Abstract: An engine cooling device is provided, which uses a fewer number of ducts for coolant circulation to reduce cost and weight and to make the duct layout easy, and which improves the durability of a differential pressure valve. In the engine cooling device in which a coolant is circulated by a water pump 4 through a coolant circulation flow path 9 at least including a heater circulation flow path 7 that circulates the coolant between a cooling jacket 1 provided at least to one of a cylinder head and a cylinder block of the engine and a heater core 6, a bypass flow path 8 that communicates the cooling jacket 1 with a portion of the heater circulation flow path 7 downstream of the heater core 6 is provided, and a differential pressure valve 11 that opens when fluid pressure on the side of the cooling jacket 1 exceeds a predetermined value is disposed at a point of exit of the coolant from the cooling jacket 1 to the bypass flow path 8.

Abstract: An intake system for an electronic control fuel injection system for a double overhead camshaft type internal combustion engine. The intake system has a surge tank connected via a connection pipe to a throttle body in which a throttle valve is arranged. A recess is formed between a cover for the intake camshaft and a cover for the exhaust camshaft. The throttle body is at least partially arranged in the recess.

Abstract: An improved throttle valve assembly of the type which includes a throttle body provided with a throttle lever and a second, intermediate lever interconnected with each other by a roller/cam slot mechanism, said throttle lever being adapted to be moved by said second lever which is connected through the throttle linkage to the accelerator. The improvement comprises means disposed between the throttle lever and the second lever for adjusting the clearance existing between the cam slot and roller when the throttle valve is located in the vicinity of the idle position thereof, so that the excessive play that would otherwise arise at the accelerator when the throttle valve is in the idle position is reduced or avoided.