Engine and engine exhaust control system

A vehicle system comprising:

• an engine configured to propel a vehicle;
• a transmission configured to transfer power from the engine to at least one drive wheel;
• an exhaust system configured to route exhaust away from the engine, the exhaust system having a catalyst and an outlet;
• an adjustable valve disposed within the exhaust system proximate to the outlet;
• a sensor configured to observe human gestures;
• and
• a controller programmed to,
• receive signals from the sensor indicative of the human gestures while the transmission is in a parked gear,
• in response to the sensor observing a first human gesture, increase an operating speed of the engine or adjust the valve to increase a noise output from the outlet of the exhaust system, and
• in response to the sensor observing (i) the first human gesture and (ii) an engine speed exceeding a threshold, override increasing the operating speed of the engine and maintain a current speed of the engine.

A vehicle system comprising:

• an engine configured to propel a vehicle;
• an exhaust system configured to route exhaust away from the engine;
• an adjustable valve disposed within the exhaust system;
• a sensor configured to observe human gestures;
• and
• a controller programmed to,
• receive signals from the sensor indicative of the human gestures while the vehicle is in a parked gear, and
• in response to the sensor observing a first human gesture, adjust the valve or increase an operating speed of the engine to increase a noise output from the exhaust system,
• in response to the sensor observing a second human gesture, adjust the valve to decrease a noise output from the exhaust system, and
• in response to the sensor observing (i) the first human gesture and (ii) an engine coolant temperature being less than a threshold, override increasing the operating speed of the engine.