Abstract: A fuel injection system wherein a microcomputer carries out an operation of a fuel injection period using a generator mounted on an internal combustion engine as a power supply is provided, which is capable of preventing excessive feeding of fuel to the engine during restarting of the engine to ensure smooth restarting of the engine. The fuel injection system includes a charge storing circuit for carrying out charging of a charge storage element during initial starting of the engine, a discharge circuit for permitting discharge of the charge storage element to be carried out over a long period of time, and a signal generating circuit for generating an initial starting signal when the amount of charges in the charge storage element is below a predetermined level and a restarting signal when the amount reaches the predetermined level or more.

Abstract: A cold start fuel control system as provided for an internal combustion engine of the type having at least one combustion chamber, an intake manifold and a source of fuel. A fuel vapor canister has an interior chamber fluidly connected to the source of fuel and a normally closed shut-off valve fluidly connected between the canister and ambient air. A normally closed purge valve is then fluidly connected in series between the interior of the canister and the intake manifold. The system also includes a cold start fuel injector having an inlet connected to the fuel source and an outlet open to the intake manifold or, optionally, to the interior of the fuel vapor canister. During a cold start engine condition, fuel is supplied as needed from both the fuel vapor canister and cold start injector by activating the cold start injector and simultaneously opening the purge and shut-off valves in synchronism with the engine intake cycle(s).

Abstract: An electronically controlled fuel injection system for a snowmobile engine utilizing a battery with the fuel injection system having an electronic control unit connected to the battery for operating the system. The engine has an alternator provided for producing an electrical output in response to rotation of the engine. A control switching means is provided for selectively supplying electrical energy to the battery and the control unit upon detecting electrical current from the alternator so that power is supplied to the electronic control unit whenever the engine is in a starting operation either by a rope pull starter or by activating an electric starter.

Abstract: A control system and method to correct for variations in distillation point of different fuels inducted into an engine (40). Engine rotations or portions thereof are counted until engine start (100-110). A fuel type correction signal is generated from the count (200-212) which then corrects a fuel delivery signal (612-624).

Abstract: A process for supplying fuel to an internal combustion engine of the multi-cylinder type with controlled fuel injection and comprising a controlled fuel vapor recovery system. During predetermined operating phases of the engine, the fuel injection is stopped for a given period, while the fuel vapors trapped in the recovery system are recycled into an intake circuit of the engine.

Abstract: The air/fuel ratio of an intake mixture of an internal combustion engine becomes excessively rich due to fuel leaked from the fuel injection valve into the intake system during a period from shut-down until restart. To overcome the resultant poor starting, the amount of leakage is estimated based on the engine temperature at shut down, and an elapsed time from shut-down until restart which is determined for example based on a difference between the engine shut-down temperature and the engine temperature at restart. The start-up fuel injection amount or the start-up intake flow rate is then corrected corresponding to this leakage amount.As a result, since a suitable start-up air/fuel ratio can be obtained in spite of fuel leakage from the fuel injection valve into the intake system, good engine starting can be ensured.

Abstract: A fuel control system is provided for an internal combustion engine having at least one combustion chamber, an intake air passageway, a multipoint fuel injector associated with each engine combustion chamber and a cold start fuel injector having a fuel outlet open to the intake air passageway. An air valve has an air inlet fluidly connected to the intake air passage and an air outlet fluidly connected to the cold start fuel injector. This air valve movable between an open position and a closed position where in the open position, air flow through the air valve is directed to the cold start fuel injector. During a cold start engine operating condition, air flow through the air valve and cold start fuel injector enhances fuel atomization of the fuel from the cold start fuel injector thereby reducing the desirable engine emissions, and particularly, hydrocarbon engine emissions.

Abstract: An engine control is provided for compensating the fuel delivery to an internal combustion engine as a function of the energy content of the fuel. The engine control includes a fuel temperature sensor connected to an electronic controller. A memory device including a standard fuel delivery map stored therein is connected to the electronic controller. The electronic controller calculates a compensated fuel delivery map as a function of the standard fuel delivery map and the fuel temperature, and the controller issues a fuel delivery command based on the compensated fuel delivery map.

Abstract: A fuel injection system for a two-stroke cycle engine capable of keeping an air-fuel ratio of an air-fuel mixture for combustion at a low engine speed optimum to improve startability of the engine in a cold district. The system includes a low-speed basic injection time increment setting unit for setting a low-speed basic injection time increment Tfi depending on an engine speed N and a throttle opening .alpha., a low-speed crankcase temperature correction factor setting unit for setting a low-speed crankcase temperature correction factor KLc, time correction factor setting units for setting a time correction factor Kt which is decreased with an increase in crankcase temperature, as well as with lapse of time, and a low-speed injection time increment setting unit for setting a low-speed injection time increment TiL by multiplying the increment Tfi by the correction factors KLc and Kt.

Abstract: A method of catalyst purging (run-time) fuel lean-out for an internal combustion engine including the steps of determining whether the engine is in a throttle deceleration condition or a MAP deceleration condition, sensing a speed of the engine, determining whether the current sensed engine speed is above a predetermined speed if the engine is in a throttle or MAP deceleration condition, determining a magnitude of a run-time lean-out multiplier (RTLEAN) value if the current sensed engine speed is above the predetermined speed, and applying the determined RTLEAN value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.

Abstract: An apparatus for detecting a volatility of fuel supplied to an internal combustion. A target mean effective pressure is calculated based on sensed engine operating conditions. An actual mean effective pressure is calculated based on a sensed cylinder pressure. The fuel volatility is calculated as a function of the calculated target mean effective pressure and the calculated actual mean effective pressure.

Abstract: Electric power is generated with rotation of a flywheel and crankshaft rotated by a starting operation of a recoil starter and supplied for driving and controlling a fuel injection valve, the fuel injection valve is supplied with fuel pressurized by a mechanical pump driven in an interlocked relation to the crankshaft, and control means provides an "open" instruction to the fuel injection valve driving means in response to at least one of a voltage appearing on a reset input terminal of a microcomputer for controlling the fuel injection valve during resetting of the microcomputer. After completion of the resetting of the microcomputer, the fuel injection valve is controlled so as to cause fuel injection during "open" valve intervals based on a predetermined fuel injection pattern at predetermined fuel injection timings.

Abstract: A flexible fuel compensation system including a method of start fuel decay. The start fuel decay method interpolates decay rates based on the coolant temperature. The decay rate is then subtracted from the decayed start fuel pulsewidth until it reaches a predetermined value.

Abstract: In a microprocessor-based electronic engine control system or ECU for electronic fuel injection which determines the amount of fuel to be injected on the basis of engine RPM and throttle opening position, modified by factors derived from sensed conditions of the engine and the environment, a single, long pulse width priming fuel pulse is injected upon cranking the engine. The priming fuel pulse is selected as an inverse function of engine temperature and delivered to the throttle bodies within a first period of time after the engine is initially turned over. The engine revolutions are counted until the engine starts. If the engine fails to reach a predetermined RPM for a predetermined time period (indicating that it has been successfully started) within a certain number of revolutions of the crankshaft, then a second priming pulse is delivered. The pulse width of the second pulse is independent of the pulse width of the first priming pulse but is again dependent on the engine temperature.

Abstract: It is determined whether an engine for a flexible fuel vehicle is in a start enabling state based on alcohol concentration of fuel supplied to the engine. When it is determined that the engine is in the start enabling state, a heater for vaporizing fuel is energized. Current flowing in the heater is compared with a reference current representing completion of warmup of the engine. When the current becomes smaller than the reference current, the heater is de-energized, and the fuel is injected to start the engine.

Abstract: Re-starting an engine becomes easier by decreasing fuel amount to inject into the cylinder in accordance with the temperature of the engine and the time while the engine stops. The decreasing amount of the fuel is determined in dependency on whether the shut-off relay is ON or OFF, whether the stopping time range is within the predetermined value, or whether the coolant temperature is below the set value or not. The coefficient of the basic fuel injection amount is corrected by referring to the standard value stored in maps. Therefore, there is no occurrence of over-rich of the air-fuel ratio and malfunction of the spark plug, so that the engine can be smoothly restarted in any operating condition.

Abstract: A fuel injection device comprises electrically controlled fuel injectors, each opening into an air induction passage upstream of a respective intake valve of a combustion chamber. Each injector has an air-fuel mixture chamber. A throttle valve in the induction passage is constructed to close it when in a minimum opening position. An air line connects the induction passage to the mixture chambers and has an additional air electrically controlled valve. A supplemental electrically controlled valve is branched out of the line and opens into the induction passage downstream of the throttle valve. An electronic unit controls the injectors and the supplementary valve and opens the supplemental valve during cold start of the engine at low temperature and during operation of the engine as a brake at normal temperature, high speed and with the throttle valve closed.

Abstract: A flexible fuel vehicle has an engine with a fuel injector for injecting mixed fuel of gasoline and alcohol into the engine. The operation of a starter motor of the engine is inhibited for a set time period before injecting the mixed fuel from the fuel injector and the mixed fuel is circulated flowing from the fuel pump to the fuel tank for the set time period so as to sufficiently and homogeneously mix the gasoline and alcohol in the mixed fuel.

Abstract: A fuel injection control system for an internal combustion engine which can eliminate lean misfiring and rich misfiring at asynchronous injection and exhausting of non-combustioned HC. When the asynchronous injection is performed at engine cranking or at acceleration, a judgement is made as to whether the injected fuel will be divided by closure of an intake valve. When division is not detected, fuel injection is performed in normal manner. When division is detected, rate of the fuel division is computed. As a result of computation, fuel injection is performed when judgement is made that a predetermined amount of the injected fuel will be introduced into the cylinder. Furthermore, the amount of fuel not introduced into the cylinder is computed to reduce a corresponding amount from a fuel injection amount for the next cycle. On the other hand, when judgement is made that the predetermined amount of fuel will not be introduced into the cylinder, fuel injection does not take place.

Abstract: A flexible fuel compensation system including a method of hot soak fuel enrichment. The hot soak fuel enrichment method includes checking a plurality of enabling conditions. The method also increments of decrements a hot fuel enrichment multiplier depending on conditions of the vehicle. The hot fuel enrichment multiplier is then used to adjust the amount of fuel being sent to the fuel injectors.

Abstract: A fuel injection control system for use in an internal combustion engine having a catalyst in its exhaust path. Each cylinder is provided with a fuel injection valve for injecting fuel thereinto amounting to a reference injection quantity which is set according to a loaded state of the internal combustion engine. Each cylinder is also provided with a spark plug for producing spark ignition therein at each period of reference ignition timing which is established according to the loaded state of the internal combustion engine. The fuel injection control system is provided with a controller which controls the fuel injection valve such as to increase and decrease the reference fuel injection quantity by a different amount per cylinder without a change in the total of the reference fuel injection quantity, and which also varies this fuel increase and decrease according to the loaded state of the internal combustion engine.

Abstract: An electronic engine controller (EEC) controls the delivery of fuel to an internal combustion engine via one or more fuel injectors by generating a base fuel value and modifying it with a transient fuel compensation value. The EEC determines the transient fuel compensation value by measuring a temperature value indicative of the temperature of the induction system of the engine and determining a valve effect value indicative of the effect of intake valve temperature on the vaporization of fuel in the induction system. A transient fuel compensation value is then generated in response to the temperature value and the valve effect value. The base fuel value, generated under any of a variety of known engine control methods, including open-loop control and closed-loop control, is altered in response to the transient fuel compensation value to generate a fuel injector control signal for controlling the amount of fuel delivered by the fuel injectors.

Abstract: In a method and device for controlling a carburetor (1) of an i. c. engine, the A/F ratio thereof is automatically adjusted to a preferred level during varying operating conditions. An adjusting means (5) is continuously actuated by a first control unit (4) of a first control circuit (3) to provide a A/F ratio having a modified dependency on the speed of rotation. An adjusting means (9) is periodically actuated for a short period by a second control unit (7) of a second control circuit (6), said second control unit receiving speed information (8) from the engine (2), to provide a short-term change of the mixture ratio, and the change of speed of rotation caused thereby is measured. With regard to the obtained result and stored information the second control unit (7) performs an adjustment of the mixture ratio by a predetermined step towards leaner or richer mixture by actuating an adjusting means (5).

Abstract: An electronic control device for an internal combustion engine having a control unit for detecting a running state of an engine, and which controls a fuel quantity or an ignition timing of the engine in accordance with the running state, where the electronic control device monitors the transient running state of the engine, and includes a fuel property sensor for detecting a fuel property, such that the fuel quantity or the ignition timing is corrected in accordance with the fuel property under the transient running state.

Abstract: An apparatus for detecting an intake air quantity for an internal, combustion engine and method therefor are disclosed in which a passed time from a time at which a power supply to a temperature sensitive airflow meter of a bridge circuit is turned on is measured as t. A CPU of the detecting apparatus retrieves a data on the intake air quantity from a data map storing the data on the intake air quantity, the passed time and output voltage of the temperature sensitive airflow meter to derive the intake air quantity data Q.sub.now. In addition, the CPU adds a value of a change rate of the present mapped data with respect to the previously derived final intake air quantity data Q.sub.-1 which is multiplied by a predetermined coefficient k to Q.sub.now. The result of addition is set as the present final intake air quantity data: Q.rarw.Q.sub.now +k (Q.sub.now -Q-.sub.-1). It is noted that the predetermined coefficient k is varied according to the passed time t.

Abstract: A flexible fuel compensation system including a method of energy content adjustment. The energy content adjustment method will interpolate a multiplier value based on the percent methanol found in the fuel mixture. This multiplier is then used to adjust the injection pulsewidth according to the correct energy content.

Abstract: A charge inlet system for a spark ignited reciprocating internal combustion engine includes a plenum for receiving intake air and having a plurality of intake runners extending to the intake valves of the engine. Fuel flowing through primary fuel injectors is supplemented by fuel provided by a secondary fuel injector in the event that the engine is being started.

Abstract: The fuel injected two-cycle internal combustion engine having an exhaust control valve and direct cylinder injection. The fuel injection timing and duration are increased at starting over idle and the exhaust control valve, which is normally closed at idle and opened at high speed is moved to its high speed condition during starting to assist in starting. In addition, when the engine is returned to an idle condition after racing, the engine idle speed is reduced in steps to prevent stalling and improve return to idle.

Abstract: A method is disclosed for controlling the fuel injection system for an internal combustion engine having a fuel injector for injecting fuel by a series of steps including: determining whether the engine performs stable combustion at the engine start depending on operating conditions of the engine; setting a fuel injection pulse width for the fuel injector in accordance with the operating conditions of the engine; and then generating a first pulse at an intake stroke of the engine and a second pulse at an exhaust stroke of said engine, when the engine does not perform stable combustion at the engine start, a total width of said first and second pulses corresponding to the set fuel injection pulse width.

Abstract: When or just after an engine (1) is started, a starting switch (9) is turned on and a value is set in a just-after-starting counter in a CPU (114). The starting or just-after-starting state is detected. Fuel temperature and fuel properties are detected by a fuel properties sensor (16). The detected values are calculated in the CPU (114). Fuel temperature detection output is corrected, then a filter value or average value is calculated and stored in RAM (114b) in the CPU (114) and just after the engine is started, based on the stored value, driving of a bypass control valve (6) and an injector (12) is controlled and the fuel amount or air amount is controlled for the engine. Thereby, it is enable optimum fuel amount control when and just after an engine is started regardless of the differences in the fuel properties.

Abstract: An internal combustion engine control apparatus is provided which is capable of performing various controls based upon the air quantity immediately after a current heated element of a hot wire air flow meter is heated to a predetermined temperature. When a key switch is rotated to an "ON" position, a large current flows through the air flow meter and the detected intake air quantity greatly exceeds the actual intake air quantity and therefore during the warm up period of the heater, the fuel injection amount is a constant corresponding to the coolant temperature until the engine speed reaches 500 rpm. Likewise during this warm up period, the smoothing processing of the fuel injection quantity is stopped.

Abstract: A fuel injection device increases an increment value of fuel after cut-off of assist air so that the air/fuel ratio for combustion can be held constant to stabilize the idling rotational speed. The device has control means for controlling, based on various detection signals indicative of an engine cooling water temperature, an engine rotational speed, an amount of intake air, etc., a valve-opening time of a fuel injection valve in accordance with a predetermined control program, and also controlling an on/off control valve for cutting off air supplied to fuel atomizing means. Fuel incrementing means increases an amount of liquid fuel supplied to the fuel injection valve depending on opening/closing of the on/off control valve and the temperature of engine cooling water. When the on/off control valve is closed and an engine is in a state of steady operation, the increment value of the liquid fuel supplied to the fuel injection valve can be gradually increased by the fuel incrementing means.

Abstract: A fuel supply apparatus for an internal combustion engine includes a first fuel injector provided for each cylinder of the engine for injecting fuel into an intake pipe of the engine. A second fuel injector is disposed at a location upstream of the first fuel injector for injecting fuel into the intake pipe independently of the first fuel injector. A heater in the form of an electric heating plate is disposed on the inner surface of the intake pipe at a location between the first and second fuel injectors for heating and evaporating the fuel injected from the second fuel injector.

Abstract: A system and method for operating an automotive internal combustion engine during start-up includes steps of sampling at least one operating parameter of the engine, comparing the sampled parameter to a predetermined range for such parameter, and in the event that the sampled parameter falls outside of the predetermined range, operating some of the engine's cylinders according to a base fuel schedule, while reducing the time-averaged amount of fuel provided to the remaining cylinders. Once the sampled parameter falls within the predetermined range, all cylinders of the engine will be operated according to the same fuel schedule.

Abstract: A fuel injection quantity control system for starting a two-cycle engine. The control system calculates an initial fuel injection quantity by correcting a basic fuel injection quantity according to a subtrahend to be applied to a time factor which is determined depending on a cranking time. The time factor is differently set for a first engine start operation and second or later engine start operation, thereby improving restart of the engine.

Abstract: A starting fuel supply control system for an internal combustion engine having a purging passage connecting between a canister and an intake passage for purging a mixture of evaporative fuel from a fuel tank and air therethrough into the intake passage, and a purge control valve arranged across the purging passage for controlling the flow rate of the evaporative fuel to be supplied to the intake passage. An ECU detects a flow rate of an evaporative fuel component in the mixture flowing in the purging passage, and sets an amount of fuel to be supplied to the engine at the start thereof, based upon the detected flow rate of the evaporative fuel component.

Abstract: A method and system are provided for modifying a control signal of a fuel injector of a fuel delivery system wherein at least one shut-down temperature signal representing the temperature of an internal combustion engine is utilized together with other input signals to calculate a net amount of heat transferred to the fuel delivery system. The signals are utilized to calculate a correction factor, which correction is used to modify the control signal for the fuel injector. Preferably, two shut-down temperature signals are utilized, an engine coolant shut-down temperature signal and an air charge shut-down temperature signal to calculate the net amount of heat transferred. The modified control signal provides accurate control of the fuel injector by compensating for the increased volatility of the heated liquid fuel.

Abstract: A system and method for starting an internal combustion engine having multiple cylinders, each cylinder including an activating and deactivating system for independently activating and deactivating, each cylinder, one cylinder being initially activated to start the engine and the remaining cylinders being deactivated until ignition is sensed in the activated cylinder.

Abstract: In a fuel control device for an internal combustion engine wherein an estimated pressure (Pi) in the engine intake manifold is calculated by digital filtering an output signal from a H/W sensor by making use of a difference equation, an air flow rate (Qc) at the engine cylinder port is estimated based upon a detected engine rotating number (N) and the calculated estimated pressure (Pi) by retrieving a value of air flow rate from a map defined by the engine rotating number (N) and the estimated pressure (Pi) in the engine intake manifold. Then, the fuel quantity (Tp) to be injected is calculated based upon a detected engine rotating number (N) and the estimated air flow rate (Qc) at the engine cylinder port. However during the engine starting period, a learned estimated pressure in the engine intake manifold is used instead of the calculated estimate pressure (Pi) in the engine intake manifold to determined the retrieved estimated air flow rate (Qc).

Abstract: A fuel injection control system for an internal combustion engine equipped with a heater for heating an air-fuel mixture in cold engine start. In the system, the timing to cease injection is first obtained by the coolant temperature and the engine load. The value is then deferred by an amount if the heater is turned on. The amount increases as the heater on-time increases. Then an injection period is added to the timing to cease injection and another timing to commence injection is determined. Thus, the injection timing is deferred if an air-fuel mixture is heated so as to minimize the residence time of the heated fuel. This ensures that the fuel will be quickly drawn to the cylinder to be burnt completely and the composition of the gas is thus improved.

Abstract: A starting time engine speed control device is provided for controlling fuel to be injected by correcting an amount thereof within a predetermined period of time after the start of an internal combustion engine using a starting time fuel injection control with respect to a basic fuel control. The engine is mounted on a vehicle and has a clutch mechanism which is coupled when engine speed exceeds a coupling engine speed, and the starting time engine speed control device includes a control arrangement adapted to control the fuel to be injected by gradually increasingly correcting the amount thereof in accordance with increasing engine speed up to said coupling engine speed using the starting time fuel injection control.

Abstract: The invention provides a circuit for electronic control of an internal combustion engines including injection valves that can be activated electrically as a function of regulated variables such as crankshaft position, engine speed, exhaust-gas composition and engine torque. The circuit includes an electronic control unit with means to activate the intake valves, exhaust valves, injection valves and ignition device as a function of ignition duration and ignition timing. The control unit also includes a start-up program with which ignition sequences of the engine cylinders, intake valves, injection valves and ignition device can be activated for any desired cylinder position of an engine-start-up process. The circuit further includes a program memory, an engine-standstill detection circuit, and an absolute-value angle transmitter to which the engine-standstill detection circuit is responsive.

Abstract: An electronically controlled fuel injection control system for an automotive internal combustion engine equipped with a hot wire mass air flow sensor to detect an intake air flow amount. The fuel injection control system is comprised of a microcomputer adapted to control the amount of fuel to be injected from a fuel injector mainly in accordance with an engine speed and the intake air flow amount. In the control by the microcomputer, a compensation for time lag is applied onto an intermediate variable which is calculated from the intake air flow amount and used for calculating the fuel injection amount.

Abstract: An air-fuel ratio control method for an internal combustion engine. The air-fuel ratio of an air-fuel mixture supplied to the engine is feedback-controlled to a desired air-fuel ratio depending on operating conditions of the engine in response to output from an exhaust gas ingredient concentration sensor. The desired air-fuel ratio is settable to a value leaner than a stoichiometric air-fuel ratio when the temperature of the engine is above a predetermined reference value. The method comprises the steps of detecting a reduction ratio to which the transmission has been set, and changing the predetermined reference value of the temperature of the engine depending on the detected reduction ratio. The predetermined reference value of the temperature of the engine is set to a lower value as the reduction ratio of the transmission is smaller.

Abstract: A system for controlling supply of fuel to a hybrid fuel powered engine during starting. The system has a sensor detecting the alcohol concentration of the fuel, a device for calculating an alcohol correction factor from the detected alcohol concentration, a device for correcting a basic amount of fuel supply in accordance with the alcohol correction factor, a device for increasing or decreasing the factor in increments of a magnitude determined on the basis of the engine coolant temperature once per interval determined on the basis of the engine coolant temperature, and a device for reversing the direction of the increments each time the factor reaches an upper limit value or a lower limit value, whereby the factor is swept over a prescribed range until the engine starts.

Abstract: Fuel supply in an ultrasonic atomizer is conducted according to a fuel increment ratio pattern in which the increment of fuel in fuel increment control for starting and warming up is 70% or less of that in a typical conventional pressure injection valve system, thereby improving startability, accelerability and fuel consumption rate and further enabling a reduction in exhaust emissions. When the engine is started in low-temperature conditions, the fuel is supplied by continuous injection to make uniform and reduce the mean diameter of droplets of atomized fuel, thereby improving the ignitability and startability. The fuel injection start timing is varied in accordance with the combustion chamber temperature at the time of starting the engine, i.e.

Abstract: Selective compensation for reductions in fueling capacity normally associated with extreme fuel vaporization rates in the fuel delivery means of vehicle engines, by improved estimation of the conditions normally precedent to such extreme fuel vaporization rates.

Abstract: An air-fuel ratio control system for an internal combustion engine using an alcohol blended fuel, in which an alcohol concentration-dependent correction coefficient for use in calculating an amount of fuel supplied to the engine is calcuated in response to concentration of alcohol in the fuel defected by an alcohol concentration sensor. An average value of the correction coefficient is calcuated depending on operating conditions of the engine. The amount of fuel supplied to the engine is calculated by the use of the average value of the correction coefficient to thereby control the air-fuel ratio of an air-fuel mixture supplied to the engine.

Abstract: An electronic fuel injection device for an internal combustion engine, wherein operating conditions of the internal combustion engine is detected; a fuel injection value for the internal combustion engine is calculated based upon the detected operating conditions; the calculated fuel injection value is corrected by a fuel correction value during engine start which is stored in a memory; a fuel injection pulse for a fuel injector corresponding to the corrected fuel injection value during engine start is generated; a start time of the internal combustion engine started by the fuel injection determined by generated fuel injection pulse; a start time rank for the detected start time is assigned depending upon the length of the start time; a new fuel correction value is calculated by summing up variables of factors in Table 1 which influence the air/fuel ratio during engine start and are determined for every start time rank based upon the assigned start time rank; the fuel correction value used for the present eng

Abstract: A fuel injection controlling device for a two-cycle engine comprising an air manifold; a throttle valve; a fuel injector; a fuel supply system including a fuel pump; a battery voltage sensor; an air temperature sensor; an engine speed sensor; a timing sensor; a barometric pressure sensor; a throttle position sensor; a first data processor for receiving and processing sensing signals for determining fuel injector duration and timing and fuel pump operating speed; a first data processor temperature sensor for sensing the relative temperature of certain electronic components in the first data processor; a heater operatively associated with the first data processor electronic components for selectively heating the electronic components; and a second data processor operable independently of the first data processor for receiving an electronic component temperature sensing signal and for generating a control signal to the heater responsive thereto for heating the components when the temperature thereof is below a p