Volvo Car Corporation

Anders Petrén

Peter Kroon

Jan Dahlgren

Niklas Sjoeholm

A compact assembly for accurately measuring the air flow in an air intake duct of an internal combustion engine that is easy to manufacture and maintain. The assembly includes a housing with an inlet opening, an outlet opening, a channel with an inner wall defining a predetermined cross-sectional area and a closure member that is movably mounted in the channel between a closed and opened position. A first annular chamber is situated upstream from the closure member and a second annular chamber is placed downstream of the closure member. Each chamber has an inner chamber wall with a number of apertures that are in fluid communication with the channel. A first pressure sensor is connected to the first chamber for measuring a pressure, and a second pressure sensor is connected to the first chamber and the second chamber for measuring a difference in pressure.

Pressure sensor system for charge air load control

An exhaust gas recirculation (EGR) system utilizes an intake air pre-heater to selectively heat the cool, dry intake air prior to the mixing point with the hot, humid EGR gases. This intake air pre-heater utilizes available heat from a high pressure (HP) EGR heat exchanger, circulating a cooling/heating fluid between the HP EGR heat exchanger and the intake air pre-heater. The intake air pre-heater is disposed in an intake air filter box, optionally on the dirty side of the air filter, and includes a heat exchanger conduit that is contacted with the intake air. The selective operation of the intake air pre-heater is controlled via an electronic control module (ECM) of the vehicle, based on the operating conditions of the vehicle and an appropriate temperature control model. Flow of the cooling/heating fluid is selectively enabled/disabled by a pump and/or valve assembly disposed along the associated high temperature (HT) cooling/heating circuit.

Vehicle exhaust gas recirculation system utilizing an intake air pre-heater

An intake air filter box utilizing an intake air heater that inhibits the buildup of snow and ice within the intake air filter box, keeping the associated flow passages clear such that pressure loss is not adversely affected. This intake air heater can include an electric heater or a radiant heater coupled to the exhaust gas recirculation (EGR) system of the vehicle, or to another source of heated fluid. Preferably, the intake air heater is disposed on the 'dirty' side of the filter disposed within the intake air filter box, adjacent to the intake air conduit and air intake of the vehicle. This is where the snow and ice accumulation occurs. A drain is provided in the bottom of the intake air filter box housing to allow the escape of water from the melted snow and ice, ensuring that this moisture is not delivered to the turbocharger and engine with the intake air.

Vehicle intake air heater

A screw assembly element in a first part is provided for use when attaching the first part to a second part using a screw. The assembly element comprises a sleeve arranged in a hole in the first part, the sleeve being cylindrical. At least a portion of the first part extends into the inside of the sleeve.

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Marstrand, Sweden

Anders Petrén