An internal combustion engine has a tank ventilation system and a crankcase ventilation system. The tank ventilation system is connectable to an intake system downstream of a throttle element via a first non-return valve in a first line and upstream of a compressor via a second non-return valve in a second line and a third non-return valve in a second sub-line. The crankcase ventilation system is connectable to the intake system downstream of the throttle element via a fourth non-return valve in a third line and upstream of the compressor via a fourth line and the third non-return valve. The intake system is connectable to the second line downstream of the throttle element at a transitional point between the second line and the second sub-line via a fifth nonreturn valve in a fifth line. A nozzle is formed at the transitional point from the fifth line to the second line and the second sub-line, and the second line opens into the nozzle downstream of the second non-return valve. A first pressure sensor for measuring the pressure in the second line is provided in the second line between the second non-return valve and the nozzle. Only a single pressure sensor is required to diagnose or detect a leak.

To provide a gas sensor device having improved measurement accuracy. This gas sensor device is provided with: a sensor element that detects the concentration of a gas by means of heat dissipation from a heat generating body; and a cover with which the sensor element is covered. The cover has a plurality of ventilation sections, which are disposed by being separated with each other in the direction perpendicular to the flowing direction of the gas, and the sensor element is disposed between the ventilation sections.

The invention relates to an internal combustion engine having a fuel tank (36), a tank ventilation line (38) and a Venturi nozzle (30) disposed in a fluid-carrying component (16), wherein the Venturi nozzle (30) has an inflow channel (28), an opening point (40) adjoining downstream of the inflow channel (28) with a fluid connection to the tank ventilation line (38), and an outflow channel (32) adjoining downstream of the opening point (40). In this case, an outflow section (48) of the Venturi nozzle downstream of the opening point (48) is surrounded by the component (16) in such a manner that a detection space (46) is formed around the outflow section (48), wherein the detection space (46) has at least one inlet opening (50) via which the detection space (46) can be pressurized and wherein at least one pressure sensor (34) for monitoring the pressure in the detection space (46) is provided.

The speed of a turbocharger may be estimated using data from sensors that are readily available in most engine management systems. In some cases, a pressure measurement from a MAP sensor may be used, in combination with one or more computational models, to provide an efficient, lower cost estimate of turbo speed that can be used to control operation of the engine and/or the turbocharger.

A controller for an internal combustion engine is configured to execute a first injection process that causes a water injection valve to inject water when an intake valve is open and a second injection process that causes the water injection valve to inject water when the intake valve is closed. The controller is further configured to set a pressure of the water supplied to the water injection valve to be higher in the second injection process than in the first injection process.

An intake manifold includes a surge tank and left and right intake pipes. On a part of an outer periphery portion of the surge tank that faces a front direction or a rear direction of a vehicle, a pressure measurement portion to measure pressure in the surge tank is provided. A pressure sensor is attached to the pressure measurement portion. A sensing space containing one end side that is opened in the surge tank and the other end side in which a pressure sensing portion of the pressure sensor is disposed is formed on the pressure measurement portion. A bottom surface constituting the sensing space of the pressure measurement portion is inclined downwardly toward an opening portion to the surge tank.

A method for diagnosing a waste gate valve malfunction in a power generation system is presented. The method includes determining an actual pressure differential across a throttle valve. The method further includes determining an estimated pressure differential across the throttle valve based on one or more first operating parameters of the power generation system. Furthermore, the method includes determining an absolute difference between the actual pressure differential and the estimated pressure differential. Moreover, the method also includes comparing the absolute difference with a threshold value and if the absolute difference is greater than the threshold value, determining an operating condition of the throttle valve. Additionally, the method includes determining whether the waste gate valve has malfunctioned based on the determined operating condition of the throttle valve. An engine controller and a power generation system employing the method are also presented.

A blow-by gas treatment device includes a first blow-by gas pipe, a second blow-by gas pipe, a first pipe joint located on a first head cover, the first blow-by gas pipe being connected to the first pipe joint, a second pipe joint located on a second head cover, the second blow-by gas pipe being connected to the second pipe joint, a first union located on the first pipe joint, a second union located on the second pipe joint, and a pressure sensor connected to the first pipe joint by the first union and connected to the second pipe joint by the second union.

A physical quantity measurement device includes a housing forming a measurement flow path, a physical quantity sensor that detects a physical quantity of fluid in the measurement flow path, and a sensor support that supports the physical quantity sensor. The sensor support includes a support front surface on which the physical quantity sensor is disposed, and a support back surface behind the support front surface. The housing includes a floor surface facing a support end of the sensor support, a front wall surface facing the support front surface, and a back wall surface opposite to the front wall surface across the floor surface and facing the support back surface. A front distance between the physical quantity sensor and the front wall surface in a front-back direction is larger than a floor distance between the floor surface and the support end in a height direction orthogonal to the front-back direction.

A physical quantity measurement device includes a housing forming a measurement flow path through which the fluid flows and a container space that houses a part of a detection unit. An inner surface of the housing includes a housing intersecting surface that intersects an arrangement direction in which the measurement flow path and the container space are arranged, a housing flow path surface extending from the housing intersecting surface toward the measurement flow path, and a housing container surface extending from the housing intersecting surface toward the container space. The housing includes a housing partition that protrudes from the inner surface toward the detection unit and contacts the detection unit between the housing and the detection unit such that the housing partition separates the measurement flow path and the container space from each other.