Nissan Motor Company Limited

Nissan North America, Inc.

Tetsuya Iijima

Seiichi Takahashi

Roy W Goudy

Seiji Takeda

Satoshi Tange

Kenichi Egawa

Tetsuya Asada

Yukio Shimada

Mikio Tanino

Hiroshi Yano

Toshio Shibuya

An on-board vehicle warning system includes a location detecting section, a regulation retrieving section, an incoming message receiving section and a potential violation alerting section. The location detecting section detects respective geographic locations of a vehicle and a forthcoming intersection. The regulation retrieving section retrieves, based on the intersection location, a jurisdiction including local intersection regulation information pertaining to a vehicle position with respect to an intersection boundary at the time of a particular phase transition of a traffic light. The incoming message receiving section receives intersection status information of the intersection containing a geographic location of the boundary and phase information including a current phase and a time to the phase transition of a traffic light of the intersection. The potential violation alerting section estimates a future position of the vehicle with respect to the boundary at the occurrence of the phase transition to determine a potential violation.

On-board vehicle warning system and vehicle driver warning method

An on-board vehicle warning system includes a vehicle location detecting section, a traffic regulation retrieving section, an incoming message receiving section, a vehicle information detecting section, a potential violation alerting section. The traffic regulation retrieving section is configured to retrieve information relating to a local traffic regulation corresponding to the location of the host vehicle from traffic regulation data including traffic regulations relating to a plurality of jurisdictions. The potential violation alerting section is configured to determine a potential traffic violation based on the intersection information and the vehicle travel information, and to selectively produce a driver notification to a driver of the host vehicle based upon a determination of the potential traffic violation according to the local traffic regulation corresponding to the location of the host vehicle.

In a vehicular velocity controlling apparatus for an automotive vehicle, a vehicular velocity detector is provided to detect a vehicular velocity of the vehicle, a vehicular velocity controlling section is provided that controls a vehicular driving force of the vehicle to make a detected value of the vehicular velocity substantially equal to a set vehicular velocity previously set, a plurality of switches are provided which includes a first switch (SET/COAST switch) and a second switch (RESUME/ACCELERATE switch), each switch being enabled to be interlocked with a predetermined operation of at least one switching member at a position such as to match with a general vehicular occupant's sense of vehicular manipulation, and a set vehicular velocity modifying section is provided that modifies the set vehicular velocity in such a manner that the detected value of the vehicular velocity is set to the set vehicular velocity when at least one of the following conditions is established, when a time duration of the predetermined operation of the first switch is equal to or longer than a first predetermined time duration and the detected value of the vehicular velocity is lower than the set vehicular velocity and when the time duration of the predetermined operation of the second switch is equal to or longer than a second predetermined time duration and the detected value of the vehicular velocity is higher than the set vehicular velocity.

Vehicular velocity controlling apparatus for automotive vehicle

An air-conditioning method and system controls the temperature of air outputted from an air conditioner outlet duct into the passenger compartment of a vehicle at a constant level, with a small time constant of recovery, by adjusting the air mix door opening percentage. The air-conditioning method comprises the steps of calculating a target outlet duct air temperature on the basis of a preset passenger compartment air temperature, a detected outside-air temperature, and a detected passenger compartment air temperature in accordance with a heat equilibrium equation and calculating an air mix door opening percentage on the basis of the calculated target outlet duct air temperature in accordance with a linear interpolation between two endpoints of a selected one of three characteristics representative of relationships between outlet duct air temperature and air mix door opening percentage respectively stored for outside-air introduction mode, inside-air recirculation mode, and cooler compressor operation mode.

Air-conditioning method and system for an automotive vehicle

A variable thermostat-type air conditioning system for an automotive vehicle passenger compartment has a dehumidification switch. When a driver depresses the dehumidification switch the compressor begins to operate as if the temperature-adjusting lever were set to the extreme COOL end. Therefore, it is possible to dehumidify or cool the passenger compartment without adjusting the temperature-adjusting lever which is already set to an appropriate lever position. The air-conditioning system according to the present invention comprises a temperature-sensitive element, a variable resistor linked to the temperature-adjusting lever, the dehumidification switch to short the variable resistor, and a thermocontrol amplifier, in addition to a standard compressor, evaporator, etc.

Air-conditioning system for an automotive vehicle

An automobile air conditioning system is provided with a control system for controlling the flow rate of hot or cool air discharged into the passenger compartment. The air flow rate is controlled in relation to the sensed value of the ambient air temperature and the temperature of a heat source of the air conditioning system. If the sensed temperatures are lower than predetermined reference levels, the air flow rate is gradually increased at a moderate increasing rate. The air flow rate is more rapidly increased when the sensed heat source temperature is higher than the reference level.

Control for automobile air conditioning system

An automobile air conditioning system is provided with a control system for controlling the flow rate of hot or cool air discharged into the passenger compartment. In this control system, the air flow rate is increased with an increase of the absolute value of the temperature difference between a predetermined reference temperature and a room temperature of the compartment detected by a sensor, and is decreased with a decrease of the absolute value.

A method of and a device for controlling an air conditioning system in which an air-flow proportioning door is positioned between a heater unit and a refrigerant evaporator unit and is movable into and out of an angular position shutting off the flow of air from the evaporator unit to the heater unit and in which a refrigerant compressor unit associated with the evaporator unit is operated to alternately stop and start depending upon the temperature of the air delivered from the evaporator unit, wherein the angular position of the air-flow proportioning door and the compressor stop and start temperatures are controlled depending upon a target blowoff temperature calculated from decided and detected temperatures of the space to be air conditioned and a detected ambient temperature so as to reduce the duty cycle of the compressor unit.

Method and device for controlling an air conditioning system

An air-conditioning method and system for an automotive vehicle according to the present invention automatically maintains the temperature of air within the passenger compartment at a value preset by a passenger compartment air temperature presetting device and adjusted to a comfortable temperature which varies according to the outside-air temperature in accordance with a predetermined relationship defined by three linear functions having two points of intersection. The method comprises the steps of calculating a basic outlet duct air temperature, calculating an outlet duct air temperature correction, adding the two calculated values, and calculating an air mix door opening percentage, in addition to calculating a comfortable passenger compartment air temperature.

An air circulation system for effectively and comfortably circulating the air in the vehicle compartment, which system comprises an air passage having intake below the rear seat and outlet in the rear pacel shelf. Thereby, the air in the vehicle compartment is drawn to the intake of the air passage and discharged from the rear portion of the rear seat. This is cooperatively effect to air flow in the vehicle compartment for circulating the air therein effectively and comfortably.

Air circulation system in a vehicle compartment of an automotive vehicle

A temperature control device for an automobile air conditioner including an electronic control circuit for regulating air temperature in the automobile, by automatically actuating a temperature regulating element of the air conditioner in response to variations of resistance values of resistive elements representing air temperature in the automobile and operative conditions of the temperature regulating element and a temperature setting element. An adjusting means is provided for modifying the virtual characteristics of the aforesaid resistive elements depending on ON or OFF state of a compressor of the air conditioner, whereby the air temperature in the automobile is controlled at a certain value irrespective of ON or OFF state of the compressor.

Temperature control device for automobile air conditioner

A downshift control apparatus for biasing a shift valve of a hydraulic control system of an automatic power transmission of an automotive vehicle toward a downshift position for raising the transmission gear shift points during kickdown or sudden deceleration condition of the vehicle, featuring a downshift valve which includes a valve spool movable between a first position passing a control fluid pressure to the shift valve and a second position discharging the fluid pressure from the shift valve, wherein the valve spool is urged toward the first position by the force of a spring and a fluid pressure developed in the valve in response to a kickdown condition or a sudden deceleration condition of the vehicle and toward the second position by a fluid pressure varying with the power output of the engine and a force resulting from a fluid pressure which acts on a differential pressure-acting area of the valve spool when the valve spool is held in or moving toward the second position thereof.

Downshift control apparatus for automatic power transmission

When the accelerator pedal is fully depressed, shifting points at which the automatic power transmission shifts to another gear ratio are suddenly moved toward the higher vehicle speed to readily achieve the downshift of the transmission even during a relatively high vehicle speed. The downshifts are continued until the magnitude of the throttle pressure which is substantially proportional to the output of the engine is decreased to a predetermined level even when the accelerator pedal is permitted to return to its partially depressed position.

Control system for an automatic power transmission

A snap-action switch operated by movements of the accelerator pedal is interposed between a D.C. source and a downshift circuit actuator of the automatic power transmission in a manner that once the switch closes by nearly full depression of the accelerator pedal, the switch remains closed unitl the accelerator pedal is permitted to return to or beyond a partially depressed position corresponding to about 1/2 open position of the throttle valve. The saving of fuel is accomplished by the 'lost motion' existant between the boss portion of the rod and the respective projection surfaces engaged by the boss portion in the acceleration and deceleration phases of operation.

Control system for an automatic transmission including switch with lost

Delay means is provided for, when a parameter representative of a function of the output torque of an engine is abruptly varied and fails to represent the function, delaying the transmission of variation in the parameter to regulator means, for regulating a control pressure for a hydraulically operated clutch in accordance with the parameter, to cause the regulator means to regulate the control pressure to vary at a rate lower than that of variation of the parameter.

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Tokyo, Japan

Tetsuya Iijima