Boots – shoes – and leggings
Patent
1989-07-05
1991-10-08
Lall, Parshotam S.
Boots, shoes, and leggings
36443104, 36442404, 731173, 73119A, G06F 1520
Patent
active
050560263
DESCRIPTION:
BRIEF SUMMARY
This invention relates to improvements in electronic fuel injection computers.
BACKGROUND OF THE INVENTION
Motor vehicles are now commonly manufactured with electronic fuel injection (E.F.I.). There are good reasons for the move to E.F.I. A good E.F.I. system will produce considerably more power using less fuel and also generate less pollution than carburetion on the same vehicle. In an age of high fuel costs, energy conservation and restrictive pollution laws, the trend towards E.F.I. will continue.
Present E.F.I. computers however are "black boxes" which are dedicated to a particular engine model. They cannot be readily serviced or interchanged with other types of vehicles. This has the disadvantage that conventional naturally aspirated engines cannot be easily converted to E.F.I. Further, in factory equipped E.F.I. vehicles any subsequent modifications to the engine such as for example turbo charging or increase in the compression ratio, cannot be matched by the required alteration to the E.F.I.
SUMMARY OF THE INVENTION
It is therefore an object of this invention to ameliorate the aforementioned disadvantages and accordingly a user accessible E.F.I. computer is disclosed which is modifiable to fit a range of engine configurations.
Preferably an E.F.I. computer according to this invention is user accessible using an external personal computer. Such E.F.I. computer can thus be initially programmed and/or modified to produce any fuel delivery curve required by the user.
Preferably an E.F.I. computer according to this invention is also adaptable to provide a "staged" fuel injection curve such as that required by forced induction engines.
Preferably a computer according to this invention is also adapted to record or "data log" various engine parameters such as speed, fuel delivery etc. in a manner whereby it can be later read and analysed by the user.
BRIEF DESCRIPTION OF THE DRAWINGS
One preferred embodiment of this invention will now be described with reference to the attached representation in which:
FIG. 1 is a block diagram showing the main components of an E.F.I. computer and engine sensors.
FIG. 2 is a software flow chart of the E.F.I. computer of FIG. 1.
FIG. 3 is a software flow chart of a personal computer used to program the E.F.I. computer of FIGS. 1 and 2.
FIG. 4 is an example of a fuel inspection bar chart as relating to a typical 4 cylinder automobile.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
There are three distinct parts to the programmable fuel injection computer according to this invention. These are the hardware (FIG. 1) which remains in the car, the software (FIG. 2) which drives this hardware and the software (FIG. 3) which allows the system to be configured to suit a particular vehicle and which runs on an external personal computer.
The software which directly controls the hardware has two parts. The main program 1 is a serial communication routine which services the external requests of a control program running on the personal computer. This communications program allows the system information and variables to be displayed and accessed by a user using the personal computer. The serial communication program acts as a slave to the program in the personal computer. If the engine being controlled is not running then the system continually runs the serial communication program.
The second part of the software manages the engine. This software 2 is called as the result of an interrupt trigger 2A by either of two engine position sensors. These trigger pulses interrupt the serial communication program and start the engine management program. The engine management program processes all of the engine related information and sets up output compare timers to correctly control both the fuel injectors and ignition timing. Once these functions have been carried out the program flow returns to the serial communication program until it is again interrupted.
As well as these two main programs the in-car computer software has an optional routine 2B which controls an external key-pad. Its p
REFERENCES:
patent: 4084240 (1978-04-01), Lappington
patent: 4334425 (1982-06-01), Crane
patent: 4376428 (1983-03-01), Hata et al.
patent: 4398259 (1983-08-01), Levine
patent: 4497057 (1985-01-01), Kato et al.
patent: 4677558 (1987-06-01), Bohmer et al.
patent: 4725955 (1988-02-01), Kobayashi et al.
patent: 4738238 (1988-04-01), Ohishi
patent: 4839811 (1989-06-01), Kanegae et al.
patent: 4866618 (1989-09-01), Tamura et al.
Mitchell Steven J.
Mitchell William R.
Lall Parshotam S.
Yacura Gary D.
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