A method of implementing control logic of a compression-ignition engine is provided. A control part of the engine performs a calculation according to the control logic corresponding to an engine operating state in response to a measurement of a measurement part, controls a fuel injection part, a variable valve operating mechanism, an ignition part and a supercharger so that a G/F becomes leaner than a stoichiometric air fuel ratio and a A/F becomes equal to or richer than the stoichiometric air fuel ratio, while causing the supercharger to boost, and controls the ignition part so that unburnt mixture gas combusts by self-ignition after the ignition. The method includes determining a supercharging pressure P, and determining control logic defining a close timing IVC of an intake valve. When determining the control logic, the close timing IVC (deg.aBDC) is determined so that the supercharging pressure P (kPa) satisfies the following expression: P8.010.sup.11IVC.sup.61.010.sup.8IVC.sup.5+3.010.sup.7IVC.sup.44.010.sup.6IVC.sup.3+0.0068IVC.sup.20.3209IVC+116.63.

A combustion pressure detection method and a combustion pressure detection apparatus of an internal combustion engine that can detect combustion pressure by using a crank angle sensor in an accurate and easy way. A relationship between a crank angle sensor signal and a combustion pressure signal is previously recorded. As a result, even if the combustion pressure sensor fails, the combustion pressure is detected by collating the crank angle sensor signal with the relationship.

A method of implementing control logic of a compression-ignition engine is provided. A control part of the engine performs a calculation according to the control logic corresponding to an engine operating state in response to a measurement of a measurement part, controls a fuel injection part, a variable valve operating mechanism, an ignition part and a supercharger so that a G/F becomes leaner than a stoichiometric air fuel ratio and a A/F becomes equal to or richer than the stoichiometric air fuel ratio, while causing the supercharger to boost, and controls the ignition part so that unburnt mixture gas combusts by self-ignition after the ignition. The method includes determining a supercharging pressure P, and determining control logic defining a close timing IVC of an intake valve. When determining the control logic, the close timing IVC (deg.aBDC) is determined so that the supercharging pressure P (kPa) satisfies the following expression: P8.010.sup.11IVC.sup.61.010.sup.8IVC.sup.5+3.010.sup.7IVC.sup.44.010.sup.6IVC.sup.3+0.0068IVC.sup.20.3209IVC+116.63.

Disclosed is a complementary analog and digital method for controlling ignition of a gasoline engine. First, analog ignition is performed by means of an analog trigger circuit. After power has been steadily supplied to a microcontroller, the microcontroller disconnects the analog trigger circuit, starts to collect a digital trigger reference signal and turn on a digital trigger circuit, and switches to a digital signal to trigger ignition. Also disclosed is a complementary analog and digital system for controlling ignition of a gasoline engine.

A combustion pressure detection method and a combustion pressure detection apparatus of an internal combustion engine that can detect combustion pressure by using a crank angle sensor in an accurate and easy way.

A relationship between a crank angle sensor signal and a combustion pressure signal is previously recorded. As a result, even if the combustion pressure sensor fails, the combustion pressure is detected by collating the crank angle sensor signal with the relationship.

A throttle-controlled intake system is disclosed that provides a driver of a vehicle with greater control over engine functions and vehicle performance. The throttle-controlled intake system includes a control module that is coupled with an aircharger air intake. The control module processes input signals from a throttle pedal of the vehicle and sends modified throttle position signals to a throttle body of the vehicle so as to increase throttle responsiveness of the vehicle. The throttle-controlled intake system further includes a wiring harness and a signal adjuster. The wiring harness electrically couples the control module with the throttle pedal and the throttle body. The control module sends signals directly to the throttle body of the engine, bypassing an electronic control unit of the vehicle. The signal adjuster includes a rheostat that enables manual adjustment of the throttle responsiveness of the vehicle.

Systems and methods for controlling performance characteristics of a vehicle are provided. A system for controlling performance characteristics of a vehicle includes a memory storage device including at least one torque curve profile stored thereon. The at least one torque curve profile includes a mapping of accessible torque for the vehicle with respect to an engine speed of an engine coupled to the vehicle. The system also includes an electronic control unit operatively coupled to the memory storage device, the electronic control unit configured to re-map the at least one torque curve profile in response to receipt by the electronic control unit of an electronic signal indicating a change in a vehicle condition.

A throttle-controlled intake system is disclosed that provides a driver of a vehicle with greater control over engine functions and vehicle performance. The throttle-controlled intake system includes a control module that is coupled with an aircharger air intake. The control module processes input signals from a throttle pedal of the vehicle and sends modified throttle position signals to a throttle body of the vehicle so as to increase throttle responsiveness of the vehicle. The throttle-controlled intake system further includes a wiring harness and a signal adjuster. The wiring harness electrically couples the control module with the throttle pedal and the throttle body. The control module sends signals directly to the throttle body of the engine, bypassing an electronic control unit of the vehicle. The signal adjuster includes a rheostat that enables manual adjustment of the throttle responsiveness of the vehicle.