A control device of an internal combustion engine can respond to the variation of the flow reduction rate attributable to the difference in a clogging condition, and which can detect a deposit accumulation amount even if no idle condition is provided like HEV, etc. In a control device of an internal combustion engine, a map correction section determines a correction amount in accordance with an approximate line result based on an air amount at a predetermined opening degree at which the measurement of the air amount by an air flow meter is sufficiently performed with the exception of a first predetermined opening degree in the case where the measurement of the air amount by the air flow meter has not been performed sufficiently in the first predetermined opening degree in a current operation cycle.

A brake controller operates PTC when an obstacle sensor detects an obstacle ahead, a vehicle speed sensor detects a vehicle speed equal to or lower than a predetermined vehicle speed, and an operation of an accelerator pedal equal to or greater than a predetermined depression amount is detected. When detection of the obstacle ahead is lost while the PTC is operating and the PTC is to be cancelled, the brake controller operates a power limiting control if a depression operation of the accelerator pedal is detected. The power limiting control limits an engine power to cause acceleration to be lower than a requested acceleration corresponding to a depression amount of the accelerator pedal.

A throttle valve having: a valve body; an intake duct obtained in the valve body; a throttle plate arranged in the intake duct; a shaft mounted so as to rotate, supporting the throttle plate; an electric motor; a gear transmission, which couples the electric motor to the shaft and has an end gear which is integral with the shaft; a return spring, which is designed to rotate the throttle plate towards a closing position; a striking element, which is obtained in the valve body and establishes an intermediate position of partial opening; and a countering spring, mounted on the end gear, which is designed to rotate the throttle plate towards the intermediate position and has one end which is designed to rest against the striking element during the rotation of the end gear.

A throttle device includes a default mechanism. The default mechanism includes: a defining portion arranged on the body to define the default position; a first rotation body which rotates integrally with the valve shaft; a second rotation body which can rotate relative to the valve shaft and which engages with the defining portion to limit the rotation in a valve-closing direction; a first urging spring which is interposed between the first rotation body and the body and urges the first rotation body in the valve-closing direction; and a second urging spring which is interposed between the first rotation body and the second rotation body, and urges so as to draw the first rotation body in a valve-opening direction and draw the second rotation body in the valve-closing direction to engage the two with each other and to maintain the engagement during the non-operation of the drive source.

A control unit controls a combustion state of an internal combustion engine in accordance with a drive torque requested by a driver. The control unit performs a switching control to switch at least a combustion state between lean-burn combustion and stoichiometric combustion. A monitor unit performs torque monitoring to determine abnormality of a request torque, which is requested to the internal combustion engine, and a generated torque of the internal combustion engine based on the request torque and an estimation torque, which is an estimation value of an actual torque of the internal combustion engine. A combustion state determining unit determines whether the combustion state in the control unit is the lean-burn combustion or the stoichiometric combustion. A computing unit computes the estimation torque in accordance with the combustion state determined by the combustion state determining unit.

An electronic control unit includes a computer that outputs a monitoring signal and an external monitoring circuit that monitors a state of the computer based on the monitoring signal. The computer includes a monitoring signal output section that generates and outputs the monitoring signal to the external monitoring circuit by performing a software process; a self-diagnostic section that self-diagnoses the computer and detects an abnormality by identifying a cause of the abnormality; and a break signal output section that outputs a break signal to interrupt an input of the monitoring signal to the external monitoring circuit by performing a hardware process when an abnormality in the monitoring signal output section is detected.

Methods and systems are provided for diagnosing the presence or absence of a catalyst substrate within a catalyst can or housing. The methods and systems described a persistence of excitation metric that is a basis for judging whether or not the catalyst can is empty. If it is determined that the catalyst can or housing is empty, mitigating control actions may be performed via a controller.

A control arithmetic unit uses a control storage area and computes a target control amount for combustion of an internal combustion engine according to a user required torque. A monitoring arithmetic unit uses a monitoring storage area and performs computation and monitoring of presence or absence of a torque anomaly state in which an estimated torque is deviated from an engine required torque by a predetermined amount or more. The monitoring arithmetic unit includes an engine required torque computation unit that computes the engine required torque and an estimated torque computation unit that computes the estimated torque. The engine required torque computation unit computes a reduction in an actual torque, which is caused in conjunction with a retard in ignition timing of the internal combustion engine, as a reserve torque and computes the engine required torque based on the calculated reserve torque and the user required torque.

An emergency vehicle throttle management system includes a system controller having a main body, a processor, a memory, a multiplex connectivity component, a powertrain connectivity component, and a life safety connectivity component. The life safety connectivity component functioning to communicate directly with one of the life safety systems onboard the emergency vehicle. The powertrain connection component functioning to communicate with the powertrain components of the emergency vehicle which are mechanically coupled to the life safety system. The system controller including functionality for transmitting a powertrain resource request to the powertrain of the emergency vehicle in response to a throttle adjustment request received from the life safety system or a command from the throttle pedal of the vehicle. A throttle rule management unit evaluates error notifications received from the multiplex system, and selectively instructs the throttle source circuit to generate powertrain resource requests.

A control method for an internal combustion engine including: setting a target valve opening degree of the first throttle valve in accordance with a load, sensing a valve opening degree of the second throttle valve, judging whether or not the valve opening degree of the second throttle valve is an opening degree on a closing side relative to a predetermined set valve opening degree, and correcting the valve opening degree of the first throttle valve to the opening degree on the closing side relative to the target valve opening degree when it is judged that the valve opening degree of the second throttle valve is the opening degree on the closing side relative to the predetermined set valve opening degree.