Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Atsushi Kato

Yoshikazu Oshima

Ken Ogawa

Kei Machida

Katsunori Nakamura

Yasunori Ehara

Shigeru Aoki

Kazuhiro Ueda

Shigeo Hidai

Toshiyuki Nishida

Akira Murakami

Ryuichi Noseyama

Kenichiro Ishibashi

Kotaro Fujimura

Atsushi Izumiura

Masamitsu Tsuchiya

Gakuyo Fujimoto

Seiichi Hosogai

Mitsuru Ikeo

Eisaku Gosho

Nobuo Arai

Shigenobu Saigusa

Yoshikazu Ohshima

A control device is configured to perform: performing a first process when an index value indicating a degree of closeness to a risky object which is present in front of a mobile object is less than a first threshold value; performing a second process when the index value is equal to or greater than the first threshold value and less than a second threshold value greater than the first threshold value; and performing a third process and the second process when the index value is equal to or greater than the second threshold value. The third process includes a fourth process of proposing a driving operation for avoiding the risky object to a driver. The fourth process is not performed when the driver has performed an action for reducing or releasing an operation of an operator instructing an accelerating operation for accelerating the mobile object.

Control device, control method, and storage medium

Provided is a mobile object control device configured to: recognize a surrounding situation of a mobile object; set, based on the recognized surrounding situation, a risk area in which positions of the surrounding situation are associated with risk values that are indicator values indicating degrees to which the mobile object is to avoid traveling; generate a target trajectory indicating a route along which the mobile object is to travel in the future; cause the mobile object to travel along the generated target trajectory; and set at least one observation point in each of three or more provisional trajectories branching at a specific location ahead of the mobile object, and generate the target trajectory based on the risk area and the at least one observation point.

Mobile object control device, mobile object control method, and program

A system for detecting failure of a fuel pressure sensor in an internal combustion engine, including an injector (32) provided at an intake system of the engine downstream of a throttle valve (38), a fuel supply passage (16) connected to a fuel supply source (fuel tank 12) for supplying fuel to the injector (32), pressure regulator (28) provided in the fuel supply passage (16) and operating to maintain a difference between the fuel pressure (PF2A) and the manifold absolute pressure at a constant value, a fuel pressure sensor (PF2 sensor 54) for detecting the fuel pressure (PF2A) in the fuel supply passage (16) downstream of the pressure regulator, and a manifold absolute pressure sensor (62) for detecting the manifold absolute pressure (PBA) downstream of the throttle valve (38). In the system, an index indicative of a ratio (.DELTA.PF2A) of the fuel pressure (PF2A) fluctuation relative to the manifold absolute pressure (PBA) fluctuation is compared to reference values (#PF2L, #PF2H) which define a range. Sensor failure is discriminated when the index (.DELTA.PF2A) is found to have remained outside of the range for a predetermined maximum time (tmP2STK). The system enables rapid and accurate detection of fuel pressure sensor abnormality (failure).

System for detecting failure of fuel pressure sensor

Supply of fuel is stopped when fuel pressure sensed by a pressure sensor provided upstream of a regulator is at a predetermined value or less to avoid abnormal combustion caused by improper adjustment of air/fuel ratio. Even slight variation of the fuel pressure is sensed by monitoring the fuel pressure in an interval after closing a fuel shut-off valve once opened to re-opening of it. In addition, an abnormal state in the fuel system is detected by comparing an accumulated value of amount of injected fuel and an estimated value of fuel consumption in the tank. Furthermore, the peak current value of the fuel injection valve is controlled so that, when the engine at a low temperature is started, lift load of the injection valve is larger than sticking force of the injection valve, thereby preventing such situation where the injection valve is frozen so that it cannot supply fuel to the engine. In this case, the engine can be smoothly started by simultaneously controlling the valve open time. Furthermore, the temperature of the regulator is properly maintained so that optimum function can be exhibited by controlling the flow rate of cooling water flowing through a water passage provided in the regulator for regulating the fuel gas pressure.

Gas fuel supply system for vehicle

A fuel supply mechanism for a gas combustion engine has a tank filled with a gas fuel, a fuel injector having a fuel injection valve mounted on the gas combustion engine, a pipe for supplying the gas fuel from the tank to the fuel injector, a gas fuel cutoff valve in the pipe for cutting off the gas fuel flowing through the pipe, a gas fuel state detector for detecting a state of the gas fuel, and a control unit responsive to a detected signal from the gas fuel state detector for controlling the gas fuel cutoff valve and the fuel injection valve.

Gas fuel supply mechanism for gas combustion engine

A control system according to one aspect calculates a ratio of an actual amount of fuel supplied to the combustion chamber to the desired amount of fuel to be supplied to the combustion chamber, by taking into account at least an amount of evaporative fuel supplied to the combustion chamber, and sets the rate of change of the air-fuel ratio correction coefficient based on this ratio of the actual amount to the desired amount. A control system according to another aspect of the invention calculates an injected fuel ratio of an amount of fuel injected to an amount of total fuel to be supplied to the combustion chamber, and controls the ignition timing based on the injected fuel ratio and depending on operating conditions of the engine.

Control system for internal combustion engines

A control system for an internal combustion engine according to one aspect of the invention calculates a total amount of evaporative fuel purged from a canister based on dynamic characteristics and concentration of purged gas. The system calculates an amount of evaporative fuel supplied to the combustion chamber of the engine based on the total amount of evaporative fuel and depending on dynamic characteristics of the purged gas. Then, the system determines a required amount of fuel to be injected by a fuel injection valve based on the amount of evaporative fuel supplied to the combustion chamber. A control system according to another aspect of the invention calculates an amount of fuel to be injected by the injection valve and the ratio of the amount of fuel to be injected to the amount of fuel to be purged from the canister based on operating conditions of the engine, and based on this ratio, controls the purge control valve and at the same time decreases the amount of fuel to be injected, while setting a limit to this ratio for maintaining the linear relationship of the valve opening period of the fuel injection valve and the fuel injection amount.

A catalyst deterioration-detecting device for an internal combustion engine has at least one catalyst arranged in an exhaust passage of the engine,for purifying exhaust gases emitted from the engine, first and second exhaust component concentration sensors arranged in the exhaust passage upstream and downstream of the catalyst, respectively. The catalyst deterioration-detecting device calculates an average value of an output value from the second exhaust component concentration sensor, calculates an output fluctuation width with respect to the average value, based on the output value from the second exhaust component concentration sensor, and determines whether the catalyst is deteriorated, based on the calculated average value and the calculated output fluctuation width. The detection of the catalyst deterioration is carried out when the engine is in a predetermined operating condition defined by engine temperature, engine speed and engine load.

Catalyst deterioration-detecting device for internal combustion engines

Growing community of inventors

Wako, Japan

Atsushi Kato