Japan Electronic Control Systems Company, Limited

Unisia Jecs Corporation

Sanden Corporation

Nissan Motor Company Limited

Other

Japan Electronic Control Co., Ltd.

Kazumitsu Kobayashi

Masaru Kuribara

Kiyoshi Takeuchi

Syunji Komatsu

Katsuyoshi Kawachi

Toru Takeshita

Akira Kiyomura

Shoichi Furuhama

Hideki Kamioka

Masahiko Shimamura

Eiji Okamura

Hidehiko Koyashiki

Yuji Nakajima

Osamu Sakurai

Tomoichi Misawa

Yuichi Hosokawa

Hideki Kano

Kimitaka Yamane

Seiichi Sue

Hiroki Sunou

Yukio Matsumoto

A piston for an internal combustion engine is provided which has at a top surface thereof a cavity for causing a mixture charge drawn from an intake port into a combustion chamber so as to flow with a rotational motion about a horizontal axis to flow toward a spark plug. A combustion chamber structure for an internal combustion engine is also provided.

Piston for an internal combustion engine

A fuel injection control system for an internal combustion engine comprises a plurality of fuel injector valves, a pumping system having a suction valve, a discharge valve, and a high-pressure pump section sucking fuel into a pressurized chamber with the suction valve opened on a suction stroke and for discharging the fuel in the pressurized chamber toward the injector valves with the discharge valve opened on a discharge stroke. A relief passage is connected, at one end, to a lowpressure line upstream of the suction valve. The other end of the relief passage is connected to the pressurized chamber. A fuel-pressure control valve is disposed in the relief passage for regulating a fuel pressure of the fuel injected from each of the fuel injector valves by opening the fuel-pressure control valve only for a specified time duration from a controllable middle stage of the discharge stroke to the end of the discharge stroke.

Fuel injection control system

The electrodes of an electrostatic capacitor which is used to determine the alcohol concentration in a mixture of gasoline and alcohol, are connected with a frequency oscillator of the LC type which applies a signal having a frequency which is equal to or greater than 10 MHz. The setting of the oscillation frequency to 10 MHz or more eliminates the amount of change in electrode loss and enables stable and accurate alcohol concentration determination.

Apparatus and method for measuring alcohol concentration of liquid

The invention relates to a structure of a liquefied hydrogen pump, located within a liquefied hydrogen fuel tank of a hydrogen (gas ignited) engine, in which a cylinder holder is linked to a lower end of the connecting rod which is reciprocated upwardly and downwardly by means of an external driving source via a first universal joint and a cylinder is housed within a piston holding member via each arm of the cylinder holder so as to be enabled to move upwardly and downwardly. A stepped engagement recess is formed in a bottom end portion of a pump housing. A bottom lid of the piston holding member is linked to an engagement rod via a second universal joint, the engagement rod being received by the engagement recess so that a radial displacement of the piston holding member and piston member to the pump housing is permitted and an automatic axial alignment of both piston and cylinder to an axial line 01--01 of the pump housing is carried out.

Structure of liquefield hydrogen pump

Method and apparatus for detecting an insufficiency of refrigerant in an

The fuel character judging system has an electrical capacitance type sensor which outputs a first detection signal representative of a first character of a fuel mixture. A resistance type sensor outputs a second detection signal representative of a second character of the fuel mixture. A control unit stores first and second maps for a known fuel mixture having known first, second and third numbers corresponding to components of the known fuel mixture. The first map has a plurality of first characteristic lines which respectively correspond to a plurality of values of the first detection signal from the electrical capacitance type sensor. The second characteristic lines are plotted in accordance with the second signal from the resistance type sensor upon changing the known first number. One of the second characteristic lines in the second map is selected in accordance with the first detection signal from the electrical capacitance type sensor. The unknown first number is determined in accordance with the one second characteristic line selected and with the second detection signal for the unknown fuel mixture, from the resistance type sensor. A first characteristic line in the first map is selected in accordance with the determined first unknown number. The unknown second number is determined in accordance with the selected first characteristic line and with the first detection signal for the unknown fuel mixture, from the electrical capacitance type sensor. The unknown third number is determined according to the first and second determined unknown numbers.

Fuel character judging system

In a super magnetostriction type actuator constructed such that a super magnetostriction rod is extended/contracted by application of a magnetic field from a solenoid coil, and a drive object is moved in response to the extension/contraction, a locating member for locating the super magnetostriction rod thermally deforms in correspondence with a thermal expansion of the super magnetostriction rod so as to permit an extension of the super magnetostriction rod due to the thermal expansion thereof. As a result, variation in spring loading and lift with thermal expansion of the super magnetostriction rod can be avoided. Also, the magnetostriction characteristic of the locating member is opposite that of the super magnetostriction rod allowing for greater relative movement of the super magnetostriction rod upon application of a magnetic field.

Super magnetostriction type actuator

In an assist-air type fuel injection device for an internal combustion engine in which an assist-air for atomizing fuel is supplied toward an injected fuel on the lower stream of a nozzle hole of a fuel injection valve, a pressure detection part for detecting a pressure of the above assist-air is provided at the fuel injection valve, and the pressure of the assist-air detected at the above pressure detection part is supplied as a signal pressure to a pressure regulator for regulating a fuel supply pressure to the fuel injection valve. Without being affected by the assist-air pressure, a fuel flow rate can be stabilized, whereby control accuracy of the fuel injection amount can be maintained favorably.

Assist-air type fuel injection method and device for internal combustion

An air conditioning system including a refrigerant circulation route, a compressor, a condenser, an expansion valve, an evaporator and a pressure sensor for detecting pressure in the circulation route comprises a refrigerant phase detecter provided on the circulation route between the condenser and the evaporator where the refrigerant should be in a liquid phase for detecting whether the refrigerant is in a liquid phase or in a vapor phase and a control for determining whether the compressor is in a locked state in accordance with the signals from the refrigerant phase detecter and the pressure sensor. The air conditioning system can precisely determine and detect both compressor lock up and refrigerant leakage without providing a rotation detecting sensor for the compressor.

Sensor and control system for an automotive air conditioning system

Residual coolant sensor for air conditioning system

An engine has a combustion chamber and a fuel injection valve for directly injecting a fuel into the combustion chamber. An assist air supplying apparatus supplies assist air to atomize the fuel injected by the fuel injection valve. Assist air supply pressure is controlled so that a given pressure difference is secured between the assist air supply pressure and pressure in the combustion chamber. The assist air, therefore, is supplied under proper pressure for an entire period of fuel injection, to adequately micronize the injected fuel and improve combustion efficiency.

Method of and an apparatus for supplying assist air into a combustion

A traction control system for an automotive vehicle housing device for adjusting the driving torque delivered to driven wheels from an automotive internal combustion engine, and sensor for detecting vehicular deceleration and acceleration for generating a vehicular deceleration and acceleration indicative data. The system also performs the functions of monitoring the torque transmitted between a road surface and the driven wheel, generating a transmitted torque magnitude indicative data, and predicting road friction level on the basis of the vehicular deceleration and acceleration indicative data and the transmitted torque magnitude indicative data. Based on the road friction level, the system derives a torque criterion on the basis of the raod friction level. The system performs traction control in response to the transmitted torque magnitude indicative data greater than the torque criterion.

Automotive vehicle control system for predicting road friction level

An air conditioning system including a refrigerant circulation route, a compressor, a condenser, an expansion valve, an evaporator and a pressure sensor for detecting pressure in the circulation route comprises a refrigerant phase detector provided on the circulation route between the condenser and the evaporator where the refrigerant should be in a liquid phase for detecting whether the refrigerant is in a liquid phase or in a vapor phase and a control for determining whether the compressor is in a locked state in accordance with the signals from the refrigerant phase detector and the pressure sensor. The air conditioning system can precisely determine and detect both compressor lock up and refrigerant leakage without providing a rotation detecting sensor for the compressor.

A refrigerant overcharge prevention system is applied to a refrigerant charging apparatus which has a refrigerant supply source and a refrigerant supply pipe connected to a refrigerant circuit of a cooling apparatus. The charging apparatus charges refrigerant into the refrigerant circuit while activating a compressor provided in the refrigerant circuit. The system comprises a refrigerant flow suppressing mechanism provided in the refrigerant supply pipe for preventing an excessive flow of refrigerant being charged, a refrigerant charge determining sensor provided in a high-pressure side path of the refrigerant circuit for determining whether the amount of charged refrigerant reaches a desired level by sensing a change of the state of refrigerant present in the refrigerant circuit, and a compressor deactivating circuit for deactivating the compressor in response to the determination of the refrigerant charge determining sensor. The refrigerant charge rate is appropriately suppressed by the refrigerant flow suppressing mechanism to prevent generation of an excessive amount of bubbles of refrigerant in the refrigerant circuit. Completion of a proper refrigerant charge can be precisely and easily detected by the refrigerant charge determining sensor.

Refrigerant overcharge prevention system

A refrigerator having a refrigerant circulating circuit for circulating a mixture of a refrigerant and a refrigerating machine oil. The refrigerator includes a compressor with a bypass circuit or a variable displacement compressor, a state detecting sensor for sensing the degree of separation of the refrigerant mixture, determining circuit for determining whether the detected degree of separation is in a two phase separation area, and a control unit for controlling the amount of the refrigerant passing through the bypass circuit or the displacement of the variable displacement compressor. When the refrigerant mixture enters into the two phase separation area, the amount of discharge or the displacement of the compressor is decreased. The temperature of refrigerant mixture is lowered accordingly and the phase changes from the two phase separation area. The refrigerating machine oil is maintained in a uniformly mixed state with the refrigerant and circulates with the refrigerant to the compressor. As a result, a lock up or breakage of the compressor is prevented.

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Gunma, Japan

Kazumitsu Kobayashi