Abstract: Engine speed is controlled during gear change by way of both fuel supply apparatus and exhaust brake so that engine speed is equal to the rotational speed of an input shaft of a transmission coupled via a clutch to the engine. When the engine speed is higher than the rotational speed of the transmission input shaft, exhaust braking is performed to quickly reduce the engine speed thereby establishing synchronization. Then the fuel supply apparatus is controlled to reduce the amount of fuel for maintaining the decreased engine speed. On the other hand, when the engine speed is lower than the rotational speed of said transmission input shaft, only the fuel supply apparatus is controlled to increase the fuel amount. Engine braking is performed only when the clutch is in disconnected state, and therefore, vehicle speed is not decelerated due to the engine braking.

Abstract: A compact single- or multi-channel radiation detector capable of sending forth a large and stable output signal by being operated in a proportional region which comprises a single or a plurality of electrode assemblies each prepared by inserting between a pair of mutually facing parallel high voltage electrodes an electric charge-collecting electrode having a plurality of metal wires spatially arranged in a plane parallel with said paired high voltage electrodes, and wherein the single or plural electrode assemblies are received in a case provided with a radiation inlet section and filled with a gaseous element mainly consisting of a rare gas such as argon or xenon.