohol or methanol.
The actually required quantity of fuel is thus between a minimum value in idling operation with premium fuel (point LL(S)) and a maximum value in full throttle operation with pure alcohol (point VL(M)).
The relationships according to Fig. 2a, were ascertained for a conventional injection system in which either pure premium fuel or pure methanol was used. For such pure fuels, the required quantity of fuel fluctuates by an amount MS for premium fuel -and MM for methanol; this amount is substantially less than the flùctuation X between idling operation with premium fuel LL(S) and full throttle operation with pure methanol VL(M).
Starting from an injection system designed for the conventional operation with either petrol or methanol, the limit values for minimum and maximum quantity of fuel are thus displaced in the direction of greater values when the engine is to be operated with pure fuels as well as also with mixtures. This behaviour results from, inter alia, the different combustion properties of the individual fuel components.
In an intermittent injection system, the injection times, thus the opening times of the injection valves, must be chosen at constant system pressure to be proportional to the required quantity of fuel. In that case, comparatively small injection times result with use of premium fuel in idling operation and relatively large injection times result with operation of the same engine at full throttle and the use of methanol as fuel.
This is clarified by Fig. 2b. In that case, the injection time tE is entered as a function of fuel composition KZU, wherein the point S again symbolises pure premium fuel and the point M pure methanol. Idling operation and the full throttle operation are against characterised by LL and VL, respectively. Similar relationships result as for Fig. 2a. The spacing between LL(S) and
VL(M) is again significantly greater than between LL(S) and VL(S) or between LL(M) and VL(M). Since, as already mentioned, the variation of the injection time cannot exceed certain limits due t6 different causes, the injection time as well as injection pressure are proposed to be varied in an inject ion system in dependence on the fuel composition registered by a sensor.
For example, an increase in the fuel pressure can be undertaken in dependence on the methanol content of the fuel and the variation of the injection- times as a function of operational states. Equally, the injection time can be varied in dependence on the exhaust gas composition. The advantage is then that the injection times are again reduced to the hitherto usual operating range and the adaptation to the different fuel properties or compositions is nevertheless possible.
The range of variation of the injection time tE at constant fuel pressure is illustrated in Fig. 2c. In that case, the injection time tE is again entered as a function of the fuel composition KZU. It can be recognised that the operating range to be covered by X between LL(S) and VL(M) is reduced substantially by comparison with the range according to Fig. 2b. This reduction is achieved in that fuel pressure in the case of high fuel requirement is increased by means of the variable pressure regulator or, as the case may be, by switching from one to another pressure regulator.
achieved in that fuel pressure in the case of high fuel requirement is increased by means of the variable pressure regulator or, as the case may be, by switching from one to another pressure regulator.
The variation of pressure and injection duration can take place in different ways, for example as indicated below:
The fuel composition is measured by a suitable sensor at the beginning of each starting operation of the engine. A pressure regulator, which is adjustable stepiessly or in steps, in the system is so controlled in dependence on the alcohol proportion that the desired system pressure results. In place of an adjustable pressure regulator, several non-adjustable pressure regulators can be used, each of which produces a different system pressure. In this case, a particular one of these pressure regulators is activated by the control device in dependence on the proportion of alcohol.
The measurement of the fuel composition can also take place in running operation of the engine, with tank-filling operations being recognisable. In this case, too, a stepless or stepped adaptation of the system pressure is possible.
Alternatively or additionally to the measurement, the fuel composition and thereby the necessary system pressure can be adapted or learned from, for example, analysed exhaust gas composition.
Measurement and adaptation methods can in that case also be combined to determine the suitable system pressure.
For each possibility, the adaptation of the system pressure on the basis of changing fuel composition is a comparatively slow process. Thereagainst, the injection time will be varied as second magnitude in the system when response is required to rapid changes in the fuel requirement of the engine.
Claims (13)
1. Fuel feed control means for a fuel-injected internal combustion engine operable with fuel charges of different composition, comprising means to determine the composition of fuel supplied to fuel injection equipment of the engine, means to regulate the pressure of the supplied fuel and means to adapt the injection quantity of the fuel by varying the duration of injection and the pressure of the injected fuel.
2. Control means as claimed in claim 1, wherein the fuel charges comprise petrol and a mixture of petrol and methanol, the means to determine -comprising a sensor for determining the proportion of petrol or methanol in the supplied fuel.
3. Control means as claimed in claim 1 or claim 2, the means to adapt being operable to vary at least one of the injection duration and the fuel pressure in a continuous process.
4. Control means as claimed in claim 1 or claim 2, the mens to adapt being operable to vary at least one of the injection duration and the fuel pressure in steps.
5. Control means as claimed in any one of the preceding claims, the means to regulate comprising a pressure regulator controllable by computing means to regulate the pressure to a selectable pessure value.
6. Control means according to any one of claims 1 to 4, the means to regulate comprising a plurality of pressure regulators each for regulating the pressure to a respective pressure value and individually selectable by computing means to carry out the regulation of the pressure.
7. Control means as claimed in claim 5 or claim 6, the coupling means being part of a control device controlling operation of the fuel injection equipment.
8. Control means as claimed in any one of the preceding claims, the means to adapt being arranged to carry out adaptation in dependence on the operational state of the engine.
9. Control means as claimed in any one of the preceding claims, the means to adapt being arranged to carry out adaptation in dependence on the composition of the engine exhaust gas.
10. Control means as claimed in any one of the preceding claims, the means to adapt being arranged to vary the duration of injection in response to rapid change in the fuel feed requirement of the engine.
11. Control means as claimed in any one of the preceding claims, the means to adapt being arranged to vary the fuel pressure in dependence on the determined fuel composition.
12. Control means substantially as hereinbefore described with reference to the accompanying drawings.
13. A fuel-injected internal combustion engine provided with fuel feed control means as claimed in any one of the preceding claims.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4241821 | 1992-12-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9325289D0 GB9325289D0 (en) | 1994-02-16 |
| GB2273374A true GB2273374A (en) | 1994-06-15 |
Family
ID=6475028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9325289A Withdrawn GB2273374A (en) | 1992-12-11 | 1993-12-10 | Fuel feed control means for an engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH06213029A (en) |
| FR (1) | FR2699225A1 (en) |
| GB (1) | GB2273374A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1306537A2 (en) * | 2001-10-23 | 2003-05-02 | Robert Bosch Gmbh | Method and apparatus for controlling an internal combustion engine |
| FR2928701A1 (en) * | 2008-03-12 | 2009-09-18 | Peugeot Citroen Automobiles Sa | Alcohol enriched fuel mixture i.e. flex-fuel mixture, external injection method for motor vehicle's engine, involves closing intake valve and injecting fuel at low pressure in phase that is initiated after determined number of engine cycles |
| WO2016134009A1 (en) * | 2015-02-18 | 2016-08-25 | University Of Southern California | Methanol fuels for internal combustion engines |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404944A (en) * | 1980-08-07 | 1983-09-20 | Nissan Motor Co., Ltd. | Fuel supply system for an injection-type internal combustion engine |
| GB2236872A (en) * | 1989-08-08 | 1991-04-17 | Fuji Heavy Ind Ltd | Controlling dual fuel engine |
| EP0423636A1 (en) * | 1989-10-16 | 1991-04-24 | WALBRO CORPORATION (Corporation of Delaware) | Pressure-responsive fuel delivery system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0810667Y2 (en) * | 1989-04-27 | 1996-03-29 | 株式会社ユニシアジェックス | Fuel injection control device |
| US4955345A (en) * | 1989-06-16 | 1990-09-11 | General Motors Corporation | Multi-fuel engine control with fuel composition responsive fuel viscosity correction |
-
1993
- 1993-11-17 FR FR9313726A patent/FR2699225A1/en active Pending
- 1993-12-02 JP JP5302428A patent/JPH06213029A/en active Pending
- 1993-12-10 GB GB9325289A patent/GB2273374A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404944A (en) * | 1980-08-07 | 1983-09-20 | Nissan Motor Co., Ltd. | Fuel supply system for an injection-type internal combustion engine |
| GB2236872A (en) * | 1989-08-08 | 1991-04-17 | Fuji Heavy Ind Ltd | Controlling dual fuel engine |
| EP0423636A1 (en) * | 1989-10-16 | 1991-04-24 | WALBRO CORPORATION (Corporation of Delaware) | Pressure-responsive fuel delivery system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1306537A2 (en) * | 2001-10-23 | 2003-05-02 | Robert Bosch Gmbh | Method and apparatus for controlling an internal combustion engine |
| EP1306537A3 (en) * | 2001-10-23 | 2005-11-16 | Robert Bosch Gmbh | Method and apparatus for controlling an internal combustion engine |
| FR2928701A1 (en) * | 2008-03-12 | 2009-09-18 | Peugeot Citroen Automobiles Sa | Alcohol enriched fuel mixture i.e. flex-fuel mixture, external injection method for motor vehicle's engine, involves closing intake valve and injecting fuel at low pressure in phase that is initiated after determined number of engine cycles |
| WO2016134009A1 (en) * | 2015-02-18 | 2016-08-25 | University Of Southern California | Methanol fuels for internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2699225A1 (en) | 1994-06-17 |
| JPH06213029A (en) | 1994-08-02 |
| GB9325289D0 (en) | 1994-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |