Honda Giken Kogyo Kabushiki Kaisha

Hiroaki Hishida

Katsuaki Sato

Seiji Matsumoto

Sakuji Arai

Junichi Nakade

Susumu Kochi

A sealing structure in an exhaust system of an internal combustion engine includes a gasket which is clamped between a cylinder head and a flange fastened to the cylinder head and which has a sealing portion surrounding an exhaust port opening into a side of the cylinder head, and an exhaust pipe which is curved and coupled to the flange and which is in communication with the exhaust port. In this sealing structure, the sealing portion of the gasket is formed into an endless shape to surround said exhaust port, such that the distance between the sealing portion and a peripheral edge of the exhaust port, at least at a location substantially corresponding to a projected position of the exhaust pipe on the flange, is larger than the distance at other locations. Thus, it is possible to prevent or minimize the deterioration of the sealing portion of the gasket due to heat, while avoiding an increase in size of the section associated with the exhaust system.

Sealing structure in exhaust system of internal combustion engine

An oxygen concentration sensor for electrically sensing oxygen concentration in a gaseous body, including an oxygen pump element, a sensor cell element whose operating voltage is relatively low, and a heater element for heating the sensor cell element. For the electrical connection, the oxygen concentration sensor is provided with a first connector having terminals connected to the oxygen pump element and the heater element whose operating voltages are relatively high, and a second connector discretely from the first connector and having only terminals connected to the sensor cell element so that leakage of the relatively high operating voltage to the terminals of the sensor cell element is prevented.

Oxygen concentration sensor with an improved electrical connection for

An exhaust system for a vehicle engine having the catalytic converter structurally mounted on the side of the engine for rigid, non-vibrating support and a flexible tube connecting the catalytic converter to the engine exhaust for absorbing vibrations and accommodating thermal expansion and contraction.

Growing community of inventors

Saitama, Japan

Hiroaki Hishida