A characteristic determining device is provided which determines fuel injection characteristics of a plurality of fuel injectors for an internal combustion engine. The characteristic determining device includes a pressure sensor and a plurality of pipes each of which connects between the pressure sensor and one of the fuel injectors. The pressure sensor is designed to have a plurality of pressure inputs from the respective fuel injectors through the pipes and outputs a signal indicative of a level of pressure in each of the fuel injectors. The characteristic determining device analyzes the signals from the first pressure sensor to determine the fuel injection characteristics of the respective fuel injectors. These arrangements result in a simplified structure of the characteristic determining device and a decreased manufacturing cost thereof.

Methods and systems are provided for detecting a temperature of an engine fuel rail at a plurality of locations along the engine fuel rail. In one example, a method may include detecting temperatures along the engine fuel rail with a plurality of metal film thermocouples adhered to the engine fuel rail and arranged proximate to engine fuel injectors, and adjusting fuel injector operation and/or fuel rail pressure in response to the detected fuel rail temperatures.

An engine ECU is provided with an abnormality-diagnosis unit performing an abnormality diagnosis of an Air-Con ECU, and a monitoring IC monitoring the abnormality-diagnosis unit. The abnormality-diagnosis unit determines whether the output signal of the Air-Con ECU is normal based on the specified criterion value, so that the abnormality diagnosis of the Air-Con ECU is performed. The monitoring IC determines whether a criterion value is normal, which is used during the abnormality diagnosis of the Air-Con ECU. The abnormality-diagnosis unit performs an abnormality diagnosis of the monitoring IC. When the monitoring IC determines that the criterion value is abnormal or the abnormality-diagnosis unit determines that the monitoring IC is abnormal, the abnormality diagnosis of the Air-Con ECU is prohibited and a specified operation for abnormality is performed.

Examples of the present disclosure describe systems and methods for determining a state of an air diverter valve of an air induction system of a vehicle. The determined state of the air diverter valve may be based on an intercooler-based estimated ambient air temperature and a comparison between an ambient air temperature sensor value and a pre-compressor sensor value.

A construction machine management system in which a failure analysis or a failure-omen diagnosis of a machine body can be performed with a high degree accuracy and at a low cost is provided. In a machine body group of construction machines including at least one representative machine body having an engine control unit that detects a cumulative stress value of a diesel engine of the construction machine and a crankcase pressure sensor that detects a crankcase pressure, and at least one general machine body that has an engine control unit but does not have a crankcase pressure sensor, a center server performs a diagnosis of an omen of a failure state regarding the crankcase pressure of the general machine body based on correlation information between the cumulative stress value and the crankcase pressure obtained from the representative machine body and the cumulative stress value of the general machine body.

A method for controlling an internal combustion engine, wherein a first engine control device generates a control signal to actuate a function of the engine. A switchover device transmits the control signal of the first control device to the engine to actuate the function of the engine. The first control device transmits a sign-of-life signal which indicates functionality of the control device to the switchover device. The first engine control device does not transmit the sign-of-life signal or transmits the signal incorrectly if a fault occurs which endangers proper actuation of the function of the engine by the first engine control device. If the sign-of-life signal of the first engine control device is not or is incorrectly received by the switchover device, the switchover device stops transmitting the control signals of the first engine control device and starts transmitting a control signal generated by a second engine control device to the engine to actuate the function of the engine.

A method of diagnosing a temperature sensor provided at a rear stage of an air filter includes: comparing a heating condition factor with a factor threshold; when the heating condition factor is less than the factor threshold, calculating a deviation between a temperature of an intake manifold and a temperature of intake air at a rear stage of an air filter; comparing a temperature threshold with the deviation; and, when the deviation exceeds the temperature threshold, diagnosing the intake air temperature sensor provided at the rear stage of the air filter as failing. According to the method, failure of a temperature sensor provided at a rear state of an air filter of an engine room can be diagnosed.

A vehicle start-up mechanism is provided in a vehicle configured to travel while occupants are boarded in a vehicle cabin. The vehicle start-up mechanism includes: a first vehicle start-up switch configured to switch the state of the vehicle between the start-up state and the halt state; and a switch box provided on an outer surface of the vehicle and having the first vehicle start-up switch. The vehicle has an autonomous driving function.

Examples of the present disclosure describe systems and methods for determining a state of an air diverter valve of an air induction system of a vehicle. The determined state of the air diverter valve may be based on an intercooler-based estimated ambient air temperature and a comparison between an ambient air temperature sensor value and a pre-compressor sensor value.

A redundant mechatronic system. The redundant mechatronic system is formed with two channels and is or can be connected for the output of a varying mechanical power to a mechanical arrangement, wherein each of the two channels includes an energy supply and an actuation circuit or a common energy supply is connected upstream of both channels, and both channels can be controlled by at least one control unit. The control unit acts on the actuation circuits in such a manner that the actuation circuits in each case switch an electric power specified by the control unit and drawn from the energy supply through to in each case a winding set of at least one electrically operated actuator, in order to generate the mechanical power. The two channels are operated in parallel during normal operation, in such a manner that each channel provides half of the mechanical power to be instantaneously output.