Honda Giken Kogyo Kabushiki Kaisha

Tetsuo Nakajima

Tomio Aoi

Hiroshi Irino

Toshio Nomura

Hirotaka Kumata

Yasuhiro Imai

A fuel injection control device for an internal combustion engine, which enables injection of fuel into separate cylinders to be controlled by only one timer counter, without reference to the number of cylinders, thereby simplifies the configuration of an electronic circuit for the control of the internal combustion engine, and promotes reduction of cost and improvement of reliability. A timer counter constantly takes count of clock pulses, a register is set to a first preset value which is a sum of a count value existing in said timer counter and a value corresponding to an expected delay time upon occurrence of a top dead center signal, and, subsequent to occurrence of an injection start signal, the register is set to a second preset value produced by addition of said actual fuel injection time signal to said first preset value, a comparator generates an injection start signal when a count value in the timer counter is equal to the first preset value in said register and generates an injection stop signal when said count value is equal to said second preset value, and one of the injectors for receiving said injection start and injection stop signals is selected and designated based on an injection discriminating signal and a top dead center signal.

Fuel injection control device for internal combustion engine

This invention provides an apparatus for the control of acceleration and deceleration of an automobile, which enlarges the ratio of increase in the real speed of the automobile while the automobile is accelerated from its auto-cruise condition and precludes overshoot and hunting of the real speed of the automobile after the acceleration or deceleration is completed and the resumption of constant-speed travel is started. In the course of acceleration, the throttle opening angle is first increased abruptly by a predetermined amount and then increased as the function of time and, upon disappearance of an acceleration signal, the throttle opening angle is decreased by an amount based on the real speed of the automobile as it exists at that moment. In the course of deceleration, the throttle opening angle is decreased abruptly to a very small value which may be almost zero and, upon disappearance of a deceleration signal, the throttle opening angle is increased to a level based on the real speed of the automobile as it exists at that moment.

Apparatus for control of acceleration and deceleration during auto-cruise

This invention provides an apparatus for the control of the transition to auto-cruise, which is capable of precluding detrimental phenomena such as dipping and hunting of the automobile speed while the control of the automobile speed is in transition from the manual status to the automatic status. In accordance to this invention, when the auto-cruise status is set, the apparatus unconditionally effects an initial setting of the throttle position to a provisional target throttle position which is dependent on the automobile speed as it exists at that moment, namely the target speed of the automobile, and thereafter the apparatus detects the deviation of the real speed of the automobile from the target automobile speed and, based on this deviation, effects feedback control of the throttle position.

Apparatus for control of transition to auto-cruise

A mixture control apparatus for a carburetor which precludes otherwise possible occurrence of fluctuation in the opening angle of the throttle valve even when the engine operation happens to fall near the boundary between the cold state and the hot state. The electric motor for driving the throttle valve is prevented from moving to the side of reverse rotation thereof from the side of normal rotation thereof past a home position after said engine has been changed to its hot state and unless a stop of said engine is detected.

Mixture control apparatus for carburetor

Temperature measuring device for an internal-combustion engine comprising a main engine temperature sensor to measure the temperature of the cooling water, for example, and a secondary or auxiliary temperature sensor disposed near a heat generating element in an electronic engine control unit, as a standby for the main temperature sensor. When an output of the main temperature sensor happens to fall outside the predetermined normal range, the main temperature sensor will be immediately switched to the auxiliary temperature sensor to allow the various phases of engine control to proceed without interruption.

Temperature measuring device for internal-combustion engine

A mixture control apparatus for a carburetor which precludes otherwise possible occurrence of fluctuation in the opening angle of the throttle valve when the engine operation happens to fall near the boundary between the cold state and the hot state, a stepping motor for driving the throttle valve is prevented from hunting near the boundary between the cold state and the hot state of the engine by conferring hysterersis characteristics upon the set value for discriminating between the cold state and the hot state.

Growing community of inventors

Saitama, Japan

Tetsuo Nakajima