Mazda Motor Corporation

Yasuhiro Harada

Kazutoshi Nobumoto

Toru Onaka

Eizi Nishimura

Kouichirou Waki

Hiroyuki Arakawa

Takeshi Imai

Shizuo Sumida

Toshihiro Matsuoka

Mitsuru Nagaoka

Shoji Imai

Shinichi Wakutani

Hiroshi Ebino

Satoshi Komori

Akira Kamisakamoto

Masashi Ohmori

Masaaki Nakashima

Shigeki Hiramatsu

Syuzi Mitui

A controller causes a calculation device to perform calculation that determines an operation of a moving object and generates digital signals that define the operations of actuators. The generated digital signals are output to a digital signal transmission path by a signal bus control IC. ICs attached to the actuators obtain digital signals that define the operations of the actuators from the digital signal transmission path and generate control signals for the actuators based on the operations defined by the digital signals.

Control system for moving object

A controller includes a control section configured to actually control a hardware unit, an identification model including a hard model obtained by modeling a dynamic characteristic of the hardware unit and a soft model configured to execute same processing as processing performed on the hard model by the control section, and an adjustment section configured to update a dynamic characteristic of a model of the hardware unit in the hard model such that an output value of the hard model obtained by processing of the soft model matches an actual output value of the hardware unit.

Control device for mobile body

This invention proposes a simulation apparatus which can simulate by easily coping with changes in component and model. A simulation apparatus simulates, using a system model, the dynamic performance of a target apparatus to be simulated, which includes a driving source and is constructed by a plurality of units for transmitting the driving force output from the driving source, and expresses the target apparatus by functional and data models. The functional model expresses each of units that construct the target apparatus by exchange of energy by the dynamic performance of that unit, and a parameter which determines that dynamic performance. The parameter for each unit is computed using static characteristic data read out from a memory, thus expressing each unit as a data model.

Simulation system using model

A control system for controlling a dynamically operative apparatus having a dynamic characteristic by which a relationship between input to and output from said dynamically operative apparatus is defined includes an apparatus control subsystem and a model control subsystem for controlling an apparatus model which has an imitate dynamic characteristic modeled on the input and output relationship, performing adaptation of the imitate dynamic characteristic by optimizing control parameters of the model so that the model provides output in conformity with the input and output relationship, simulating operation of the apparatus by controlling the model after the adaptation, and regulating control parameters of the apparatus control subsystem according to a result of the simulation.

Control system for dynamically operative apparatuses

In an automotive power plant including a combustion engine, intake and exhaust passages communicated with a combustion chamber for an introduction of an air-fuel mixture into and a discharge of exhaust gases from the combustion chamber, respectively, a fuel injector for injecting a controlled amount of fuel into the combustion chamber together with air sucked through the intake passage, and a throttle valve of which opening is adjustable for controlling the flow of the air through the intake passage, a fuel control system for determining the amount of fuel to be injected into the combustion chamber in dependence on the amount of air being sucked. The fuel control system includes a throttle sensor for detecting the opening of the throttle valve; and a control unit operable to determine a first fuel decrement in dependence on the amount of fuel injected at the start of a decrease in throttle opening during a deceleration of the engine when the throttle sensor detects the decrease in throttle opening at a speed higher than a predetermined value and regardless of a speed of movement of the throttle valve; to interrupt the determination of the first fuel decrement when the rate of change of the throttle valve attains a zero value; and thereafter to determine a second fuel decrement in dependence on a change in load on the engine.

Fuel control system for automotive power plant

Fuel injection increasing timing occurs differently from the timing of changing an intake air flow and an exhaust gas flow, wherein the fuel injection quantity is controlled by a detected intake pressure and an engine which increases the fuel injection quantity at accelerating comprises a system for changing an exhaust gas glow of an exhaust system by a sequential turbo control and changing an intake air flow of an intake system by a dynamic effect of an intake air. The fuel supply is delayed by the fuel injection quantity increase at accelerating. This delay and pressure difference of intake air and exhaust gas by changing intake air flow and exhaust gas flow work together to prevent the air fuel ratio from fluctuating greatly, and a good engine combustion is maintained.

Engine control system

In a constant-speed cruising control system for a vehicle in which the throttle opening is feedback-controlled according to the difference between the actual vehicle speed and a desired vehicle speed so that the actual vehicle speed matches the desired vehicle speed, the vehicle speed is constantly detected when it increases in response to a driver's command, and the throttle valve is controlled so that the throttle opening converges on a target throttle opening which is predetermined according to the vehicle speed. The target throttle opening is corrected according to the running condition of the vehicle so that the vehicle speed is increased at a constant acceleration irrespective of the running condition of the vehicle.

Constant-speed cruising control system

An engine output control system comprising an acceleration detector for detecting an amount of a stroke of accelerator and producing an acceleration signal in accordance with the amount of the stroke, throttle valve, electrical control mechanism for determining an electrical control signal to actuate the throttle valve in accordance with the electrical control signal, mechanical control mechanism mechanically linked with the throttle valve for actuating the same in accordance with the amount of the stroke, abnormality detector for detecting an abnormality of the electrical control mechanism, switch mechanism for producing a signal to switch a control for the throttle valve between the mechanical and the electrical control mechanism, and switching control mechanism for performing an actual switching action from the mechanical control mechanism to the electrical control mechanism based on the signal from the switching mechanism under a specific engine operating condition.

Engine output control system

The vehicle slip control apparatus is designed so as to enable the slip control to be done by causing the output torque of the engine to be reduced and operating the brake when an amount of a slip or spinning of the driven wheels is large. A control ratio of the slip control by the brake to the slip control by the engine is altered to an optimum value in accordance with requirements for the driving of the vehicle.

Vehicle slip control apparatus

The slip control is conducted so as to cause an amount of the slip of the driven wheel to become a target value by controlling the torque to be transmitted to the driven wheel. The target value is altered during the slip control on the basis of a requirement for road holding capabilities of the driven wheel against a road surface.

The vehicle slip control apparatus is designed so as to enable the slip control to be done by causing the output torque of the engine to be reduced and operating the brake when an amount of a slip or spinning of the driving wheels is large, on the one hand, and only by causing the output torque of the engine to be reduced without using the brake when an amount of the slip or spinning of the driving wheels is small.

Growing community of inventors

Hiroshima, Japan

Yasuhiro Harada