Honda Motor Co., Ltd.

Daiki Yamazaki

Hidekazu Hironobu

Ryuichi Hata

Masatoshi Nakajima

Nobuaki Ito

Yasunori Shinmi

Takaya Kawana

Masahiro Takeuchi

Hiroaki Tone

A fuel injection control apparatus including a microprocessor. The microprocessor is configured to perform calculating a target injection time, determining a first crank angle defining a start of fuel injection and a second crank angle defining an end of fuel injection, controlling a fuel injector in an injection start priority mode in which the fuel is injected for the first target injection time from a first time point corresponding to the first crank angle or an injection end priority mode in which the fuel is injected for the second target injection time from a second time point corresponding to a target crank angle, and the controlling including controlling the fuel injector so as to inject the fuel in the injection start priority mode or the injection end priority mode in accordance with an injection mode.

Fuel injection control apparatus

An internal combustion engine control apparatus including a microprocessor. The microprocessor is configured to perform determining whether a start of the internal combustion engine is complete, determining whether a warm-up of an exhaust catalyst device is needed, acquiring an information on a temperature inside a cylinder, switching an injection mode, and controlling the fuel injector to inject the fuel in accordance with the injection mode, the switching including switching the injection mode to the first injection mode when the start of the internal combustion engine is complete and the warm-up of the exhaust catalyst device is needed, and switching the injection mode to the second injection mode or the third injection mode in accordance with the information on the temperature when the start of the internal combustion engine is complete and the warm-up of the exhaust catalyst device is not needed.

Control apparatus for internal combustion engine

An internal combustion engine control apparatus is configured to control an internal combustion engine including a piston reciprocating in a cylinder and a fuel injector arranged to inject a fuel into a combustion chamber facing the piston in the cylinder. The internal combustion engine control apparatus includes an electronic control unit having a microprocessor and a memory. The microprocessor is configured to perform controlling the fuel injector so as to inject the fuel in an injectable area from a first crank angle at which an intake stroke is started to a second crank angle at which a compression stroke is ended, and setting an injection frequency of the fuel injected by the fuel injector in the injectable area. The microprocessor is configured to perform the setting including setting the injection frequency between once and four times.

A temperature acquisition apparatus for an internal combustion engine is configured to acquire a temperature of a combustion chamber of the internal combustion engine. The apparatus includes: an electronic control unit having a processor and a memory coupled to the processor. The processor is configured to perform: acquiring an intake air amount of the internal combustion engine; calculating a cumulative intake air amount based on the intake air amount; and acquiring a temperature of the internal combustion engine based on the cumulative intake air amount.

Temperature acquisition apparatus for internal combustion engine

An internal combustion engine control apparatus including a microprocessor. The microprocessor is configured to perform controlling a fuel injector so as to inject a fuel of a target injection amount by dividing into a plurality of times at a predetermined time interval in an area from a first crank angle at which an intake stroke is started to a second crank angle at which a compression stroke is ended, and setting the predetermined time interval. The microprocessor is configured to perform the setting including setting the predetermined time interval so that a spray length from a tip of the fuel injector to a tip of a spray of the fuel injected from the fuel injector becomes shorter than the spray length when the fuel of the target injection amount is injected at once in the area by a predetermined rate.

A fuel injection control apparatus including a microprocessor. The microprocessor is configured to perform calculating injection target values per a combustion cycle, controlling a fuel injector so as to inject fuel in accordance with the injection target values, instructing a switching between a first mode injecting the fuel and a second mode stopping the fuel injection, determining whether it is possible to inject the fuel in accordance with the injection target values when the switching from the second mode to the first mode is instructed, and modifying the injection target values by reducing a target injection frequency when it is determined to be impossible to inject the fuel in accordance with the injection target values, and the controlling including controlling the fuel injector, when the injection target values are modified, so as to inject the fuel in accordance with modified injection target values.

A fuel injection control apparatus including a microprocessor. The microprocessor is configured to perform calculating a target injection time, determining a first crank angle defining a start of fuel injection and a second crank angle defining an end of fuel injection, controlling a fuel injector in a first injection mode in which the fuel is injected for the first target injection time from a first time point corresponding to the first crank angle or a second injection mode in which the fuel is injected for the second target injection time from a second time point corresponding to a target crank angle, and the controlling including controlling the fuel injector so as to inject the fuel in the first injection mode first and in the second injection mode last when the fuel is injected multiple times between an intake stroke and a compression stroke.

An internal combustion engine control apparatus including an electronic control unit having a microprocessor and a memory. The microprocessor is configured to perform switching an injection mode between a first injection mode in which the fuel is injected in a range including an intake stroke and a compression stroke of an internal combustion engine and a second injection mode in which the fuel is injected in the range so that an injection frequency in the compression stroke in the second injection mode is greater than an injection frequency in the compression stroke in the first injection mode; and determining whether the injection mode needs to be switched based on an ignition timing of the ignitor.

A fuel injection control apparatus including a microprocessor. The microprocessor is configured to perform calculating a target injection time, determining a first crank angle defining a start of fuel injection and a second crank angle defining an end of fuel injection, controlling a fuel injector in a first injection mode in which the fuel is injected for the first target injection time from a first time point corresponding to the first crank angle or a second injection mode in which the fuel is injected for the second target injection time from a second time point corresponding to a target crank angle, and the controlling including controlling the fuel injector so as to inject the fuel in an intake stroke in the first injection mode, while inject the fuel in a compression stroke in the second injection mode.

Growing community of inventors

Wako, Japan

Daiki Yamazaki