Methods and systems are provided for variable thermal capacity charge air cooler (VTC-CAC). In one example, the VTC-CAC includes a plurality of cooling channels and an integrated bypass that diverts air around the cooling channels. Division of boosted intake air between the cooling channels and the bypass is regulated by a positioning of dual-gate mechanism that is adjusted in response to manifold charge temperature.

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 hybrid intercooler system is provided and includes an air cooler that is configured to exchange heat with exterior air passing through an outer wall of a plurality of compressed intake air paths to cool a compressed intake air passing through the inside of the compressed intake air paths. Further, a water cooler is configured to exchange heat between a water cooler coolant enclosing the outer wall of the compressed intake air paths and the compressed intake air which is cooled in the air cooler. The water cooler includes a water cooler coolant tank that encloses the compressed intake air paths.

A turbocharger (1) includes a turbine wheel (3) driven by exhaust gas, first and second compressor wheels (4, 5) coaxially coupled to the turbine wheel (3) via a shaft member (6), a compressor housing (8) accommodating the first and second compressor wheels (4, 5) and having defined therein a communication passage (17) through which air compressed by the first compressor wheel (4) flows to the second compressor wheel (5), and an electric motor (11) arranged in the communication passage (17) and using the shaft member (6) as a rotation shaft thereof.

Embodiments of methods and systems related to operating a mobile asset are provided. In one example, a method for operating a mobile asset includes supplying an engine with a fuel controller a first amount of a first fuel and a second amount of a second fuel and combusting the first fuel and the second fuel at a fuel combustion ratio in at least one cylinder of the engine, the first amount and the second amount being selected based on route information for a route along which the mobile asset is operable to travel and a projected exhaustion of the first fuel that does not precede a projected exhaustion of the second fuel, wherein the mobile asset is unable to operate with the second fuel alone.

Methods and systems are provided for adjusting combustion parameters to increase combustion stability during conditions when condensate formed in a charge air cooler may enter cylinders of an engine. In response to increased mass air flow and a condensate level in the charge air cooler, the engine may combust a rich air-fuel ratio while increasing a positive valve overlap.

A vehicle includes a body, a bumper and a plurality of self-tapping fasteners. The body defines mounting orifices. The bumper has an exterior shell that includes an interior wall. The interior wall has receiving portions that protrude inward relative to the shell such that the receiving portions are thicker than adjacent portions of the interior wall. Each of the plurality of self-tapping fasteners extend through one of the orifices and into one of the receiving portions to secure the bumper to the body.

A charge air cooler (CAC) includes a first header including a first interior portion, a second header spaced from the first header. The second header includes a second interior portion. At least one conduit extends between the first header and the second header. The at least one conduit includes a first end fluidically connected to the first interior portion, a second end fluidically connected to the second interior portion, and an intermediate portion extending therebetween. A heating system is arranged in a heat exchange relationship with the at least one conduit. The heating system is selectively operable to increase a temperature of fluids passing through the at least one conduit into one of the first and second headers.

A vehicle includes a body, a bumper and a plurality of self-tapping fasteners. The body defines mounting orifices. The bumper has an exterior shell that includes an interior wall. The interior wall has receiving portions that protrude inward relative to the shell such that the receiving portions are thicker than adjacent portions of the interior wall. Each of the plurality of self-tapping fasteners extend through one of the orifices and into one of the receiving portions to secure the bumper to the body.

A propulsion assembly for a motor vehicle with an internal combustion engine comprising at least one movable member, a turbocharger comprising a turbine adapted to expand exhaust gases to generate work and a first compressor adapted to compress air by means of the work generated by the turbine, an intake line connecting an outlet of the first compressor to an intake manifold of said engine to supply compressed air from the first compressor to said engine, wherein the intake line comprises a second compressor, which in turn comprises a compressor shaft rotatable about a first axis and is configured to further compress the compressed air from the first compressor via a rotation of the compressor shaft. The propulsion assembly further comprises mechanical transmission means configured to couple the movable member to the compressor shaft, thereby determining a transmission of motion from the movable member to the compressor shaft.