Exhaust braking system for an internal combustion engine

An exhaust braking system for an internal combustion engine having an inlet valve and an exhaust valve, the system comprising an induction valve arranged to be connected in an induction passage to the inlet valve, an exhaust brake arranged to be connected in an exhaust system connected with an exhaust valve, actuator means connected in a fluid circuit with the induction valve and exhaust brake for operating the induction valve and exhaust brake to close the induction passage and exhaust system when the rotational speed of the engine is to be retarded, timining means connected with the induction valve and exhaust brake for ensuring the exhaust brake is closed no later than the closing of the induction valve, a non-return valve arranged to be connected in the induction passage between the induction valve and inlet valve for facilitating an increase in pressure within a piston cylinder of the engine to increase the engine retardation, and pressure sensitive means arranged to be connected in the exhaust system for controlling maximum pressure of the braking system.

A method of operating an exhaust brake system for an internal combustion engine having an inlet valve and exhaust valve, the method comprising actuating an induction valve arranged to be connected in an induction passage to the inlet valve, actuating an exhaust brake arranged to be connected in an exhaust system connected with the exhaust valve, operating actuating means connected in a fluid circuit with the induction valve and exhaust brake to initiate actuation of the induction valve and exhaust brake through the intermediary of timing means connected with the induction valve and exhaust brake for ensuring the exhaust brake is closed no later than the closing of the induction valve to close the induction passage and exhaust system when the rotational speed of the engine is to be retarded, introducing the air into the induction passage through a non-return valve connected in the passage between the induction valve and inlet valve to facilitate increase in pressure within the piston cylinder of the engine to increase engine retardation, and controlling the maximum pressure of the braking system by venting the system through pressure sensitive means arranged to be connected in the induction passage.

A method of operating an exhaust brake system for an internal combustion engine having an inlet valve and exhaust valve, the method comprising actuating an induction valve arranged to be connected in an induction passage to the inlet valve, actuating an exhaust brake arranged to be connected in an exhaust system connected with the exhaust valve, operating actuating means connected in a fluid circuit with the induction valve and exhaust brake to initiate actuation of the induction valve and exhaust brake through the intermediary of timing means connected with the induction valve and exhaust brake for ensuring the exhaust brake is closed no later than the closing of the induction valve to close the induction passage and exhaust system when the rotational speed of the engine is to be retarded, introducing the air into the induction passage through a non-return valve connected in the passage between the induction valve and inlet valve to facilitate increase in pressure within the piston cylinder of the engine to increase engine retardation, and controlling the maximum pressure of the braking system by venting the system through pressure sensitive means arranged to be connected in the exhaust system.