Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Honda Giken Kabushiki Kaisha

Masashi Nakamura

Motohiro Shimizu

Kouichi Asai

Kenji Kamimura

Tomoki Fukushima

Kenichiro Nakamura

Shigeru Fujii

Tadafumi Hirose

Ryo Saito

Kazufumi Muronoi

Takahiko Shimizu

Hitoshi Abe

Tsutomu Hirano

Noriya Shimozato

Minoru Tamura

Hideaki Tajiri

Tadahisa Masatani

Tutomu Hirano

Mitsuru Kojima

A choke valve is controlled finely suited to the running state of an engine. A throttle valveand a choke valveare provided in series on an intake pipe, and the opening degree of the choke valveis controlled by a stepping motorA choke valve opening degree upon start of engine (start opening degree) and a driving pulse rate of a stepping motorare determined depending on the engine temperature. When lower than the engine temperature TL, the pulse rate is set at first rate, or the lowest rate in a specified range. Depending on the engine temperature, the pulse rate is set higher gradually up to second rate TH. When releasing the choke gradually in warm-up operation, the pulse rate is lowered so as to obtain a choke opening degree of high precision by a high torque.

Automatic choke

A choke valve is controlled finely suited to the running state of an engine. A throttle valveand a choke valveare provided in series on an intake pipe, and the opening degree of the choke valveis controlled by a stepping motor. The choke valve opening degree upon start of engine (start opening degree) is determined depending on the engine temperature. The stepping motoris initialized at the fully closed side of the choke valvewhen the power source for starting the engine is turned on. The start opening degree of the choke valve is judged to be closer to the fully closed side or fully opened side, and the stepping motoris initialized at the fully closed side if judged to be close to the fully closed side, and at the fully opened side if at the fully opened side.

A choke valve is controlled finely suited to the running state of an engine. A throttle valveand a choke valveare provided in series on an intake pipe, and the opening degree of the choke valveis controlled by a stepping motor. A choke valve opening degree upon start of engine (start opening degree) is determined depending on the engine temperature. The start opening degree judging unitjudges whether the start opening degree is closer to the fully closed side or fully opened side. The motor initializing unitinitializes the stepping motorat the fully closed side or the fully opened side if the start opening degree is at the fully closed side or the fully opened side, respectively. After choke release, a driving signal in a specified number of steps is issued periodically.

A plurality of control power sources of voltage specifications different from one another are constructed. A generator output converted by a converter into a DC current is converted by an inverter into an AC current of a predetermined frequency. The generation output is rectified by second rectifier circuits and a capacitor and is then input to an RCC. The RCC constitutes a self-excited oscillation circuit, energy is stored into a transformer in an ON time of a transistor corresponding to an oscillation frequency thereof, and the energy is transferred to a secondary side in an OFF time. In the secondary side of the RCC, windings are formed corresponding to the number of required power sources. One group of windings forms both positive and negative power sources of a control power source, and another group of windings forms a power source for an FET driver.

Inverter controlled generator apparatus

A multiplex connection inverter apparatus is provided having two separate inverters connected to each other for declining current ripples which may be generated when the superposing of the alternating current outputs with their carrier signal components held in phase with each other. The alternating current outputs of the two inverters are set opposite in the phase while their carrier signal components are in phase with each other. For connecting in parallel, the positive port of one of the two inverters is connected to the negative port of the other inverter to constitute one of two output terminals while the negative port of the one inverter is connected to the positive port of the other inverter to constitute the other output terminal. For connecting in series, the negative ports of the two inverters are connected to each other while the positive ports of the same are assigned as two output ports.

Multiplex connection inverter apparatus

An electronic engine-governor control is carried out using no arithmetic tables and thus relieving a load to the CPU. A throttle opening is controlled with a control quantity to suppress a difference between the actual revolutions and the target. Calculator A is provided for calculating the difference D between the current revolutions and the target Ne(tgt). The difference D is corrected with an adjustment A based on a difference between the current revolutions Ne(0) and the previous revolutions Ne(&minus;1)and an adjustment B based on a difference between the previous revolutions Ne(&minus;1) and the revolutions before previous revolutions Ne(&minus;2). Calculator B is provided for calculating an adjustment E in relation to a load from the throttle opening &thgr;TH(0) and the target Ne(tgt). Calculator C is provided for calculating D/E, the throttle controlling signal P&thgr;TH.

Engine revolution controlling apparatus

The throttle opening setting value provided from a throttle controller may exceed the actual controllable range of the throttle opening. The value stored in an output voltage setter is read out in response to its throttle opening setting value and transferred to a correction signal generator . The generator supplies a correction signal determined by the output voltage setting to a modulator . PWM signal is transferred to an inverter for determining the output voltage. When receiving the opening setting value indicative of overloading, the output voltage setter releases a smaller value to decrease the output of the generator.

Engine generator

Inverter controlled generator set

The present invention provides an engine generator which is small in the size but high in the efficiency of power generation and a controller for the engine generator. The present invention is implemented by a power generator G driven by an engine E, a starter motor M for cranking the engine E, and a controller for supplying various electric loads including the starter motor M with a driving voltage which depends on the power released from the generator G and a battery

Engine generator, controller, starter apparatus, and remote control system for the engine generator

An inverter is controlled by feeding back an output voltage waveform for stabilizing the output and circuitry simplification. The output waveform of an inverter is supplied to a CPU to generate a correction of the reference sine waveform signal RS which is then used for producing a desired form of PWM signal. The output waveform is A/D converted by a converter which comprises two modules and before transferred to a processor . The output waveform is received by two channels of each of the modules and . As the input channels are sampled in a sequence, their waveforms are A/D converted at intervals of a time in each sampling period and can thus be improved in the resolution of A/D conversion. Since the modules and are operated at different timings lagged slightly from each other, the resolution can be increased.

Inverter apparatus for controlling a generator output to sign-wave voltage

It is featured that a generator can respond to a variation in the load with a generous margin regardless of the its temperature. The output current of the generator is rectified with a converter consisting mainly of a thyristor bridge. A direct current output of the converter is then converted by an inverter into an alternating current at a commercial frequency and then connected to the load . The engine speed is controlled so that the on state angle of the thyristors in the converter is maintained to a target angle. Since the target angle is set within a range not higher than the maximum limit, the generator can constantly run with a generous margin and readily respond to a variation in the load. The target angle can be modified depending on the temperature of the generator in order to inhibit the engine from being overloaded and its speed from increasing excessively.

Engine operated generator

Engine speed controlled generator set having an inverter and direct current output smoothing capacitor

A generator system arranged to respond to a variation in the load with a generous margin regardless of a change in the output of the generator or the engine due to degradation with the passage of time. The output current of the generator is rectified by a converter composed of thyristors in a bridge configuration of which the direct current output is converted by an inverter into an alternating current at a commercial frequency and connected to a load. The engine speed is controlled so that the conduction angle of the thyristors in the converter can be held at a target degree. As the target degree stays within a range smaller than the maximum limit, the generator runs with a margin, thus readily responding to a variation in the load. When the throttle opening is excessively opened, the target conduction angle is decreased to increase a target speed of the engine, hence inhibiting the engine from being overloaded and running at an excessive higher speed.

Two generation systems,each including inverter,are switched over between series connection and parallel connection by switching section,. Reference waveform signals are mutually communicated between the two generation systems through communication lines,. When a phase difference between these two reference waveform signals is within a predetermined range, the inverters are driven to generate an output alternating current. One of the conduction angles of thyristors,in two converters,which is larger than the other is inputted to a deviation detector,. Based on a deviation of the conduction angle inputted from a target conduction angle, an updated target rotational speed is set in a calculator,. A throttle controller,controls a throttle opening angle so that an actual rotational speed converges into the target rotational speed. A ground fault is judged based on a potential difference across one node point in a first arm, connected to the earth and the other node point in a second arm of a resistance bridge provided across a pair of output terminals of either one of the inverters.

Generator and generator apparatus

An engine operated generator is arranged to constantly respond to a change in the load with a margin of power. The output current of the generator 1 driven by an engine 2 is rectified by a converter 3 composed of a thyristor bridge structure. A direct current released from the converter 3 is converted by an inverter 4 to an alternate current at a commercial frequency and connected to a load 5. A thyristor driver circuit 9 controls the conduction of thyristors so that the voltage at the input of the inverter 4 is constant. A fuel flow controller 10 detects the conduction angle of the thyristors and the revolution of the engine 2 is controlled so that the conduction angle is converged on a target conduction angle. Since the target conduction angle is set within a predetermined range smaller than the maximum conduction angle, the generator is maintained with margins of its output and can thus provide a stable level of voltage and respond quickly to a change in the load.

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Saitama, Japan

Masashi Nakamura