Apparatus for and method of controlling internal combustion engine

Apparatus for controlling an internal combustion engine comprising a system comprising (i) fuel injection means having a port for injecting fuel into a combustion chamber of the internal combustion engine, (ii) air amount control means for controlling an amount of air within a cylinder, (iii) a transmission, and (iv) drive torque control means for controlling a drive torque in accordance with at least one of the fuel injection amount and the air amount and a gear shift position of said transmission, in which said drive torque control means changes the air/fuel ratio at the time of shifting the gear position of said transmission, and also selects a gear ratio of said transmission at this time so that the torque will not be varied.

Apparatus for controlling an internal combustion engine comprising a system comprising (i) fuel injection means having a port for injecting fuel into a combustion chamber of the internal combustion engine, (ii) air amount control means for controlling an amount of air within a cylinder, (iii) a transmission, and (iv) drive torque control means for controlling a drive torque in accordance with at least one of the fuel injection amount and the air amount and a gear shift position of said transmission, in which when selecting the minimum gear ratio, said drive torque control means avoids the air/fuel ratio of such a value that an amount of discharge of NOx is increased, and at this time said drive torque control means controls a throttle valve opening degree in such a manner that a step will not develop in the drive torque.

A method of controlling an internal combustion engine wherein fuel injection means has a port for injecting fuel into a combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a drive torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission, in which the fuel amount is controlled at a time of shifting the gear position of said transmission so that the drive torque will not be varied.

A method of controlling an internal combustion engine wherein fuel injection means has a port for injecting fuel into a combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a drive torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission, in which the air/fuel ratio is changed at a time of shifting the gear position of said transmission, and at this time a gear ratio of said transmission is selected so that the torque will not be varied.

A method of controlling an internal combustion engine wherein fuel injection means has a port for injecting fuel into a combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a drive torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission, in which at a time of selecting the minimum gear ratio, there is avoided an air/fuel ratio of such a value that an amount of discharge of NOx is increased, and at this time a throttle valve opening degree is so controlled that a step will not develop in the drive torque.

Apparatus for controlling an internal combustion engine comprising a system comprising (i) fuel injection means having a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, (ii) air amount control means for controlling an amount of air within a cylinder, and (iii) torque control means for controlling a torque in accordance with at least one of the fuel injection amount and the air amount, in which when the torque is smaller than a predetermined value, said torque control means controls a throttle valve while keeping the air/fuel ratio generally constant, and when the torque is larger than said predetermined value, said torque control means varies the air/fuel ratio within a range to control the torque.

Apparatus for controlling an internal combustion engine comprising a system comprising (i) fuel injection means having a port for injecting fuel into the combustion chamber of the internal combustion engine, (ii) air amount control means for controlling an amount of air within a cylinder, and (iii) torque control means for controlling a torque in accordance with at least one of the fuel injection amount and the air amount, in which when the torque is smaller than a predetermined value, said torque control means controls a throttle valve while keeping the air/fuel ratio generally constant, and when the torque is larger than said predetermined value, said torque control means varies the air/fuel ratio within a range greater than a stoichiometric ratio to control the torque, and wherein the torque control means operates to keep the amount of NOx produced by combustion small.

Apparatus for controlling an internal combustion engine comprising a system comprising (i) fuel injection means having a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, (ii) air amount control means for controlling an amount of air within a cylinder, and (iii) torque control means for controlling a torque in accordance with at least one of the fuel injection amount and the air amount, in which when the torque is smaller than a predetermined value, said torque control means controls a throttle valve while keeping the air/fuel ratio generally constant, and when the torque is larger than said predetermined value, said torque control means varies the air/fuel ratio within a range greater than a stoichiometric ratio to control the torque, and wherein the torque control means operates to keep the amount of NOx produced by combustion small.

A method of controlling an internal combustion engine wherein a fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling torque at an output side of the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means such that when torque at an output side of the internal combustion engine is small, a throttle valve is controlled while keeping the air/fuel ratio generally constant, and when the torque is large, the air/fuel ratio is controlled to vary within a range to control the torque.

A method of controlling an internal combustion engine wherein fuel injection means has a port for injecting fuel into a combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, a throttle valve is controlled while keeping the air/fuel ratio generally constant, and when the torque is large, the air/fuel ratio is controlled within a range greater than a stoichiometric ratio to control the torque and to keep the amount of NOx produced by combustion small.

A method of controlling an internal combustion engine wherein fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, a throttle valve is controlled while keeping the air/fuel ratio generally constant, and when the torque is large, the air/fuel ratio is controlled within a range greater than a stoichiometric ratio to control the torque and to keep the amount of NOx produced by combustion small.

Apparatus for controlling an internal combustion engine comprising a system comprising:

• (i) fuel injection means having a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine,
• (ii) air amount control means for controlling an amount of air within a cylinder, and
• (iii) torque control means for controlling a torque in accordance with at least one of the fuel injection amount and the air amount, in which when the torque is smaller than a predetermined value, said torque control means varies the air/fuel ratio within a range to control the torque, and when the torque is larger than said predetermined value, said torque control means controls a throttle valve while keeping the air/fuel ratio generally constant.

Apparatus for controlling an internal combustion engine comprising a system comprising:

• (i) fuel injection means having a port for injecting fuel into the combustion chamber of the internal combustion engine,
• (ii) air amount control means for controlling an amount of air within a cylinder, and
• (iii) torque control means for controlling a torque in accordance with at least one of the fuel injection amount and the air amount, in which when the torque is smaller than a predetermined value, said torque control means varies the air/fuel ratio within a range to control the torque, and when the torque is larger than said predetermined value, said torque control means controls a throttle valve while keeping the air/fuel ratio generally constant, and wherein the torque control means operates to keep the amount of NOx produced by combustion small.

An apparatus for controlling an internal combustion engine comprising a system comprising:

• (i) fuel injection means having a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine,
• (ii) air amount control means for controlling an amount of air within a cylinder, and
• (iii) torque control means for controlling a torque in accordance with at least one of the fuel injection amount and the air amount, in which when the torque is smaller than a predetermined value, said torque control means varies the air/fuel ratio within a range to control the torque, and when the torque is larger than said predetermined value, said torque control means controls a throttle valve while keeping the air/fuel ratio generally constant, and wherein the torque control means operates to keep the amount of NOx produced by combustion small.

A method of controlling an internal combustion engine wherein a fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling torque at an output side of the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means such that when torque at an output side of the internal combustion engine is small, the air/fuel ratio is controlled to vary within a range to control the torque, and when the torque is large, a throttle valve is controlled while keeping the air/fuel ratio generally constant.

A method of controlling an internal combustion engine wherein fuel injection means has a port for injecting fuel into a combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, the air/fuel ratio is controlled to vary within a range to control the torque and to keep the amount of NOx produced by combustion small, and when the torque is large, a throttle valve is controlled while keeping the air/fuel ratio generally constant.

A method of controlling an internal combustion engine wherein fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, the air/fuel ratio is controlled to vary within a range to control the torque and to keep the amount of NOx produced by combustion small, and when the torque is large, a throttle valve is controlled while keeping the air/fuel ratio generally constant.

A method of controlling an internal combustion engine wherein a fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling torque at an output side of the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means such that when torque at an output side of the internal combustion engine is small, the engine torque is changed while keeping the air/fuel ratio generally constant, and when the torque is large, the engine torque is changed when the air/fuel ratio is varied.

A method of controlling an internal combustion engine wherein fuel injection means has a port for injecting fuel into a combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, the engine torque is changed while keeping the air/fuel ratio generally constant, and when the torque is large, the engine torque is changed within a range greater than a stoichiometric ratio when the air/fuel ratio is varied while keeping the amount of NOx produced by combustion small.

A method of controlling an internal combustion engine wherein fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, the engine torque is changed while keeping the air/fuel ratio generally constant, and when the torque is large, the engine torque is changed within a range greater than a stoichiometric ratio when the air/fuel ratio is varied while keeping the amount of NOx produced by combustion small.

A method of controlling an internal combustion engine wherein a fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls and amount of air within a cylinder, comprising:

• controlling torque at an output side of the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means such that when torque at an output side of the internal combustion engine is small, the engine torque is changed when the air/fuel ratio is varied, and when the torque is large, the engine torque is changed while keeping the air/fuel ratio generally constant.

A method of controlling an internal combustion engine wherein fuel injection means has a port for injecting fuel into a combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, the engine torque is changed when the air/fuel ratio is varied while keeping the amount of NOx produced by combustion small, and when the torque is large, the engine torque is changed while keeping the air/fuel ratio generally constant.

A method of controlling an internal combustion engine wherein fuel injection means has a port disposed inside a combustion chamber for injecting fuel into the combustion chamber of the internal combustion engine, and air amount control means controls an amount of air within a cylinder, comprising:

• controlling a torque at an output side of a transmission connected to the internal combustion engine in accordance with at least one of an amount of the fuel injected from said fuel injection means and the amount of the air controlled by said air amount control means and a gear shift position of said transmission in which when a torque at an output side of the internal combustion engine is small, the engine torque is changed when the air/fuel ratio is varied while keeping the amount of NOx produced by combustion small, and when the torque is large, the engine torque is changed while keeping the air/fuel ratio generally constant.