Brake controlled ignition retarder

An ignition retarding device for an automotive vehicle having an internal combustion engine for propelling the vehicel and brakes for stopping the vehicle, in which the internal combustion engine has temperature sensing means controlled thereby for indicating when the temperature of the engine is excessively high, an ignition distributor adjustable to vary the ignition timing, means including a fluid motor for adjusting the ignition timing, and means including a connection between said fluid motor and the intake manifold of the engine for normally causing said motor to adjust the distributor to advance the timing as the vacuum in said intake manifold increases;

• and in which the brakes are controlled by a brake control having a switching device which is actuated to indicate the actuation of the brakes when the brake control is so operated;
• said ignition retarding device comprising:
• a control device for insertion into the connection between the motor and the intake manifold of the engine to prevent advance of the timing from an increase in the vacuum in the intake manifold;
• control means for said control device and designed for connection to the brake control switching device and effective when so connected and when said brake control is operated to actuate the brakes to cause said control device to prevent advance of the timing from the intake manifold vacuum;
• and means connected to said control means and designed for connection to the temperature sensing means and effective when so connected and when the temperature of the engine is excessively high to prevent said control device from preventing advance of the timing from the intake manifold vacuum.