Abstract: An intercooler comprises a plurality of plastic cooling tubes extending between a first end plate and a second end plate and a baffle arranged in the intercooler and extending at least partially between the first end plate and the second end plate. The baffle comprises a plurality of first openings for receiving a respective plastic cooling tube, the baffle further comprising a plurality of second openings arranged between the first openings. The second openings permit air to flow through the intercooler whilst creating turbulence in the air flow which increase the thermal transfer between the air and the tubes increasing the efficiency of the intercooler.

Abstract: An HQ tube arrangement suitable for packaging within a vehicle includes a first passageway having a fluid inlet and a fluid outlet and a second passageway located adjacent the first passageway. The second passageway is fluidly connected to the first passageway at first and second spaced apart junctions with the second passageway being divided by the junctions into first, second and third passages. The second passageway includes first and second opposing terminal ends respectively spaced from the first and second junctions wherein portions of the first, second and third passageways are oriented in a substantially similar direction to that of the first passageway to form a substantially rectangular configuration.

Abstract: An air introduction system (10) includes an active noise control system (22) having an environmentally protected microphone (24). A microphone support structure (26) defines a louvered cage (38) over a microphone reception cavity (40). The microphone (24) is mounted to a circuit board (42) which fits within the microphone reception cavity (40). A cover (42) fits into the cavity (40) to encase the microphone (24) therein. An open cell foam (60) surround the microphone (24) and a waterproof material (58) encases the foam (60). The waterproof material (58) includes an excess of material such that waterproof material provides for internal air expansion and contraction. By locating the foam (60) between the microphone (24) and the waterproof material (58) improved transmission of acoustic waves is provided which thereby maintains microphone sensitivity.

Abstract: An air introduction system (b 10) includes an active noise control system (22) having an environmentally protected microphone (24). A microphone support structure (26) defines a louvered cage (38) over a microphone reception cavity (40). The microphone (24) is mounted to a circuit board (42) which fits within the microphone reception cavity (40). A cover (42) fits into the cavity (40) to encase the microphone (24) therein. An open cell foam (60) surround the microphone (24) and a waterproof material (58) encases the foam (60). The waterproof material (58) includes an excess of material such that waterproof material provides for internal air expansion and contraction. By locating the foam (60) between the microphone (24) and the waterproof material (58) improved transmission of acoustic waves is provided which thereby maintains microphone sensitivity.

Abstract: The air induction system comprises an air induction body having a mouth. A speaker and microphone are both operatively connected to the air induction body. A support connects the microphone to the air induction body. The support may be rigid and extend over only a portion of the face of the speaker. The support may also be spaced a predetermined distance from the speaker face. This distance may relate to the location of the sound field emitted by the speaker. Both the speaker and microphone are in communication with a control unit. The microphone receives sound and communicates this sound to the control unit. The control unit then generates a noise attenuation sound through the speaker.

Abstract: An apparatus for providing an indication of the level of smoke in an engine exhaust includes a radiation sensor which is mounted in a combustion chamber of the engine. The signal produced by the sensor during combustion of fuel is processed to produce a signal representing the period of combustion of fuel in the cylinder and this signal is applied to a map which contains recorded data showing the relationship between the combustion period and the level of smoke. From the map the level of smoke can be obtained.

Abstract: A fuel injection nozzle for supplying fuel to a compression ignition engine includes a holder which accommodates a spring which biases the valve member of the nozzle to the closed position. A spring abutment abuts against a surface of the holder and a blind bore is formed in the holder in the vicinity of the surface. A transducer is located in the bore and produces an electrical signal when an increase in the stress in the spring occurs as the valve member is moved to the open position.

Abstract: A sensing device for use in an internal combustion engine to sense combustion of fuel in a combustion chamber of the engine includes a tubular body part in which is located a radiation conductive element one end of which is exposed to the combustion chamber in use. On the other end of the element is a sensor which in use is connected in an electrical circuit. The sensor is responsive to radiation transmitted along the element from the flame in the combustion chamber. The element is held in a bore of the body part by a visco-elastic lining which also provides a gas tight seal and acts to cushion the element against vibration.