Honda Giken Kogyo Kabushiki Kaisha

Toshiaki Hirota

Shusuke Akazaki

Yusuke Hasegawa

Hidetaka Maki

Isao Komoriya

Yoichi Nishimura

Toru Kitamura

Jun Takahashi

Akira Kato

Hiroshi Kitagawa

Sachito Fujimoto

Hisashi Igarashi

Akira Katoh

Masami Watanabe

Hiroshi Hashimoto

Yoshiharu Saito

Hiroyuki Abe

Yuji Nagatani

Eisuke Kimura

Masataka Yamamoto

Hiroki Matsui

Tetsuya Kaneko

Shunichi Tsuzuki

Seiji Hatcho

Yasuo Takagi

Tetsuya Ohno

Yoshiki Tatsutomi

Sakae Suzuki

Jyunichi Kobayashi

Shintaro Oka

Kenichirou Ishii

The present invention provides a vehicle control system, which easily carries out modifications such as updating and improvement of the system, improving the transmission efficiency of the data and responsiveness of the system, and allowing the redundancy to be effectively used even during normal operation of the network. In the vehicle control system, an electric control device is formed comprising a cooperative control ECU which acts as a server apparatus and a plurality of subsystems which are connected to this cooperative control ECU and act as client apparatuses. The plurality of subsystems comprise, for example, a motor control ECU, a reactive gas supply control ECU, an electrical power distribution control ECU, and a cell voltage detection control ECU. Each of the ECUs which forms each of the subsystems carries out I/O processing for the control signals that are sent to and received from the cooperative control ECU and shut down processing and protective processing during abnormal operation such as a network stoppage. The cooperative ECU carries out control operations for controlling each of the ECUs and the controlled objects based on control signals obtained from the I/O processing of each of the ECUs.

Vehicle control system

A fuel metering control system for an internal combustion engine including a feedback loop having an adaptive controller and an adaptation mechanism that estimates controller parameters .theta.. The adaptive controller corrects the quantity of fuel injection to bring a controlled variable obtained at least based on an output of said air/fuel ratio sensor, to a desired value. The adaptation mechanism is input with the controlled variable once per prescribed crank angle such as a TDC of a certain cylinder and estimates the controller parameters. Using the controller parameters, it is discriminated whether system operates stably.

Fuel metering control system for internal combustion engine

A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions such as engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the detected parameters. A plurality of controllers are provided all using outputs of the air/fuel ratio sensor. The controllers are configured to receive the sensor outputs through filters having different cutout frequency so as to avoid control interference therebetween.

A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a first feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired value, and second feedback loop is provided for calculating feedback correction coefficients to correct the quantity of fuel injection. The desired air/fuel ratio is corrected by a second air/fuel ratio installed downstream of a catalytic converter.

A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired value. The desired air/fuel ratio is corrected by a second air/fuel ratio sensor installed downstream of a catalytic converter.

A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a first feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired air/fuel ratio, and second and third feedback loops are provided for calculating feedback correction coefficients to correct the quantity of fuel injection. The output quantity of fuel injection is determined on the basis of the basic quantity of fuel injection and the feedback correction coefficients.

A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting device for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data predetermined based on an effective opening area of a throttle valve, according to the engine speed and engine load. An adaptive controller is provided to calculate a feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired value. The output quantity of fuel injection is further corrected by fuel adhered on an intake manifold wall.

A control system for an automatic transmission of an internal combustion engine installed on an automotive vehicle measures a duration over which the automatic transmission continues to be in a speed position. Downshift of the speed position of the transmission to a lower speed position is inhibited if the measured duration does not exceed a predetermined time period, when it is determined that the automotive vehicle is in a predetermined decelerating condition.

Control system for automatic transmissions

An air-fuel ratio control system for an internal combustion engine has a catalytic converter arranged in an exhaust passage. A maximum oxygen storage amount indicative of the maximum amount of oxygen that can be stored in the catalytic converter is calculated. The air-fuel ratio of a mixture supplied to the engine is forcibly oscillated at a predetermined frequency and a predetermined amplitude. At least one of the predetermined frequency and the predetermined amplitude is changed at a predetermined rate of change. A predetermined rate of change of the at least one of the predetermined frequency and the predetermined amplitude is set in dependence on the maximum oxygen storage amount to thereby secure the maximum purification rate of the catalytic converter.

Air-fuel ratio control system for internal combustion engines and

A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired air/fuel ratio value is provided for calculating feedback correction coefficients to correct the quantity of fuel injection. The output quantity of fuel injection is determined on the basis of the basic quantity of fuel injection and the feedback correction coefficients, and in addition, fuel adhered on an intake manifold wall.

A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. A controller is provided to calculate a feedback correction coefficient to correct the quantity of basic fuel injection such that variance between individual cylinder air/fuel ratios is decreased. The quantity of fuel injection is further corrected by a fuel adhered to an intake manifold wall.

In a control system for controlling motor vehicles in such a manner that the drive force of the vehicle is determined by the accelerator pedal stroke and the vehicle speed, the fuel consumption is minimized by appropriately selecting the gear ratio of the power transmission system under each current operating condition. In particular, the present invention accounts for the slip ratio of the lock-up clutch as well as the transmission efficiency of the torque converter by noting the fact that the lock-up clutch operates under semi-tight conditions as well as under tight and loose conditions.

Control system for motor vehicles equipped with a torque converter and a

A fuel supply control system for an internal combustion engine having a catalytic converter arranged in the exhaust system, includes an ECU which estimates a storage amount of oxygen stored in the catalytic converter, calculates a physical amount having correlation with a purification rate of the catalytic converter, based on the estimated storage amount of oxygen, and controls the air-fuel ratio of an air-fuel mixture to be supplied to the engine, based on the calculated physical amount.

Fuel supply control system for internal combustion engines

A target drive shaft torque is calculated from an accelerator pedal opening degree and a vehicle speed. During acceleration of the vehicle wherein target device shaft torque is not negative, a target engine torque for generating target drive shaft torque is calculated, and a target throttle opening degree for providing target engine torque is determined. On the other hand, during deceleration of the vehicle wherein target drive shaft torque is negative, a target throttle opening degree is determined from accelerator pedal opening degree at which the drive shaft torque is zero and the throttle opening degree at which the engine torque is zero. This target throttle opening degree is in a proportional relation to the accelerator pedal opening degree and thus when accelerator pedal opening degree target throttle opening degree.

Engine output control system for vehicle

A vehicle control system having program generator and convertor. The system includes a simulation device for simulating actual states such as the actual operating states of an automobile based on various input conditions, a program generation device for generating a control program for an automobile transmission or the like on the basis of the simulated states, a detection device for detecting expressions requiring quantization data included in the control program, a conversion device for converting the detected expressions using a method of notation such as reverse Polish notation, an arithmetic device for multiplying the converted variables by prescribed scaling factors obtained from the quantization factor, and for compressing the expressions multiplied by the arithmetic device. A program generated on a mainframe computer using floating point arithmetic can be translated entirely by machine into a program that can be executed by a microcomputer without using floating point arithmetic.

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Wako, Japan

Toshiaki Hirota